Fix create-executables.yml workflow to upload output to release page

* Modernize create-executables.yml

* Update version numbers

* Fix API version in test

.flake8

@@ -0,0 +1,11 @@
+[flake8]
+exclude =
+    src/engines/aerender
+    .git
+    build
+    dist
+    *.egg
+    venv
+    .venv
+max-complexity = 10
+max-line-length = 127

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install system deps
+        run: sudo apt-get update && sudo apt-get install -y libxcb-cursor0 libxcb-xinerama0 blender
+
+      - name: Install Python deps
+        run: |
+          pip install -r requirements.txt
+          pip install pytest flake8 pylint
+
+      - name: Test
+        run: python -m pytest tests/ --ignore=tests/job_creation_tests.py -v
+
+      - name: Lint — bugs (flake8)
+        # Fails on syntax errors only.  Ignored: ~100+ pre-existing
+        # style issues (E/W), star-import false positives (F403/F405),
+        # unused imports (F401), unused vars (F841), f-string debt (F541).
+        run: flake8 --select=E9 --exclude=src/engines/aerender,build,dist,.git,__pycache__,venv --max-line-length=127 --max-complexity=35
+
+      - name: Lint — style (flake8)
+        # Reports style issues but never fails the build.
+        # TODO: resolve ~100+ pre-existing style issues
+        run: flake8 --exit-zero --exclude=src/engines/aerender,build,dist,.git,__pycache__,venv --max-line-length=127 --max-complexity=35
+
+      - name: Lint (pylint)
+        # Reports all issues but never fails the build.
+        # TODO: resolve pre-existing debt (current score 7.73/10)
+        run: pylint src/ --max-line-length=120 --ignore-paths=^src/engines/aerender/ --fail-under=0

.github/workflows/create-executables.yml

@@ -0,0 +1,104 @@
+name: Create Executables
+
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build executables (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: windows-latest
+            artifact_suffix: windows
+          - os: ubuntu-latest
+            artifact_suffix: linux
+          - os: macos-latest
+            artifact_suffix: macos
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install Linux system dependencies
+        if: runner.os == 'Linux'
+        run: sudo apt-get update && sudo apt-get install -y libxcb-cursor0 libxcb-xinerama0
+
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip wheel setuptools
+          python -m pip install -r requirements.txt
+          python -m pip install pyinstaller pyinstaller_versionfile
+
+      - name: Build client
+        run: pyinstaller --clean client.spec
+
+      - name: Build server
+        run: pyinstaller --clean server.spec
+
+      - name: Package build outputs
+        shell: bash
+        env:
+          ARTIFACT_SUFFIX: ${{ matrix.artifact_suffix }}
+        run: |
+          python - <<'PY'
+          from pathlib import Path
+          import os
+          import zipfile
+
+          suffix = os.environ['ARTIFACT_SUFFIX']
+          dist_dir = Path('dist')
+          asset_dir = Path('release-assets')
+          asset_dir.mkdir(exist_ok=True)
+
+          for app_name in ('Zordon-client', 'Zordon-server'):
+              source = next(
+                  (
+                      path for path in (
+                          dist_dir / f'{app_name}.exe',
+                          dist_dir / f'{app_name}.app',
+                          dist_dir / app_name,
+                      )
+                      if path.exists()
+                  ),
+                  None,
+              )
+
+              if source is None:
+                  raise FileNotFoundError(f'Could not find PyInstaller output for {app_name}')
+
+              zip_path = asset_dir / f'{app_name}-{suffix}.zip'
+              with zipfile.ZipFile(zip_path, 'w', compression=zipfile.ZIP_DEFLATED) as zip_file:
+                  if source.is_dir():
+                      for file_path in source.rglob('*'):
+                          if file_path.is_file():
+                              zip_file.write(file_path, source.name / file_path.relative_to(source))
+                  else:
+                      zip_file.write(source, source.name)
+          PY
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: Zordon-build-${{ matrix.artifact_suffix }}
+          path: release-assets/*.zip
+          if-no-files-found: error
+
+      - name: Attach assets to release
+        if: github.event_name == 'release'
+        shell: bash
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: gh release upload "${{ github.event.release.tag_name }}" release-assets/*.zip --clobber

.github/workflows/pylint.yml

@@ -1,23 +0,0 @@
-name: Pylint
-
-on: [push]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ["3.8", "3.9", "3.10"]
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install pylint
-    - name: Analysing the code with pylint
-      run: |
-        pylint $(git ls-files '*.py')

.github/workflows/python-app.yml

@@ -1,39 +0,0 @@
-# This workflow will install Python dependencies, run tests and lint with a single version of Python
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-
-name: Python application
-
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python 3.10
-      uses: actions/setup-python@v3
-      with:
-        python-version: "3.10"
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-    - name: Lint with flake8
-      run: |
-        # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
-      run: |
-        pytest

.gitignore

@@ -1,8 +1,16 @@
-/job_history.json
 *.icloud
 *.fcpxml
 /uploads
 *.pyc
-/server_state.json
-/.scheduler_prefs
 *.db
+/dist/
+/build/
+/.github/
+*.idea
+.DS_Store
+/venv/
+.env
+venv/
+/.eggs/
+/.ai/
+/.github/

.pylintrc

@@ -0,0 +1,5 @@
+[MASTER]
+max-line-length = 120
+ignore-paths=^src/engines/aerender/
+[MESSAGES CONTROL]
+disable = missing-docstring, invalid-name, import-error, logging-fstring-interpolation

LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Brett Williams
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,23 +1,220 @@
-# 🎬 Zordon - Render Management Tools 🎬
+![Zordon Screenshot](docs/screenshot.png)
 
-Welcome to Zordon! This is a hobby project written with fellow filmmakers in mind. It's a local network render farm manager, aiming to streamline and simplify the rendering process across multiple home computers.
+---
 
-## 📦 Installation
+# Zordon
 
-Make sure to install the necessary dependencies: `pip3 install -r requirements.txt`
+A Python-based distributed rendering management tool that supports Blender, FFmpeg, and other render engines. Zordon efficiently manages render jobs across multiple machines, making it ideal for small render farms in home studios or small businesses.
 
-## 🚀 How to Use
+## What is Zordon?
 
-Zordon has two main files: `start_server.py` and `start_client.py`.
+Zordon is a tool designed for small render farms, such as those used in home studios or small businesses, to efficiently manage and run render jobs for Blender, FFmpeg, and other video renderers. It simplifies the process of distributing rendering tasks across multiple available machines, optimizing the rendering workflow for artists, animators, and video professionals.
 
-- **start_server.py**: Run this on any computer you want to render jobs. It manages the incoming job queue and kicks off the appropriate render jobs when ready.
+The system works by:
-- **start_client.py**: Run this to administer your render servers. It lets you manage and submit jobs.
+- **Server**: Central coordinator that manages job queues and distributes tasks to available workers
+- **Clients**: Lightweight workers that run on rendering machines and execute assigned jobs
+- **API**: RESTful endpoints for programmatic job submission and monitoring
 
-When the server is running, the job queue can be accessed via a web browser on the server's hostname (default port is 8080). You can also access it via the GUI client or a simple view-only dashboard.
+## Features
 
-## 🎨 Supported Renderers
+- **Distributed Rendering**: Queue and distribute render jobs across multiple machines
+- **Multi-Engine Support**: Compatible with Blender, FFmpeg, and extensible to other render engines
+- **Desktop UI**: PyQt6 interface for job management and monitoring
+- **REST API**: Flask-based API for programmatic access
+- **Cross-Platform**: Runs on Windows, macOS, and Linux
+- **Zero-Install Clients**: Lightweight client executables for worker machines
 
-Zordon currently supports the following renderers:
+## Installation
+
+### Prerequisites
+
+- Python 3.11 or later
+- Git
+
+### Setup
+
+1. Clone the repository:
+   ```bash
+   git clone https://github.com/blw1138/Zordon.git
+   cd Zordon
+   ```
+
+2. Install dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+
+3. (Optional) Install PyInstaller for building executables:
+   ```bash
+   pip install pyinstaller pyinstaller_versionfile
+   ```
+
+## Usage
+
+### Quick Start
+
+1. **Start the Server**: Run the central server to coordinate jobs.
+   ```bash
+   python server.py
+   ```
+
+2. **Launch Clients**: On each rendering machine, run the client to connect to the server.
+   ```bash
+   python client.py
+   ```
+
+
+
+### Detailed Workflow
+
+#### Setting Up a Render Farm
+
+1. Choose one machine as the server (preferably a dedicated machine with good network connectivity).
+2. Build and distribute client executables to worker machines:
+   ```bash
+   pyinstaller client.spec
+   ```
+   Copy the generated executable to each worker machine.
+
+3. Ensure all machines can communicate via network (same subnet recommended).
+
+#### Submitting Render Jobs
+
+Jobs can be submitted via the desktop UI or programmatically via the API:
+
+- **Via UI**: Use the desktop interface to upload project files, specify render settings, and queue jobs.
+- **Via API**: Send `POST` requests to `/api/jobs` with job configuration in JSON format.
+
+Example API request:
+```bash
+curl -X POST http://localhost:8080/api/jobs \
+  -H "Content-Type: application/json" \
+  -d '{
+    "name": "example-render",
+    "engine_name": "blender",
+    "local_path": "/path/to/project.blend",
+    "output_path": "example-output",
+    "start_frame": 1,
+    "end_frame": 100,
+    "args": {
+      "export_format": "PNG",
+      "resolution": [1920, 1080]
+    },
+    "enable_split_jobs": false
+  }'
+```
+
+#### Monitoring and Managing Jobs
+
+- **UI**: View job status, progress, logs, and worker availability in real-time.
+- **API Endpoints**:
+  - `GET /api/jobs`: List all jobs
+  - `POST /api/jobs`: Submit a new job
+  - `GET /api/jobs/<job_id>`: Get job details
+  - `POST /api/jobs/<job_id>/cancel`: Cancel a job
+  - `POST /api/jobs/<job_id>/delete`: Delete a job
+  - `GET /api/status`: Get server and queue status
+  - `GET /api/engines`: List engine information
+
+For the full endpoint reference, see [`docs/api.html`](docs/api.html) or
+[`docs/API.md`](docs/API.md).
+
+#### Blender Add-on
+
+Zordon includes a Blender add-on for submitting the current `.blend` file
+directly from Blender.
+
+- Source: [`addons/blender/zordon_blender`](addons/blender/zordon_blender)
+- Installable zip: [`addons/blender/zordon_blender.zip`](addons/blender/zordon_blender.zip)
+
+After installing the add-on, use `Properties > Render > Zordon` to discover or
+choose a server, test the connection, upload the current file, and submit
+camera-specific jobs from the active Blender scene.
+
+#### Worker Management
+
+Workers automatically connect to the server when started. You can:
+- View worker status and capabilities in the dashboard
+- Configure worker priorities and resource limits
+- Monitor CPU/GPU usage per worker
+
+### Development Mode
+
+For development and testing:
+
+Run the server:
+```bash
+python server.py
+```
+
+Run a client (can run multiple for testing):
+```bash
+python client.py
+```
+
+
+### Building Executables
+
+Build server executable:
+```bash
+pyinstaller server.spec
+```
+
+Build client executable:
+```bash
+pyinstaller client.spec
+```
+
+## Configuration
+
+Settings are stored in `src/utilities/config.py`. Supports YAML/JSON for data serialization and environment-specific configurations.
+
+## Architecture
+
+Zordon follows a modular architecture with the following key components:
+
+- **API Server** (`src/api/`): Flask-based REST API
+- **Engine System** (`src/engines/`): Pluggable render engines (Blender, FFmpeg, etc.)
+- **UI** (`src/ui/`): PyQt6-based interface
+- **Job Management** (`src/render_queue.py`): Distributed job queue
+
+Design patterns include Factory Pattern for engine creation, Observer Pattern for status updates, and Strategy Pattern for different worker implementations.
+
+## Contributing
+
+1. Fork the repository
+2. Create a feature branch: `git checkout -b feature/your-feature`
+3. Follow the code style guidelines in `AGENTS.md`
+4. Test the build: `pyinstaller server.spec`
+5. Submit a pull request
+
+### Commit Message Format
+
+```
+feat: add support for new render engine
+fix: resolve crash when engine path is invalid
+docs: update API documentation
+refactor: simplify job status handling
+```
+
+## Supported Render Engines
 
 - **Blender**
-- **FFMPEG**
+- **FFmpeg**
+- **Adobe After Effects** (planned)
+- **Cinema 4D** (planned)
+- **Autodesk Maya** (planned)
+
+## System Requirements
+
+- Windows 10 or later
+- macOS Ventura (13.0) or later
+- Linux (supported versions TBD)
+
+## License
+
+Zordon is licensed under the MIT License. See the [LICENSE](LICENSE.txt) file for more details.
+
+## Notice
+
+This software is in beta and intended for casual/hobbyist use. Not recommended for mission-critical environments.

add_job.py

@@ -0,0 +1,131 @@
+#!/usr/bin/env python3
+
+import argparse
+import logging
+import os
+import socket
+import sys
+import time
+
+from server import ZordonServer
+from src.api.serverproxy_manager import ServerProxyManager
+
+logger = logging.getLogger()
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Zordon CLI tool for preparing/submitting a render job",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter
+    )
+
+    # Required arguments
+    parser.add_argument("scene_file", help="Path to the scene file (e.g., .blend, .max, .mp4)")
+    parser.add_argument("engine", help="Desired render engine", choices=['blender', 'ffmpeg'])
+
+    # Frame range
+    parser.add_argument("--start", type=int, default=1, help="Start frame")
+    parser.add_argument("--end", type=int, default=1, help="End frame")
+
+    # Job metadata
+    parser.add_argument("--name", default=None, help="Job name")
+
+    # Output
+    parser.add_argument("--output", default="", help="Output path/pattern (e.g., /renders/frame_####.exr)")
+
+    # Target OS and Engine Version
+    parser.add_argument(
+        "--os",
+        choices=["any", "windows", "linux", "macos"],
+        default="any",
+        help="Target operating system for render workers"
+    )
+    parser.add_argument(
+        "--engine-version",
+        default="latest",
+        help="Required renderer/engine version number (e.g., '4.2', '5.0')"
+    )
+
+    # Optional flags
+    parser.add_argument("--dry-run", action="store_true", help="Print job details without submitting")
+
+    args = parser.parse_args()
+
+    # Basic validation
+    if not os.path.exists(args.scene_file):
+        print(f"Error: Scene file '{args.scene_file}' not found!", file=sys.stderr)
+        sys.exit(1)
+
+    if args.start > args.end:
+        print("Error: Start frame cannot be greater than end frame!", file=sys.stderr)
+        sys.exit(1)
+
+    # Calculate total frames
+    total_frames = len(range(args.start, args.end + 1))
+    job_name = args.name or os.path.basename(args.scene_file)
+    file_path = os.path.abspath(args.scene_file)
+
+    # Print job summary
+    print("Render Job Summary:")
+    print(f"  Job Name         : {job_name}")
+    print(f"  Scene File       : {file_path}")
+    print(f"  Engine           : {args.engine}")
+    print(f"  Frames           : {args.start}-{args.end} → {total_frames} frames")
+    print(f"  Output Path      : {args.output or '(default from scene)'}")
+    print(f"  Target OS        : {args.os}")
+    print(f"  Engine Version   : {args.engine_version}")
+
+    if args.dry_run:
+        print("\nDry run complete (no submission performed).")
+        return
+
+    local_hostname = socket.gethostname()
+    local_hostname = local_hostname + (".local" if not local_hostname.endswith(".local") else "")
+    found_proxy = ServerProxyManager.get_proxy_for_hostname(local_hostname)
+
+    is_connected = found_proxy.check_connection()
+    adhoc_server = None
+    if not is_connected:
+        adhoc_server = ZordonServer()
+        adhoc_server.start_server()
+        found_proxy = ServerProxyManager.get_proxy_for_hostname(adhoc_server.server_hostname)
+        while not is_connected:
+            # todo: add timeout
+            is_connected = found_proxy.check_connection()
+            time.sleep(1)
+
+    new_job = {"name": job_name, "engine_name": args.engine}
+    try:
+        response = found_proxy.create_job(file_path, new_job)
+    except Exception as e:
+        print(f"Error creating job: {e}")
+        exit(1)
+
+    if response and response.ok:
+        print(f"Uploaded to {found_proxy.hostname} successfully!")
+        running_job_data = response.json()
+        job_id = running_job_data.get('id')
+        print(f"Job {job_id} Summary:")
+        print(f"  Status           : {running_job_data.get('status')}")
+        print(f"  Engine           : {running_job_data.get('engine_name')}-{running_job_data.get('engine_version')}")
+
+        print("\nWaiting for render to complete...")
+        percent_complete = 0.0
+        while percent_complete < 1.0:
+            # add checks for errors
+            time.sleep(1)
+            running_job_data = found_proxy.get_job(job_id)
+            percent_complete = running_job_data['percent_complete']
+            sys.stdout.write("\x1b[1A")  # Move up 1
+            sys.stdout.write("\x1b[0J")  # Clear from cursor to end of screen (optional)
+            print(f"Percent Complete: {percent_complete:.2%}")
+            sys.stdout.flush()
+        print("Finished rendering successfully!")
+    else:
+        print(f"Failed to upload job. {response.text} !")
+
+    if adhoc_server:
+        adhoc_server.stop_server()
+
+
+if __name__ == "__main__":
+    main()

addons/blender/zordon_blender/README.md

@@ -0,0 +1,153 @@
+# Zordon Blender Add-on
+
+Submit the current Blender file to a Zordon render server from Blender's Render
+properties panel.
+
+## Features
+
+- Submit the current `.blend` file directly to `POST /api/jobs`.
+- Choose a configured Zordon server from Blender.
+- Test the server connection before submitting.
+- Save the current file before upload.
+- Default job and output names to the `.blend` filename.
+- Use the current scene frame range, render resolution, FPS, and image format.
+- Select one or more cameras for submission.
+- Submit multiple selected cameras as camera-specific child jobs.
+
+## Install
+
+1. In Blender, open `Edit > Preferences > Add-ons`.
+2. Click `Install...`.
+3. Select `addons/blender/zordon_blender.zip`.
+4. Enable `Zordon Render Submitter`.
+
+## Configure Servers
+
+Use `Discover Servers` to find Zordon servers advertised with Zeroconf.
+Discovered servers are merged into the configured server list.
+
+You can also open the add-on preferences and edit `Servers` manually.
+
+Use a comma-separated list:
+
+```text
+localhost:8080, render-node.local:8080
+```
+
+The selected server appears in `Properties > Render > Zordon`.
+
+If Blender is running on the same machine as Zordon, `localhost:8080` should
+work. If Zordon is running on another machine, use that machine's hostname or IP
+address.
+
+Start the Zordon server before testing the connection:
+
+```bash
+python server.py
+```
+
+Discovery first tries Python's `zeroconf` package if it is available inside
+Blender. If it is not available, the add-on falls back to the macOS `dns-sd`
+command when present.
+
+## Submit A Job
+
+1. Open or save a `.blend` file.
+2. Choose a Zordon server in `Properties > Render > Zordon`.
+3. Click `Test Connection`.
+4. Set the job name, output name, and notes if needed.
+5. Choose one or more cameras. At least one camera is always required.
+6. Click `Submit Current File`.
+
+The addon uploads the current `.blend` to `POST /api/jobs` as multipart form
+data. It uses the current scene frame range, render resolution, FPS, and image
+format.
+
+Job name and output name default to the current `.blend` filename.
+
+If one camera is selected, the job renders that camera. If multiple cameras are
+selected, the addon submits camera-specific child jobs so each camera renders as
+its own Zordon job.
+
+Use `All` to select every camera or `Active Only` to render just the active
+scene camera.
+
+## Camera Behavior
+
+At least one camera must be selected. The add-on prevents unchecking the final
+selected camera.
+
+When one camera is selected, the add-on sends a single job with:
+
+```json
+{
+  "args": {
+    "camera": "Camera"
+  }
+}
+```
+
+When multiple cameras are selected, the add-on sends `child_jobs`. Each child job
+gets its own camera argument and output name suffix, such as:
+
+```json
+{
+  "name": "scene_Camera-001",
+  "output_path": "scene_Camera-001",
+  "args": {
+    "camera": "Camera.001"
+  }
+}
+```
+
+## Troubleshooting
+
+### Could Not Reach Zordon
+
+Make sure the Zordon server is running and reachable from Blender.
+
+Check from a terminal:
+
+```bash
+curl http://localhost:8080/api/heartbeat
+```
+
+If the server is remote, replace `localhost` with the server hostname or IP.
+
+### No Cameras Found
+
+Add at least one Blender camera to the scene before submitting.
+
+### Output Files Already Exist
+
+Multiple camera jobs should use camera-specific output names. If they collide,
+make sure the Zordon server includes the output-path fix that preserves child
+job `output_path` values.
+
+## Packaging
+
+The add-on source lives at:
+
+```text
+addons/blender/zordon_blender/
+```
+
+The installable archive is:
+
+```text
+addons/blender/zordon_blender.zip
+```
+
+Rebuild the archive from `addons/blender`:
+
+```bash
+python3 -m zipfile -c zordon_blender.zip zordon_blender
+```
+
+## Notes
+
+- The add-on is dependency-free and uses Blender's bundled Python standard
+  library.
+- Only `http://` Zordon servers are currently supported.
+- `Save Before Submit` is enabled by default so the uploaded file matches the
+  current Blender state.

addons/blender/zordon_blender/__init__.py

@@ -0,0 +1,621 @@
+bl_info = {
+    'name': 'Zordon Render Submitter',
+    'author': 'Zordon',
+    'version': (0, 1, 0),
+    'blender': (3, 6, 0),
+    'location': 'Properties > Render > Zordon',
+    'description': 'Submit the current Blender file to a Zordon render server.',
+    'category': 'Render',
+}
+
+import getpass
+import http.client
+import json
+import os
+import re
+import socket
+import subprocess
+import time
+from urllib.parse import urlparse
+from urllib.request import Request, urlopen
+from urllib.error import HTTPError, URLError
+
+import bpy
+from bpy.props import BoolProperty, EnumProperty, IntProperty, StringProperty
+from bpy.types import AddonPreferences, Operator, Panel, PropertyGroup
+
+
+DEFAULT_SERVER = 'localhost:8080'
+DEFAULT_TIMEOUT = 10
+UPLOAD_TIMEOUT = 300
+ZORDON_SERVICE_TYPE = '_zordon._tcp.local.'
+
+
+def _addon_preferences(context):
+    return context.preferences.addons[__name__].preferences
+
+
+def _configured_server_items(self, context):
+    preferences = _addon_preferences(context)
+    raw_servers = [server.strip() for server in preferences.servers.split(',')]
+    servers = [server for server in raw_servers if server]
+    if not servers:
+        servers = [DEFAULT_SERVER]
+    return [(server, server, '', index) for index, server in enumerate(servers)]
+
+
+def _normalize_server_url(server, fallback_port):
+    if not server:
+        server = DEFAULT_SERVER
+
+    server = server.strip()
+    if not server.startswith(('http://', 'https://')):
+        server = f'http://{server}'
+
+    parsed = urlparse(server)
+    hostname = parsed.hostname or 'localhost'
+    scheme = parsed.scheme or 'http'
+    port = parsed.port or fallback_port or 8080
+    return scheme, hostname, int(port)
+
+
+def _api_url(server, port, path):
+    scheme, hostname, parsed_port = _normalize_server_url(server, port)
+    return f'{scheme}://{hostname}:{parsed_port}{path}'
+
+
+def _get_text(server, port, path, timeout=DEFAULT_TIMEOUT):
+    request = Request(_api_url(server, port, path), method='GET')
+    with urlopen(request, timeout=timeout) as response:
+        return response.status, response.read().decode('utf-8')
+
+
+def _server_list_from_preferences(preferences):
+    return [server.strip() for server in preferences.servers.split(',') if server.strip()]
+
+
+def _save_server_list(preferences, servers):
+    unique_servers = []
+    for server in servers:
+        if server and server not in unique_servers:
+            unique_servers.append(server)
+    preferences.servers = ', '.join(unique_servers)
+
+
+def _discover_servers_with_zeroconf(timeout=3.0):
+    try:
+        from zeroconf import ServiceBrowser, Zeroconf
+    except ImportError:
+        return []
+
+    discovered = []
+    zeroconf = Zeroconf()
+
+    class Listener:
+        def add_service(self, zc, service_type, name):
+            info = zc.get_service_info(service_type, name, timeout=1000)
+            if info and info.server and info.port:
+                discovered.append(f'{info.server.rstrip(".")}:{info.port}')
+
+        def update_service(self, zc, service_type, name):
+            self.add_service(zc, service_type, name)
+
+        def remove_service(self, zc, service_type, name):
+            pass
+
+    try:
+        ServiceBrowser(zeroconf, ZORDON_SERVICE_TYPE, Listener())
+        time.sleep(timeout)
+    finally:
+        zeroconf.close()
+
+    return discovered
+
+
+def _discover_service_names_with_dns_sd(timeout=2.0):
+    try:
+        process = subprocess.Popen(
+            ['dns-sd', '-B', '_zordon', '_tcp', 'local'],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.DEVNULL,
+            text=True,
+        )
+    except (FileNotFoundError, OSError):
+        return []
+
+    try:
+        stdout, _ = process.communicate(timeout=timeout)
+    except subprocess.TimeoutExpired:
+        process.terminate()
+        stdout, _ = process.communicate(timeout=1)
+
+    service_names = []
+    for line in stdout.splitlines():
+        if ' Add ' not in line:
+            continue
+        parts = line.split()
+        if len(parts) >= 7:
+            service_name = ' '.join(parts[6:])
+            if service_name and service_name not in service_names:
+                service_names.append(service_name)
+    return service_names
+
+
+def _resolve_service_with_dns_sd(service_name, timeout=2.0):
+    try:
+        process = subprocess.Popen(
+            ['dns-sd', '-L', service_name, '_zordon', '_tcp', 'local'],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.DEVNULL,
+            text=True,
+        )
+    except (FileNotFoundError, OSError):
+        return None
+
+    try:
+        stdout, _ = process.communicate(timeout=timeout)
+    except subprocess.TimeoutExpired:
+        process.terminate()
+        stdout, _ = process.communicate(timeout=1)
+
+    for line in stdout.splitlines():
+        if ' can be reached at ' not in line:
+            continue
+        match = re.search(r'can be reached at\s+([^:\s]+):(\d+)', line)
+        if match:
+            hostname, port = match.groups()
+            return f'{hostname.rstrip(".")}:{port}'
+    return None
+
+
+def _discover_servers_with_dns_sd():
+    servers = []
+    for service_name in _discover_service_names_with_dns_sd():
+        server = _resolve_service_with_dns_sd(service_name)
+        if server and server not in servers:
+            servers.append(server)
+    return servers
+
+
+def _discover_zordon_servers():
+    discovered = _discover_servers_with_zeroconf()
+    if discovered:
+        return discovered
+    return _discover_servers_with_dns_sd()
+
+
+def _send_multipart_job(server, port, job_data, file_path):
+    scheme, hostname, parsed_port = _normalize_server_url(server, port)
+    if scheme != 'http':
+        raise ValueError('Only http:// Zordon servers are currently supported.')
+
+    boundary = f'----ZordonBlender{int(time.time() * 1000)}'
+    json_payload = json.dumps(job_data).encode('utf-8')
+    file_name = os.path.basename(file_path)
+    file_size = os.path.getsize(file_path)
+
+    parts_before_file = [
+        f'--{boundary}\r\n',
+        'Content-Disposition: form-data; name="json"\r\n',
+        'Content-Type: application/json\r\n\r\n',
+        json_payload.decode('utf-8'),
+        '\r\n',
+        f'--{boundary}\r\n',
+        f'Content-Disposition: form-data; name="file"; filename="{file_name}"\r\n',
+        'Content-Type: application/octet-stream\r\n\r\n',
+    ]
+    preamble = ''.join(parts_before_file).encode('utf-8')
+    closing = f'\r\n--{boundary}--\r\n'.encode('utf-8')
+    content_length = len(preamble) + file_size + len(closing)
+
+    connection = http.client.HTTPConnection(hostname, parsed_port, timeout=UPLOAD_TIMEOUT)
+    try:
+        connection.putrequest('POST', '/api/jobs')
+        connection.putheader('Content-Type', f'multipart/form-data; boundary={boundary}')
+        connection.putheader('Content-Length', str(content_length))
+        connection.endheaders()
+        connection.send(preamble)
+
+        with open(file_path, 'rb') as upload_file:
+            while True:
+                chunk = upload_file.read(1024 * 1024)
+                if not chunk:
+                    break
+                connection.send(chunk)
+
+        connection.send(closing)
+        response = connection.getresponse()
+        response_body = response.read().decode('utf-8', errors='replace')
+        return response.status, response_body
+    finally:
+        connection.close()
+
+
+def _current_file_path():
+    return bpy.data.filepath
+
+
+def _default_job_name():
+    file_path = _current_file_path()
+    if file_path:
+        return os.path.splitext(os.path.basename(file_path))[0]
+    return 'Blender Render'
+
+
+def _camera_objects():
+    return [obj for obj in bpy.data.objects if obj.type == 'CAMERA']
+
+
+def _default_selected_camera_names(scene):
+    cameras = _camera_objects()
+    if not cameras:
+        return []
+    if scene.camera:
+        return [scene.camera.name]
+    if len(cameras) == 1:
+        return [cameras[0].name]
+    return []
+
+
+def _selected_camera_names(props, scene=None):
+    if props.selected_cameras:
+        try:
+            names = json.loads(props.selected_cameras)
+        except json.JSONDecodeError:
+            names = []
+        existing_names = {camera.name for camera in _camera_objects()}
+        selected_names = [name for name in names if name in existing_names]
+        if selected_names:
+            return selected_names
+    if scene:
+        return _default_selected_camera_names(scene)
+    return []
+
+
+def _set_selected_camera_names(props, camera_names):
+    props.selected_cameras = json.dumps(list(camera_names))
+
+
+def _active_camera_names(scene):
+    if scene.camera:
+        return [scene.camera.name]
+    return _default_selected_camera_names(scene)
+
+
+def _scene_export_format(scene):
+    file_format = scene.render.image_settings.file_format
+    return file_format or 'PNG'
+
+
+class ZORDON_AddonPreferences(AddonPreferences):
+    bl_idname = __name__
+
+    servers: StringProperty(
+        name='Servers',
+        description='Comma-separated Zordon servers. Example: studio-render.local:8080, localhost:8080',
+        default=DEFAULT_SERVER,
+    )
+
+    def draw(self, context):
+        layout = self.layout
+        layout.prop(self, 'servers')
+        layout.operator('zordon.discover_servers', icon='VIEWZOOM')
+
+
+class ZORDON_SubmissionProperties(PropertyGroup):
+    server: EnumProperty(
+        name='Server',
+        description='Zordon server to submit this file to',
+        items=_configured_server_items,
+    )
+    port: IntProperty(
+        name='Fallback Port',
+        description='Port used when the selected server does not include one',
+        default=8080,
+        min=1,
+        max=65535,
+    )
+    job_name: StringProperty(
+        name='Job Name',
+        description='Name shown in Zordon',
+        default='',
+    )
+    output_path: StringProperty(
+        name='Output Name',
+        description='Output name or path used by the Zordon job',
+        default='',
+    )
+    notes: StringProperty(
+        name='Notes',
+        description='Optional notes for the Zordon job',
+        default='',
+    )
+    save_before_submit: BoolProperty(
+        name='Save Before Submit',
+        description='Save the current .blend before uploading it',
+        default=True,
+    )
+    use_scene_frame_range: BoolProperty(
+        name='Use Scene Frame Range',
+        description='Submit the current scene frame start and end',
+        default=True,
+    )
+    selected_cameras: StringProperty(
+        name='Selected Cameras',
+        description='JSON encoded list of selected camera names',
+        default='',
+        options={'HIDDEN'},
+    )
+
+
+class ZORDON_OT_DiscoverServers(Operator):
+    bl_idname = 'zordon.discover_servers'
+    bl_label = 'Discover Servers'
+    bl_description = 'Find Zordon servers advertised with Zeroconf'
+
+    def execute(self, context):
+        preferences = _addon_preferences(context)
+        existing_servers = _server_list_from_preferences(preferences)
+        discovered_servers = _discover_zordon_servers()
+        if not discovered_servers:
+            self.report({'WARNING'}, 'No Zordon servers found.')
+            return {'CANCELLED'}
+
+        merged_servers = existing_servers + discovered_servers
+        _save_server_list(preferences, merged_servers)
+
+        props = getattr(context.scene, 'zordon_submission', None)
+        if props:
+            try:
+                props.server = discovered_servers[0]
+            except (TypeError, ValueError):
+                pass
+
+        self.report({'INFO'}, f'Found {len(discovered_servers)} Zordon server(s).')
+        return {'FINISHED'}
+
+
+class ZORDON_OT_TestConnection(Operator):
+    bl_idname = 'zordon.test_connection'
+    bl_label = 'Test Connection'
+    bl_description = 'Check whether the selected Zordon server is reachable'
+
+    def execute(self, context):
+        props = context.scene.zordon_submission
+        try:
+            status, body = _get_text(props.server, props.port, '/api/heartbeat')
+        except (HTTPError, URLError, TimeoutError, OSError) as error:
+            self.report({'ERROR'}, f'Could not reach Zordon: {error}')
+            return {'CANCELLED'}
+
+        if status == 200:
+            self.report({'INFO'}, f'Connected to Zordon: {body}')
+            return {'FINISHED'}
+
+        self.report({'ERROR'}, f'Unexpected response from Zordon: HTTP {status}')
+        return {'CANCELLED'}
+
+
+class ZORDON_OT_RefreshCameras(Operator):
+    bl_idname = 'zordon.refresh_cameras'
+    bl_label = 'Refresh Cameras'
+    bl_description = 'Refresh the camera checklist from the current Blender scene'
+
+    def execute(self, context):
+        _set_selected_camera_names(
+            context.scene.zordon_submission,
+            _default_selected_camera_names(context.scene),
+        )
+        return {'FINISHED'}
+
+
+class ZORDON_OT_ToggleCamera(Operator):
+    bl_idname = 'zordon.toggle_camera'
+    bl_label = 'Toggle Camera'
+    bl_description = 'Toggle whether this camera is submitted to Zordon'
+
+    camera_name: StringProperty(name='Camera Name')
+
+    def execute(self, context):
+        props = context.scene.zordon_submission
+        selected = set(_selected_camera_names(props, context.scene))
+        if self.camera_name in selected:
+            if len(selected) == 1:
+                self.report({'WARNING'}, 'At least one camera must be selected.')
+                return {'CANCELLED'}
+            selected.remove(self.camera_name)
+        else:
+            selected.add(self.camera_name)
+        _set_selected_camera_names(props, sorted(selected))
+        return {'FINISHED'}
+
+
+class ZORDON_OT_SelectAllCameras(Operator):
+    bl_idname = 'zordon.select_all_cameras'
+    bl_label = 'All'
+    bl_description = 'Select all cameras for submission'
+
+    def execute(self, context):
+        props = context.scene.zordon_submission
+        _set_selected_camera_names(props, [camera.name for camera in _camera_objects()])
+        return {'FINISHED'}
+
+
+class ZORDON_OT_SelectActiveCamera(Operator):
+    bl_idname = 'zordon.select_active_camera'
+    bl_label = 'Active Only'
+    bl_description = 'Select only the active scene camera'
+
+    def execute(self, context):
+        active_cameras = _active_camera_names(context.scene)
+        if not active_cameras:
+            self.report({'WARNING'}, 'No cameras found.')
+            return {'CANCELLED'}
+        _set_selected_camera_names(context.scene.zordon_submission, active_cameras)
+        return {'FINISHED'}
+
+
+class ZORDON_OT_SubmitCurrentFile(Operator):
+    bl_idname = 'zordon.submit_current_file'
+    bl_label = 'Submit Current File'
+    bl_description = 'Upload the current Blender file to the selected Zordon server'
+
+    def execute(self, context):
+        props = context.scene.zordon_submission
+        scene = context.scene
+        file_path = _current_file_path()
+
+        if not file_path:
+            self.report({'ERROR'}, 'Save this Blender file before submitting it to Zordon.')
+            return {'CANCELLED'}
+
+        if props.save_before_submit:
+            bpy.ops.wm.save_as_mainfile(filepath=file_path)
+
+        job_name = props.job_name.strip() or _default_job_name()
+        output_path = props.output_path.strip() or job_name
+        selected_cameras = _selected_camera_names(props, scene)
+        if not selected_cameras:
+            self.report({'ERROR'}, 'Add at least one camera before submitting to Zordon.')
+            return {'CANCELLED'}
+        resolution = (
+            int(scene.render.resolution_x),
+            int(scene.render.resolution_y),
+        )
+
+        job_data = {
+            'owner': f'{getpass.getuser()}@{socket.gethostname()}',
+            'engine_name': 'blender',
+            'engine_version': 'latest',
+            'name': job_name,
+            'output_path': output_path,
+            'start_frame': int(scene.frame_start) if props.use_scene_frame_range else int(scene.frame_current),
+            'end_frame': int(scene.frame_end) if props.use_scene_frame_range else int(scene.frame_current),
+            'priority': 1,
+            'notes': props.notes,
+            'enable_split_jobs': False,
+            'split_jobs_same_os': False,
+            'args': {
+                'raw': '',
+                'export_format': _scene_export_format(scene),
+                'resolution': resolution,
+                'fps': scene.render.fps,
+            },
+        }
+
+        if len(selected_cameras) == 1:
+            job_data['args']['camera'] = selected_cameras[0]
+        elif len(selected_cameras) > 1:
+            child_jobs = []
+            for camera_name in selected_cameras:
+                camera_suffix = camera_name.replace(' ', '-')
+                child_args = dict(job_data['args'])
+                child_args['camera'] = camera_name
+                child_jobs.append({
+                    'name': f'{job_name}_{camera_suffix}',
+                    'output_path': f'{output_path}_{camera_suffix}',
+                    'args': child_args,
+                })
+            job_data['child_jobs'] = child_jobs
+
+        try:
+            status, body = _send_multipart_job(props.server, props.port, job_data, file_path)
+        except (ValueError, TimeoutError, OSError) as error:
+            self.report({'ERROR'}, f'Error submitting to Zordon: {error}')
+            return {'CANCELLED'}
+
+        if 200 <= status < 300:
+            self.report({'INFO'}, f'Submitted "{job_name}" to Zordon.')
+            return {'FINISHED'}
+
+        self.report({'ERROR'}, f'Zordon returned HTTP {status}: {body}')
+        return {'CANCELLED'}
+
+
+class ZORDON_PT_SubmitPanel(Panel):
+    bl_label = 'Zordon'
+    bl_idname = 'ZORDON_PT_submit_panel'
+    bl_space_type = 'PROPERTIES'
+    bl_region_type = 'WINDOW'
+    bl_context = 'render'
+
+    def draw(self, context):
+        props = context.scene.zordon_submission
+        layout = self.layout
+        default_name = _default_job_name()
+        cameras = _camera_objects()
+        selected_cameras = set(_selected_camera_names(props, context.scene))
+
+        layout.prop(props, 'server')
+        layout.prop(props, 'port')
+
+        row = layout.row(align=True)
+        row.operator('zordon.discover_servers', icon='VIEWZOOM')
+        row.operator('zordon.test_connection', icon='LINKED')
+
+        layout.separator()
+        if not props.job_name:
+            layout.label(text=f'Job Name Default: {default_name}')
+        layout.prop(props, 'job_name')
+        if not props.output_path:
+            layout.label(text=f'Output Name Default: {default_name}')
+        layout.prop(props, 'output_path')
+        layout.prop(props, 'notes')
+        layout.prop(props, 'save_before_submit')
+        layout.prop(props, 'use_scene_frame_range')
+
+        if props.use_scene_frame_range:
+            layout.label(text=f'Frames: {context.scene.frame_start} - {context.scene.frame_end}')
+        else:
+            layout.label(text=f'Frame: {context.scene.frame_current}')
+
+        layout.label(text=f'Format: {_scene_export_format(context.scene)}')
+
+        layout.separator()
+        camera_header = layout.row(align=True)
+        camera_header.label(text='Cameras')
+        camera_header.operator('zordon.refresh_cameras', text='', icon='FILE_REFRESH')
+        camera_header.operator('zordon.select_all_cameras', text='All')
+        camera_header.operator('zordon.select_active_camera', text='Active Only')
+
+        if cameras:
+            for camera in cameras:
+                icon = 'CHECKBOX_HLT' if camera.name in selected_cameras else 'CHECKBOX_DEHLT'
+                label = f'{camera.name} - {camera.data.lens:g}mm'
+                row = layout.row()
+                op = row.operator('zordon.toggle_camera', text=label, icon=icon, depress=camera.name in selected_cameras)
+                op.camera_name = camera.name
+        else:
+            layout.label(text='No cameras found')
+
+        layout.operator('zordon.submit_current_file', icon='RENDER_ANIMATION')
+
+
+classes = (
+    ZORDON_AddonPreferences,
+    ZORDON_SubmissionProperties,
+    ZORDON_OT_DiscoverServers,
+    ZORDON_OT_TestConnection,
+    ZORDON_OT_RefreshCameras,
+    ZORDON_OT_ToggleCamera,
+    ZORDON_OT_SelectAllCameras,
+    ZORDON_OT_SelectActiveCamera,
+    ZORDON_OT_SubmitCurrentFile,
+    ZORDON_PT_SubmitPanel,
+)
+
+
+def register():
+    for cls in classes:
+        bpy.utils.register_class(cls)
+    bpy.types.Scene.zordon_submission = bpy.props.PointerProperty(type=ZORDON_SubmissionProperties)
+
+
+def unregister():
+    del bpy.types.Scene.zordon_submission
+    for cls in reversed(classes):
+        bpy.utils.unregister_class(cls)
+
+
+if __name__ == '__main__':
+    register()

client.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+import logging
+import threading
+from collections import deque
+
+from server import ZordonServer
+
+logger = logging.getLogger()
+
+def __setup_buffer_handler():
+    # lazy load GUI frameworks
+    from PyQt6.QtCore import QObject, pyqtSignal
+
+    class BufferingHandler(logging.Handler, QObject):
+        new_record = pyqtSignal(str)
+        flushOnClose = True
+
+        def __init__(self, capacity=100):
+            logging.Handler.__init__(self)
+            QObject.__init__(self)
+            self.buffer = deque(maxlen=capacity)  # Define a buffer with a fixed capacity
+
+        def emit(self, record):
+            try:
+                msg = self.format(record)
+                self.buffer.append(msg)  # Add message to the buffer
+                self.new_record.emit(msg)  # Emit signal
+            except RuntimeError:
+                pass
+
+        def get_buffer(self):
+            return list(self.buffer)  # Return a copy of the buffer
+
+    buffer_handler = BufferingHandler()
+    buffer_handler.setFormatter(logging.getLogger().handlers[0].formatter)
+    new_logger = logging.getLogger()
+    new_logger.addHandler(buffer_handler)
+    return buffer_handler
+
+
+def __show_gui(buffer_handler):
+    # lazy load GUI frameworks
+    from PyQt6.QtWidgets import QApplication
+
+    # load application
+    app: QApplication = QApplication(sys.argv)
+    if app.style().objectName() != 'macos':
+        app.setStyle('Fusion')
+
+    # configure main window
+    from src.ui.main_window import MainWindow
+    window: MainWindow = MainWindow()
+    window.buffer_handler = buffer_handler
+    window.show()
+
+    exit_code = app.exec()
+
+    # cleanup: remove and close the GUI logging handler before interpreter shutdown
+    root_logger = logging.getLogger()
+    if buffer_handler in root_logger.handlers:
+        root_logger.removeHandler(buffer_handler)
+    try:
+        buffer_handler.close()
+    except Exception:
+        # never let logging cleanup throw during shutdown
+        pass
+
+    return exit_code
+
+if __name__ == '__main__':
+    import sys
+
+    server = ZordonServer()
+    server.start_server()
+    __show_gui(__setup_buffer_handler())
+    server.stop_server()
+    sys.exit()

client.spec

@@ -0,0 +1,158 @@
+# -*- mode: python ; coding: utf-8 -*-
+
+from PyInstaller.utils.hooks import collect_all
+from pathlib import Path
+import os
+import sys
+import platform
+
+# ------------------------------------------------------------
+# Project paths
+# ------------------------------------------------------------
+
+project_root = Path(SPECPATH).resolve()
+src_dir = project_root / "src"
+
+# Ensure `src.*` imports work during analysis
+sys.path.insert(0, str(project_root))
+
+# ------------------------------------------------------------
+# Import version info
+# ------------------------------------------------------------
+
+from src.version import APP_NAME, APP_VERSION, APP_AUTHOR
+
+APP_NAME = f"{APP_NAME}-client"
+
+# ------------------------------------------------------------
+# PyInstaller data / imports
+# ------------------------------------------------------------
+
+datas = [
+	("resources", "resources"),
+	("src/engines/blender/scripts", "src/engines/blender/scripts"),
+]
+
+binaries = []
+hiddenimports = ["zeroconf", "src.version"]
+
+tmp_ret = collect_all("zeroconf")
+datas += tmp_ret[0]
+binaries += tmp_ret[1]
+hiddenimports += tmp_ret[2]
+
+# ------------------------------------------------------------
+# Analysis
+# ------------------------------------------------------------
+
+a = Analysis(
+	["client.py"],
+	pathex=[str(project_root)],
+	binaries=binaries,
+	datas=datas,
+	hiddenimports=hiddenimports,
+	hookspath=[],
+	hooksconfig={},
+	runtime_hooks=[],
+	excludes=[],
+	noarchive=False,
+	optimize=1,  # optimize=2 breaks Windows builds
+)
+
+pyz = PYZ(a.pure)
+
+# ------------------------------------------------------------
+# Platform targets
+# ------------------------------------------------------------
+
+if platform.system() == "Darwin":  # macOS
+
+	exe = EXE(
+		pyz,
+		a.scripts,
+		[],
+		exclude_binaries=True,
+		name=APP_NAME,
+		debug=False,
+		bootloader_ignore_signals=False,
+		strip=True,
+		upx=True,
+		console=False,
+		disable_windowed_traceback=False,
+		argv_emulation=False,
+		target_arch=None,
+		codesign_identity=None,
+		entitlements_file=None,
+	)
+
+	app = BUNDLE(
+		exe,
+		a.binaries,
+		a.datas,
+		strip=True,
+		name=f"{APP_NAME}.app",
+		icon="resources/Server.png",
+		bundle_identifier=None,
+		version=APP_VERSION,
+	)
+
+elif platform.system() == "Windows":
+
+	import pyinstaller_versionfile
+	import tempfile
+
+	version_file_path = os.path.join(
+		tempfile.gettempdir(), "versionfile.txt"
+	)
+
+	pyinstaller_versionfile.create_versionfile(
+		output_file=version_file_path,
+		version=APP_VERSION,
+		company_name=APP_AUTHOR,
+		file_description=APP_NAME,
+		internal_name=APP_NAME,
+		legal_copyright=f"© {APP_AUTHOR}",
+		original_filename=f"{APP_NAME}.exe",
+		product_name=APP_NAME,
+	)
+
+	exe = EXE(
+		pyz,
+		a.scripts,
+		a.binaries,
+		a.datas,
+		[],
+		name=APP_NAME,
+		debug=False,
+		bootloader_ignore_signals=False,
+		strip=True,
+		upx=True,
+		console=False,
+		disable_windowed_traceback=False,
+		argv_emulation=False,
+		target_arch=None,
+		codesign_identity=None,
+		entitlements_file=None,
+		version=version_file_path,
+	)
+
+else:  # Linux
+
+	exe = EXE(
+		pyz,
+		a.scripts,
+		a.binaries,
+		a.datas,
+		[],
+		name=APP_NAME,
+		debug=False,
+		bootloader_ignore_signals=False,
+		strip=True,
+		upx=True,
+		console=False,
+		disable_windowed_traceback=False,
+		argv_emulation=False,
+		target_arch=None,
+		codesign_identity=None,
+		entitlements_file=None,
+	)

config/config.yaml

@@ -3,7 +3,7 @@ update_engines_on_launch: true
 max_content_path: 100000000
 server_log_level: info
 log_buffer_length: 250
-subjob_connection_timeout: 120
+worker_process_timeout: 120
 flask_log_level: error
 flask_debug_enable: false
 queue_eval_seconds: 1

docs/API.md

@@ -0,0 +1,487 @@
+# Zordon API Reference
+
+Zordon exposes a Flask API from `src/api/api_server.py`. The server is started by
+`start_api_server()` and listens on `Config.port_number` with all application
+routes mounted under `/api`.
+
+The in-repo client wrapper is `src/api/server_proxy.py`. Most UI and distributed
+rendering code should prefer `RenderServerProxy` instead of constructing request
+URLs directly.
+
+## Versioning
+
+- Current API version: `0.1`
+- `RenderServerProxy.request()` sends `X-API-Version` with the current
+  `API_VERSION`, but the server does not currently validate this header.
+
+## Response Conventions
+
+- JSON endpoints return Flask-serialized dictionaries or lists.
+- File endpoints return `send_file()` responses.
+- Most error responses are plain text with HTTP `400`, `404`, `500`, or `503`.
+- `JobNotFoundError` is mapped to HTTP `400`.
+- Unhandled exceptions are mapped to HTTP `500` with a plain-text message.
+
+## Jobs
+
+### `GET /api/jobs`
+
+Returns all render jobs and a cache token.
+
+Response:
+
+```json
+{
+  "jobs": [
+    {
+      "id": "job-id",
+      "name": "job name",
+      "status": "running"
+    }
+  ],
+  "token": "cache-token"
+}
+```
+
+Known callers:
+
+- `RenderServerProxy.get_jobs()`
+- `src/ui/main_window.py`
+
+### `GET /api/jobs/long_poll`
+
+Long-polls the job list until the supplied cache token changes or 30 seconds
+elapse.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `token` | No | Cache token returned by `/api/jobs`. |
+
+Responses:
+
+- `200` with the same shape as `/api/jobs` when jobs changed.
+- `204` with an empty body when no changes arrive before timeout.
+
+Known callers:
+
+- `RenderServerProxy.get_jobs()` through the background cache updater.
+
+### `GET /api/jobs/status/<status_val>`
+
+Returns jobs matching a render status.
+
+Path parameters:
+
+| Name | Description |
+| --- | --- |
+| `status_val` | Status string converted by `string_to_status()`. |
+
+Responses:
+
+- `200` with a list of job JSON objects when matches exist.
+- `400` when no jobs match the requested status.
+
+Review note: this route is not currently wrapped by `RenderServerProxy` and no
+in-repo callers were found.
+
+### `GET /api/jobs/<job_id>`
+
+Returns one job as JSON.
+
+Known callers:
+
+- `RenderServerProxy.get_job()`
+- `add_job.py`
+- `src/ui/main_window.py`
+- `src/distributed_job_manager.py`
+- `tests/job_creation_tests.py`
+
+### `GET /api/jobs/<job_id>/logs`
+
+Returns the job log file as `text/plain`.
+
+Known callers:
+
+- `src/ui/main_window.py` opens this URL directly.
+
+### `GET /api/jobs/<job_id>/files`
+
+Returns a list of output filenames for the job.
+
+Known callers:
+
+- `RenderServerProxy.get_job_files()`
+- `src/utilities/server_helper.py`
+
+### `GET /api/jobs/<job_id>/download`
+
+Downloads one output file.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `filename` | Yes | Case-insensitive filename from the job file list. |
+
+Responses:
+
+- `200` with the requested file as an attachment.
+- `400` when `filename` is missing.
+- `404` when the file is not found.
+
+Known callers:
+
+- `RenderServerProxy.download_job_file()`
+- `src/utilities/server_helper.py`
+
+### `GET /api/jobs/<job_id>/download_all`
+
+Creates a temporary zip of the job output directory and downloads it.
+
+Known callers:
+
+- `RenderServerProxy.download_all_job_files()`
+- `src/ui/main_window.py`
+- `src/utilities/server_helper.py`
+
+### `GET /api/jobs/<job_id>/thumbnail`
+
+Returns a generated preview image or video for a job.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `size` | No | `big` selects the larger preview path. Currently parsed but not applied. |
+| `video_ok` | No | If truthy and a video preview exists, video can be returned. |
+
+Responses:
+
+- `200` with `image/jpeg` or `video/mp4`.
+- `404` when no thumbnail is available.
+- `500` on preview generation errors.
+
+Known callers:
+
+- `src/ui/main_window.py`
+
+Review note: `size=big` is parsed into `big_thumb` but not used.
+
+## Job Lifecycle
+
+### `POST /api/jobs`
+
+Adds one or more render jobs.
+
+Request formats:
+
+- JSON request body.
+- Multipart form with a `json` field and optional `file` upload.
+
+Common job fields include:
+
+| Name | Description |
+| --- | --- |
+| `name` | Display name for the render job. |
+| `renderer` | Render engine name such as `blender` or `ffmpeg`. |
+| `start_frame` | First frame to render. |
+| `end_frame` | Last frame to render. |
+| `args` | Engine-specific render arguments. |
+| `enable_split_jobs` | Whether distributed subjobs may be created. |
+| `child_jobs` | Optional subjob definitions. |
+| `local_path` | Local file path used when posting to localhost. |
+
+Responses:
+
+- `200` with created job data.
+- `400` for invalid or missing job data.
+- `500` for unexpected processing or creation errors.
+
+Known callers:
+
+- `RenderServerProxy.create_job()`
+- `add_job.py`
+- `src/ui/add_job_window.py`
+- `src/distributed_job_manager.py`
+- `tests/job_creation_tests.py`
+
+### `POST /api/jobs/<job_id>/cancel`
+
+Cancels a job.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `confirm` | Yes | Must be truthy or the request is rejected. |
+| `redirect` | No | If truthy, redirects to `index`. |
+
+Known callers:
+
+- `RenderServerProxy.cancel_job()`
+- `src/ui/main_window.py`
+- `src/distributed_job_manager.py`
+
+### `POST /api/jobs/<job_id>/delete`
+
+Deletes a job, stops it first, deletes previews, and removes owned upload/output
+directories when safe.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `confirm` | Yes | Must be truthy or the request is rejected. |
+
+Known callers:
+
+- `RenderServerProxy.delete_job()`
+- `src/ui/main_window.py`
+
+### `POST /api/jobs/<job_id>/subjob_update`
+
+Notifies a parent job that a child/subjob changed state.
+
+Request body:
+
+- JSON representation of a subjob.
+
+Known callers:
+
+- `RenderServerProxy.send_subjob_update_notification()`
+- `src/distributed_job_manager.py`
+
+## Status and Environment
+
+### `GET /api/heartbeat`
+
+Returns the current timestamp as plain text. Used for fast connectivity checks.
+
+Known callers:
+
+- `RenderServerProxy.check_connection()`
+
+### `GET /api/status`
+
+Returns local system and queue status.
+
+Response includes:
+
+- timestamp
+- operating system and version
+- CPU brand, count, and current utilization
+- memory totals and current utilization
+- job counts
+- hostname and port
+- app and API versions
+
+Known callers:
+
+- `RenderServerProxy.get_status()`
+
+### `GET /api/presets`
+
+Returns `config/presets.yaml`.
+
+Review note: no in-repo callers were found.
+
+### `GET /api/cpu_benchmark`
+
+Runs a CPU benchmark for 10 seconds and returns the score as plain text.
+
+Known callers:
+
+- `src/utilities/server_helper.py`
+
+### `GET /api/disk_benchmark`
+
+Runs a disk I/O benchmark and returns write/read speeds.
+
+Review note: no in-repo callers were found.
+
+## Engines
+
+### `GET /api/engines/for_filename`
+
+Returns the engine name suitable for a project filename.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `filename` | Yes | Project filename or path. The client currently sends only the basename. |
+
+Known callers:
+
+- `RenderServerProxy.get_engine_for_filename()`
+- `src/ui/add_job_window.py`
+
+### `GET /api/engines`
+
+Returns installed engine data keyed by engine name.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `response_type` | No | `standard` or `full`; defaults to `standard`. |
+
+`full` responses also include supported extensions, supported export formats,
+system info, and UI options.
+
+Known callers:
+
+- `RenderServerProxy.get_engines()`
+- `src/ui/settings_window.py`
+- `src/ui/engine_browser.py`
+
+### `GET /api/engines/names`
+
+Returns installed engine names as a list without instantiating engine classes.
+Use this for lightweight selection UIs that only need engine names.
+
+Known callers:
+
+- `RenderServerProxy.get_engine_names()`
+- `src/ui/add_job_window.py`
+
+### `GET /api/engines/<engine_name>`
+
+Returns installed version data for a single engine.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `response_type` | No | `standard` or `full`; defaults to `standard`. |
+
+`full` responses also include supported extensions, supported export formats,
+system info, and UI options.
+
+Known callers:
+
+- `RenderServerProxy.get_engine()`
+- `src/ui/add_job_window.py`
+
+### `GET /api/engines/<engine_name>/availability`
+
+Returns whether an engine can accept jobs on this server, plus CPU count,
+installed versions, and hostname.
+
+Known callers:
+
+- `RenderServerProxy.get_engine_availability()`
+- `src/distributed_job_manager.py`
+
+### `GET /api/engines/<engine_name>/args`
+
+Returns engine arguments.
+
+Review note: no in-repo callers were found.
+
+### `GET /api/engines/<engine_name>/help`
+
+Returns engine help text.
+
+Known callers:
+
+- `src/ui/add_job_window.py` opens this URL directly.
+
+### `GET /api/engines/download_available`
+
+Checks whether a managed engine version is available to download.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `engine` | Yes | Engine name. |
+| `version` | Yes | Engine version. |
+| `system_os` | No | Target OS. |
+| `cpu` | No | Target CPU architecture. |
+
+Review note: no in-repo callers were found.
+
+### `GET /api/engines/most_recent_version`
+
+Finds the most recent downloadable version for an engine.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `engine` | Yes | Engine name. |
+| `system_os` | No | Target OS. |
+| `cpu` | No | Target CPU architecture. |
+
+Review note: no in-repo callers were found.
+
+### `POST /api/engines/download`
+
+Downloads a managed engine version.
+
+Query parameters:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `engine` | Yes | Engine name. |
+| `version` | Yes | Engine version. |
+| `system_os` | No | Target OS. |
+| `cpu` | No | Target CPU architecture. |
+
+Review note: no in-repo callers were found. Settings currently calls
+`EngineManager.download_engine()` directly instead of this API route.
+
+### `POST /api/engines/delete`
+
+Deletes a managed engine download.
+
+JSON body:
+
+| Name | Required | Description |
+| --- | --- | --- |
+| `engine` | Yes | Engine name. |
+| `version` | Yes | Engine version. |
+| `system_os` | No | Target OS. |
+| `cpu` | No | Target CPU architecture. |
+
+Known callers:
+
+- `RenderServerProxy.delete_engine_download()`
+- `src/ui/engine_browser.py`
+
+## Debug
+
+### `GET /api/_debug/detected_clients`
+
+Returns hostnames detected by Zeroconf.
+
+Review note: development/debug only, with an inline comment saying it probably
+should not ship.
+
+### `POST /api/_debug/clear_history`
+
+Clears render queue history and returns `success`.
+
+Review note: development/debug only.
+
+## Redundancy and Cleanup Review
+
+Routes with no in-repo callers found:
+
+- `GET /api/jobs/status/<status_val>`
+- `GET /api/presets`
+- `GET /api/disk_benchmark`
+- `GET /api/engines/<engine_name>/args`
+- `GET /api/engines/download_available`
+- `GET /api/engines/most_recent_version`
+- `POST /api/engines/download`
+- `GET /api/_debug/detected_clients`
+- `POST /api/_debug/clear_history`
+
+Routes or methods with cleanup risks:
+
+- `job_thumbnail()` parses `size=big` but never uses the resulting `big_thumb`
+  value.

docs/api.html

@@ -0,0 +1,577 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Zordon API Reference</title>
+<style>
+  :root {
+    --bg: #0d1117;
+    --surface: #161b22;
+    --surface2: #1c2333;
+    --border: #30363d;
+    --text: #e6edf3;
+    --text-muted: #8b949e;
+    --blue: #58a6ff;
+    --green: #3fb950;
+    --orange: #d29922;
+    --red: #f85149;
+    --purple: #bc8cff;
+    --cyan: #39d2c0;
+  }
+
+  * { box-sizing: border-box; }
+
+  body {
+    margin: 0;
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
+    background: var(--bg);
+    color: var(--text);
+    line-height: 1.6;
+  }
+
+  header {
+    border-bottom: 1px solid var(--border);
+    padding: 56px 24px 36px;
+    text-align: center;
+  }
+
+  header h1 {
+    margin: 0 0 10px;
+    font-size: 2.7rem;
+    font-weight: 800;
+    color: var(--text);
+  }
+
+  header p {
+    max-width: 760px;
+    margin: 0 auto;
+    color: var(--text-muted);
+    font-size: 1.05rem;
+  }
+
+  main {
+    display: grid;
+    grid-template-columns: 250px minmax(0, 1fr);
+    gap: 32px;
+    max-width: 1180px;
+    margin: 0 auto;
+    padding: 36px 24px 56px;
+  }
+
+  nav {
+    position: sticky;
+    top: 18px;
+    align-self: start;
+    background: var(--surface);
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    padding: 16px;
+  }
+
+  nav strong {
+    display: block;
+    margin-bottom: 8px;
+    color: var(--text);
+  }
+
+  nav a {
+    display: block;
+    padding: 5px 0;
+    color: var(--text-muted);
+    text-decoration: none;
+    font-size: .92rem;
+  }
+
+  nav a:hover { color: var(--blue); }
+
+  section { margin-bottom: 44px; }
+
+  h2 {
+    display: inline-block;
+    margin: 0 0 18px;
+    padding-bottom: 8px;
+    border-bottom: 2px solid var(--blue);
+    font-size: 1.45rem;
+  }
+
+  h3 {
+    margin: 0 0 10px;
+    color: var(--cyan);
+    font-size: 1.08rem;
+  }
+
+  p, li { color: var(--text-muted); }
+
+  code {
+    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
+    background: var(--surface2);
+    border-radius: 4px;
+    padding: 2px 5px;
+    color: var(--cyan);
+    font-size: .9em;
+  }
+
+  pre {
+    margin: 12px 0;
+    padding: 14px;
+    overflow-x: auto;
+    background: var(--surface);
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    color: var(--text);
+  }
+
+  pre code {
+    padding: 0;
+    background: transparent;
+    color: inherit;
+  }
+
+  table {
+    width: 100%;
+    margin: 12px 0;
+    border-collapse: collapse;
+    font-size: .92rem;
+  }
+
+  th, td {
+    padding: 9px 10px;
+    border: 1px solid var(--border);
+    text-align: left;
+    vertical-align: top;
+  }
+
+  th {
+    background: var(--surface2);
+    color: var(--text);
+    font-weight: 600;
+  }
+
+  td { color: var(--text-muted); }
+
+  .meta-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
+    gap: 14px;
+    margin-bottom: 24px;
+  }
+
+  .panel, .endpoint {
+    background: var(--surface);
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    padding: 18px;
+  }
+
+  .panel h3 { color: var(--text); }
+  .panel ul { margin: 8px 0 0; padding-left: 20px; }
+
+  .endpoint {
+    margin-bottom: 16px;
+  }
+
+  .endpoint-header {
+    display: flex;
+    align-items: baseline;
+    gap: 10px;
+    flex-wrap: wrap;
+    margin-bottom: 8px;
+  }
+
+  .method {
+    display: inline-block;
+    min-width: 52px;
+    padding: 2px 8px;
+    border-radius: 4px;
+    text-align: center;
+    font-weight: 700;
+    font-size: .76rem;
+    letter-spacing: .02em;
+  }
+
+  .get { background: rgba(88, 166, 255, .16); color: var(--blue); border: 1px solid rgba(88, 166, 255, .35); }
+  .post { background: rgba(63, 185, 80, .16); color: var(--green); border: 1px solid rgba(63, 185, 80, .35); }
+  .multi { background: rgba(210, 153, 34, .16); color: var(--orange); border: 1px solid rgba(210, 153, 34, .35); }
+
+  .path {
+    color: var(--text);
+    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
+    font-weight: 650;
+    overflow-wrap: anywhere;
+  }
+
+  .note {
+    margin-top: 12px;
+    padding: 10px 12px;
+    border-left: 3px solid var(--orange);
+    background: rgba(210, 153, 34, .08);
+    color: var(--text-muted);
+  }
+
+  .danger {
+    border-left-color: var(--red);
+    background: rgba(248, 81, 73, .08);
+  }
+
+  .callers {
+    margin: 10px 0 0;
+    padding-left: 20px;
+  }
+
+  .callers li { margin: 2px 0; }
+
+  @media (max-width: 820px) {
+    main { grid-template-columns: 1fr; }
+    nav { position: static; }
+    header h1 { font-size: 2.1rem; }
+  }
+</style>
+</head>
+<body>
+<header>
+  <h1>Zordon API Reference</h1>
+  <p>Flask endpoints exposed by <code>src/api/api_server.py</code>, with the in-repo client wrapper in <code>src/api/server_proxy.py</code>.</p>
+</header>
+
+<main>
+  <nav aria-label="API sections">
+    <strong>Sections</strong>
+    <a href="#overview">Overview</a>
+    <a href="#jobs">Jobs</a>
+    <a href="#job-lifecycle">Job Lifecycle</a>
+    <a href="#status">Status and Environment</a>
+    <a href="#engines">Engines</a>
+    <a href="#debug">Debug</a>
+    <a href="#cleanup">Cleanup Review</a>
+  </nav>
+
+  <div>
+    <section id="overview">
+      <h2>Overview</h2>
+      <div class="meta-grid">
+        <div class="panel">
+          <h3>Versioning</h3>
+          <ul>
+            <li>Current API version: <code>0.1</code></li>
+            <li><code>RenderServerProxy.request()</code> sends <code>X-API-Version</code>.</li>
+            <li>The server does not currently validate that header.</li>
+          </ul>
+        </div>
+        <div class="panel">
+          <h3>Response Conventions</h3>
+          <ul>
+            <li>JSON endpoints return Flask-serialized dictionaries or lists.</li>
+            <li>File endpoints return <code>send_file()</code> responses.</li>
+            <li>Most errors are plain text with <code>400</code>, <code>404</code>, <code>500</code>, or <code>503</code>.</li>
+            <li><code>JobNotFoundError</code> maps to HTTP <code>400</code>.</li>
+          </ul>
+        </div>
+      </div>
+    </section>
+
+    <section id="jobs">
+      <h2>Jobs</h2>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs</span></div>
+        <p>Returns all render jobs and a cache token.</p>
+        <pre><code>{
+  "jobs": [{"id": "job-id", "name": "job name", "status": "running"}],
+  "token": "cache-token"
+}</code></pre>
+        <p>Known callers:</p>
+        <ul class="callers">
+          <li><code>RenderServerProxy.get_jobs()</code></li>
+          <li><code>src/ui/main_window.py</code></li>
+        </ul>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/long_poll</span></div>
+        <p>Long-polls the job list until the supplied cache token changes or 30 seconds elapse.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>token</code></td><td>No</td><td>Cache token returned by <code>/api/jobs</code>.</td></tr>
+        </table>
+        <p>Returns <code>200</code> with job data when changed, or <code>204</code> when no change arrives before timeout.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/status/&lt;status_val&gt;</span></div>
+        <p>Returns jobs matching a render status converted by <code>string_to_status()</code>.</p>
+        <div class="note">No <code>RenderServerProxy</code> wrapper or in-repo caller was found.</div>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/&lt;job_id&gt;</span></div>
+        <p>Returns one job as JSON.</p>
+        <p>Known callers include <code>RenderServerProxy.get_job()</code>, <code>add_job.py</code>, <code>src/ui/main_window.py</code>, <code>src/distributed_job_manager.py</code>, and <code>tests/job_creation_tests.py</code>.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/&lt;job_id&gt;/logs</span></div>
+        <p>Returns the job log file as <code>text/plain</code>. The main window opens this URL directly.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/&lt;job_id&gt;/files</span></div>
+        <p>Returns a list of output filenames for the job.</p>
+        <p>Known callers: <code>RenderServerProxy.get_job_files()</code> and <code>src/utilities/server_helper.py</code>.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/&lt;job_id&gt;/download</span></div>
+        <p>Downloads one output file.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>filename</code></td><td>Yes</td><td>Case-insensitive filename from the job file list.</td></tr>
+        </table>
+        <p>Returns <code>200</code> with an attachment, <code>400</code> when <code>filename</code> is missing, or <code>404</code> when the file is not found.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/&lt;job_id&gt;/download_all</span></div>
+        <p>Creates a temporary zip of the job output directory and downloads it.</p>
+        <p>Known callers: <code>RenderServerProxy.download_all_job_files()</code>, <code>src/ui/main_window.py</code>, and <code>src/utilities/server_helper.py</code>.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/jobs/&lt;job_id&gt;/thumbnail</span></div>
+        <p>Returns a generated preview image or video for a job.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>size</code></td><td>No</td><td><code>big</code> is parsed but not currently applied.</td></tr>
+          <tr><td><code>video_ok</code></td><td>No</td><td>If truthy and a video preview exists, video can be returned.</td></tr>
+        </table>
+        <div class="note">Cleanup note: <code>size=big</code> is parsed into <code>big_thumb</code> but not used.</div>
+      </article>
+    </section>
+
+    <section id="job-lifecycle">
+      <h2>Job Lifecycle</h2>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method post">POST</span><span class="path">/api/jobs</span></div>
+        <p>Adds one or more render jobs. Accepts either a JSON request body or multipart form data with a <code>json</code> field and optional <code>file</code> upload.</p>
+        <table>
+          <tr><th>Common Field</th><th>Description</th></tr>
+          <tr><td><code>name</code></td><td>Display name for the render job.</td></tr>
+          <tr><td><code>renderer</code></td><td>Render engine name such as <code>blender</code> or <code>ffmpeg</code>.</td></tr>
+          <tr><td><code>start_frame</code></td><td>First frame to render.</td></tr>
+          <tr><td><code>end_frame</code></td><td>Last frame to render.</td></tr>
+          <tr><td><code>args</code></td><td>Engine-specific render arguments.</td></tr>
+          <tr><td><code>enable_split_jobs</code></td><td>Whether distributed subjobs may be created.</td></tr>
+          <tr><td><code>child_jobs</code></td><td>Optional subjob definitions.</td></tr>
+          <tr><td><code>local_path</code></td><td>Local file path used when posting to localhost.</td></tr>
+        </table>
+        <p>Known callers include <code>RenderServerProxy.create_job()</code>, <code>add_job.py</code>, <code>src/ui/add_job_window.py</code>, <code>src/distributed_job_manager.py</code>, and integration tests.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method post">POST</span><span class="path">/api/jobs/&lt;job_id&gt;/cancel</span></div>
+        <p>Cancels a job. Requires a truthy <code>confirm</code> query parameter.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>confirm</code></td><td>Yes</td><td>Must be truthy or the request is rejected.</td></tr>
+          <tr><td><code>redirect</code></td><td>No</td><td>If truthy, redirects to <code>index</code>.</td></tr>
+        </table>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method post">POST</span><span class="path">/api/jobs/&lt;job_id&gt;/delete</span></div>
+        <p>Deletes a job, stops it first, deletes previews, and removes owned upload/output directories when safe.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>confirm</code></td><td>Yes</td><td>Must be truthy or the request is rejected.</td></tr>
+        </table>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method post">POST</span><span class="path">/api/jobs/&lt;job_id&gt;/subjob_update</span></div>
+        <p>Notifies a parent job that a child/subjob changed state. The request body is the JSON representation of the subjob.</p>
+      </article>
+    </section>
+
+    <section id="status">
+      <h2>Status and Environment</h2>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/heartbeat</span></div>
+        <p>Returns the current timestamp as plain text. Used by <code>RenderServerProxy.check_connection()</code>.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/status</span></div>
+        <p>Returns local system and queue status, including operating system, CPU, memory, job counts, hostname, port, app version, and API version.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/presets</span></div>
+        <p>Returns <code>config/presets.yaml</code>.</p>
+        <div class="note">No in-repo callers were found.</div>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/cpu_benchmark</span></div>
+        <p>Runs a CPU benchmark for 10 seconds and returns the score as plain text. Used by <code>src/utilities/server_helper.py</code>.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/disk_benchmark</span></div>
+        <p>Runs a disk I/O benchmark and returns write/read speeds.</p>
+        <div class="note">No in-repo callers were found.</div>
+      </article>
+    </section>
+
+    <section id="engines">
+      <h2>Engines</h2>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/for_filename</span></div>
+        <p>Returns the engine name suitable for a project filename.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>filename</code></td><td>Yes</td><td>Project filename or path. The client currently sends only the basename.</td></tr>
+        </table>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines</span></div>
+        <p>Returns installed engine data keyed by engine name.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>response_type</code></td><td>No</td><td><code>standard</code> or <code>full</code>; defaults to <code>standard</code>.</td></tr>
+        </table>
+        <p><code>full</code> responses include supported extensions, supported export formats, system info, and UI options.</p>
+        <p>Known callers: <code>RenderServerProxy.get_engines()</code>, <code>src/ui/settings_window.py</code>, and <code>src/ui/engine_browser.py</code>.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/names</span></div>
+        <p>Returns installed engine names as a list without instantiating engine classes. Use this for lightweight selection UIs that only need engine names.</p>
+        <p>Known callers: <code>RenderServerProxy.get_engine_names()</code> and <code>src/ui/add_job_window.py</code>.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/&lt;engine_name&gt;</span></div>
+        <p>Returns installed version data for a single engine.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>response_type</code></td><td>No</td><td><code>standard</code> or <code>full</code>; defaults to <code>standard</code>.</td></tr>
+        </table>
+        <p><code>full</code> responses include supported extensions, supported export formats, system info, and UI options.</p>
+        <p>Known caller: <code>RenderServerProxy.get_engine()</code> in the add-job window.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/&lt;engine_name&gt;/availability</span></div>
+        <p>Returns whether an engine can accept jobs on this server, plus CPU count, installed versions, and hostname.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/&lt;engine_name&gt;/args</span></div>
+        <p>Returns engine arguments.</p>
+        <div class="note">No in-repo callers were found.</div>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/&lt;engine_name&gt;/help</span></div>
+        <p>Returns engine help text. The add-job window opens this URL directly.</p>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/download_available</span></div>
+        <p>Checks whether a managed engine version is available to download.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>engine</code></td><td>Yes</td><td>Engine name.</td></tr>
+          <tr><td><code>version</code></td><td>Yes</td><td>Engine version.</td></tr>
+          <tr><td><code>system_os</code></td><td>No</td><td>Target OS.</td></tr>
+          <tr><td><code>cpu</code></td><td>No</td><td>Target CPU architecture.</td></tr>
+        </table>
+        <div class="note">No in-repo callers were found.</div>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/engines/most_recent_version</span></div>
+        <p>Finds the most recent downloadable version for an engine.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>engine</code></td><td>Yes</td><td>Engine name.</td></tr>
+          <tr><td><code>system_os</code></td><td>No</td><td>Target OS.</td></tr>
+          <tr><td><code>cpu</code></td><td>No</td><td>Target CPU architecture.</td></tr>
+        </table>
+        <div class="note">No in-repo callers were found.</div>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method post">POST</span><span class="path">/api/engines/download</span></div>
+        <p>Downloads a managed engine version.</p>
+        <table>
+          <tr><th>Query Parameter</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>engine</code></td><td>Yes</td><td>Engine name.</td></tr>
+          <tr><td><code>version</code></td><td>Yes</td><td>Engine version.</td></tr>
+          <tr><td><code>system_os</code></td><td>No</td><td>Target OS.</td></tr>
+          <tr><td><code>cpu</code></td><td>No</td><td>Target CPU architecture.</td></tr>
+        </table>
+        <div class="note">Settings currently calls <code>EngineManager.download_engine()</code> directly instead of this API route.</div>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method post">POST</span><span class="path">/api/engines/delete</span></div>
+        <p>Deletes a managed engine download.</p>
+        <table>
+          <tr><th>JSON Field</th><th>Required</th><th>Description</th></tr>
+          <tr><td><code>engine</code></td><td>Yes</td><td>Engine name.</td></tr>
+          <tr><td><code>version</code></td><td>Yes</td><td>Engine version.</td></tr>
+          <tr><td><code>system_os</code></td><td>No</td><td>Target OS.</td></tr>
+          <tr><td><code>cpu</code></td><td>No</td><td>Target CPU architecture.</td></tr>
+        </table>
+      </article>
+    </section>
+
+    <section id="debug">
+      <h2>Debug</h2>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method get">GET</span><span class="path">/api/_debug/detected_clients</span></div>
+        <p>Returns hostnames detected by Zeroconf.</p>
+        <div class="note">Development/debug only, with an inline comment saying it probably should not ship.</div>
+      </article>
+
+      <article class="endpoint">
+        <div class="endpoint-header"><span class="method post">POST</span><span class="path">/api/_debug/clear_history</span></div>
+        <p>Clears render queue history and returns <code>success</code>.</p>
+        <div class="note">Development/debug only.</div>
+      </article>
+    </section>
+
+    <section id="cleanup">
+      <h2>Cleanup Review</h2>
+      <div class="panel">
+        <h3>Routes With No In-Repo Callers Found</h3>
+        <ul>
+          <li><code>GET /api/jobs/status/&lt;status_val&gt;</code></li>
+          <li><code>GET /api/presets</code></li>
+          <li><code>GET /api/disk_benchmark</code></li>
+          <li><code>GET /api/engines/&lt;engine_name&gt;/args</code></li>
+          <li><code>GET /api/engines/download_available</code></li>
+          <li><code>GET /api/engines/most_recent_version</code></li>
+          <li><code>POST /api/engines/download</code></li>
+          <li><code>GET /api/_debug/detected_clients</code></li>
+          <li><code>POST /api/_debug/clear_history</code></li>
+        </ul>
+      </div>
+
+      <div class="panel" style="margin-top: 14px;">
+        <h3>Cleanup Risks</h3>
+        <ul>
+          <li><code>job_thumbnail()</code> parses <code>size=big</code> but never uses the resulting <code>big_thumb</code> value.</li>
+        </ul>
+      </div>
+    </section>
+  </div>
+</main>
+</body>
+</html>

main.py

@@ -1,6 +0,0 @@
-#!/usr/bin/env python3
-from src import init
-
-if __name__ == '__main__':
-    import sys
-    sys.exit(init.run())

pytest.ini

@@ -0,0 +1,4 @@
+[pytest]
+norecursedirs = src/engines/aerender .git build dist *.egg venv .venv env .env __pycache__ .pytest_cache
+testpaths = tests
+python_files = test_*.py job_creation_tests.py

requirements.txt

@@ -1,15 +1,20 @@
-requests==2.31.0
+PyQt6>=6.7.0
-psutil==5.9.6
+psutil>=5.9.8
-PyYAML==6.0.1
+requests>=2.32.2
-Flask==3.0.0
+Pillow>=10.3.0
-rich==13.6.0
+PyYAML>=6.0.1
-Werkzeug~=3.0.1
+flask>=3.0.3
-json2html~=1.3.0
+tqdm>=4.66.4
-SQLAlchemy~=2.0.15
+werkzeug>=3.0.3
-Pillow==10.1.0
+Pypubsub>=4.0.3
-zeroconf==0.119.0
+zeroconf>=0.132.2
-Pypubsub~=4.0.3
+SQLAlchemy>=2.0.30
-tqdm==4.66.1
+plyer>=2.1.0
-plyer==2.1.0
+rich>=13.7.1
-PyQt6~=6.6.0
+setuptools>=70.0.0
-PySide6~=6.6.0
+py-cpuinfo>=9.0.0
+requests-toolbelt>=1.0.0
+PyQt6-sip>=13.6.0
+humanize>=4.12.1
+macholib>=1.16.3
+altgraph>=0.17.4

server.py

@@ -1,5 +1,155 @@
-#!/usr/bin/env python3
+import logging
-from src.api.api_server import start_server
+import multiprocessing
+import os
+import socket
+import threading
+from pathlib import Path
+
+import psutil
+
+from src.api.api_server import API_VERSION
+from src.api.api_server import start_api_server
+from src.api.preview_manager import PreviewManager
+from src.api.serverproxy_manager import ServerProxyManager
+from src.application_context import ApplicationContext
+from src.distributed_job_manager import DistributedJobManager
+from src.engines.engine_manager import EngineManager
+from src.render_queue import RenderQueue
+from src.utilities.config import Config
+from src.utilities.misc_helper import (get_gpu_info, current_system_cpu, current_system_os,
+                                       current_system_os_version, current_system_cpu_brand)
+from src.utilities.zeroconf_server import ZeroconfServer
+from src.version import APP_NAME, APP_VERSION
+
+logger = logging.getLogger()
+
+
+class ZordonServer:
+
+    def __init__(self):
+        self.ctx = ApplicationContext()
+
+        # setup logging
+        logging.basicConfig(format='%(asctime)s: %(levelname)s: %(module)s: %(message)s', datefmt='%d-%b-%y %H:%M:%S',
+                            level=Config.server_log_level.upper())
+        logging.getLogger("requests").setLevel(logging.WARNING)  # suppress noisy requests/urllib3 logging
+        logging.getLogger("urllib3").setLevel(logging.WARNING)
+
+        # ---- Bootstrap Config ----
+        Config.setup_config_dir()
+        config_path = Path(Config.config_dir()) / "config.yaml"
+        self.ctx.config = Config()
+        self.ctx.config.load(config_path)
+        Config._default_instance = self.ctx.config
+        Config._sync_class()
+
+        # ---- Engine Manager ----
+        self.ctx.engine_manager = EngineManager()
+        self.ctx.engine_manager.engines_path = Path(Config.upload_folder).expanduser() / "engines"
+        os.makedirs(self.ctx.engine_manager.engines_path, exist_ok=True)
+        EngineManager._default_instance = self.ctx.engine_manager
+        EngineManager._sync_class()
+
+        # ---- Preview Manager ----
+        self.ctx.preview_manager = PreviewManager()
+        self.ctx.preview_manager.storage_path = Path(Config.upload_folder).expanduser() / "previews"
+        PreviewManager._default_instance = self.ctx.preview_manager
+        PreviewManager._sync_class()
+
+        # ---- Render Queue ----
+        self.ctx.render_queue = RenderQueue()
+        RenderQueue._default_instance = self.ctx.render_queue
+        RenderQueue._sync_class()
+        RenderQueue.load_state(database_directory=Path(Config.upload_folder).expanduser())
+
+        # ---- Distributed Job Manager ----
+        self.ctx.distributed_job_manager = DistributedJobManager()
+        DistributedJobManager._default_instance = self.ctx.distributed_job_manager
+        DistributedJobManager._sync_class()
+        DistributedJobManager.subscribe_to_listener()
+
+        self.api_server = None
+        self.server_hostname: str = socket.gethostname()
+
+    def start_server(self):
+
+        def existing_process(process_name):
+            current_pid = os.getpid()
+            current_process = psutil.Process(current_pid)
+            for proc in psutil.process_iter(['pid', 'name', 'ppid']):
+                proc_name = proc.info['name'].lower().rstrip('.exe')
+                if proc_name == process_name.lower() and proc.info['pid'] != current_pid:
+                    if proc.info['pid'] == current_process.ppid():
+                        continue  # parent process
+                    elif proc.info['ppid'] == current_pid:
+                        continue  # child process
+                    else:
+                        return proc  # unrelated process
+            return None
+
+        # check for existing instance
+        existing_proc = existing_process(APP_NAME)
+        if existing_proc:
+            err_msg = f"Another instance of {APP_NAME} is already running (pid: {existing_proc.pid})"
+            logger.fatal(err_msg)
+            raise ProcessLookupError(err_msg)
+
+        # main start
+        logger.info(f"Starting {APP_NAME} Render Server ({APP_VERSION})")
+        logger.debug(f"Upload directory: {Path(Config.upload_folder).expanduser()}")
+        logger.debug(f"Thumbs directory: {PreviewManager.storage_path}")
+        logger.debug(f"Engines directory: {EngineManager.engines_path}")
+
+        ServerProxyManager.subscribe_to_listener()
+
+        # update hostname
+        self.server_hostname = socket.gethostname()
+
+        # configure and start API server
+        self.api_server = threading.Thread(target=start_api_server, args=(self.server_hostname,))
+        self.api_server.daemon = True
+        self.api_server.start()
+
+        # start zeroconf server
+        ctx = self.ctx
+        ctx.zeroconf_server = ZeroconfServer()
+        ctx.zeroconf_server._configure(f"_{APP_NAME.lower()}._tcp.local.", self.server_hostname, Config.port_number)
+        ctx.zeroconf_server.properties = {'system_cpu': current_system_cpu(),
+                                          'system_cpu_brand': current_system_cpu_brand(),
+                                          'system_cpu_cores': multiprocessing.cpu_count(),
+                                          'system_os': current_system_os(),
+                                          'system_os_version': current_system_os_version(),
+                                          'system_memory': round(psutil.virtual_memory().total / (1024**3)),
+                                          'gpu_info': get_gpu_info(),
+                                          'api_version': API_VERSION}
+        ZeroconfServer._default_instance = ctx.zeroconf_server
+        ZeroconfServer._sync_class()
+        ctx.zeroconf_server._start()
+
+        logger.info(f"{APP_NAME} Render Server started - Hostname: {self.server_hostname}")
+        RenderQueue.start()  # Start evaluating the render queue
+
+    def is_running(self):
+        return self.api_server and self.api_server.is_alive()
+
+    def stop_server(self):
+        logger.info(f"{APP_NAME} Render Server is preparing to stop")
+        try:
+            ZeroconfServer.stop()
+            RenderQueue.prepare_for_shutdown()
+        except Exception as e:
+            logger.exception(f"Exception during prepare for shutdown: {e}")
+        logger.info(f"{APP_NAME} Render Server has shut down")
+
 
 if __name__ == '__main__':
-    start_server()
+    server = ZordonServer()
+    try:
+        server.start_server()
+        server.api_server.join()
+    except KeyboardInterrupt:
+        pass
+    except Exception as e:
+        logger.fatal(f"Unhandled exception: {e}")
+    finally:
+        server.stop_server()

server.spec

@@ -0,0 +1,158 @@
+# -*- mode: python ; coding: utf-8 -*-
+
+from PyInstaller.utils.hooks import collect_all
+from pathlib import Path
+import os
+import sys
+import platform
+
+# ------------------------------------------------------------
+# Project paths
+# ------------------------------------------------------------
+
+project_root = Path(SPECPATH).resolve()
+src_dir = project_root / "src"
+
+# Ensure `src.*` imports work during analysis
+sys.path.insert(0, str(project_root))
+
+# ------------------------------------------------------------
+# Import version info
+# ------------------------------------------------------------
+
+from src.version import APP_NAME, APP_VERSION, APP_AUTHOR
+
+APP_NAME = f"{APP_NAME}-server"
+
+# ------------------------------------------------------------
+# PyInstaller data / imports
+# ------------------------------------------------------------
+
+datas = [
+	("resources", "resources"),
+	("src/engines/blender/scripts", "src/engines/blender/scripts"),
+]
+
+binaries = []
+hiddenimports = ["zeroconf", "src.version"]
+
+tmp_ret = collect_all("zeroconf")
+datas += tmp_ret[0]
+binaries += tmp_ret[1]
+hiddenimports += tmp_ret[2]
+
+# ------------------------------------------------------------
+# Analysis
+# ------------------------------------------------------------
+
+a = Analysis(
+	["server.py"],
+	pathex=[str(project_root)],
+	binaries=binaries,
+	datas=datas,
+	hiddenimports=hiddenimports,
+	hookspath=[],
+	hooksconfig={},
+	runtime_hooks=[],
+	excludes=[],
+	noarchive=False,
+	optimize=1,  # optimize=2 breaks Windows builds
+)
+
+pyz = PYZ(a.pure)
+
+# ------------------------------------------------------------
+# Platform targets
+# ------------------------------------------------------------
+
+if platform.system() == "Darwin":  # macOS
+
+	exe = EXE(
+		pyz,
+		a.scripts,
+		[],
+		exclude_binaries=True,
+		name=APP_NAME,
+		debug=False,
+		bootloader_ignore_signals=False,
+		strip=True,
+		upx=True,
+		console=False,
+		disable_windowed_traceback=False,
+		argv_emulation=False,
+		target_arch=None,
+		codesign_identity=None,
+		entitlements_file=None,
+	)
+
+	app = BUNDLE(
+		exe,
+		a.binaries,
+		a.datas,
+		strip=True,
+		name=f"{APP_NAME}.app",
+		icon="resources/Server.png",
+		bundle_identifier=None,
+		version=APP_VERSION,
+	)
+
+elif platform.system() == "Windows":
+
+	import pyinstaller_versionfile
+	import tempfile
+
+	version_file_path = os.path.join(
+		tempfile.gettempdir(), "versionfile.txt"
+	)
+
+	pyinstaller_versionfile.create_versionfile(
+		output_file=version_file_path,
+		version=APP_VERSION,
+		company_name=APP_AUTHOR,
+		file_description=APP_NAME,
+		internal_name=APP_NAME,
+		legal_copyright=f"© {APP_AUTHOR}",
+		original_filename=f"{APP_NAME}.exe",
+		product_name=APP_NAME,
+	)
+
+	exe = EXE(
+		pyz,
+		a.scripts,
+		a.binaries,
+		a.datas,
+		[],
+		name=APP_NAME,
+		debug=False,
+		bootloader_ignore_signals=False,
+		strip=True,
+		upx=True,
+		console=False,
+		disable_windowed_traceback=False,
+		argv_emulation=False,
+		target_arch=None,
+		codesign_identity=None,
+		entitlements_file=None,
+		version=version_file_path,
+	)
+
+else:  # Linux
+
+	exe = EXE(
+		pyz,
+		a.scripts,
+		a.binaries,
+		a.datas,
+		[],
+		name=APP_NAME,
+		debug=False,
+		bootloader_ignore_signals=False,
+		strip=True,
+		upx=True,
+		console=False,
+		disable_windowed_traceback=False,
+		argv_emulation=False,
+		target_arch=None,
+		codesign_identity=None,
+		entitlements_file=None,
+	)

src/api/add_job_helpers.py

@@ -1,179 +0,0 @@
-#!/usr/bin/env python3
-import logging
-import os
-import shutil
-import tempfile
-import zipfile
-from datetime import datetime
-
-import requests
-from tqdm import tqdm
-from werkzeug.utils import secure_filename
-
-from src.distributed_job_manager import DistributedJobManager
-from src.engines.engine_manager import EngineManager
-from src.render_queue import RenderQueue
-
-logger = logging.getLogger()
-
-
-def handle_uploaded_project_files(request, jobs_list, upload_directory):
-    # Initialize default values
-    loaded_project_local_path = None
-
-    uploaded_project = request.files.get('file', None)
-    project_url = jobs_list[0].get('url', None)
-    local_path = jobs_list[0].get('local_path', None)
-    renderer = jobs_list[0].get('renderer')
-    downloaded_file_url = None
-
-    if uploaded_project and uploaded_project.filename:
-        referred_name = os.path.basename(uploaded_project.filename)
-    elif project_url:
-        referred_name, downloaded_file_url = download_project_from_url(project_url)
-        if not referred_name:
-            raise ValueError(f"Error downloading file from URL: {project_url}")
-    elif local_path and os.path.exists(local_path):
-        referred_name = os.path.basename(local_path)
-
-    else:
-        raise ValueError("Cannot find any valid project paths")
-
-    # Prepare the local filepath
-    cleaned_path_name = os.path.splitext(referred_name)[0].replace(' ', '_')
-    job_dir = os.path.join(upload_directory, '-'.join(
-        [datetime.now().strftime("%Y.%m.%d_%H.%M.%S"), renderer, cleaned_path_name]))
-    os.makedirs(job_dir, exist_ok=True)
-    project_source_dir = os.path.join(job_dir, 'source')
-    os.makedirs(project_source_dir, exist_ok=True)
-
-    # Move projects to their work directories
-    if uploaded_project and uploaded_project.filename:
-        loaded_project_local_path = os.path.join(project_source_dir, secure_filename(uploaded_project.filename))
-        uploaded_project.save(loaded_project_local_path)
-        logger.info(f"Transfer complete for {loaded_project_local_path.split(upload_directory)[-1]}")
-    elif project_url:
-        loaded_project_local_path = os.path.join(project_source_dir, referred_name)
-        shutil.move(downloaded_file_url, loaded_project_local_path)
-        logger.info(f"Download complete for {loaded_project_local_path.split(upload_directory)[-1]}")
-    elif local_path:
-        loaded_project_local_path = os.path.join(project_source_dir, referred_name)
-        shutil.copy(local_path, loaded_project_local_path)
-        logger.info(f"Import complete for {loaded_project_local_path.split(upload_directory)[-1]}")
-
-    return loaded_project_local_path, referred_name
-
-
-def download_project_from_url(project_url):
-    # This nested function is to handle downloading from a URL
-    logger.info(f"Downloading project from url: {project_url}")
-    referred_name = os.path.basename(project_url)
-    downloaded_file_url = None
-
-    try:
-        response = requests.get(project_url, stream=True)
-        if response.status_code == 200:
-            # Get the total file size from the "Content-Length" header
-            file_size = int(response.headers.get("Content-Length", 0))
-            # Create a progress bar using tqdm
-            progress_bar = tqdm(total=file_size, unit="B", unit_scale=True)
-            # Open a file for writing in binary mode
-            downloaded_file_url = os.path.join(tempfile.gettempdir(), referred_name)
-            with open(downloaded_file_url, "wb") as file:
-                for chunk in response.iter_content(chunk_size=1024):
-                    if chunk:
-                        # Write the chunk to the file
-                        file.write(chunk)
-                        # Update the progress bar
-                        progress_bar.update(len(chunk))
-            # Close the progress bar
-            progress_bar.close()
-            return referred_name, downloaded_file_url
-    except Exception as e:
-        logger.error(f"Error downloading file: {e}")
-    return None, None
-
-
-def process_zipped_project(zip_path):
-    # Given a zip path, extract its content, and return the main project file path
-    work_path = os.path.dirname(zip_path)
-
-    try:
-        with zipfile.ZipFile(zip_path, 'r') as myzip:
-            myzip.extractall(work_path)
-
-        project_files = [x for x in os.listdir(work_path) if os.path.isfile(os.path.join(work_path, x))]
-        project_files = [x for x in project_files if '.zip' not in x]
-
-        logger.debug(f"Zip files: {project_files}")
-
-        # supported_exts = RenderWorkerFactory.class_for_name(renderer).engine.supported_extensions
-        # if supported_exts:
-        #     project_files = [file for file in project_files if any(file.endswith(ext) for ext in supported_exts)]
-
-        # If there's more than 1 project file or none, raise an error
-        if len(project_files) != 1:
-            raise ValueError(f'Cannot find a valid project file in {os.path.basename(zip_path)}')
-
-        extracted_project_path = os.path.join(work_path, project_files[0])
-        logger.info(f"Extracted zip file to {extracted_project_path}")
-
-    except (zipfile.BadZipFile, zipfile.LargeZipFile) as e:
-        logger.error(f"Error processing zip file: {e}")
-        raise ValueError(f"Error processing zip file: {e}")
-    return extracted_project_path
-
-
-def create_render_jobs(jobs_list, loaded_project_local_path, job_dir):
-    results = []
-
-    for job_data in jobs_list:
-        try:
-            # get new output path in output_dir
-            output_path = job_data.get('output_path')
-            if not output_path:
-                loaded_project_filename = os.path.basename(loaded_project_local_path)
-                output_filename = os.path.splitext(loaded_project_filename)[0]
-            else:
-                output_filename = os.path.basename(output_path)
-
-            # Prepare output path
-            output_dir = os.path.join(os.path.dirname(os.path.dirname(loaded_project_local_path)), 'output')
-            output_path = os.path.join(output_dir, output_filename)
-            os.makedirs(output_dir, exist_ok=True)
-            logger.debug(f"New job output path: {output_path}")
-
-            # create & configure jobs
-            worker = EngineManager.create_worker(renderer=job_data['renderer'],
-                                                 input_path=loaded_project_local_path,
-                                                 output_path=output_path,
-                                                 engine_version=job_data.get('engine_version'),
-                                                 args=job_data.get('args', {}))
-            worker.status = job_data.get("initial_status", worker.status)
-            worker.parent = job_data.get("parent", worker.parent)
-            worker.name = job_data.get("name", worker.name)
-            worker.priority = int(job_data.get('priority', worker.priority))
-            worker.start_frame = int(job_data.get("start_frame", worker.start_frame))
-            worker.end_frame = int(job_data.get("end_frame", worker.end_frame))
-
-            # determine if we can / should split the job
-            if job_data.get("enable_split_jobs", False) and (worker.total_frames > 1) and not worker.parent:
-                DistributedJobManager.split_into_subjobs(worker, job_data, loaded_project_local_path)
-            else:
-                logger.debug("Not splitting into subjobs")
-
-            RenderQueue.add_to_render_queue(worker, force_start=job_data.get('force_start', False))
-            if not worker.parent:
-                from src.api.api_server import make_job_ready
-                make_job_ready(worker.id)
-            results.append(worker.json())
-        except FileNotFoundError as e:
-            err_msg = f"Cannot create job: {e}"
-            logger.error(err_msg)
-            results.append({'error': err_msg})
-        except Exception as e:
-            err_msg = f"Exception creating render job: {e}"
-            logger.exception(err_msg)
-            results.append({'error': err_msg})
-
-    return results

src/api/job_import_handler.py

@@ -0,0 +1,222 @@
+#!/usr/bin/env python3
+import logging
+import os
+import shutil
+import tempfile
+import zipfile
+from datetime import datetime
+from pathlib import Path
+
+import requests
+from tqdm import tqdm
+from werkzeug.utils import secure_filename
+
+from src.distributed_job_manager import DistributedJobManager
+
+logger = logging.getLogger()
+
+
+class JobImportHandler:
+    """Handles job import operations for rendering projects.
+
+    This class provides functionality to validate, download, and process
+    job data and project files for the rendering queue system.
+    """
+
+    @classmethod
+    def create_jobs_from_processed_data(cls, processed_job_data: dict) -> list[dict]:
+        """ Takes processed job data and creates new jobs
+
+        Args: processed_job_data: Dictionary containing job information"""
+        loaded_project_local_path = processed_job_data['__loaded_project_local_path']
+
+        # prepare child job data
+        job_data_to_create = []
+        if processed_job_data.get("child_jobs"):
+            for child_job_diffs in processed_job_data["child_jobs"]:
+                processed_child_job_data = processed_job_data.copy()
+                processed_child_job_data.pop("child_jobs")
+                processed_child_job_data.update(child_job_diffs)
+                processed_child_job_data['__use_output_subdir'] = True
+                job_data_to_create.append(processed_child_job_data)
+        else:
+            job_data_to_create.append(processed_job_data)
+
+        # create the jobs
+        created_jobs = []
+        for job_data in job_data_to_create:
+            new_job = DistributedJobManager.create_render_job(job_data, loaded_project_local_path)
+            created_jobs.append(new_job)
+
+        # Save notes to .txt
+        if processed_job_data.get("notes"):
+            parent_dir = Path(loaded_project_local_path).parent.parent
+            notes_name = processed_job_data['name'] + "-notes.txt"
+            with (Path(parent_dir) / notes_name).open("w") as f:
+                f.write(processed_job_data["notes"])
+        return [x.json() for x in created_jobs]
+
+    @classmethod
+    def validate_job_data(cls, new_job_data: dict, upload_directory: Path, uploaded_file=None) -> dict:
+        """Validates and prepares job data for import.
+
+        This method validates the job data dictionary, handles project file
+        acquisition (upload, download, or local copy), and prepares the job
+        directory structure.
+
+        Args:
+            new_job_data: Dictionary containing job information including
+                'name', 'engine_name', and optionally 'url' or 'local_path'.
+            upload_directory: Base directory for storing uploaded jobs.
+            uploaded_file: Optional uploaded file object from the request.
+
+        Returns:
+            The validated job data dictionary with additional metadata.
+
+        Raises:
+            KeyError: If required fields 'name' or 'engine_name' are missing.
+            FileNotFoundError: If no valid project file can be found.
+        """
+        loaded_project_local_path = None
+
+        # check for required keys
+        job_name = new_job_data.get('name')
+        engine_name = new_job_data.get('engine_name')
+        if not job_name:
+            raise KeyError("Missing job name")
+        if not engine_name:
+            raise KeyError("Missing engine name")
+
+        project_url = new_job_data.get('url', None)
+        local_path = new_job_data.get('local_path', None)
+        downloaded_file_url = None
+
+        if uploaded_file and uploaded_file.filename:
+            referred_name = os.path.basename(uploaded_file.filename)
+        elif project_url:
+            referred_name, downloaded_file_url = cls.download_project_from_url(project_url)
+            if not referred_name:
+                raise FileNotFoundError(f"Error downloading file from URL: {project_url}")
+        elif local_path and os.path.exists(local_path):
+            referred_name = os.path.basename(local_path)
+        else:
+            raise FileNotFoundError("Cannot find any valid project paths")
+
+        # Prepare the local filepath
+        cleaned_path_name = job_name.replace(' ', '-')
+        folder_name = f"{cleaned_path_name}-{engine_name}-{datetime.now().strftime('%Y.%m.%d_%H.%M.%S')}"
+        job_dir = Path(upload_directory) / folder_name
+        os.makedirs(job_dir, exist_ok=True)
+        project_source_dir = Path(job_dir) / 'source'
+        os.makedirs(project_source_dir, exist_ok=True)
+
+        # Move projects to their work directories
+        if uploaded_file and uploaded_file.filename:
+            # Handle file uploading
+            filename = secure_filename(uploaded_file.filename)
+            loaded_project_local_path = Path(project_source_dir) / filename
+            uploaded_file.save(str(loaded_project_local_path))
+            logger.info(f"Transfer complete for {loaded_project_local_path.relative_to(upload_directory)}")
+
+        elif project_url:
+            # Handle downloading project from a URL
+            loaded_project_local_path = Path(project_source_dir) / referred_name
+            shutil.move(str(downloaded_file_url), str(loaded_project_local_path))
+            logger.info(f"Download complete for {loaded_project_local_path.relative_to(upload_directory)}")
+
+        elif local_path:
+            # Handle local files
+            loaded_project_local_path = Path(project_source_dir) / referred_name
+            shutil.copy(str(local_path), str(loaded_project_local_path))
+            logger.info(f"Import complete for {loaded_project_local_path.relative_to(upload_directory)}")
+
+        if loaded_project_local_path.suffix == ".zip":
+            loaded_project_local_path = cls.process_zipped_project(loaded_project_local_path)
+
+        new_job_data["__loaded_project_local_path"] = loaded_project_local_path
+
+        return new_job_data
+
+    @staticmethod
+    def download_project_from_url(project_url: str):
+        """Downloads a project file from the given URL.
+
+        Downloads the file from the specified URL to a temporary directory
+        with progress tracking. Returns the filename and temporary path.
+
+        Args:
+            project_url: The URL to download the project file from.
+
+        Returns:
+            A tuple of (filename, temp_file_path) if successful,
+            (None, None) if download fails.
+        """
+        # This nested function is to handle downloading from a URL
+        logger.info(f"Downloading project from url: {project_url}")
+        referred_name = os.path.basename(project_url)
+
+        try:
+            response = requests.get(project_url, stream=True, timeout=300)
+            if response.status_code == 200:
+                # Get the total file size from the "Content-Length" header
+                file_size = int(response.headers.get("Content-Length", 0))
+                # Create a progress bar using tqdm
+                progress_bar = tqdm(total=file_size, unit="B", unit_scale=True)
+                # Open a file for writing in binary mode
+                downloaded_file_url = os.path.join(tempfile.gettempdir(), referred_name)
+                with open(downloaded_file_url, "wb") as file:
+                    for chunk in response.iter_content(chunk_size=1024):
+                        if chunk:
+                            # Write the chunk to the file
+                            file.write(chunk)
+                            # Update the progress bar
+                            progress_bar.update(len(chunk))
+                # Close the progress bar
+                progress_bar.close()
+                return referred_name, downloaded_file_url
+        except Exception as e:
+            logger.error(f"Error downloading file: {e}")
+        return None, None
+
+    @staticmethod
+    def process_zipped_project(zip_path: Path) -> Path:
+        """
+        Processes a zipped project.
+
+        This method takes a path to a zip file, extracts its contents, and returns the path to the extracted project
+        file. If the zip file contains more than one project file or none, an error is raised.
+
+        Args:
+            zip_path (Path): The path to the zip file.
+
+        Raises:
+            ValueError: If there's more than 1 project file or none in the zip file.
+
+        Returns:
+            Path: The path to the main project file.
+        """
+        work_path = zip_path.parent
+
+        try:
+            with zipfile.ZipFile(zip_path, 'r') as myzip:
+                myzip.extractall(str(work_path))
+
+            project_files = [p for p in work_path.iterdir() if p.is_file() and p.suffix.lower() != ".zip"]
+
+            logger.debug(f"Zip files: {project_files}")
+
+            # supported_exts = RenderWorkerFactory.class_for_name(engine).engine.supported_extensions
+            # if supported_exts:
+            #     project_files = [file for file in project_files if any(file.endswith(ext) for ext in supported_exts)]
+
+            # If there's more than 1 project file or none, raise an error
+            if len(project_files) != 1:
+                raise ValueError(f'Cannot find a valid project file in {zip_path.name}')
+
+            extracted_project_path = work_path / project_files[0]
+            logger.info(f"Extracted zip file to {extracted_project_path}")
+
+        except (zipfile.BadZipFile, zipfile.LargeZipFile) as e:
+            logger.error(f"Error processing zip file: {e}")
+            raise ValueError(f'Error processing zip file: {e}') from e
+        return extracted_project_path

src/api/preview_manager.py

@@ -0,0 +1,137 @@
+import logging
+import os
+import subprocess
+import threading
+from pathlib import Path
+from typing import Dict, Optional
+
+from src.utilities.ffmpeg_helper import generate_thumbnail, save_first_frame
+
+logger = logging.getLogger()
+supported_video_formats = ['.mp4', '.mov', '.avi', '.mpg', '.mpeg', '.mxf', '.m4v', '.mkv', '.webm']
+supported_image_formats = ['.jpg', '.png', '.exr', '.tif', '.tga', '.bmp', '.webp']
+
+
+class PreviewManager:
+    _default_instance: Optional['PreviewManager'] = None
+
+    storage_path: Optional[str] = None
+
+    def __init__(self) -> None:
+        self.storage_path = None
+        self._running_jobs: Dict = {}
+
+    @classmethod
+    def _sync_class(cls) -> None:
+        if cls._default_instance is not None:
+            cls.storage_path = cls._default_instance.storage_path
+
+    def _generate_job_preview_worker(self, job, replace_existing=False, max_width=480):
+
+        # Determine best source file to use for thumbs
+        job_file_list = job.file_list()
+        source_files = job_file_list if job_file_list else [job.input_path]
+        preview_label = "output" if job_file_list else "input"
+
+        # filter by type
+        found_image_files = [f for f in source_files if os.path.splitext(f)[-1].lower() in supported_image_formats]
+        found_video_files = [f for f in source_files if os.path.splitext(f)[-1].lower() in supported_video_formats]
+
+        # check if we even have any valid files to work from
+        if source_files and not found_video_files and not found_image_files:
+            logger.warning(f"No valid image or video files found in files from job: {job}")
+            return
+
+        os.makedirs(self.storage_path, exist_ok=True)
+        base_path = os.path.join(self.storage_path, f"{job.id}-{preview_label}-{max_width}")
+        preview_video_path = base_path + '.mp4'
+        preview_image_path = base_path + '.jpg'
+
+        if replace_existing:
+            for x in [preview_image_path, preview_video_path]:
+                try:
+                    os.remove(x)
+                except OSError:
+                    pass
+
+        # Generate image previews
+        if (found_video_files or found_image_files) and not os.path.exists(preview_image_path):
+            try:
+                path_of_source = found_image_files[-1] if found_image_files else found_video_files[-1]
+                logger.debug(f"Generating image preview for {path_of_source}")
+                save_first_frame(source_path=path_of_source, dest_path=preview_image_path, max_width=max_width)
+                logger.debug(f"Successfully created image preview for {path_of_source}")
+            except Exception as e:
+                logger.error(f"Error generating image preview for {job}: {e}")
+
+        # Generate video previews
+        if found_video_files and not os.path.exists(preview_video_path):
+            try:
+                path_of_source = found_video_files[0]
+                logger.debug(f"Generating video preview for {path_of_source}")
+                generate_thumbnail(source_path=path_of_source, dest_path=preview_video_path, max_width=max_width)
+                logger.debug(f"Successfully created video preview for {path_of_source}")
+            except subprocess.CalledProcessError as e:
+                logger.error(f"Error generating video preview for {job}: {e}")
+
+    def _update_previews_for_job(self, job, replace_existing=False, wait_until_completion=False, timeout=None):
+        job_thread = self._running_jobs.get(job.id)
+        if job_thread and job_thread.is_alive():
+            logger.debug(f'Preview generation job already running for {job}')
+        else:
+            job_thread = threading.Thread(target=self._generate_job_preview_worker, args=(job, replace_existing,))
+            job_thread.start()
+            self._running_jobs[job.id] = job_thread
+
+        if wait_until_completion:
+            job_thread.join(timeout=timeout)
+
+    def _get_previews_for_job(self, job):
+
+        results = {}
+        try:
+            directory_path = Path(self.storage_path)
+            preview_files_for_job = [f for f in directory_path.iterdir() if f.is_file() and f.name.startswith(job.id)]
+
+            for preview_filename in preview_files_for_job:
+                try:
+                    pixel_width = str(preview_filename).split('-')[-1]
+                    preview_label = str(os.path.basename(preview_filename)).split('-')[1]
+                    extension = os.path.splitext(preview_filename)[-1].lower()
+                    kind = 'video' if extension in supported_video_formats else \
+                        'image' if extension in supported_image_formats else 'unknown'
+                    results[preview_label] = results.get(preview_label, [])
+                    results[preview_label].append({'filename': str(preview_filename), 'width': pixel_width, 'kind': kind})
+                except IndexError:  # ignore invalid filenames
+                    pass
+        except FileNotFoundError:
+            pass
+        return results
+
+    def _delete_previews_for_job(self, job):
+        all_previews = self.get_previews_for_job(job)
+        flattened_list = [item for sublist in all_previews.values() for item in sublist]
+        for preview in flattened_list:
+            try:
+                logger.debug(f"Removing preview: {preview['filename']}")
+                os.remove(preview['filename'])
+            except OSError as e:
+                logger.error(f"Error removing preview '{preview.get('filename')}': {e}")
+
+    # --- Forwarders for backward compatibility ---
+
+    @classmethod
+    def update_previews_for_job(cls, job, replace_existing=False, wait_until_completion=False, timeout=None):
+        if cls._default_instance is not None:
+            cls._default_instance._update_previews_for_job(job, replace_existing, wait_until_completion, timeout)
+
+    @classmethod
+    def get_previews_for_job(cls, job):
+        if cls._default_instance is not None:
+            return cls._default_instance._get_previews_for_job(job)
+        return {}
+
+    @classmethod
+    def delete_previews_for_job(cls, job):
+        if cls._default_instance is not None:
+            cls._default_instance._delete_previews_for_job(job)

src/api/server_proxy.py

@@ -1,12 +1,13 @@
 import json
 import logging
 import os
-import socket
 import threading
 import time
+from pathlib import Path
 
 import requests
 from requests_toolbelt.multipart import MultipartEncoder, MultipartEncoderMonitor
+from urllib.parse import urljoin
 
 from src.utilities.misc_helper import is_localhost
 from src.utilities.status_utils import RenderStatus
@@ -16,14 +17,20 @@ status_colors = {RenderStatus.ERROR: "red", RenderStatus.CANCELLED: 'orange1', R
                  RenderStatus.RUNNING: 'cyan', RenderStatus.WAITING_FOR_SUBJOBS: 'blue'}
 
 categories = [RenderStatus.RUNNING, RenderStatus.WAITING_FOR_SUBJOBS, RenderStatus.ERROR, RenderStatus.NOT_STARTED,
-              RenderStatus.SCHEDULED, RenderStatus.COMPLETED, RenderStatus.CANCELLED, RenderStatus.UNDEFINED]
+              RenderStatus.SCHEDULED, RenderStatus.COMPLETED, RenderStatus.CANCELLED, RenderStatus.UNDEFINED,
+              RenderStatus.CONFIGURING]
 
 logger = logging.getLogger()
-OFFLINE_MAX = 2
+OFFLINE_MAX = 4
+JOB_UPLOAD_TIMEOUT = (10, 1800)
+FILE_DOWNLOAD_TIMEOUT = (10, 1800)
 
 
 class RenderServerProxy:
-
+    """The ServerProxy class is responsible for interacting with a remote server.
+    It provides convenience methods to request data from the server and store the status of the server.
+    """
+    
     def __init__(self, hostname, server_port="8080"):
         self.hostname = hostname
         self.port = server_port
@@ -34,21 +41,34 @@ class RenderServerProxy:
         self.__background_thread = None
         self.__offline_flags = 0
         self.update_cadence = 5
+        self.is_localhost = bool(is_localhost(hostname))
 
         # Cache some basic server info
         self.system_cpu = None
         self.system_cpu_count = None
         self.system_os = None
         self.system_os_version = None
+        self.system_api_version = None
 
-    def connect(self):
+    # --------------------------------------------
-        return self.status()
+    # Basics / Connection:
+    # --------------------------------------------
+
+    def __repr__(self):
+        return f"<RenderServerProxy - {self.hostname}>"
+
+    def check_connection(self):
+        try:
+            return self.request("heartbeat").ok
+        except Exception:
+            pass
+        return False
 
     def is_online(self):
         if self.__update_in_background:
             return self.__offline_flags < OFFLINE_MAX
         else:
-            return self.connect() is not None
+            return self.check_connection()
 
     def status(self):
         if not self.is_online():
@@ -56,11 +76,16 @@ class RenderServerProxy:
         running_jobs = [x for x in self.__jobs_cache if x['status'] == 'running'] if self.__jobs_cache else []
         return f"{len(running_jobs)} running" if running_jobs else "Ready"
 
+    # --------------------------------------------
+    # Requests:
+    # --------------------------------------------
+
     def request_data(self, payload, timeout=5):
         try:
             req = self.request(payload, timeout)
-            if req.ok and req.status_code == 200:
+            if req.ok:
                 self.__offline_flags = 0
+            if req.status_code == 200:
                 return req.json()
         except json.JSONDecodeError as e:
             logger.debug(f"JSON decode error: {e}")
@@ -72,10 +97,28 @@ class RenderServerProxy:
             self.__offline_flags = self.__offline_flags + 1
         except Exception as e:
             logger.exception(f"Uncaught exception: {e}")
+
+        # If server unexpectedly drops off the network, stop background updates
+        if self.__offline_flags > OFFLINE_MAX:
+            try:
+                self.stop_background_update()
+            except KeyError:
+                pass
         return None
 
     def request(self, payload, timeout=5):
-        return requests.get(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout)
+        from src.api.api_server import API_VERSION
+        return requests.get(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout,
+                            headers={"X-API-Version": str(API_VERSION)})
+
+    def _post(self, payload, timeout=5, **kwargs):
+        from src.api.api_server import API_VERSION
+        return requests.post(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout,
+                             headers={"X-API-Version": str(API_VERSION)}, **kwargs)
+
+    # --------------------------------------------
+    # Background Updates:
+    # --------------------------------------------
 
     def start_background_update(self):
         if self.__update_in_background:
@@ -83,27 +126,23 @@ class RenderServerProxy:
         self.__update_in_background = True
 
         def thread_worker():
+            logger.debug(f'Starting background updates for {self.hostname}')
             while self.__update_in_background:
                 self.__update_job_cache()
                 time.sleep(self.update_cadence)
+            logger.debug(f'Stopping background updates for {self.hostname}')
 
         self.__background_thread = threading.Thread(target=thread_worker)
         self.__background_thread.daemon = True
         self.__background_thread.start()
 
-    def stop_background_update(self):
+    def __update_job_cache(self, timeout=40, ignore_token=False):
-        self.__update_in_background = False
 
-    def get_job_info(self, job_id, timeout=5):
+        if self.__offline_flags:  # if we're offline, don't bother with the long poll
-        return self.request_data(f'job/{job_id}', timeout=timeout)
+            ignore_token = True
 
-    def get_all_jobs(self, timeout=5, ignore_token=False):
+        url = f'jobs/long_poll?token={self.__jobs_cache_token}' if (self.__jobs_cache_token and
-        if not self.__update_in_background or ignore_token:
+                                                                    not ignore_token) else 'jobs'
-            self.__update_job_cache(timeout, ignore_token)
-        return self.__jobs_cache.copy() if self.__jobs_cache else None
-
-    def __update_job_cache(self, timeout=5, ignore_token=False):
-        url = f'jobs?token={self.__jobs_cache_token}' if self.__jobs_cache_token and not ignore_token else 'jobs'
         status_result = self.request_data(url, timeout=timeout)
         if status_result is not None:
             sorted_jobs = []
@@ -114,78 +153,184 @@ class RenderServerProxy:
             self.__jobs_cache = sorted_jobs
             self.__jobs_cache_token = status_result['token']
 
-    def get_data(self, timeout=5):
+    def stop_background_update(self):
-        all_data = self.request_data('full_status', timeout=timeout)
+        self.__update_in_background = False
-        return all_data
 
-    def cancel_job(self, job_id, confirm=False):
+    # --------------------------------------------
-        return self.request_data(f'job/{job_id}/cancel?confirm={confirm}')
+    # Get System Info:
+    # --------------------------------------------
 
-    def delete_job(self, job_id, confirm=False):
+    def get_jobs(self, timeout=5, ignore_token=False):
-        return self.request_data(f'job/{job_id}/delete?confirm={confirm}')
+        if not self.__update_in_background or ignore_token:
+            self.__update_job_cache(timeout, ignore_token)
+        return self.__jobs_cache.copy()
 
     def get_status(self):
         status = self.request_data('status')
-        if not self.system_cpu:
+        if status and not self.system_cpu:
             self.system_cpu = status['system_cpu']
             self.system_cpu_count = status['cpu_count']
             self.system_os = status['system_os']
             self.system_os_version = status['system_os_version']
+            self.system_api_version = status['api_version']
         return status
 
-    def is_engine_available(self, engine_name):
+    # --------------------------------------------
-        return self.request_data(f'{engine_name}/is_available')
+    # Get Job Info:
+    # --------------------------------------------
 
-    def get_all_engines(self):
+    def get_job(self, job_id, timeout=5):
-        return self.request_data('all_engines')
+        return self.request_data(f'jobs/{job_id}', timeout=timeout)
 
-    def notify_parent_of_status_change(self, parent_id, subjob):
+    def get_job_files(self, job_id):
-        return requests.post(f'http://{self.hostname}:{self.port}/api/job/{parent_id}/notify_parent_of_status_change',
+        return self.request_data(f'jobs/{job_id}/files')
-                             json=subjob.json())
 
-    def post_job_to_server(self, file_path, job_list, callback=None):
+    # --------------------------------------------
+    # Job Lifecycle:
+    # --------------------------------------------
 
-        # bypass uploading file if posting to localhost
+    def create_job(self, file_path: Path, job_data, callback=None, timeout=JOB_UPLOAD_TIMEOUT):
-        if is_localhost(self.hostname):
+        """
-            jobs_with_path = [{**item, "local_path": file_path} for item in job_list]
+        Posts a job to the server.
-            return requests.post(f'http://{self.hostname}:{self.port}/api/add_job', data=json.dumps(jobs_with_path),
-                                     headers={'Content-Type': 'application/json'})
 
-        # Prepare the form data
+        Args:
-        encoder = MultipartEncoder({
+            file_path (Path): The path to the file to upload.
-            'file': (os.path.basename(file_path), open(file_path, 'rb'), 'application/octet-stream'),
+            job_data (dict): A dict of jobs data.
-            'json': (None, json.dumps(job_list), 'application/json'),
+            callback (function, optional): A callback function to call during the upload. Defaults to None.
-        })
+            timeout (float | tuple, optional): Requests timeout. Defaults to a 10-second connect timeout and
+                30-minute read timeout for large uploads.
 
-        # Create a monitor that will track the upload progress
+        Returns:
-        if callback:
+            Response: The response from the server.
-            monitor = MultipartEncoderMonitor(encoder, callback(encoder))
+        """
-        else:
+        # Check if file exists
-            monitor = MultipartEncoderMonitor(encoder)
+        if not file_path.exists():
+            raise FileNotFoundError(f"File not found: {file_path}")
 
-        # Send the request
+        # Bypass uploading file if posting to localhost
-        headers = {'Content-Type': monitor.content_type}
+        if self.is_localhost:
-        return requests.post(f'http://{self.hostname}:{self.port}/api/add_job', data=monitor, headers=headers)
+            job_data['local_path'] = str(file_path)
+            url = urljoin(f'http://{self.hostname}:{self.port}', '/api/jobs')
+            headers = {'Content-Type': 'application/json'}
+            return requests.post(url, data=json.dumps(job_data), headers=headers, timeout=timeout)
 
-    def get_job_files(self, job_id, save_path):
+        # Prepare the form data for remote host
-        url = f"http://{self.hostname}:{self.port}/api/job/{job_id}/download_all"
+        with open(file_path, 'rb') as file:
-        return self.download_file(url, filename=save_path)
+            encoder = MultipartEncoder({
+                'file': (file_path.name, file, 'application/octet-stream'),
+                'json': (None, json.dumps(job_data), 'application/json'),
+            })
 
-    @staticmethod
+            # Create a monitor that will track the upload progress
-    def download_file(url, filename):
+            monitor = MultipartEncoderMonitor(encoder, callback) if callback else MultipartEncoderMonitor(encoder)
-        with requests.get(url, stream=True) as r:
+            headers = {'Content-Type': monitor.content_type}
-            r.raise_for_status()
+            url = urljoin(f'http://{self.hostname}:{self.port}', '/api/jobs')
-            with open(filename, 'wb') as f:
-                for chunk in r.iter_content(chunk_size=8192):
-                    f.write(chunk)
-        return filename
 
-    # --- Renderer --- #
+            # Send the request with proper resource management
+            with requests.post(url, data=monitor, headers=headers, timeout=timeout) as response:
+                return response
 
-    def get_renderer_info(self, timeout=5):
+    def cancel_job(self, job_id, confirm=False):
-        all_data = self.request_data(f'renderer_info', timeout=timeout)
+        response = self._post(f'jobs/{job_id}/cancel', params={'confirm': confirm})
+        if response.ok:
+            self.__update_job_cache(timeout=5, ignore_token=True)
+        return response
+
+    def delete_job(self, job_id, confirm=False):
+        response = self._post(f'jobs/{job_id}/delete', params={'confirm': confirm})
+        if response.ok:
+            self.__update_job_cache(timeout=5, ignore_token=True)
+        return response
+
+    def send_subjob_update_notification(self, parent_id, subjob, timeout=5):
+        """
+        Notifies the parent job of an update in a subjob.
+
+        Args:
+            parent_id (str): The ID of the parent job.
+            subjob (Job): The subjob that has updated.
+
+        Returns:
+            Response: The response from the server.
+        """
+        return requests.post(f'http://{self.hostname}:{self.port}/api/jobs/{parent_id}/subjob_update',
+                             json=subjob.json(), timeout=timeout)
+
+    # --------------------------------------------
+    # Engines:
+    # --------------------------------------------
+
+    def get_engine_for_filename(self, filename:str, timeout=5):
+        response = self.request(f'engines/for_filename?filename={os.path.basename(filename)}', timeout)
+        return response.text
+
+    def get_engine_availability(self, engine_name:str, timeout=5):
+        return self.request_data(f'engines/{engine_name}/availability', timeout)
+
+    def get_engine_names(self, timeout=5):
+        return self.request_data('engines/names', timeout=timeout)
+
+    def get_engines(self, response_type='standard', timeout=5):
+        """
+        Fetches engine information from the server.
+
+        Args:
+            response_type (str, optional): Returns standard or full version of engine info
+            timeout (int, optional): The number of seconds to wait for a response from the server. Defaults to 5.
+
+        Returns:
+            dict: A dictionary containing the engine information.
+        """
+        all_data = self.request_data(f'engines?response_type={response_type}', timeout=timeout)
         return all_data
 
-    def delete_engine(self, engine, version, system_cpu=None):
+    def get_engine(self, engine_name:str, response_type='standard', timeout=5):
-        form_data = {'engine': engine, 'version': version, 'system_cpu': system_cpu}
+        """
-        return requests.post(f'http://{self.hostname}:{self.port}/api/delete_engine', json=form_data)
+        Fetches specific engine information from the server.
+
+        Args:
+            engine_name (str): Name of the engine
+            response_type (str, optional): Returns standard or full version of engine info
+            timeout (int, optional): The number of seconds to wait for a response from the server. Defaults to 5.
+
+        Returns:
+            dict: A dictionary containing the engine information.
+        """
+        return self.request_data(f'engines/{engine_name}?response_type={response_type}', timeout)
+
+    def delete_engine_download(self, engine_name:str, version:str, system_os=None, cpu=None):
+        """
+        Sends a request to the server to delete a specific engine download.
+
+        Args:
+            engine_name (str): The name of the engine to delete.
+            version (str): The version of the engine to delete.
+            system_os (str, optional): The system OS. Defaults to None.
+            cpu (str, optional): The system CPU type. Defaults to None.
+
+        Returns:
+            Response: The response from the server.
+        """
+        form_data = {'engine': engine_name, 'version': version, 'system_os': system_os, 'cpu': cpu}
+        return self._post('engines/delete', json=form_data)
+
+    # --------------------------------------------
+    # Download Files:
+    # --------------------------------------------
+
+    def download_all_job_files(self, job_id, save_path, timeout=FILE_DOWNLOAD_TIMEOUT):
+        url = f'http://{self.hostname}:{self.port}/api/jobs/{job_id}/download_all'
+        return self.__download_file_from_url(url, output_filepath=save_path, timeout=timeout)
+
+    def download_job_file(self, job_id, job_filename, save_path, timeout=FILE_DOWNLOAD_TIMEOUT):
+        url = f'http://{self.hostname}:{self.port}/api/jobs/{job_id}/download?filename={job_filename}'
+        return self.__download_file_from_url(url, output_filepath=save_path, timeout=timeout)
+
+    @staticmethod
+    def __download_file_from_url(url, output_filepath, timeout=FILE_DOWNLOAD_TIMEOUT):
+        with requests.get(url, stream=True, timeout=timeout) as r:
+            r.raise_for_status()
+            with open(output_filepath, 'wb') as f:
+                for chunk in r.iter_content(chunk_size=8192):
+                    f.write(chunk)
+        return output_filepath

src/api/serverproxy_manager.py

@@ -17,19 +17,19 @@ class ServerProxyManager:
         pub.subscribe(cls.__zeroconf_state_change, 'zeroconf_state_change')
 
     @classmethod
-    def __zeroconf_state_change(cls, hostname, state_change, info):
+    def __zeroconf_state_change(cls, hostname, state_change):
         if state_change == ServiceStateChange.Added or state_change == ServiceStateChange.Updated:
             cls.get_proxy_for_hostname(hostname)
         else:
+            cls.get_proxy_for_hostname(hostname).stop_background_update()
             cls.server_proxys.pop(hostname)
 
     @classmethod
     def get_proxy_for_hostname(cls, hostname):
         found_proxy = cls.server_proxys.get(hostname)
-        if not found_proxy:
+        if hostname and not found_proxy:
             new_proxy = RenderServerProxy(hostname)
             new_proxy.start_background_update()
             cls.server_proxys[hostname] = new_proxy
             found_proxy = new_proxy
         return found_proxy
-

src/application_context.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Optional
+
+if TYPE_CHECKING:
+    from src.api.preview_manager import PreviewManager
+    from src.distributed_job_manager import DistributedJobManager
+    from src.engines.engine_manager import EngineManager
+    from src.render_queue import RenderQueue
+    from src.utilities.config import Config
+    from src.utilities.zeroconf_server import ZeroconfServer
+
+
+class ApplicationContext:
+    """Holds all service instances. Single source of truth for wiring."""
+
+    def __init__(self) -> None:
+        self.config: Optional[Config] = None
+        self.engine_manager: Optional[EngineManager] = None
+        self.preview_manager: Optional[PreviewManager] = None
+        self.zeroconf_server: Optional[ZeroconfServer] = None
+        self.render_queue: Optional[RenderQueue] = None
+        self.distributed_job_manager: Optional[DistributedJobManager] = None

src/distributed_job_manager.py

@@ -1,15 +1,20 @@
 import logging
 import os
 import socket
+import threading
 import time
-import zipfile
+from typing import Optional
+from pathlib import Path
 
 from plyer import notification
 from pubsub import pub
 
+from src.api.preview_manager import PreviewManager
 from src.api.server_proxy import RenderServerProxy
+from src.engines.engine_manager import EngineManager
 from src.render_queue import RenderQueue
-from src.utilities.misc_helper import get_file_size_human
+from src.utilities.config import Config
+from src.utilities.server_helper import download_missing_frames_from_subjob, distribute_server_work
 from src.utilities.status_utils import RenderStatus, string_to_status
 from src.utilities.zeroconf_server import ZeroconfServer
 
@@ -17,356 +22,306 @@ logger = logging.getLogger()
 
 
 class DistributedJobManager:
-
+    _default_instance: Optional['DistributedJobManager'] = None
-    def __init__(self):
-        pass
 
     @classmethod
-    def subscribe_to_listener(cls):
+    def _sync_class(cls) -> None:
-        """
+        if cls._default_instance is not None:
-          Subscribes the private class method '__local_job_status_changed' to the 'status_change' pubsub message.
+            pass  # no class-level attributes to sync
-          This should be called once, typically during the initialization phase.
-        """
-        pub.subscribe(cls.__local_job_status_changed, 'status_change')
 
-    @classmethod
+    def __init__(self) -> None:
-    def __local_job_status_changed(cls, job_id, old_status, new_status):
+        self.background_worker: Optional[threading.Thread] = None
-        """
-        Responds to the 'status_change' pubsub message for local jobs.
-        If it's a child job, it notifies the parent job about the status change.
 
-        Parameters:
+    def _subscribe_to_listener(self) -> None:
-        job_id (str): The ID of the job that has changed status.
+        pub.subscribe(self._local_job_status_changed, 'status_change')
-        old_status (str): The previous status of the job.
+        pub.subscribe(self._local_job_frame_complete, 'frame_complete')
-        new_status (str): The new (current) status of the job.
-
-        Note: Do not call directly. Instead, call via the 'status_change' pubsub message.
-        """
 
+    def _local_job_frame_complete(self, job_id, frame_number, update_interval=5) -> None:
         render_job = RenderQueue.job_with_id(job_id, none_ok=True)
-        if not render_job:  # ignore jobs created but not yet added to queue
+        if not render_job:
+            return
+
+        logger.debug(f"Job {job_id} has completed frame #{frame_number}")
+        replace_existing_previews = (frame_number % update_interval) == 0
+        self._job_update_shared(render_job, replace_existing_previews)
+
+    def _job_update_shared(self, render_job, replace_existing_previews=False) -> None:
+        PreviewManager.update_previews_for_job(job=render_job, replace_existing=replace_existing_previews)
+
+        if render_job.parent:
+            parent_id, parent_hostname = render_job.parent.split('@')[0], render_job.parent.split('@')[-1]
+            try:
+                logger.debug(f'Job {render_job.id} updating parent {parent_id}@{parent_hostname}')
+                RenderServerProxy(parent_hostname).send_subjob_update_notification(parent_id, render_job)
+            except Exception as e:
+                logger.error(f"Error notifying parent {parent_hostname} about update in subjob {render_job.id}: {e}")
+
+    def _local_job_status_changed(self, job_id: str, old_status: str, new_status: str) -> None:
+        render_job = RenderQueue.job_with_id(job_id, none_ok=True)
+        if not render_job:
             return
 
         logger.debug(f"Job {job_id} status change: {old_status} -> {new_status}")
-        if render_job.parent:  # If local job is a subjob from a remote server
+        self._job_update_shared(render_job, replace_existing_previews=(render_job.status == RenderStatus.COMPLETED))
-            parent_id, hostname = render_job.parent.split('@')[0], render_job.parent.split('@')[-1]
-            RenderServerProxy(hostname).notify_parent_of_status_change(parent_id=parent_id, subjob=render_job)
 
-        # handle cancelling all the children
+        if render_job.children:
-        elif render_job.children and new_status in [RenderStatus.CANCELLED, RenderStatus.ERROR]:
+            if new_status in (RenderStatus.CANCELLED, RenderStatus.ERROR):
-            for child in render_job.children:
+                for child in render_job.children:
-                child_id, hostname = child.split('@')
+                    child_id, child_hostname = child.split('@')
-                RenderServerProxy(hostname).cancel_job(child_id, confirm=True)
+                    RenderServerProxy(child_hostname).cancel_job(child_id, confirm=True)
 
-        # UI Notifications
         try:
             if new_status == RenderStatus.COMPLETED:
-                logger.debug("show render complete notification")
+                logger.debug("Show render complete notification")
                 notification.notify(
                     title='Render Job Complete',
                     message=f'{render_job.name} completed succesfully',
-                    timeout=10  # Display time in seconds
+                    timeout=10
                 )
             elif new_status == RenderStatus.ERROR:
-                logger.debug("show render complete notification")
+                logger.debug("Show render error notification")
                 notification.notify(
                     title='Render Job Failed',
                     message=f'{render_job.name} failed rendering',
-                    timeout=10  # Display time in seconds
+                    timeout=10
                 )
             elif new_status == RenderStatus.RUNNING:
-                logger.debug("show render complete notification")
+                logger.debug("Show render started notification")
                 notification.notify(
                     title='Render Job Started',
                     message=f'{render_job.name} started rendering',
-                    timeout=10  # Display time in seconds
+                    timeout=10
                 )
         except Exception as e:
             logger.debug(f"Unable to show UI notification: {e}")
 
-    @classmethod
+    # --------------------------------------------
-    def handle_subjob_status_change(cls, local_job, subjob_data):
+    # Create Job
-        """
+    # --------------------------------------------
-        Responds to a status change from a remote subjob and triggers the creation or modification of subjobs as needed.
 
-        Parameters:
+    def _create_render_job(self, new_job_attributes: dict, loaded_project_local_path: Path):
-        local_job (BaseRenderWorker): The local parent job worker.
+        requested_output_path = new_job_attributes.get('output_path')
-        subjob_data (dict): subjob data sent from remote server.
+        output_filename = Path(str(requested_output_path)).name if requested_output_path else loaded_project_local_path.stem
 
-        Returns:
+        output_dir = loaded_project_local_path.parent.parent / "output"
-        None
+        if new_job_attributes.get('__use_output_subdir'):
-        """
+            output_dir = output_dir / output_filename
+        output_path = output_dir / output_filename
+        os.makedirs(output_dir, exist_ok=True)
+        logger.debug(f"New job output path: {output_path}")
 
+        worker = EngineManager.create_worker(engine_name=new_job_attributes['engine_name'],
+                                             input_path=loaded_project_local_path,
+                                             output_path=output_path,
+                                             engine_version=new_job_attributes.get('engine_version'),
+                                             args=new_job_attributes.get('args', {}),
+                                             parent=new_job_attributes.get('parent'),
+                                             name=new_job_attributes.get('name'))
+        worker.status = new_job_attributes.get("initial_status", worker.status)
+        worker.priority = int(new_job_attributes.get('priority', worker.priority))
+        worker.start_frame = int(new_job_attributes.get("start_frame", worker.start_frame))
+        worker.end_frame = int(new_job_attributes.get("end_frame", worker.end_frame))
+        worker.watchdog_timeout = Config.worker_process_timeout
+        worker.hostname = socket.gethostname()
+
+        if new_job_attributes.get("enable_split_jobs", False) and (worker.total_frames > 1) and not worker.parent:
+            self.split_into_subjobs_async(worker, new_job_attributes, loaded_project_local_path)
+        else:
+            worker.status = RenderStatus.NOT_STARTED
+
+        RenderQueue.add_to_render_queue(worker, force_start=new_job_attributes.get('force_start', False))
+        PreviewManager.update_previews_for_job(worker)
+
+        return worker
+
+    # --------------------------------------------
+    # Handling Subjobs
+    # --------------------------------------------
+
+    def _handle_subjob_update_notification(self, local_job, subjob_data: dict) -> None:
         subjob_status = string_to_status(subjob_data['status'])
         subjob_id = subjob_data['id']
-        subjob_hostname = next((hostname.split('@')[1] for hostname in local_job.children if
+        subjob_hostname = subjob_data['hostname']
-                                hostname.split('@')[0] == subjob_id), None)
+        subjob_key = f'{subjob_id}@{subjob_hostname}'
-        local_job.children[f'{subjob_id}@{subjob_hostname}'] = subjob_data
+        old_status = local_job.children.get(subjob_key, {}).get('status')
+        local_job.children[subjob_key] = subjob_data
 
-        logname = f"{local_job.id}:{subjob_id}@{subjob_hostname}"
+        logname = f"<Parent: {local_job.id} | Child: {subjob_key}>"
-        logger.debug(f"Subjob status changed: {logname} -> {subjob_status.value}")
+        if old_status != subjob_status.value:
+            logger.debug(f"Subjob status changed: {logname} -> {subjob_status.value}")
 
-        # Download complete or partial render jobs
+        download_success = download_missing_frames_from_subjob(local_job, subjob_id, subjob_hostname)
-        if subjob_status in [RenderStatus.COMPLETED, RenderStatus.CANCELLED, RenderStatus.ERROR] and \
+        if subjob_data['status'] == 'completed' and download_success:
-                subjob_data['file_count']:
+            local_job.children[subjob_key]['download_status'] = 'completed'
-            download_result = cls.download_from_subjob(local_job, subjob_id, subjob_hostname)
-            if not download_result:
-                # todo: handle error
-                logger.error(f"Unable to download subjob files from {logname} with status {subjob_status.value}")
 
-        if subjob_status == RenderStatus.CANCELLED or subjob_status == RenderStatus.ERROR:
+    def _wait_for_subjobs(self, parent_job) -> None:
-            # todo: determine missing frames and schedule new job
+        logger.debug(f"Waiting for subjobs for job {parent_job}")
-            pass
+        parent_job.status = RenderStatus.WAITING_FOR_SUBJOBS
-
+        statuses_to_download = (RenderStatus.CANCELLED, RenderStatus.ERROR, RenderStatus.COMPLETED)
-    @staticmethod
-    def download_from_subjob(local_job, subjob_id, subjob_hostname):
-        """
-        Downloads and extracts files from a completed subjob on a remote server.
-
-        Parameters:
-        local_job (BaseRenderWorker): The local parent job worker.
-        subjob_id (str or int): The ID of the subjob.
-        subjob_hostname (str): The hostname of the remote server where the subjob is located.
-
-        Returns:
-        bool: True if the files have been downloaded and extracted successfully, False otherwise.
-        """
-
-        child_key = f'{subjob_id}@{subjob_hostname}'
-        logname = f"{local_job.id}:{child_key}"
-        zip_file_path = local_job.output_path + f'_{subjob_hostname}_{subjob_id}.zip'
-
-        # download zip file from server
-        try:
-            local_job.children[child_key]['download_status'] = 'working'
-            logger.info(f"Downloading completed subjob files from {subjob_hostname} to localhost")
-            RenderServerProxy(subjob_hostname).get_job_files(subjob_id, zip_file_path)
-            logger.info(f"File transfer complete for {logname} - Transferred {get_file_size_human(zip_file_path)}")
-        except Exception as e:
-            logger.exception(f"Exception downloading files from remote server: {e}")
-            local_job.children[child_key]['download_status'] = 'failed'
-            return False
-
-        # extract zip
-        try:
-            logger.debug(f"Extracting zip file: {zip_file_path}")
-            extract_path = os.path.dirname(zip_file_path)
-            with zipfile.ZipFile(zip_file_path, 'r') as zip_ref:
-                zip_ref.extractall(extract_path)
-                logger.info(f"Successfully extracted zip to: {extract_path}")
-            os.remove(zip_file_path)
-            local_job.children[child_key]['download_status'] = 'complete'
-        except Exception as e:
-            logger.exception(f"Exception extracting zip file: {e}")
-            local_job.children[child_key]['download_status'] = 'failed'
-
-        return local_job.children[child_key].get('download_status', None) == 'complete'
-
-    @classmethod
-    def wait_for_subjobs(cls, local_job):
-        logger.debug(f"Waiting for subjobs for job {local_job}")
-        local_job.status = RenderStatus.WAITING_FOR_SUBJOBS
-        statuses_to_download = [RenderStatus.CANCELLED, RenderStatus.ERROR, RenderStatus.COMPLETED]
 
         def subjobs_not_downloaded():
-            return {k: v for k, v in local_job.children.items() if 'download_status' not in v or
+            return {k: v for k, v in parent_job.children.items() if 'download_status' not in v or
                     v['download_status'] == 'working' or v['download_status'] is None}
 
-        logger.info(f'Waiting on {len(subjobs_not_downloaded())} subjobs for {local_job.id}')
+        logger.info(f'Waiting on {len(subjobs_not_downloaded())} subjobs for {parent_job.id}')
 
-        while len(subjobs_not_downloaded()):
+        server_delay = 10
-            for child_key, subjob_cached_data in subjobs_not_downloaded().items():
+        sleep_counter = 0
+        while parent_job.status == RenderStatus.WAITING_FOR_SUBJOBS:
 
-                subjob_id = child_key.split('@')[0]
+            if sleep_counter % server_delay == 0:
-                subjob_hostname = child_key.split('@')[-1]
+                for child_key in subjobs_not_downloaded():
+                    subjob_id = child_key.split('@')[0]
+                    subjob_hostname = child_key.split('@')[-1]
 
-                # Fetch info from server and handle failing case
+                    subjob_data = RenderServerProxy(subjob_hostname).get_job(subjob_id)
-                subjob_data = RenderServerProxy(subjob_hostname).get_job_info(subjob_id)
+                    if not subjob_data:
-                if not subjob_data:
+                        logger.warning(f"No response from {subjob_hostname}")
-                    logger.warning(f"No response from: {subjob_hostname}")
+                        parent_job.children[child_key]['download_status'] = f'error: No response from {subjob_hostname}'
-                    # todo: handle timeout / missing server situations
+                        continue
-                    continue
 
-                # Update parent job cache but keep the download status
+                    download_status = parent_job.children[child_key].get('download_status', None)
-                download_status = local_job.children[child_key].get('download_status', None)
+                    parent_job.children[child_key] = subjob_data
-                local_job.children[child_key] = subjob_data
+                    parent_job.children[child_key]['download_status'] = download_status
-                local_job.children[child_key]['download_status'] = download_status
 
-                status = string_to_status(subjob_data.get('status', ''))
+                    status = string_to_status(subjob_data.get('status', ''))
-                status_msg = f"Subjob {child_key} | {status} | " \
+                    status_msg = f"Subjob {child_key} | {status} | " \
-                             f"{float(subjob_data.get('percent_complete')) * 100.0}%"
+                                 f"{float(subjob_data.get('percent_complete')) * 100.0}%"
-                logger.debug(status_msg)
+                    logger.debug(status_msg)
 
-                # Still working in another thread - keep waiting
+                    if download_status is None and subjob_data.get('file_count') and status in statuses_to_download:
-                if download_status == 'working':
+                        try:
-                    continue
+                            download_missing_frames_from_subjob(parent_job, subjob_id, subjob_hostname)
+                            parent_job.children[child_key]['download_status'] = 'complete'
+                        except Exception as e:
+                            logger.error(f"Error downloading missing frames from subjob: {e}")
+                            parent_job.children[child_key]['download_status'] = 'error: {}'
 
-                # Check if job is finished, but has not had files copied yet over yet
+                    if parent_job.children[child_key].get('download_status', None) is None and \
-                if download_status is None and subjob_data['file_count'] and status in statuses_to_download:
+                            status in statuses_to_download:
-                    download_result = cls.download_from_subjob(local_job, subjob_id, subjob_hostname)
+                        logger.warning(f"Skipping waiting on downloading from subjob: {child_key}")
-                    if not download_result:
+                        parent_job.children[child_key]['download_status'] = 'skipped'
-                        logger.error("Failed to download from subjob")
-                        # todo: error handling here
-
-                # Any finished jobs not successfully downloaded at this point are skipped
-                if local_job.children[child_key].get('download_status', None) is None and \
-                        status in statuses_to_download:
-                    logger.warning(f"Skipping waiting on downloading from subjob: {child_key}")
-                    local_job.children[child_key]['download_status'] = 'skipped'
 
             if subjobs_not_downloaded():
                 logger.debug(f"Waiting on {len(subjobs_not_downloaded())} subjobs on "
                              f"{', '.join(list(subjobs_not_downloaded().keys()))}")
-                time.sleep(5)
+                time.sleep(1)
+                sleep_counter += 1
+            else:
+                parent_job.status = RenderStatus.RUNNING
 
-    @classmethod
+    # --------------------------------------------
-    def split_into_subjobs(cls, worker, job_data, project_path, system_os=None):
+    # Creating Subjobs
+    # --------------------------------------------
 
-        # Check availability
+    def _split_into_subjobs_async(self, parent_worker, new_job_attributes, project_path, system_os=None) -> None:
-        available_servers = cls.find_available_servers(worker.renderer, system_os)
+        parent_worker.status = RenderStatus.CONFIGURING
-        logger.debug(f"Splitting into subjobs - Available servers: {available_servers}")
+        self.background_worker = threading.Thread(target=self.split_into_subjobs, args=(
-        subjob_servers = cls.distribute_server_work(worker.start_frame, worker.end_frame, available_servers)
+            parent_worker, new_job_attributes, project_path, system_os))
-        local_hostname = socket.gethostname()
+        self.background_worker.start()
 
-        # Prep and submit these sub-jobs
+    def split_into_subjobs(self, parent_worker, new_job_attributes, project_path, system_os=None, specific_servers=None) -> None:
-        logger.info(f"Job {worker.id} split plan: {subjob_servers}")
+        available_servers = specific_servers if specific_servers else self.find_available_servers(
+            parent_worker.engine_name, system_os)
+        external_servers = [x for x in available_servers if x['hostname'] != parent_worker.hostname]
+        if not external_servers:
+            parent_worker.status = RenderStatus.NOT_STARTED
+            return
+
+        logger.debug(f"Splitting into subjobs - Available servers: {[x['hostname'] for x in available_servers]}")
+        all_subjob_server_data = distribute_server_work(parent_worker.start_frame, parent_worker.end_frame, available_servers)
+
+        logger.info(f"Job {parent_worker.id} split plan: {all_subjob_server_data}")
         try:
-            for server_data in subjob_servers:
+            for subjob_data in all_subjob_server_data:
-                server_hostname = server_data['hostname']
+                subjob_hostname = subjob_data['hostname']
-                if server_hostname != local_hostname:
+                post_results = self._create_subjob(new_job_attributes, project_path, subjob_data, subjob_hostname,
-                    post_results = cls.__create_subjob(job_data, local_hostname, project_path, server_data,
+                                                   parent_worker)
-                                                       server_hostname, worker)
+                if not post_results.ok:
-                    if post_results.ok:
+                    ValueError(f"Failed to create subjob on {subjob_hostname}")
-                        server_data['submission_results'] = post_results.json()[0]
-                    else:
-                        logger.error(f"Failed to create subjob on {server_hostname}")
-                        break
-                else:
-                    # truncate parent render_job
-                    worker.start_frame = max(server_data['frame_range'][0], worker.start_frame)
-                    worker.end_frame = min(server_data['frame_range'][-1], worker.end_frame)
-                    logger.info(f"Local job now rendering from {worker.start_frame} to {worker.end_frame}")
-                    server_data['submission_results'] = worker.json()
 
-            # check that job posts were all successful.
+                submission_results = post_results.json()[0]
-            if not all(d.get('submission_results') is not None for d in subjob_servers):
+                child_key = f"{submission_results['id']}@{subjob_hostname}"
-                raise ValueError("Failed to create all subjobs")  # look into recalculating job #s and use exising jobs
+                parent_worker.children[child_key] = submission_results
-
-            # start subjobs
-            logger.debug(f"Starting {len(subjob_servers) - 1} attempted subjobs")
-            for server_data in subjob_servers:
-                if server_data['hostname'] != local_hostname:
-                    child_key = f"{server_data['submission_results']['id']}@{server_data['hostname']}"
-                    worker.children[child_key] = server_data['submission_results']
-            worker.name = f"{worker.name}[{worker.start_frame}-{worker.end_frame}]"
 
+            logger.debug(f"Created {len(all_subjob_server_data)} subjobs successfully")
+            parent_worker.name = f"{parent_worker.name} (Parent)"
+            parent_worker.status = RenderStatus.NOT_STARTED
         except Exception as e:
-            # cancel all the subjobs
             logger.error(f"Failed to split job into subjobs: {e}")
-            logger.debug(f"Cancelling {len(subjob_servers) - 1} attempted subjobs")
+            logger.debug(f"Cancelling {len(all_subjob_server_data) - 1} attempted subjobs")
-            # [RenderServerProxy(hostname).cancel_job(results['id'], confirm=True) for hostname, results in
+            RenderServerProxy(parent_worker.hostname).cancel_job(parent_worker.id, confirm=True)
-            # submission_results.items()]   # todo: fix this
 
     @staticmethod
-    def __create_subjob(job_data, local_hostname, project_path, server_data, server_hostname, worker):
+    def _create_subjob(new_job_attributes: dict, project_path, server_data, server_hostname, parent_worker):
-        subjob = job_data.copy()
+        subjob = new_job_attributes.copy()
-        subjob['name'] = f"{worker.name}[{server_data['frame_range'][0]}-{server_data['frame_range'][-1]}]"
+        subjob['name'] = f"{parent_worker.name}[{server_data['frame_range'][0]}-{server_data['frame_range'][-1]}]"
-        subjob['parent'] = f"{worker.id}@{local_hostname}"
+        subjob['parent'] = f"{parent_worker.id}@{parent_worker.hostname}"
         subjob['start_frame'] = server_data['frame_range'][0]
         subjob['end_frame'] = server_data['frame_range'][-1]
+        subjob['engine_version'] = parent_worker.engine_version
         logger.debug(f"Posting subjob with frames {subjob['start_frame']}-"
                      f"{subjob['end_frame']} to {server_hostname}")
-        post_results = RenderServerProxy(server_hostname).post_job_to_server(
+        post_results = RenderServerProxy(server_hostname).create_job(
-            file_path=project_path, job_list=[subjob])
+            file_path=project_path, job_data=subjob)
         return post_results
 
-    @staticmethod
+    # --------------------------------------------
-    def distribute_server_work(start_frame, end_frame, available_servers, method='cpu_count'):
+    # Server Handling
-        """
+    # --------------------------------------------
-        Splits the frame range among available servers proportionally based on their performance (CPU count).
-
-        :param start_frame: int, The start frame number of the animation to be rendered.
-        :param end_frame: int, The end frame number of the animation to be rendered.
-        :param available_servers: list, A list of available server dictionaries. Each server dictionary should include
-        'hostname' and 'cpu_count' keys (see find_available_servers)
-        :param method: str, Optional. Specifies the distribution method. Possible values are 'cpu_count' and 'equally'
-
-
-        :return: A list of server dictionaries where each dictionary includes the frame range and total number of frames
-        to be rendered by the server.
-        """
-
-        # Calculate respective frames for each server
-        def divide_frames_by_cpu_count(frame_start, frame_end, servers):
-            total_frames = frame_end - frame_start + 1
-            total_performance = sum(server['cpu_count'] for server in servers)
-
-            frame_ranges = {}
-            current_frame = frame_start
-            allocated_frames = 0
-
-            for i, server in enumerate(servers):
-                if i == len(servers) - 1:  # if it's the last server
-                    # Give all remaining frames to the last server
-                    num_frames = total_frames - allocated_frames
-                else:
-                    num_frames = round((server['cpu_count'] / total_performance) * total_frames)
-                    allocated_frames += num_frames
-
-                frame_end_for_server = current_frame + num_frames - 1
-
-                if current_frame <= frame_end_for_server:
-                    frame_ranges[server['hostname']] = (current_frame, frame_end_for_server)
-                current_frame = frame_end_for_server + 1
-
-            return frame_ranges
-
-        def divide_frames_equally(frame_start, frame_end, servers):
-            frame_range = frame_end - frame_start + 1
-            frames_per_server = frame_range // len(servers)
-            leftover_frames = frame_range % len(servers)
-
-            frame_ranges = {}
-            current_start = frame_start
-            for i, server in enumerate(servers):
-                current_end = current_start + frames_per_server - 1
-                if leftover_frames > 0:
-                    current_end += 1
-                    leftover_frames -= 1
-                if current_start <= current_end:
-                    frame_ranges[server['hostname']] = (current_start, current_end)
-                current_start = current_end + 1
-
-            return frame_ranges
-
-        if method == 'equally':
-            breakdown = divide_frames_equally(start_frame, end_frame, available_servers)
-        # elif method == 'benchmark_score':  # todo: implement benchmark score
-        #     pass
-        else:
-            breakdown = divide_frames_by_cpu_count(start_frame, end_frame, available_servers)
-
-        server_breakdown = [server for server in available_servers if breakdown.get(server['hostname']) is not None]
-        for server in server_breakdown:
-            server['frame_range'] = breakdown[server['hostname']]
-            server['total_frames'] = breakdown[server['hostname']][-1] - breakdown[server['hostname']][0] + 1
-        return server_breakdown
 
     @staticmethod
-    def find_available_servers(engine_name, system_os=None):
+    def find_available_servers(engine_name: str, system_os=None):
-        """
+        from src.api.api_server import API_VERSION
-        Scan the Zeroconf network for currently available render servers supporting a specific engine.
+        found_available_servers = []
-
-        :param engine_name: str, The engine type to search for
-        :param system_os: str, Restrict results to servers running a specific OS
-        :return: A list of dictionaries with each dict containing hostname and cpu_count of available servers
-        """
-        available_servers = []
         for hostname in ZeroconfServer.found_hostnames():
             host_properties = ZeroconfServer.get_hostname_properties(hostname)
-            if not system_os or (system_os and system_os == host_properties.get('system_os')):
+            if host_properties.get('api_version') == API_VERSION:
-                response = RenderServerProxy(hostname).is_engine_available(engine_name)
+                if not system_os or (system_os and system_os == host_properties.get('system_os')):
-                if response and response.get('available', False):
+                    response = RenderServerProxy(hostname).get_engine_availability(engine_name)
-                    available_servers.append(response)
+                    if response and response.get('available', False):
+                        found_available_servers.append(response)
 
-        return available_servers
+        return found_available_servers
+
+    # --- Forwarders for backward compatibility ---
+
+    @classmethod
+    def subscribe_to_listener(cls):
+        if cls._default_instance is not None:
+            cls._default_instance._subscribe_to_listener()
+
+    @classmethod
+    def create_render_job(cls, new_job_attributes, loaded_project_local_path):
+        if cls._default_instance is not None:
+            return cls._default_instance._create_render_job(new_job_attributes, loaded_project_local_path)
+        raise RuntimeError("DistributedJobManager is not initialized")
+
+    @classmethod
+    def handle_subjob_update_notification(cls, local_job, subjob_data):
+        if cls._default_instance is not None:
+            cls._default_instance._handle_subjob_update_notification(local_job, subjob_data)
+
+    @classmethod
+    def wait_for_subjobs(cls, parent_job):
+        if cls._default_instance is not None:
+            cls._default_instance._wait_for_subjobs(parent_job)
+
+    @classmethod
+    def split_into_subjobs_async(cls, parent_worker, new_job_attributes, project_path, system_os=None):
+        if cls._default_instance is not None:
+            cls._default_instance._split_into_subjobs_async(parent_worker, new_job_attributes, project_path, system_os)
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
+
+    ZeroconfServer.configure("_zordon._tcp.local.", 'testing', 8080)
+    ZeroconfServer.start(listen_only=True)
+    print("Starting Zeroconf...")
+    time.sleep(2)
+    available_servers = DistributedJobManager.find_available_servers('blender')
+    print(f"AVAILABLE SERVERS ({len(available_servers)}): {available_servers}")
+    # results = distribute_server_work(1, 100, available_servers)
+    # print(f"RESULTS: {results}")
+    ZeroconfServer.stop()

src/engines/aerender/aerender_engine.py

@@ -8,7 +8,7 @@ class AERender(BaseRenderEngine):
     def version(self):
         version = None
         try:
-            render_path = self.renderer_path()
+            render_path = self.engine_path()
             if render_path:
                 ver_out = subprocess.check_output([render_path, '-version'], timeout=SUBPROCESS_TIMEOUT)
                 version = ver_out.decode('utf-8').split(" ")[-1].strip()

src/engines/blender/blender_downloader.py

@@ -1,5 +1,6 @@
 import logging
 import re
+import threading
 
 import requests
 
@@ -7,8 +8,7 @@ from src.engines.blender.blender_engine import Blender
 from src.engines.core.base_downloader import EngineDownloader
 from src.utilities.misc_helper import current_system_os, current_system_cpu
 
-# url = "https://download.blender.org/release/"
+url = "https://download.blender.org/release/"
-url = "https://ftp.nluug.nl/pub/graphics/blender/release/"  # much faster mirror for testing
 
 logger = logging.getLogger()
 supported_formats = ['.zip', '.tar.xz', '.dmg']
@@ -43,11 +43,13 @@ class BlenderDownloader(EngineDownloader):
             response = requests.get(base_url, timeout=5)
             response.raise_for_status()
 
-            versions_pattern = r'<a href="(?P<file>[^"]+)">blender-(?P<version>[\d\.]+)-(?P<system_os>\w+)-(?P<cpu>\w+).*</a>'
+            versions_pattern = \
+                r'<a href="(?P<file>[^"]+)">blender-(?P<version>[\d\.]+)-(?P<system_os>\w+)-(?P<cpu>\w+).*</a>'
             versions_data = [match.groupdict() for match in re.finditer(versions_pattern, response.text)]
 
             # Filter to just the supported formats
-            versions_data = [item for item in versions_data if any(item["file"].endswith(ext) for ext in supported_formats)]
+            versions_data = [item for item in versions_data if any(item["file"].endswith(ext) for ext in
+                                                                   supported_formats)]
 
             # Filter down OS and CPU
             system_os = system_os or current_system_os()
@@ -68,7 +70,7 @@ class BlenderDownloader(EngineDownloader):
 
     @staticmethod
     def __find_LTS_versions():
-        response = requests.get('https://www.blender.org/download/lts/')
+        response = requests.get('https://www.blender.org/download/lts/', timeout=5)
         response.raise_for_status()
 
         lts_pattern = r'https://www.blender.org/download/lts/(\d+-\d+)/'
@@ -78,6 +80,31 @@ class BlenderDownloader(EngineDownloader):
 
         return lts_versions
 
+    @classmethod
+    def all_versions(cls, system_os=None, cpu=None):
+        majors = cls.__get_major_versions()
+        all_versions = []
+        threads = []
+        results = [[] for _ in majors]
+
+        def thread_function(major_version, index, system_os_t, cpu_t):
+            results[index] = cls.__get_minor_versions(major_version, system_os_t, cpu_t)
+
+        for i, m in enumerate(majors):
+            thread = threading.Thread(target=thread_function, args=(m, i, system_os, cpu))
+            threads.append(thread)
+            thread.start()
+
+        # Wait for all threads to complete
+        for thread in threads:
+            thread.join()
+
+        # Extend all_versions with the results from each thread
+        for result in results:
+            all_versions.extend(result)
+
+        return all_versions
+
     @classmethod
     def find_most_recent_version(cls, system_os=None, cpu=None, lts_only=False):
         try:
@@ -98,18 +125,17 @@ class BlenderDownloader(EngineDownloader):
         return None
 
     @classmethod
-    def download_engine(cls, version, download_location, system_os=None, cpu=None, timeout=120):
+    def download_engine(cls, version, download_location, system_os=None, cpu=None, timeout=120, progress_callback=None):
         system_os = system_os or current_system_os()
         cpu = cpu or current_system_cpu()
 
         try:
             logger.info(f"Requesting download of blender-{version}-{system_os}-{cpu}")
             major_version = '.'.join(version.split('.')[:2])
-            minor_versions = [x for x in cls.__get_minor_versions(major_version, system_os, cpu) if x['version'] == version]
+            minor_versions = [x for x in cls.__get_minor_versions(major_version, system_os, cpu) if
-            # we get the URL instead of calculating it ourselves. May change this
+                              x['version'] == version]
-
             cls.download_and_extract_app(remote_url=minor_versions[0]['url'], download_location=download_location,
-                                           timeout=timeout)
+                                         timeout=timeout, progress_callback=progress_callback)
         except IndexError:
             logger.error("Cannot find requested engine")
 
@@ -117,5 +143,4 @@ class BlenderDownloader(EngineDownloader):
 if __name__ == '__main__':
     logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
 
-    print(BlenderDownloader.__get_major_versions())
+    print(BlenderDownloader.find_most_recent_version())
-

src/engines/blender/blender_engine.py

@@ -1,16 +1,17 @@
 import json
 import re
+from pathlib import Path
 
 from src.engines.core.base_engine import *
-from src.utilities.misc_helper import system_safe_path
 
 logger = logging.getLogger()
 
+_creationflags = subprocess.CREATE_NO_WINDOW if platform.system() == 'Windows' else 0
+
 
 class Blender(BaseRenderEngine):
 
     install_paths = ['/Applications/Blender.app/Contents/MacOS/Blender']
-    supported_extensions = ['.blend']
     binary_names = {'linux': 'blender', 'windows': 'blender.exe', 'macos': 'Blender'}
 
     @staticmethod
@@ -23,12 +24,23 @@ class Blender(BaseRenderEngine):
         from src.engines.blender.blender_worker import BlenderRenderWorker
         return BlenderRenderWorker
 
+    def ui_options(self):
+        options = [
+            {'name': 'engine', 'options': self.supported_render_engines()},
+            {'name': 'render_device', 'options': ['Any', 'GPU', 'CPU']},
+        ]
+        return options
+
+    def supported_extensions(self):
+        return ['blend']
+
     def version(self):
         version = None
         try:
-            render_path = self.renderer_path()
+            render_path = self.engine_path()
             if render_path:
-                ver_out = subprocess.check_output([render_path, '-v'], timeout=SUBPROCESS_TIMEOUT)
+                ver_out = subprocess.check_output([render_path, '-v'], timeout=SUBPROCESS_TIMEOUT,
+                                                  creationflags=_creationflags)
                 version = ver_out.decode('utf-8').splitlines()[0].replace('Blender', '').strip()
         except Exception as e:
             logger.error(f'Failed to get Blender version: {e}')
@@ -42,32 +54,43 @@ class Blender(BaseRenderEngine):
     def run_python_expression(self, project_path, python_expression, timeout=None):
         if os.path.exists(project_path):
             try:
-                return subprocess.run([self.renderer_path(), '-b', project_path, '--python-expr', python_expression],
+                return subprocess.run([self.engine_path(), '-b', project_path, '--python-expr', python_expression],
-                                      capture_output=True, timeout=timeout)
+                                      capture_output=True, timeout=timeout, creationflags=_creationflags)
             except Exception as e:
-                logger.error(f"Error running python expression in blender: {e}")
+                err_msg = f"Error running python expression in blender: {e}"
+                logger.error(err_msg)
+                raise ChildProcessError(err_msg)
         else:
             raise FileNotFoundError(f'Project file not found: {project_path}')
 
-    def run_python_script(self, project_path, script_path, timeout=None):
+    def run_python_script(self, script_path, project_path=None, timeout=None):
-        if os.path.exists(project_path) and os.path.exists(script_path):
+
-            try:
+        if project_path and not os.path.exists(project_path):
-                return subprocess.run([self.renderer_path(), '-b', project_path, '--python', script_path],
-                                      capture_output=True, timeout=timeout)
-            except Exception as e:
-                logger.warning(f"Error running python script in blender: {e}")
-                pass
-        elif not os.path.exists(project_path):
             raise FileNotFoundError(f'Project file not found: {project_path}')
         elif not os.path.exists(script_path):
             raise FileNotFoundError(f'Python script not found: {script_path}')
-        raise Exception("Uncaught exception")
+
+        try:
+            command = [self.engine_path(), '-b', '--python', script_path]
+            if project_path:
+                command.insert(2, project_path)
+            result = subprocess.run(command, capture_output=True, timeout=timeout, creationflags=_creationflags)
+            return result
+        except subprocess.TimeoutExpired:
+            err_msg = f"Timed out after {timeout}s while running python script in blender: {script_path}"
+            logger.error(err_msg)
+            raise TimeoutError(err_msg)
+        except Exception as e:
+            err_msg = f"Error running python script in blender: {e}"
+            logger.error(err_msg)
+            raise ChildProcessError(err_msg)
 
     def get_project_info(self, project_path, timeout=10):
         scene_info = {}
         try:
             script_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'scripts', 'get_file_info.py')
-            results = self.run_python_script(project_path, system_safe_path(script_path), timeout=timeout)
+            results = self.run_python_script(project_path=project_path, script_path=Path(script_path),
+                                             timeout=timeout)
             result_text = results.stdout.decode()
             for line in result_text.splitlines():
                 if line.startswith('SCENE_DATA:'):
@@ -77,15 +100,18 @@ class Blender(BaseRenderEngine):
                 elif line.startswith('Error'):
                     logger.error(f"get_scene_info error: {line.strip()}")
         except Exception as e:
-            logger.error(f'Error getting file details for .blend file: {e}')
+            msg = f'Error getting file details for .blend file: {e}'
+            logger.error(msg)
+            raise ChildProcessError(msg)
         return scene_info
 
-    def pack_project_file(self, project_path, timeout=30):
+    def pack_project_file(self, project_path, timeout=None):
         # Credit to L0Lock for pack script - https://blender.stackexchange.com/a/243935
         try:
             logger.info(f"Starting to pack Blender file: {project_path}")
             script_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'scripts', 'pack_project.py')
-            results = self.run_python_script(project_path, system_safe_path(script_path), timeout=timeout)
+            results = self.run_python_script(project_path=project_path, script_path=Path(script_path),
+                                             timeout=timeout)
 
             result_text = results.stdout.decode()
             dir_name = os.path.dirname(project_path)
@@ -93,7 +119,7 @@ class Blender(BaseRenderEngine):
             # report any missing textures
             not_found = re.findall("(Unable to pack file, source path .*)\n", result_text)
             for err in not_found:
-                logger.error(err)
+                raise ChildProcessError(err)
 
             p = re.compile('Saved to: (.*)\n')
             match = p.search(result_text)
@@ -101,12 +127,15 @@ class Blender(BaseRenderEngine):
                 new_path = os.path.join(dir_name, match.group(1).strip())
                 logger.info(f'Blender file packed successfully to {new_path}')
                 return new_path
+            return project_path
         except Exception as e:
-            logger.error(f'Error packing .blend file: {e}')
+            msg = f'Error packing .blend file: {e}'
+            logger.error(msg)
+            raise ChildProcessError(msg)
         return None
 
     def get_arguments(self):
-        help_text = subprocess.check_output([self.renderer_path(), '-h']).decode('utf-8')
+        help_text = subprocess.check_output([self.engine_path(), '-h'], creationflags=_creationflags).decode('utf-8')
         lines = help_text.splitlines()
 
         options = {}
@@ -137,31 +166,32 @@ class Blender(BaseRenderEngine):
 
         return options
 
-    def get_detected_gpus(self):
+    def system_info(self):
-        # no longer works on 4.0
+        return {'render_devices': self.get_render_devices(), 'engines': self.supported_render_engines()}
-        engine_output = subprocess.run([self.renderer_path(), '-E', 'help'], timeout=SUBPROCESS_TIMEOUT,
+
-                                       capture_output=True).stdout.decode('utf-8')
+    def get_render_devices(self):
-        gpu_names = re.findall(r"DETECTED GPU: (.+)", engine_output)
+        script_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'scripts', 'get_system_info.py')
-        return gpu_names
+        results = self.run_python_script(script_path=script_path)
+        output = results.stdout.decode()
+        match = re.search(r"GPU DATA:(\[.*?\])", output, re.DOTALL)
+        if match:
+            gpu_data_json = match.group(1)
+            gpus_info = json.loads(gpu_data_json)
+            return gpus_info
+        else:
+            logger.error("GPU data not found in the output.")
 
     def supported_render_engines(self):
-        engine_output = subprocess.run([self.renderer_path(), '-E', 'help'], timeout=SUBPROCESS_TIMEOUT,
+        engine_output = subprocess.run([self.engine_path(), '-b', '-E', 'help'], timeout=SUBPROCESS_TIMEOUT,
-                                       capture_output=True).stdout.decode('utf-8').strip()
+                                       capture_output=True, creationflags=_creationflags).stdout.decode('utf-8').strip()
         render_engines = [x.strip() for x in engine_output.split('Blender Engine Listing:')[-1].strip().splitlines()]
         return render_engines
 
-    # UI and setup
-    def get_options(self):
-        options = [
-            {'name': 'engine', 'options': self.supported_render_engines()},
-        ]
-        return options
-
     def perform_presubmission_tasks(self, project_path):
-        packed_path = self.pack_project_file(project_path, timeout=30)
+        packed_path = self.pack_project_file(project_path, timeout=120)
         return packed_path
 
 
 if __name__ == "__main__":
-    x = Blender.get_detected_gpus()
+    x = Blender().system_info()
     print(x)

src/engines/blender/blender_worker.py

@@ -12,41 +12,71 @@ class BlenderRenderWorker(BaseRenderWorker):
     engine = Blender
 
     def __init__(self, input_path, output_path, engine_path, args=None, parent=None, name=None):
-        super(BlenderRenderWorker, self).__init__(input_path=input_path, output_path=output_path,
+        super(BlenderRenderWorker, self).__init__(input_path=input_path, output_path=output_path, engine_path=engine_path, args=args, parent=parent, name=name)
-                                                  engine_path=engine_path, args=args, parent=parent, name=name)
-
-        # Args
-        self.blender_engine = self.args.get('engine', 'BLENDER_EEVEE').upper()
-        self.export_format = self.args.get('export_format', None) or 'JPEG'
-        self.camera = self.args.get('camera', None)
 
         # Stats
         self.__frame_percent_complete = 0.0
 
         # Scene Info
-        self.scene_info = Blender(engine_path).get_project_info(input_path)
+        self.scene_info = {}
-        self.start_frame = int(self.scene_info.get('start_frame', 1))
-        self.end_frame = int(self.scene_info.get('end_frame', self.start_frame))
-        self.project_length = (self.end_frame - self.start_frame) + 1
         self.current_frame = -1
 
     def generate_worker_subprocess(self):
 
-        cmd = [self.renderer_path]
+        self.scene_info = Blender(self.engine_path).get_project_info(self.input_path)
+
+        cmd = [self.engine_path]
         if self.args.get('background', True):  # optionally run render not in background
             cmd.append('-b')
         cmd.append(self.input_path)
 
-        # Python expressions
+        # Set Render Engine
+        blender_engine = self.args.get('engine')
+        if blender_engine:
+            blender_engine = blender_engine.upper()
+            cmd.extend(['-E', blender_engine])
+
+        # Start Python expressions - # todo: investigate splitting into separate 'setup' script
         cmd.append('--python-expr')
         python_exp = 'import bpy; bpy.context.scene.render.use_overwrite = False;'
-        if self.camera:
+
-            python_exp = python_exp + f"bpy.context.scene.camera = bpy.data.objects['{self.camera}'];"
+        # Setup Custom Resolution
-        # insert any other python exp checks here
+        if self.args.get('resolution'):
+            res = self.args.get('resolution')
+            python_exp += 'bpy.context.scene.render.resolution_percentage = 100;'
+            python_exp += f'bpy.context.scene.render.resolution_x={res[0]}; bpy.context.scene.render.resolution_y={res[1]};'
+
+        # Setup Custom Camera
+        custom_camera = self.args.get('camera', None)
+        if custom_camera:
+            python_exp += f"bpy.context.scene.camera = bpy.data.objects['{custom_camera}'];"
+
+        # Set Render Device for Cycles (gpu/cpu/any)
+        if blender_engine == 'CYCLES':
+            render_device = self.args.get('render_device', 'any').lower()
+            if render_device not in {'any', 'gpu', 'cpu'}:
+                raise AttributeError(f"Invalid Cycles render device: {render_device}")
+
+            use_gpu = render_device in {'any', 'gpu'}
+            use_cpu = render_device in {'any', 'cpu'}
+
+            python_exp = python_exp + ("exec(\"for device in bpy.context.preferences.addons["
+                                       f"'cycles'].preferences.devices: device.use = {use_cpu} if device.type == 'CPU'"
+                                       f" else {use_gpu}\")")
+
+        # -- insert any other python exp checks / generators here --
+
+        # End Python expressions here
         cmd.append(python_exp)
 
-        path_without_ext = os.path.splitext(self.output_path)[0] + "_"
+        # Export format
-        cmd.extend(['-E', self.blender_engine, '-o', path_without_ext, '-F', self.export_format])
+        export_format = self.args.get('export_format', None) or 'JPEG'
+
+        main_part, ext = os.path.splitext(self.output_path)
+        # Remove the extension only if it is not composed entirely of digits
+        path_without_ext = main_part if not ext[1:].isdigit() else self.output_path
+        path_without_ext += "_"
+        cmd.extend(['-o', path_without_ext, '-F', export_format])
 
         # set frame range
         cmd.extend(['-s', self.start_frame, '-e', self.end_frame, '-a'])
@@ -60,11 +90,15 @@ class BlenderRenderWorker(BaseRenderWorker):
 
     def _parse_stdout(self, line):
 
-        pattern = re.compile(
+        cycles_pattern = re.compile(
             r'Fra:(?P<frame>\d*).*Mem:(?P<memory>\S+).*Time:(?P<time>\S+)(?:.*Remaining:)?(?P<remaining>\S*)')
-        found = pattern.search(line)
+        cycles_match = cycles_pattern.search(line)
-        if found:
+        eevee_pattern = re.compile(
-            stats = found.groupdict()
+            r"Rendering\s+(?P<current>\d+)\s*/\s*(?P<total>\d+)\s+samples"
+        )
+        eevee_match = eevee_pattern.search(line)
+        if cycles_match:
+            stats = cycles_match.groupdict()
             memory_use = stats['memory']
             time_elapsed = stats['time']
             time_remaining = stats['remaining'] or 'Unknown'
@@ -79,27 +113,40 @@ class BlenderRenderWorker(BaseRenderWorker):
                 logger.debug(
                     'Frame:{0} | Mem:{1} | Time:{2} | Remaining:{3}'.format(self.current_frame, memory_use,
                                                                             time_elapsed, time_remaining))
+        elif eevee_match:
+            self.__frame_percent_complete = int(eevee_match.groups()[0]) / int(eevee_match.groups()[1])
+            logger.debug(f'Frame:{self.current_frame} | Samples:{eevee_match.groups()[0]}/{eevee_match.groups()[1]}')
+        elif "Rendering frame" in line: # used for eevee
+            self.current_frame = int(line.split("Rendering frame")[-1].strip())
         elif "file doesn't exist" in line.lower():
             self.log_error(line, halt_render=True)
         elif line.lower().startswith('error'):
             self.log_error(line)
         elif 'Saved' in line or 'Saving' in line or 'quit' in line:
-            match = re.match(r'Time: (.*) \(Saving', line)
+            render_stats_match = re.match(r'Time: (.*) \(Saving', line)
-            if match:
+            output_filename_match = re.match(r"Saved: .*_(\d+)\.\w+", line)  # try to get frame # from filename
-                time_completed = match.groups()[0]
+            if output_filename_match:
+                output_file_number = output_filename_match.groups()[0]
+                try:
+                    self.current_frame = int(output_file_number)
+                    self._send_frame_complete_notification()
+                except ValueError:
+                    pass
+            elif render_stats_match:
+                time_completed = render_stats_match.groups()[0]
                 frame_count = self.current_frame - self.end_frame + self.total_frames
                 logger.info(f'Frame #{self.current_frame} - '
                             f'{frame_count} of {self.total_frames} completed in {time_completed} | '
                             f'Total Elapsed Time: {datetime.now() - self.start_time}')
-            else:
-                logger.debug(line)
         else:
             pass
             # if len(line.strip()):
             #     logger.debug(line.strip())
 
     def percent_complete(self):
-        if self.total_frames <= 1:
+        if self.status == RenderStatus.COMPLETED:
+            return 1
+        elif self.total_frames <= 1:
             return self.__frame_percent_complete
         else:
             whole_frame_percent = (self.current_frame - self.start_frame) / self.total_frames

src/engines/blender/scripts/get_system_info.py

@@ -0,0 +1,21 @@
+import bpy
+import json
+
+# Force CPU rendering
+bpy.context.preferences.addons["cycles"].preferences.compute_device_type = "NONE"
+bpy.context.scene.cycles.device = "CPU"
+
+# Ensure Cycles is available
+bpy.context.preferences.addons['cycles'].preferences.get_devices()
+
+# Collect the devices information
+devices_info = []
+for device in bpy.context.preferences.addons['cycles'].preferences.devices:
+    devices_info.append({
+        "name": device.name,
+        "type": device.type,
+        "use": device.use
+    })
+
+# Print the devices information in JSON format
+print("GPU DATA:" + json.dumps(devices_info))

src/engines/core/base_downloader.py

@@ -1,9 +1,7 @@
 import logging
 import os
 import shutil
-import tarfile
 import tempfile
-import zipfile
 
 import requests
 from tqdm import tqdm
@@ -12,26 +10,154 @@ logger = logging.getLogger()
 
 
 class EngineDownloader:
+    """A class responsible for downloading and extracting rendering engines from publicly available URLs.
+
+    Attributes:
+        supported_formats (list[str]): A list of file formats supported by the downloader.
+    """
 
     supported_formats = ['.zip', '.tar.xz', '.dmg']
 
     def __init__(self):
         pass
 
+    # --------------------------------------------
+    # Required Overrides for Subclasses:
+    # --------------------------------------------
+
     @classmethod
     def find_most_recent_version(cls, system_os=None, cpu=None, lts_only=False):
-        raise NotImplementedError  # implement this method in your engine subclass
+        """
+        Finds the most recent version of the rendering engine available for download.
+
+        This method should be overridden in a subclass to implement the logic for determining
+        the most recent version of the rendering engine, optionally filtering by long-term
+        support (LTS) versions, the operating system, and CPU architecture.
+
+        Args:
+            system_os (str, optional): Desired OS ('linux', 'macos', 'windows'). Defaults to system os.
+            cpu (str, optional): The CPU architecture for which to download the engine. Default is system cpu.
+            lts_only (bool, optional): Limit the search to LTS (long-term support) versions only. Default is False.
+
+        Returns:
+            dict: A dict with the following keys:
+                - 'cpu' (str): The CPU architecture.
+                - 'system_os' (str): The operating system.
+                - 'file' (str): The filename of the version's download file.
+                - 'url' (str): The remote URL for downloading the version.
+                - 'version' (str): The version number.
+
+        Raises:
+            NotImplementedError: If the method is not overridden in a subclass.
+        """
+        raise NotImplementedError(f"find_most_recent_version not implemented for {cls.__class__.__name__}")
 
     @classmethod
     def version_is_available_to_download(cls, version, system_os=None, cpu=None):
-        raise NotImplementedError  # implement this method in your engine subclass
+        """Checks if a requested version of the rendering engine is available for download.
+
+        This method should be overridden in a subclass to implement the logic for determining
+        whether a given version of the rendering engine is available for download, based on the
+        operating system and CPU architecture.
+
+        Args:
+            version (str): The requested renderer version to download.
+            system_os (str, optional): Desired OS ('linux', 'macos', 'windows'). Defaults to system os.
+            cpu (str, optional): The CPU architecture for which to download the engine. Default is system cpu.
+
+        Returns:
+            bool: True if the version is available for download, False otherwise.
+
+        Raises:
+            NotImplementedError: If the method is not overridden in a subclass.
+        """
+        raise NotImplementedError(f"version_is_available_to_download not implemented for {cls.__class__.__name__}")
 
     @classmethod
-    def download_engine(cls, version, download_location, system_os=None, cpu=None, timeout=120):
+    def download_engine(cls, version, download_location, system_os=None, cpu=None, timeout=120, progress_callback=None):
-        raise NotImplementedError  # implement this method in your engine subclass
+        """Downloads the requested version of the rendering engine to the given download location.
+
+        This method should be overridden in a subclass to implement the logic for downloading
+        a specific version of the rendering engine. The method is intended to handle the
+        downloading process based on the version, operating system, CPU architecture, and
+        timeout parameters.
+
+        Args:
+            version (str): The requested renderer version to download.
+            download_location (str): The directory where the engine should be downloaded.
+            system_os (str, optional): Desired OS ('linux', 'macos', 'windows'). Defaults to system os.
+            cpu (str, optional): The CPU architecture for which to download the engine. Default is system cpu.
+            timeout (int, optional): The maximum time in seconds to wait for the download. Default is 120 seconds.
+            progress_callback (callable, optional): A callback function that is called periodically with the current download progress.
+
+        Raises:
+            NotImplementedError: If the method is not overridden in a subclass.
+        """
+        raise NotImplementedError(f"download_engine not implemented for {cls.__class__.__name__}")
+
+    # --------------------------------------------
+    # Optional Overrides for Subclasses:
+    # --------------------------------------------
 
     @classmethod
-    def download_and_extract_app(cls, remote_url, download_location, timeout=120):
+    def all_versions(cls, system_os=None, cpu=None):
+        """Retrieves a list of available versions of the software for a specific operating system and CPU architecture.
+
+        This method fetches all available versions for the given operating system and CPU type, constructing
+        a list of dictionaries containing details such as the version, CPU architecture, system OS, and the
+        remote URL for downloading each version.
+
+        Args:
+            system_os (str, optional): Desired OS ('linux', 'macos', 'windows'). Defaults to system os.
+            cpu (str, optional): The CPU architecture for which to download the engine. Default is system cpu.
+
+        Returns:
+            list[dict]: A list of dictionaries, each containing:
+                - 'cpu' (str): The CPU architecture.
+                - 'file' (str): The filename of the version's download file.
+                - 'system_os' (str): The operating system.
+                - 'url' (str): The remote URL for downloading the version.
+                - 'version' (str): The version number.
+        """
+        return []
+
+    # --------------------------------------------
+    # Do Not Override These Methods:
+    # --------------------------------------------
+
+    @classmethod
+    def download_and_extract_app(cls, remote_url, download_location, timeout=120, progress_callback=None):
+        """Downloads an application from the given remote URL and extracts it to the specified location.
+
+        This method handles the downloading of the application, supports multiple archive formats,
+        and extracts the contents to the specified `download_location`. It also manages temporary
+        files and logs progress throughout the process.
+
+        Args:
+            remote_url (str): The URL of the application to download.
+            download_location (str): The directory where the application should be extracted.
+            timeout (int, optional): The maximum time in seconds to wait for the download. Default is 120 seconds.
+            progress_callback (callable, optional): A callback function that is called periodically with the current download progress.
+
+        Returns:
+            str: The path to the directory where the application was extracted.
+
+        Raises:
+            Exception: Catches and logs any exceptions that occur during the download or extraction process.
+
+        Supported Formats:
+            - `.tar.xz`: Extracted using the `tarfile` module.
+            - `.zip`: Extracted using the `zipfile` module.
+            - `.dmg`: macOS disk image files, handled using the `dmglib` library.
+            - Other formats will result in an error being logged.
+
+        Notes:
+            - If the application already exists in the `download_location`, the method will log an error
+              and return without downloading or extracting.
+            - Temporary files created during the download process are cleaned up after completion.
+        """
+        if progress_callback:
+            progress_callback(0)
 
         # Create a temp download directory
         temp_download_dir = tempfile.mkdtemp()
@@ -44,7 +170,7 @@ class EngineDownloader:
 
             if os.path.exists(os.path.join(download_location, output_dir_name)):
                 logger.error(f"Engine download for {output_dir_name} already exists")
-                return
+                return None
 
             if not os.path.exists(temp_downloaded_file_path):
                 # Make a GET request to the URL with stream=True to enable streaming
@@ -60,26 +186,33 @@ class EngineDownloader:
                     progress_bar = tqdm(total=file_size, unit="B", unit_scale=True)
 
                     # Open a file for writing in binary mode
+                    total_saved = 0
                     with open(temp_downloaded_file_path, "wb") as file:
                         for chunk in response.iter_content(chunk_size=1024):
                             if chunk:
                                 # Write the chunk to the file
                                 file.write(chunk)
+                                total_saved += len(chunk)
                                 # Update the progress bar
                                 progress_bar.update(len(chunk))
+                                if progress_callback:
+                                    percent = float(total_saved) / float(file_size)
+                                    progress_callback(percent)
 
                     # Close the progress bar
+                    progress_callback(1.0)
                     progress_bar.close()
                     logger.info(f"Successfully downloaded {os.path.basename(temp_downloaded_file_path)}")
                 else:
                     logger.error(f"Failed to download the file. Status code: {response.status_code}")
-                    return
+                    return None
 
             os.makedirs(download_location, exist_ok=True)
 
             # Extract the downloaded file
             # Process .tar.xz files
             if temp_downloaded_file_path.lower().endswith('.tar.xz'):
+                import tarfile
                 try:
                     with tarfile.open(temp_downloaded_file_path, 'r:xz') as tar:
                         tar.extractall(path=download_location)
@@ -93,12 +226,13 @@ class EngineDownloader:
 
             # Process .zip files
             elif temp_downloaded_file_path.lower().endswith('.zip'):
+                import zipfile
                 try:
                     with zipfile.ZipFile(temp_downloaded_file_path, 'r') as zip_ref:
                         zip_ref.extractall(download_location)
                     logger.info(
                         f'Successfully extracted {os.path.basename(temp_downloaded_file_path)} to {download_location}')
-                except zipfile.BadZipFile as e:
+                except zipfile.BadZipFile:
                     logger.error(f'Error: {temp_downloaded_file_path} is not a valid ZIP file.')
                 except FileNotFoundError:
                     logger.error(f'File not found: {temp_downloaded_file_path}')
@@ -110,7 +244,8 @@ class EngineDownloader:
                 for mount_point in dmg.attach():
                     try:
                         copy_directory_contents(mount_point, os.path.join(download_location, output_dir_name))
-                        logger.info(f'Successfully copied {os.path.basename(temp_downloaded_file_path)} to {download_location}')
+                        logger.info(f'Successfully copied {os.path.basename(temp_downloaded_file_path)} '
+                                    f'to {download_location}')
                     except FileNotFoundError:
                         logger.error(f'Error: The source .app bundle does not exist.')
                     except PermissionError:

src/engines/core/base_engine.py

@@ -1,31 +1,196 @@
 import logging
 import os
+import platform
 import subprocess
+from typing import Optional, List, Dict, Any, Type
 
 logger = logging.getLogger()
-SUBPROCESS_TIMEOUT = 5
+SUBPROCESS_TIMEOUT = 10
 
 
 class BaseRenderEngine(object):
+    """Base class for render engines. This class provides common functionality and structure for various rendering
+    engines. Create subclasses and override the methods marked below to add additional engines
 
-    install_paths = []
+    Attributes:
-    supported_extensions = []
+        install_paths (list): A list of default installation paths where the render engine
+        might be found. This list can be populated with common paths to help locate the
+        executable on different operating systems or environments.
+    """
 
-    def __init__(self, custom_path=None):
+    install_paths: List[str] = []
-        self.custom_renderer_path = custom_path
+    binary_names: Dict[str, str] = {}
-        if not self.renderer_path():
-            raise FileNotFoundError(f"Cannot find path to renderer for {self.name()} instance")
 
-    def renderer_path(self):
+    # --------------------------------------------
-        return self.custom_renderer_path or self.default_renderer_path()
+    # Required Overrides for Subclasses:
+    # --------------------------------------------
+
+    def __init__(self, custom_path: Optional[str] = None) -> None:
+        """Initialize the render engine.
+
+        Args:
+            custom_path: Optional custom path to the engine executable.
+            
+        Raises:
+            FileNotFoundError: If the engine executable cannot be found.
+        """
+        self.custom_engine_path: Optional[str] = custom_path
+        if not self.engine_path() or not os.path.exists(self.engine_path()):
+            raise FileNotFoundError(f"Cannot find path to engine for {self.name()} instance: {self.engine_path()}")
+
+        if not os.access(self.engine_path(), os.X_OK):
+            logger.warning(f"Path is not executable. Setting permissions to 755 for {self.engine_path()}")
+            os.chmod(self.engine_path(), 0o755)
+
+    def version(self) -> str:
+        """Return the version number as a string.
+
+        Returns:
+            str: Version number.
+
+        Raises:
+            NotImplementedError: If not overridden.
+        """
+        raise NotImplementedError(f"version not implemented for {self.__class__.__name__}")
+
+    def get_project_info(self, project_path: str, timeout: int = 10) -> Dict[str, Any]:
+        """Extracts detailed project information from the given project path.
+
+        Args:
+            project_path (str): The path to the project file.
+            timeout (int, optional): The maximum time (in seconds) to wait for the operation. Default is 10 seconds.
+
+        Returns:
+            dict: A dictionary containing project information (subclasses should define the structure).
+
+        Raises:
+            NotImplementedError: If the method is not overridden in a subclass.
+        """
+        raise NotImplementedError(f"get_project_info not implemented for {self.__class__.__name__}")
 
     @classmethod
-    def name(cls):
+    def get_output_formats(cls) -> List[str]:
+        """Returns a list of available output formats supported by the engine.
+
+        Returns:
+            list[str]: A list of strings representing the available output formats.
+        """
+        raise NotImplementedError(f"get_output_formats not implemented for {cls.__name__}")
+
+    @staticmethod
+    def worker_class() -> Type[Any]:  # override when subclassing to link worker class
+        raise NotImplementedError("Worker class not implemented")
+
+    # --------------------------------------------
+    # Optional Overrides for Subclasses:
+    # --------------------------------------------
+
+    def supported_extensions(self) -> List[str]:
+        """Return a list of file extensions supported by this engine.
+
+        Returns:
+            List[str]: List of supported file extensions (e.g., ['.blend', '.mp4']).
+        """
+        return []
+
+    def get_help(self) -> str:
+        """Retrieves the help documentation for the engine.
+
+        This method runs the engine's help command (default: '-h') and captures the output.
+        Override this method if the engine uses a different help flag.
+
+        Returns:
+            str: The help documentation as a string.
+
+        Raises:
+            FileNotFoundError: If the engine path is not found.
+        """
+        path = self.engine_path()
+        if not path:
+            raise FileNotFoundError(f"Engine path not found: {path}")
+        creationflags = subprocess.CREATE_NO_WINDOW if platform.system() == 'Windows' else 0
+        help_doc = subprocess.check_output([path, '-h'], stderr=subprocess.STDOUT,
+                                           timeout=SUBPROCESS_TIMEOUT, creationflags=creationflags).decode('utf-8')
+        return help_doc
+
+    def system_info(self) -> Dict[str, Any]:
+        """Return additional information about the system specfic to the engine (configured GPUs, render engines, etc)
+
+        Returns:
+            dict: A dictionary with engine-specific system information
+        """
+        return {}
+
+    def perform_presubmission_tasks(self, project_path: str) -> str:
+        """Perform any pre-submission tasks on a project file before uploading it to a server (pack textures, etc.)
+
+        Override this method to:
+            1. Copy the project file to a temporary location (DO NOT MODIFY ORIGINAL PATH).
+            2. Perform additional modifications or tasks.
+            3. Return the path to the modified project file.
+
+        Args:
+            project_path (str): The original project file path.
+
+        Returns:
+            str: The path to the modified project file.
+        """
+        return project_path
+
+    def get_arguments(self) -> Dict[str, Any]:
+        """Return command-line arguments for this engine.
+
+        Returns:
+            Dict[str, Any]: Dictionary of argument specifications.
+        """
+        return {}
+
+    @staticmethod
+    def downloader() -> Optional[Any]:
+        """Return the downloader class for this engine.
+
+        Returns:
+            Optional[Any]: Downloader class instance, or None if no downloader is used.
+        """
+        return None
+
+    def ui_options(self) -> Dict[str, Any]:
+        """Return UI configuration options for this engine.
+
+        Returns:
+            Dict[str, Any]: Dictionary of UI options and their configurations.
+        """
+        return {}
+
+    # --------------------------------------------
+    # Do Not Override These Methods:
+    # --------------------------------------------
+
+    def engine_path(self) -> Optional[str]:
+        """Return the path to the engine executable.
+
+        Returns:
+            Optional[str]: Path to the engine executable, or None if not found.
+        """
+        return self.custom_engine_path or self.default_engine_path()
+
+    @classmethod
+    def name(cls) -> str:
+        """Return the name of this engine.
+
+        Returns:
+            str: Engine name in lowercase.
+        """
         return str(cls.__name__).lower()
 
     @classmethod
-    def default_renderer_path(cls):
+    def default_engine_path(cls) -> Optional[str]:
-        path = None
+        """Find the default path to the engine executable.
+
+        Returns:
+            Optional[str]: Default path to the engine executable, or None if not found.
+        """
+        path: Optional[str] = None
         try:  # Linux and macOS
             path = subprocess.check_output(['which', cls.name()], timeout=SUBPROCESS_TIMEOUT).decode('utf-8').strip()
         except (subprocess.CalledProcessError, FileNotFoundError):
@@ -35,37 +200,3 @@ class BaseRenderEngine(object):
         except Exception as e:
             logger.exception(e)
         return path
-
-    def version(self):
-        raise NotImplementedError("version not implemented")
-
-    @staticmethod
-    def downloader():  # override when subclassing if using a downloader class
-        return None
-
-    @staticmethod
-    def worker_class():  # override when subclassing to link worker class
-        raise NotImplementedError("Worker class not implemented")
-
-    def get_help(self):
-        path = self.renderer_path()
-        if not path:
-            raise FileNotFoundError("renderer path not found")
-        help_doc = subprocess.check_output([path, '-h'], stderr=subprocess.STDOUT,
-                                           timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
-        return help_doc
-
-    def get_project_info(self, project_path, timeout=10):
-        raise NotImplementedError(f"get_project_info not implemented for {cls.__name__}")
-
-    @classmethod
-    def get_output_formats(cls):
-        raise NotImplementedError(f"get_output_formats not implemented for {cls.__name__}")
-
-    @classmethod
-    def get_arguments(cls):
-        pass
-
-    def perform_presubmission_tasks(self, project_path):
-        return project_path
-

src/engines/core/base_worker.py

@@ -3,14 +3,18 @@ import io
 import json
 import logging
 import os
+import signal
 import subprocess
 import threading
+import time
 from datetime import datetime
+from typing import Optional, Dict, Any, List, Union
 
 import psutil
 from pubsub import pub
 from sqlalchemy import Column, Integer, String, DateTime, JSON
 from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.ext.mutable import MutableDict
 
 from src.utilities.misc_helper import get_time_elapsed
 from src.utilities.status_utils import RenderStatus, string_to_status
@@ -23,60 +27,81 @@ class BaseRenderWorker(Base):
     __tablename__ = 'render_workers'
 
     id = Column(String, primary_key=True)
+    hostname = Column(String, nullable=True)
     input_path = Column(String)
     output_path = Column(String)
     date_created = Column(DateTime)
     start_time = Column(DateTime, nullable=True)
     end_time = Column(DateTime, nullable=True)
-    renderer = Column(String)
+    engine_name = Column(String)
-    renderer_version = Column(String)
+    engine_version = Column(String)
-    renderer_path = Column(String)
+    engine_path = Column(String)
     priority = Column(Integer)
-    project_length = Column(Integer)
     start_frame = Column(Integer)
     end_frame = Column(Integer, nullable=True)
     parent = Column(String, nullable=True)
-    children = Column(JSON)
+    children = Column(MutableDict.as_mutable(JSON))
+    args = Column(MutableDict.as_mutable(JSON))
     name = Column(String)
     file_hash = Column(String)
     _status = Column(String)
 
-    engine = None
+    # --------------------------------------------
+    # Required Overrides for Subclasses:
+    # --------------------------------------------
 
-    def __init__(self, input_path, output_path, engine_path, priority=2, args=None, ignore_extensions=True, parent=None,
+    def __init__(self, input_path: str, output_path: str, engine_path: str, priority: int = 2,
-                 name=None):
+                 args: Optional[Dict[str, Any]] = None, ignore_extensions: bool = True,
+                 parent: Optional[str] = None, name: Optional[str] = None) -> None:
+        """Initialize a render worker.
 
+        Args:
+            input_path: Path to the input project file.
+            output_path: Path where output files will be saved.
+            engine_path: Path to the render engine executable.
+            priority: Job priority level (default: 2).
+            args: Additional arguments for the render job.
+            ignore_extensions: Whether to ignore file extension validation.
+            parent: Parent job ID for distributed jobs.
+            name: Custom name for the job.
+
+        Raises:
+            ValueError: If file extension is not supported.
+            NotImplementedError: If engine is not defined.
+        """
         if not ignore_extensions:
-            if not any(ext in input_path for ext in self.engine.supported_extensions):
+            if not any(ext in input_path for ext in self.engine.supported_extensions()):
-                err_meg = f'Cannot find valid project with supported file extension for {self.engine.name()} renderer'
+                err_meg = f"Cannot find valid project with supported file extension for '{self.engine.name()}'"
                 logger.error(err_meg)
                 raise ValueError(err_meg)
         if not self.engine:
-            raise NotImplementedError("Engine not defined")
+            raise NotImplementedError(f"Engine not defined for {self.__class__.__name__}")
 
         def generate_id():
+            """Generate a unique job ID."""
             import uuid
             return str(uuid.uuid4()).split('-')[0]
 
         # Essential Info
         self.id = generate_id()
+        self.hostname = None
         self.input_path = input_path
         self.output_path = output_path
         self.args = args or {}
         self.date_created = datetime.now()
-        self.renderer = self.engine.name()
+        self.engine_name = self.engine.name()
-        self.renderer_path = engine_path
+        self.engine_path = engine_path
-        self.renderer_version = self.engine(engine_path).version()
+        self.engine_version = self.engine(engine_path).version()
-        self.custom_renderer_path = None
+        self.custom_engine_path = None
         self.priority = priority
         self.parent = parent
         self.children = {}
         self.name = name or os.path.basename(input_path)
+        self.maximum_attempts = 3
 
         # Frame Ranges
-        self.project_length = -1
+        self.current_frame = 0
-        self.current_frame = 0  # should this be a 1 ?
+        self.start_frame = 0
-        self.start_frame = 0  # should this be a 1 ?
         self.end_frame = None
 
         # Logging
@@ -89,14 +114,73 @@ class BaseRenderWorker(Base):
         self.errors = []
 
         # Threads and processes
-        self.__thread = threading.Thread(target=self.run, args=())
+        self.__thread = threading.Thread(target=self.__run, args=())
         self.__thread.daemon = True
         self.__process = None
         self.last_output = None
+        self.__last_output_time = None
+        self.watchdog_timeout = 120
+
+    def generate_worker_subprocess(self) -> List[str]:
+        """Generate a return a list of the command line arguments necessary to perform requested job
+
+        Returns:
+            list[str]: list of command line arguments
+        """
+        raise NotImplementedError("generate_worker_subprocess not implemented")
+
+    def _parse_stdout(self, line: str) -> None:
+        """Parses a line of standard output from the engine.
+
+        This method should be overridden in a subclass to implement the logic for processing
+        and interpreting a single line of output from the engine's standard output stream.
+
+        On frame completion, the subclass should:
+            1. Update value of self.current_frame
+            2. Call self._send_frame_complete_notification()
+
+        Args:
+            line (str): A line of text from the engine's standard output.
+
+        Raises:
+            NotImplementedError: If the method is not overridden in a subclass.
+        """
+        raise NotImplementedError(f"_parse_stdout not implemented for {self.__class__.__name__}")
+
+    # --------------------------------------------
+    # Optional Overrides for Subclasses:
+    # --------------------------------------------
+
+    def percent_complete(self) -> float:
+        """Return the completion percentage of this job.
+
+        Returns:
+            float: Completion percentage between 0.0 and 1.0.
+        """
+        # todo: fix this
+        if self.status == RenderStatus.COMPLETED:
+            return 1.0
+        return 0
+
+    def post_processing(self) -> None:
+        """Override to perform any engine-specific postprocessing"""
+        pass
+
+    # --------------------------------------------
+    # Do Not Override These Methods:
+    # --------------------------------------------
+
+    def __repr__(self):
+        """Return string representation of the worker.
+
+        Returns:
+            str: String representation showing job details.
+        """
+        return f"<Job id:{self.id} p{self.priority} {self.engine_name}-{self.engine_version} '{self.name}' status:{self.status.value}>"
 
     @property
     def total_frames(self):
-        return (self.end_frame or self.project_length) - self.start_frame + 1
+        return max(self.end_frame, 1) - self.start_frame + 1
 
     @property
     def status(self):
@@ -116,158 +200,316 @@ class BaseRenderWorker(Base):
                 self._status = RenderStatus.CANCELLED.value
         return string_to_status(self._status)
 
-    def validate(self):
+    def _send_frame_complete_notification(self):
-        if not os.path.exists(self.input_path):
+        pub.sendMessage('frame_complete', job_id=self.id, frame_number=self.current_frame)
-            raise FileNotFoundError(f"Cannot find input path: {self.input_path}")
-        self.generate_subprocess()
 
     def generate_subprocess(self):
+        """Generate subprocess command arguments.
+
+        Returns:
+            List[str]: List of command line arguments for the subprocess.
+
+        Raises:
+            ValueError: If argument conflicts are detected.
+        """
         # Convert raw args from string if available and catch conflicts
         generated_args = [str(x) for x in self.generate_worker_subprocess()]
         generated_args_flags = [x for x in generated_args if x.startswith('-')]
         if len(generated_args_flags) != len(set(generated_args_flags)):
-            msg = "Cannot generate subprocess - Multiple arg conflicts detected"
+            msg = f"Cannot generate subprocess - Multiple arg conflicts detected: {generated_args}"
             logger.error(msg)
-            logger.debug(f"Generated args for subprocess: {generated_args}")
             raise ValueError(msg)
         return generated_args
 
     def get_raw_args(self):
-        raw_args_string = self.args.get('raw', None)
+        """Parse raw command line arguments from args dictionary.
+
+        Returns:
+            Optional[List[str]]: Parsed raw arguments, or None if no raw args.
+        """
+        raw_args_string = self.args.get('raw', '')
         raw_args = None
         if raw_args_string:
             import shlex
             raw_args = shlex.split(raw_args_string)
         return raw_args
 
-    def generate_worker_subprocess(self):
-        raise NotImplementedError("generate_worker_subprocess not implemented")
-
     def log_path(self):
+        """Generate the log file path for this job.
+
+        Returns:
+            str: Path to the log file.
+        """
         filename = (self.name or os.path.basename(self.input_path)) + '_' + \
                    self.date_created.strftime("%Y.%m.%d_%H.%M.%S") + '.log'
         return os.path.join(os.path.dirname(self.input_path), filename)
 
     def start(self):
+        """Start the render job.
 
-        if self.status not in [RenderStatus.SCHEDULED, RenderStatus.NOT_STARTED]:
+        Validates input paths and engine availability, then starts the render thread.
+        """
+        if self.status not in [RenderStatus.SCHEDULED, RenderStatus.NOT_STARTED, RenderStatus.CONFIGURING]:
             logger.error(f"Trying to start job with status: {self.status}")
             return
 
         if not os.path.exists(self.input_path):
             self.status = RenderStatus.ERROR
-            msg = 'Cannot find input path: {}'.format(self.input_path)
+            msg = f'Cannot find input path: {self.input_path}'
             logger.error(msg)
             self.errors.append(msg)
             return
 
-        if not os.path.exists(self.renderer_path):
+        if not os.path.exists(self.engine_path):
             self.status = RenderStatus.ERROR
-            msg = 'Cannot find render engine path for {}'.format(self.engine.name())
+            msg = f'Cannot find render engine path for {self.engine.name()}'
             logger.error(msg)
             self.errors.append(msg)
             return
 
-        self.status = RenderStatus.RUNNING
+        self.status = RenderStatus.RUNNING if not self.children else RenderStatus.WAITING_FOR_SUBJOBS
         self.start_time = datetime.now()
-        logger.info(f'Starting {self.engine.name()} {self.renderer_version} Render for {self.input_path} | '
-                    f'Frame Count: {self.total_frames}')
         self.__thread.start()
 
-    def run(self):
+    # handle multiple attempts at running subprocess
+    def __run__subprocess_cycle(self, log_file):
+        subprocess_cmds = self.generate_subprocess()
+        initial_file_count = len(self.file_list())
+        failed_attempts = 0
+
+        log_file.write(f"Running command: {subprocess_cmds}\n")
+        log_file.write('=' * 80 + '\n\n')
+
+        while True:
+            # Log attempt #
+            if failed_attempts:
+                if failed_attempts >= self.maximum_attempts:
+                    err_msg = f"Maximum attempts exceeded ({self.maximum_attempts})"
+                    logger.error(err_msg)
+                    self.status = RenderStatus.ERROR
+                    self.errors.append(err_msg)
+                    return
+                else:
+                    log_file.write(f'\n{"=" * 20} Attempt #{failed_attempts + 1} {"=" * 20}\n\n')
+                    logger.warning(f"Restarting render - Attempt #{failed_attempts + 1}")
+                    self.status = RenderStatus.RUNNING
+
+            return_code = self.__setup_and_run_process(log_file, subprocess_cmds)
+
+            message = f"{'=' * 50}\n\n{self.engine.name()} render ended with code {return_code} " \
+                      f"after {self.time_elapsed()}\n\n"
+            log_file.write(message)
+
+            # don't try again if we've been cancelled
+            if self.status in [RenderStatus.CANCELLED, RenderStatus.ERROR]:
+                return
+
+            # if file output hasn't increased, return as error, otherwise restart process.
+            file_count_has_increased = len(self.file_list()) > initial_file_count
+            if (self.status == RenderStatus.RUNNING) and file_count_has_increased and not return_code:
+                break
+
+            if return_code:
+                err_msg = f"{self.engine.name()} render failed with code {return_code}"
+                logger.error(err_msg)
+                self.errors.append(err_msg)
+
+            # handle instances where engine exits ok but doesnt generate files
+            if not return_code and not file_count_has_increased:
+                err_msg = (f"{self.engine.name()} render exited ok, but file count has not increased. "
+                           f"Count is still {len(self.file_list())}")
+                log_file.write(f'Error: {err_msg}\n\n')
+                self.errors.append(err_msg)
+
+            # only count the attempt as failed if engine creates no output - reset counter on successful output
+            failed_attempts = 0 if file_count_has_increased else failed_attempts + 1
+
+    def __run__wait_for_subjobs(self, logfile):
+        from src.distributed_job_manager import DistributedJobManager
+        DistributedJobManager.wait_for_subjobs(parent_job=self)
+
+    @staticmethod
+    def log_and_print(message, log_file, level='info'):
+        if level == 'debug':
+            logger.debug(message)
+        elif level == 'error':
+            logger.error(message)
+        else:
+            logger.info(message)
+        log_file.write(f"{message}\n")
+
+    def __run(self):
+
         # Setup logging
         log_dir = os.path.dirname(self.log_path())
         os.makedirs(log_dir, exist_ok=True)
 
-        subprocess_cmds = self.generate_subprocess()
+        with open(self.log_path(), "a") as log_file:
-        initial_file_count = len(self.file_list())
-        attempt_number = 0
 
-        with open(self.log_path(), "a") as f:
+            self.log_and_print(f"{self.start_time.isoformat()} - Starting "
+                               f"{self.engine.name()} {self.engine_version} render job for {self.name} "
+                               f"({self.input_path})", log_file)
+            log_file.write(f"\n")
+            if not self.children:
+                self.__run__subprocess_cycle(log_file)
+            else:
+                self.__run__wait_for_subjobs(log_file)
 
-            f.write(f"{self.start_time.isoformat()} - Starting {self.engine.name()} {self.renderer_version} "
+            # Validate Output - End if missing frames
-                    f"render for {self.input_path}\n\n")
+            if self.status == RenderStatus.RUNNING:
-            f.write(f"Running command: {subprocess_cmds}\n")
+                file_list_length = len(self.file_list())
-            f.write('=' * 80 + '\n\n')
+                expected_list_length = (self.end_frame - self.start_frame + 1) if self.end_frame else 1
 
-            while True:
+                msg = f"Frames: Expected ({expected_list_length}) vs actual ({file_list_length}) for {self}"
-                # Log attempt #
+                self.log_and_print(msg, log_file, 'debug')
-                if attempt_number:
-                    f.write(f'\n{"=" * 80} Attempt #{attempt_number} {"=" * 30}\n\n')
-                    logger.warning(f"Restarting render - Attempt #{attempt_number}")
-                attempt_number += 1
 
-                # Start process and get updates
+                if file_list_length not in (expected_list_length, 1):
-                self.__process = subprocess.Popen(subprocess_cmds, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
+                    msg = f"Missing frames: Expected ({expected_list_length}) vs actual ({file_list_length})"
-                                                  universal_newlines=False)
+                    self.log_and_print(msg, log_file, 'error')
-
+                    self.errors.append(msg)
-                for c in io.TextIOWrapper(self.__process.stdout, encoding="utf-8"):  # or another encoding
-                    f.write(c)
-                    self.last_output = c.strip()
-                    self._parse_stdout(c.strip())
-
-                f.write('\n')
-
-                # Check return codes and process
-                return_code = self.__process.wait()
-                self.end_time = datetime.now()
-
-                if self.status in [RenderStatus.CANCELLED, RenderStatus.ERROR]:  # user cancelled
-                    message = f"{self.engine.name()} render ended with status '{self.status}' " \
-                              f"after {self.time_elapsed()}"
-                    f.write(message)
-                    return
-
-                if not return_code:
-                    message = f"{'=' * 50}\n\n{self.engine.name()} render completed successfully in {self.time_elapsed()}"
-                    f.write(message)
-                    break
-
-                # Handle non-zero return codes
-                message = f"{'=' * 50}\n\n{self.engine.name()} render failed with code {return_code} " \
-                          f"after {self.time_elapsed()}"
-                f.write(message)
-                self.errors.append(message)
-
-                # if file output hasn't increased, return as error, otherwise restart process.
-                if len(self.file_list()) <= initial_file_count:
                     self.status = RenderStatus.ERROR
-                    return
+                    # todo: create new subjob to generate missing frames
 
-        if self.children:
+            # cleanup and close if cancelled / error
-            from src.distributed_job_manager import DistributedJobManager
+            if self.status in [RenderStatus.CANCELLED, RenderStatus.ERROR]:
-            DistributedJobManager.wait_for_subjobs(local_job=self)
+                self.end_time = datetime.now()
+                message = f"{self.engine.name()} render ended with status '{self.status.value}' " \
+                          f"after {self.time_elapsed()}"
+                self.log_and_print(message, log_file)
+                log_file.close()
+                return
 
-        # Post Render Work
+            # Post Render Work
-        logger.debug("Starting post-processing work")
+            if not self.parent:
-        self.post_processing()
+                logger.debug(f"Starting post-processing work for {self}")
-        self.status = RenderStatus.COMPLETED
+                self.log_and_print(f"Starting post-processing work for {self}", log_file, 'debug')
-        logger.info(f"Render {self.id}-{self.name} completed successfully after {self.time_elapsed()}")
+                self.post_processing()
+                self.log_and_print(f"Completed post-processing work for {self}", log_file, 'debug')
 
-    def post_processing(self):
+            self.status = RenderStatus.COMPLETED
-        pass
+            self.end_time = datetime.now()
+            message = f"Render {self.name} completed successfully after {self.time_elapsed()}"
+            self.log_and_print(message, log_file)
+
+    def __setup_and_run_process(self, f, subprocess_cmds):
+
+        def watchdog():
+            logger.debug(f'Starting process watchdog for {self} with {self.watchdog_timeout}s timeout')
+            while self.__process.poll() is None:
+                time_since_last_update = time.time() - self.__last_output_time
+                if time_since_last_update > self.watchdog_timeout:
+                    logger.error(f"Process for {self} terminated due to exceeding timeout ({self.watchdog_timeout}s)")
+                    self.__kill_process()
+                    break
+                # logger.debug(f'Watchdog for {self} - Time since last update: {time_since_last_update}')
+                time.sleep(1)
+
+            logger.debug(f'Stopping process watchdog for {self}')
+
+        return_code = -1
+        watchdog_thread = threading.Thread(target=watchdog)
+        watchdog_thread.daemon = True
+
+        try:
+            # Start process and get updates
+            if os.name == 'posix':  # linux / mac
+                self.__process = subprocess.Popen(subprocess_cmds, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
+                                                  universal_newlines=False, preexec_fn=os.setsid)
+            else:  # windows
+                creationflags = subprocess.CREATE_NEW_PROCESS_GROUP | subprocess.CREATE_NO_WINDOW
+                self.__process = subprocess.Popen(subprocess_cmds, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
+                                                  universal_newlines=False,
+                                                  creationflags=creationflags)
+
+            # Start watchdog
+            self.__last_output_time = time.time()
+            watchdog_thread.start()
+
+            for c in io.TextIOWrapper(self.__process.stdout, encoding="utf-8"):  # or another encoding
+                self.last_output = c.strip()
+                self.__last_output_time = time.time()
+                try:
+                    f.write(c)
+                    f.flush()
+                    os.fsync(f.fileno())
+                except Exception as e:
+                    logger.error(f"Error saving log to disk: {e}")
+
+                try:
+                    self._parse_stdout(c.strip())
+                except Exception as e:
+                    logger.error(f'Error parsing stdout: {e}')
+
+            f.write('\n')
+
+            # Check return codes and process
+            return_code = self.__process.wait()
+        except Exception as e:
+            message = f'Uncaught error running render process: {e}'
+            f.write(message)
+            logger.exception(message)
+            self.__kill_process()
+
+        # let watchdog end before continuing - prevents multiple watchdogs running when process restarts
+        if watchdog_thread.is_alive():
+            watchdog_thread.join()
+
+        return return_code
+
+    def __kill_process(self):
+        try:
+            if self.__process.poll():
+                return
+            logger.debug(f"Trying to kill process {self.__process}")
+            self.__process.terminate()
+            self.__process.kill()
+            if os.name == 'posix':  # linux / macos
+                os.killpg(os.getpgid(self.__process.pid), signal.SIGTERM)
+                os.killpg(os.getpgid(self.__process.pid), signal.SIGKILL)
+            else:  # windows
+                parent = psutil.Process(self.__process.pid)
+                for child in parent.children(recursive=True):
+                    child.kill()
+            self.__process.wait(timeout=5)
+            logger.debug(f"Process ended with status {self.__process.poll()}")
+        except (ProcessLookupError, AttributeError, psutil.NoSuchProcess):
+            pass
+        except Exception as e:
+            logger.error(f"Error stopping the process: {e}")
 
     def is_running(self):
-        if self.__thread:
+        """Check if the render job is currently running.
+
+        Returns:
+            bool: True if the job is running, False otherwise.
+        """
+        if hasattr(self, '__thread'):
             return self.__thread.is_alive()
         return False
 
     def log_error(self, error_line, halt_render=False):
+        """Log an error and optionally halt the render.
+
+        Args:
+            error_line: Error message to log.
+            halt_render: Whether to stop the render due to this error.
+        """
         logger.error(error_line)
         self.errors.append(error_line)
         if halt_render:
             self.stop(is_error=True)
 
     def stop(self, is_error=False):
-        if hasattr(self, '__process'):
+        """Stop the render job.
-            try:
+
-                process = psutil.Process(self.__process.pid)
+        Args:
-                for proc in process.children(recursive=True):
+            is_error: Whether this stop is due to an error.
-                    proc.kill()
+        """
-                process.kill()
+        logger.debug(f"Stopping {self}")
-            except Exception as e:
+
-                logger.debug(f"Error stopping the process: {e}")
+        # cleanup status
-        if self.status in [RenderStatus.RUNNING, RenderStatus.NOT_STARTED, RenderStatus.SCHEDULED]:
+        if self.status in [RenderStatus.RUNNING, RenderStatus.NOT_STARTED, RenderStatus.SCHEDULED,
+                           RenderStatus.CONFIGURING]:
             if is_error:
                 err_message = self.errors[-1] if self.errors else 'Unknown error'
                 logger.error(f"Halting render due to error: {err_message}")
@@ -275,28 +517,46 @@ class BaseRenderWorker(Base):
             else:
                 self.status = RenderStatus.CANCELLED
 
-    def percent_complete(self):
+        self.__kill_process()
-        return 0
+        if self.is_running():  # allow the log files to close
-
+            self.__thread.join(timeout=5)
-    def _parse_stdout(self, line):
-        raise NotImplementedError("_parse_stdout not implemented")
 
     def time_elapsed(self):
+        """Get elapsed time for this job.
+
+        Returns:
+            str: Formatted time elapsed string.
+        """
         return get_time_elapsed(self.start_time, self.end_time)
 
     def file_list(self):
+        """Get list of output files for this job.
+
+        Returns:
+            List[str]: List of output file paths.
+        """
         try:
             job_dir = os.path.dirname(self.output_path)
-            file_list = [os.path.join(job_dir, file) for file in os.listdir(job_dir)]
+            file_list = [
+                os.path.join(job_dir, file)
+                for file in os.listdir(job_dir)
+                if not file.startswith('.')  # Ignore hidden files
+            ]
             file_list.sort()
             return file_list
         except FileNotFoundError:
             return []
 
     def json(self):
+        """Convert worker to JSON-serializable dictionary.
+
+        Returns:
+            Dict[str, Any]: Dictionary representation of worker data.
+        """
         job_dict = {
             'id': self.id,
             'name': self.name,
+            'hostname': self.hostname,
             'input_path': self.input_path,
             'output_path': self.output_path,
             'priority': self.priority,
@@ -309,20 +569,23 @@ class BaseRenderWorker(Base):
             'file_hash': self.file_hash,
             'percent_complete': self.percent_complete(),
             'file_count': len(self.file_list()),
-            'renderer': self.renderer,
+            'engine': self.engine_name,
-            'renderer_version': self.renderer_version,
+            'engine_version': self.engine_version,
             'errors': getattr(self, 'errors', None),
             'start_frame': self.start_frame,
             'end_frame': self.end_frame,
             'total_frames': self.total_frames,
             'last_output': getattr(self, 'last_output', None),
-            'log_path': self.log_path()
+            'log_path': self.log_path(),
+            'args': self.args
         }
 
         # convert to json and back to auto-convert dates to iso format
         def date_serializer(o):
+            """Serialize datetime objects to ISO format."""
             if isinstance(o, datetime):
                 return o.isoformat()
+            return None
 
         json_convert = json.dumps(job_dict, default=date_serializer)
         worker_json = json.loads(json_convert)
@@ -330,6 +593,15 @@ class BaseRenderWorker(Base):
 
 
 def timecode_to_frames(timecode, frame_rate):
+    """Convert timecode string to frame number.
+
+    Args:
+        timecode: Timecode in format HH:MM:SS:FF.
+        frame_rate: Frames per second.
+
+    Returns:
+        int: Frame number corresponding to timecode.
+    """
     e = [int(x) for x in timecode.split(':')]
     seconds = (((e[0] * 60) + e[1] * 60) + e[2])
     frames = (seconds * frame_rate) + e[-1] + 1

src/engines/engine_manager.py

@@ -2,253 +2,417 @@ import logging
 import os
 import shutil
 import threading
+import concurrent.futures
+from pathlib import Path
+from typing import Type, List, Dict, Any, Optional
 
+from src.engines.core.base_engine import BaseRenderEngine
 from src.engines.blender.blender_engine import Blender
 from src.engines.ffmpeg.ffmpeg_engine import FFMPEG
-from src.utilities.misc_helper import system_safe_path, current_system_os, current_system_cpu
+from src.utilities.misc_helper import current_system_os, current_system_cpu
 
 logger = logging.getLogger()
 
+ENGINE_CLASSES = [Blender, FFMPEG]
 
 class EngineManager:
+    """Class that manages different versions of installed render engines and handles fetching and downloading new versions,
+    if possible.
+    """
 
-    engines_path = None
+    _default_instance: Optional['EngineManager'] = None
-    download_tasks = []
+
+    engines_path: Optional[str] = None
+    download_tasks: List[Any] = []
+
+    def __init__(self) -> None:
+        self.engines_path: Optional[str] = None
+        self.download_tasks: List[Any] = []
+
+    @classmethod
+    def _sync_class(cls) -> None:
+        if cls._default_instance is not None:
+            cls.engines_path = cls._default_instance.engines_path
+            cls.download_tasks = cls._default_instance.download_tasks
 
     @staticmethod
-    def supported_engines():
+    def supported_engines() -> list[type[BaseRenderEngine]]:
-        return [Blender, FFMPEG]
+        return ENGINE_CLASSES
 
-    @classmethod
+    # --- Installed Engines ---
-    def engine_with_name(cls, engine_name):
+
-        for obj in cls.supported_engines():
+    def _engine_class_for_project_path(self, path: str) -> Type[BaseRenderEngine]:
+        _, extension = os.path.splitext(path)
+        extension = extension.lower().strip('.')
+        for engine_class in self.supported_engines():
+            engine = self.get_latest_engine_instance(engine_class)
+            if extension in engine.supported_extensions():
+                return engine_class
+        undefined_renderer_support = [x for x in self.supported_engines() if not self.get_latest_engine_instance(x).supported_extensions()]
+        return undefined_renderer_support[0]
+
+    def _engine_class_with_name(self, engine_name: str) -> Optional[Type[BaseRenderEngine]]:
+        for obj in self.supported_engines():
             if obj.name().lower() == engine_name.lower():
                 return obj
+        return None
 
-    @classmethod
+    def _get_latest_engine_instance(self, engine_class: Type[BaseRenderEngine]) -> BaseRenderEngine:
-    def all_engines(cls):
+        newest = self.newest_installed_engine_data(engine_class.name())
+        engine = engine_class(newest["path"])
+        return engine
 
-        if not cls.engines_path:
+    def _get_installed_engine_data(self, filter_name: Optional[str] = None, include_corrupt: bool = False,
-            raise FileNotFoundError("Engines path must be set before requesting downloads")
+                                  ignore_system: bool = False) -> List[Dict[str, Any]]:
+        if not self.engines_path:
+            raise FileNotFoundError("Engine path is not set")
 
-        # Parse downloaded engine directory
         results = []
         try:
-            all_items = os.listdir(cls.engines_path)
+            all_items = os.listdir(self.engines_path)
-            all_directories = [item for item in all_items if os.path.isdir(os.path.join(cls.engines_path, item))]
+            all_directories = [item for item in all_items if os.path.isdir(os.path.join(self.engines_path, item))]
+            keys = ["engine", "version", "system_os", "cpu"]
 
             for directory in all_directories:
-                # Split the input string by dashes to get segments
                 segments = directory.split('-')
-
-                # Create a dictionary with named keys
-                keys = ["engine", "version", "system_os", "cpu"]
                 result_dict = {keys[i]: segments[i] for i in range(min(len(keys), len(segments)))}
                 result_dict['type'] = 'managed'
 
-                # Figure out the binary name for the path
                 binary_name = result_dict['engine'].lower()
-                for eng in cls.supported_engines():
+                eng = self.engine_class_with_name(result_dict['engine'])
-                    if eng.name().lower() == result_dict['engine']:
+                if eng:
-                        binary_name = eng.binary_names.get(result_dict['system_os'], binary_name)
+                    binary_name = eng.binary_names.get(result_dict['system_os'], binary_name)
-
-                # Find path to binary
-                path = None
-                for root, _, files in os.walk(system_safe_path(os.path.join(cls.engines_path, directory))):
-                    if binary_name in files:
-                        path = os.path.join(root, binary_name)
-                        break
 
+                search_root = Path(self.engines_path) / directory
+                match = next((p for p in search_root.rglob(binary_name) if p.is_file()), None)
+                path = str(match) if match else None
                 result_dict['path'] = path
-                results.append(result_dict)
+
+                if not filter_name or filter_name == result_dict['engine']:
+                    results.append(result_dict)
         except FileNotFoundError as e:
             logger.warning(f"Cannot find local engines download directory: {e}")
 
-        # add system installs to this list
+        def fetch_engine_details(eng, include_corrupt=False):
-        for eng in cls.supported_engines():
+            version = eng().version()
-            if eng.default_renderer_path():
+            if not version and not include_corrupt:
-                results.append({'engine': eng.name(), 'version': eng().version(),
+                return
-                                'system_os': current_system_os(),
+
-                                'cpu': current_system_cpu(),
+            return {
-                                'path': eng.default_renderer_path(), 'type': 'system'})
+                'engine': eng.name(),
+                'version': version or 'error',
+                'system_os': current_system_os(),
+                'cpu': current_system_cpu(),
+                'path': eng.default_engine_path(),
+                'type': 'system'
+            }
+
+        if not ignore_system:
+            with concurrent.futures.ThreadPoolExecutor() as executor:
+                futures = {
+                    executor.submit(fetch_engine_details, eng, include_corrupt): eng.name()
+                    for eng in self.supported_engines()
+                    if eng.default_engine_path() and (not filter_name or filter_name == eng.name())
+                }
+
+                for future in concurrent.futures.as_completed(futures):
+                    result = future.result()
+                    if result:
+                        results.append(result)
 
         return results
 
-    @classmethod
+    # --- Check for Updates ---
-    def all_versions_for_engine(cls, engine):
-        return [x for x in cls.all_engines() if x['engine'] == engine]
 
-    @classmethod
+    def _update_all_engines(self) -> None:
-    def newest_engine_version(cls, engine, system_os=None, cpu=None):
+        for engine in self.downloadable_engines():
+            update_available = self.is_engine_update_available(engine)
+            if update_available:
+                update_available['name'] = engine.name()
+                self.download_engine(engine.name(), update_available['version'], background=True)
+
+    def _all_version_data_for_engine(self, engine_name: str, include_corrupt=False, ignore_system=False) -> list:
+        versions = self.get_installed_engine_data(filter_name=engine_name, include_corrupt=include_corrupt, ignore_system=ignore_system)
+        sorted_versions = sorted(versions, key=lambda x: x['version'], reverse=True)
+        return sorted_versions
+
+    def _newest_installed_engine_data(self, engine_name: str, system_os=None, cpu=None, ignore_system=None) -> list:
         system_os = system_os or current_system_os()
         cpu = cpu or current_system_cpu()
 
         try:
-            filtered = [x for x in cls.all_engines() if x['engine'] == engine and x['system_os'] == system_os and x['cpu'] == cpu]
+            filtered = [x for x in self.all_version_data_for_engine(engine_name, ignore_system=ignore_system)
-            versions = sorted(filtered, key=lambda x: x['version'], reverse=True)
+                        if x['system_os'] == system_os and x['cpu'] == cpu]
-            return versions[0]
+            return filtered[0]
         except IndexError:
-            logger.error(f"Cannot find newest engine version for {engine}-{system_os}-{cpu}")
+            logger.error(f"Cannot find newest engine version for {engine_name}-{system_os}-{cpu}")
-            return None
+        return []
 
-    @classmethod
+    def _is_version_installed(self, engine_name: str, version: str, system_os=None, cpu=None, ignore_system=False):
-    def is_version_downloaded(cls, engine, version, system_os=None, cpu=None):
         system_os = system_os or current_system_os()
         cpu = cpu or current_system_cpu()
 
-        filtered = [x for x in cls.all_engines() if
+        filtered = [x for x in self.get_installed_engine_data(filter_name=engine_name, ignore_system=ignore_system) if
-                    x['engine'] == engine and x['system_os'] == system_os and x['cpu'] == cpu and x['version'] == version]
+                    x['system_os'] == system_os and x['cpu'] == cpu and x['version'] == version]
         return filtered[0] if filtered else False
 
-    @classmethod
+    def _version_is_available_to_download(self, engine_name: str, version, system_os=None, cpu=None):
-    def version_is_available_to_download(cls, engine, version, system_os=None, cpu=None):
         try:
-            downloader = cls.engine_with_name(engine).downloader()
+            downloader = self.engine_class_with_name(engine_name).downloader()
             return downloader.version_is_available_to_download(version=version, system_os=system_os, cpu=cpu)
         except Exception as e:
+            logger.debug(f"Exception in version_is_available_to_download: {e}")
             return None
 
-    @classmethod
+    def _find_most_recent_version(self, engine_name: str, system_os=None, cpu=None, lts_only=False) -> dict:
-    def find_most_recent_version(cls, engine=None, system_os=None, cpu=None, lts_only=False):
         try:
-            downloader = cls.engine_with_name(engine).downloader()
+            downloader = self.engine_class_with_name(engine_name).downloader()
             return downloader.find_most_recent_version(system_os=system_os, cpu=cpu)
         except Exception as e:
+            logger.debug(f"Exception in find_most_recent_version: {e}")
+            return {}
+
+    def _is_engine_update_available(self, engine_class: Type[BaseRenderEngine], ignore_system_installs=False):
+        logger.debug(f"Checking for updates to {engine_class.name()}")
+        latest_version = engine_class.downloader().find_most_recent_version()
+
+        if not latest_version:
+            logger.warning(f"Could not find most recent version of {engine_class.name()} to download")
             return None
 
-    @classmethod
+        version_num = latest_version.get('version')
-    def is_already_downloading(cls, engine, version, system_os=None, cpu=None):
+        if self.is_version_installed(engine_class.name(), version_num, ignore_system=ignore_system_installs):
-        for task in cls.download_tasks:
+            logger.debug(f"Latest version of {engine_class.name()} ({version_num}) already downloaded")
+            return None
+
+        return latest_version
+
+    # --- Downloads ---
+
+    def _downloadable_engines(self):
+        return [engine for engine in self.supported_engines() if hasattr(engine, "downloader") and engine.downloader()]
+
+    def _get_existing_download_task(self, engine_name, version, system_os=None, cpu=None):
+        for task in self.download_tasks:
             task_parts = task.name.split('-')
             task_engine, task_version, task_system_os, task_cpu = task_parts[:4]
 
-            if engine == task_engine and version == task_version:
+            if engine_name == task_engine and version == task_version:
                 if system_os in (task_system_os, None) and cpu in (task_cpu, None):
                     return task
-        return False
+        return None
 
-    @classmethod
+    def _download_engine(self, engine_name, version, system_os=None, cpu=None, background=False, ignore_system=False):
-    def download_engine(cls, engine, version, system_os=None, cpu=None, background=False):
+        engine_to_download = self.engine_class_with_name(engine_name)
-        def download_engine_task(engine, version, system_os=None, cpu=None):
+        existing_task = self.get_existing_download_task(engine_name, version, system_os, cpu)
-            existing_download = cls.is_version_downloaded(engine, version, system_os, cpu)
-            if existing_download:
-                logger.info(f"Requested download of {engine} {version}, but local copy already exists")
-                return existing_download
-
-            # Get the appropriate downloader class based on the engine type
-            cls.engine_with_name(engine).downloader().download_engine(version, download_location=cls.engines_path,
-                                                                      system_os=system_os, cpu=cpu, timeout=300)
-
-        engine_to_download = cls.engine_with_name(engine)
-        existing_task = cls.is_already_downloading(engine, version, system_os, cpu)
         if existing_task:
-            logger.debug(f"Already downloading {engine} {version}")
+            logger.debug(f"Already downloading {engine_name} {version}")
             if not background:
-                existing_task.join()  # If download task exists, wait until its done downloading
+                existing_task.join()
-            return
+            return None
         elif not engine_to_download.downloader():
             logger.warning("No valid downloader for this engine. Please update this software manually.")
-            return
+            return None
-        elif not cls.engines_path:
+        elif not self.engines_path:
             raise FileNotFoundError("Engines path must be set before requesting downloads")
 
-        thread = threading.Thread(target=download_engine_task, args=(engine, version, system_os, cpu),
+        thread = EngineDownloadWorker(engine_name, version, system_os, cpu)
-                                  name=f'{engine}-{version}-{system_os}-{cpu}')
+        self.download_tasks.append(thread)
-        cls.download_tasks.append(thread)
         thread.start()
 
         if background:
             return thread
-        else:
-            thread.join()
-            found_engine = cls.is_version_downloaded(engine, version, system_os, cpu)  # Check that engine downloaded
-            if not found_engine:
-                logger.error(f"Error downloading {engine}")
-            return found_engine
 
+        thread.join()
+        found_engine = self.is_version_installed(engine_name, version, system_os, cpu, ignore_system)
+        if not found_engine:
+            logger.error(f"Error downloading {engine_name}")
+        return found_engine
 
-    @classmethod
+    def _delete_engine_download(self, engine_name, version, system_os=None, cpu=None):
-    def delete_engine_download(cls, engine, version, system_os=None, cpu=None):
+        logger.info(f"Requested deletion of engine: {engine_name}-{version}")
-        logger.info(f"Requested deletion of engine: {engine}-{version}")
 
-        found = cls.is_version_downloaded(engine, version, system_os, cpu)
+        found = self.is_version_installed(engine_name, version, system_os, cpu)
-        if found and found['type'] == 'managed':  # don't delete system installs
+        if found and found['type'] == 'managed':
-            # find the root directory of the engine executable
+            root_dir_name = '-'.join([engine_name, version, found['system_os'], found['cpu']])
-            root_dir_name = '-'.join([engine, version, found['system_os'], found['cpu']])
             remove_path = os.path.join(found['path'].split(root_dir_name)[0], root_dir_name)
-            # delete the file path
             logger.info(f"Deleting engine at path: {remove_path}")
             shutil.rmtree(remove_path, ignore_errors=False)
-            logger.info(f"Engine {engine}-{version}-{found['system_os']}-{found['cpu']} successfully deleted")
+            logger.info(f"Engine {engine_name}-{version}-{found['system_os']}-{found['cpu']} successfully deleted")
             return True
-        elif found:  # these are managed by the system / user. Don't delete these.
+        elif found:
-            logger.error(f'Cannot delete requested {engine} {version}. Managed externally.')
+            logger.error(f'Cannot delete requested {engine_name} {version}. Managed externally.')
         else:
-            logger.error(f"Cannot find engine: {engine}-{version}")
+            logger.error(f"Cannot find engine: {engine_name}-{version}")
         return False
 
-    @classmethod
+    # --- Background Tasks ---
-    def update_all_engines(cls):
-        def engine_update_task(engine):
-            logger.debug(f"Checking for updates to {engine.name()}")
-            latest_version = engine.downloader().find_most_recent_version()
-            if latest_version:
-                logger.debug(f"Latest version of {engine.name()} available: {latest_version.get('version')}")
-                if not cls.is_version_downloaded(engine.name(), latest_version.get('version')):
-                    logger.info(f"Downloading latest version of {engine.name()}...")
-                    cls.download_engine(engine=engine.name(), version=latest_version['version'], background=True)
-            else:
-                logger.warning(f"Unable to get check for updates for {engine.name()}")
 
-        logger.info(f"Checking for updates for render engines...")
+    def _active_downloads(self) -> list:
-        threads = []
+        return [x for x in self.download_tasks if x.is_alive()]
-        for engine in cls.supported_engines():
-            if engine.downloader():
-                thread = threading.Thread(target=engine_update_task, args=(engine,))
-                threads.append(thread)
-                thread.start()
 
+    def _create_worker(self, engine_name: str, input_path: Path, output_path: Path, engine_version=None, args=None, parent=None, name=None):
+        worker_class = self.engine_class_with_name(engine_name).worker_class()
 
-    @classmethod
+        all_versions = self.all_version_data_for_engine(engine_name)
-    def create_worker(cls, renderer, input_path, output_path, engine_version=None, args=None, parent=None, name=None):
-
-        worker_class = cls.engine_with_name(renderer).worker_class()
-
-        # check to make sure we have versions installed
-        all_versions = EngineManager.all_versions_for_engine(renderer)
         if not all_versions:
-            raise FileNotFoundError(f"Cannot find any installed {renderer} engines")
+            raise FileNotFoundError(f"Cannot find any installed '{engine_name}' engines")
 
-        # Find the path to the requested engine version or use default
+        engine_path = None
-        engine_path = None if engine_version else all_versions[0]['path']
+        if engine_version and engine_version != 'latest':
-        if engine_version:
             for ver in all_versions:
                 if ver['version'] == engine_version:
                     engine_path = ver['path']
                     break
 
-            # Download the required engine if not found locally
             if not engine_path:
-                download_result = EngineManager.download_engine(renderer, engine_version)
+                download_result = self.download_engine(engine_name, engine_version)
                 if not download_result:
-                    raise FileNotFoundError(f"Cannot download requested version: {renderer} {engine_version}")
+                    raise FileNotFoundError(f"Cannot download requested version: {engine_name} {engine_version}")
                 engine_path = download_result['path']
                 logger.info("Engine downloaded. Creating worker.")
+        else:
+            logger.debug(f"Using latest engine version ({all_versions[0]['version']})")
+            engine_path = all_versions[0]['path']
 
         if not engine_path:
             raise FileNotFoundError(f"Cannot find requested engine version {engine_version}")
 
-        return worker_class(input_path=input_path, output_path=output_path, engine_path=engine_path, args=args,
+        return worker_class(input_path=str(input_path), output_path=str(output_path), engine_path=engine_path, args=args,
                             parent=parent, name=name)
 
+    # --- Forwarders for backward compatibility ---
+
     @classmethod
-    def engine_for_project_path(cls, path):
+    def engine_class_for_project_path(cls, path):
-        name, extension = os.path.splitext(path)
+        if cls._default_instance is not None:
-        for engine in cls.supported_engines():
+            return cls._default_instance._engine_class_for_project_path(path)
-            if extension in engine.supported_extensions:
+
-                return engine
+    @classmethod
-        undefined_renderer_support = [x for x in cls.supported_engines() if not x.supported_extensions]
+    def engine_class_with_name(cls, engine_name):
-        return undefined_renderer_support[0]
+        if cls._default_instance is not None:
+            return cls._default_instance._engine_class_with_name(engine_name)
+
+    @classmethod
+    def get_latest_engine_instance(cls, engine_class):
+        if cls._default_instance is not None:
+            return cls._default_instance._get_latest_engine_instance(engine_class)
+
+    @classmethod
+    def get_installed_engine_data(cls, filter_name=None, include_corrupt=False, ignore_system=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._get_installed_engine_data(filter_name, include_corrupt, ignore_system)
+        return []
+
+    @classmethod
+    def update_all_engines(cls):
+        if cls._default_instance is not None:
+            cls._default_instance._update_all_engines()
+
+    @classmethod
+    def all_version_data_for_engine(cls, engine_name, include_corrupt=False, ignore_system=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._all_version_data_for_engine(engine_name, include_corrupt, ignore_system)
+        return []
+
+    @classmethod
+    def newest_installed_engine_data(cls, engine_name, system_os=None, cpu=None, ignore_system=None):
+        if cls._default_instance is not None:
+            return cls._default_instance._newest_installed_engine_data(engine_name, system_os, cpu, ignore_system)
+        return []
+
+    @classmethod
+    def is_version_installed(cls, engine_name, version, system_os=None, cpu=None, ignore_system=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._is_version_installed(engine_name, version, system_os, cpu, ignore_system)
+        return False
+
+    @classmethod
+    def version_is_available_to_download(cls, engine_name, version, system_os=None, cpu=None):
+        if cls._default_instance is not None:
+            return cls._default_instance._version_is_available_to_download(engine_name, version, system_os, cpu)
+        return None
+
+    @classmethod
+    def find_most_recent_version(cls, engine_name, system_os=None, cpu=None, lts_only=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._find_most_recent_version(engine_name, system_os, cpu, lts_only)
+        return {}
+
+    @classmethod
+    def is_engine_update_available(cls, engine_class, ignore_system_installs=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._is_engine_update_available(engine_class, ignore_system_installs)
+        return None
+
+    @classmethod
+    def downloadable_engines(cls):
+        if cls._default_instance is not None:
+            return cls._default_instance._downloadable_engines()
+        return []
+
+    @classmethod
+    def get_existing_download_task(cls, engine_name, version, system_os=None, cpu=None):
+        if cls._default_instance is not None:
+            return cls._default_instance._get_existing_download_task(engine_name, version, system_os, cpu)
+        return None
+
+    @classmethod
+    def download_engine(cls, engine_name, version, system_os=None, cpu=None, background=False, ignore_system=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._download_engine(engine_name, version, system_os, cpu, background, ignore_system)
+        return None
+
+    @classmethod
+    def delete_engine_download(cls, engine_name, version, system_os=None, cpu=None):
+        if cls._default_instance is not None:
+            return cls._default_instance._delete_engine_download(engine_name, version, system_os, cpu)
+        return False
+
+    @classmethod
+    def active_downloads(cls):
+        if cls._default_instance is not None:
+            return cls._default_instance._active_downloads()
+        return []
+
+    @classmethod
+    def create_worker(cls, engine_name, input_path, output_path, engine_version=None, args=None, parent=None, name=None):
+        if cls._default_instance is not None:
+            return cls._default_instance._create_worker(engine_name, input_path, output_path, engine_version, args, parent, name)
+        raise RuntimeError("EngineManager is not initialized")
+
+
+class EngineDownloadWorker(threading.Thread):
+    def __init__(self, engine, version, system_os=None, cpu=None):
+        super().__init__()
+        self.engine = engine
+        self.version = version
+        self.system_os = system_os
+        self.cpu = cpu
+        self.percent_complete = 0
+
+    def _update_progress(self, current_progress):
+        self.percent_complete = current_progress
+
+    def run(self):
+        try:
+            existing_download = EngineManager.is_version_installed(self.engine, self.version, self.system_os, self.cpu,
+                                                                    ignore_system=True)
+            if existing_download:
+                logger.info(f"Requested download of {self.engine} {self.version}, but local copy already exists")
+                return existing_download
+
+            downloader = EngineManager.engine_class_with_name(self.engine).downloader()
+            downloader.download_engine(self.version, download_location=EngineManager.engines_path,
+                                        system_os=self.system_os, cpu=self.cpu, timeout=300, progress_callback=self._update_progress)
+        except Exception as e:
+            logger.error(f"Error in download worker: {e}")
+        finally:
+            try:
+                if EngineManager._default_instance is not None:
+                    EngineManager._default_instance.download_tasks.remove(self)
+            except ValueError:
+                pass
 
 
 if __name__ == '__main__':
@@ -258,4 +422,4 @@ if __name__ == '__main__':
     # EngineManager.delete_engine_download('blender', '3.2.1', 'macos', 'a')
     EngineManager.engines_path = "/Users/brettwilliams/zordon-uploads/engines"
     # print(EngineManager.is_version_downloaded("ffmpeg", "6.0"))
-    print(EngineManager.all_engines())
+    print(EngineManager.get_installed_engine_data())

src/engines/ffmpeg/ffmpeg_downloader.py

@@ -90,14 +90,14 @@ class FFMPEGDownloader(EngineDownloader):
         return releases
 
     @classmethod
-    def __all_versions(cls, system_os=None, cpu=None):
+    def all_versions(cls, system_os=None, cpu=None):
         system_os = system_os or current_system_os()
         cpu = cpu or current_system_cpu()
         versions_per_os = {'linux': cls.__get_linux_versions, 'macos': cls.__get_macos_versions,
                            'windows': cls.__get_windows_versions}
         if not versions_per_os.get(system_os):
             logger.error(f"Cannot find version list for {system_os}")
-            return
+            return None
 
         results = []
         all_versions = versions_per_os[system_os]()
@@ -131,28 +131,28 @@ class FFMPEGDownloader(EngineDownloader):
         try:
             system_os = system_os or current_system_os()
             cpu = cpu or current_system_cpu()
-            return cls.__all_versions(system_os, cpu)[0]
+            return cls.all_versions(system_os, cpu)[0]
-        except (IndexError, requests.exceptions.RequestException):
+        except (IndexError, requests.exceptions.RequestException) as e:
-            logger.error(f"Cannot get most recent version of ffmpeg")
+            logger.error(f"Cannot get most recent version of ffmpeg: {e}")
         return {}
 
     @classmethod
     def version_is_available_to_download(cls, version, system_os=None, cpu=None):
-        for ver in cls.__all_versions(system_os, cpu):
+        for ver in cls.all_versions(system_os, cpu):
             if ver['version'] == version:
                 return ver
         return None
 
     @classmethod
-    def download_engine(cls, version, download_location, system_os=None, cpu=None, timeout=120):
+    def download_engine(cls, version, download_location, system_os=None, cpu=None, timeout=120, progress_callback=None):
         system_os = system_os or current_system_os()
         cpu = cpu or current_system_cpu()
 
         # Verify requested version is available
-        found_version = [item for item in cls.__all_versions(system_os, cpu) if item['version'] == version]
+        found_version = [item for item in cls.all_versions(system_os, cpu) if item['version'] == version]
         if not found_version:
             logger.error(f"Cannot find FFMPEG version {version} for {system_os} and {cpu}")
-            return
+            return None
 
         # Platform specific naming cleanup
         remote_url = cls.__get_remote_url_for_version(version=version, system_os=system_os, cpu=cpu)
@@ -162,7 +162,8 @@ class FFMPEGDownloader(EngineDownloader):
         # Download and extract
         try:
             logger.info(f"Requesting download of ffmpeg-{version}-{system_os}-{cpu}")
-            cls.download_and_extract_app(remote_url=remote_url, download_location=download_location, timeout=timeout)
+            cls.download_and_extract_app(remote_url=remote_url, download_location=download_location, timeout=timeout,
+                                         progress_callback=progress_callback)
 
             # naming cleanup to match existing naming convention
             output_path = os.path.join(download_location, f'ffmpeg-{version}-{system_os}-{cpu}')
@@ -182,4 +183,5 @@ if __name__ == "__main__":
     logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
     # print(FFMPEGDownloader.download_engine('6.0', '/Users/brett/zordon-uploads/engines/'))
     # print(FFMPEGDownloader.find_most_recent_version(system_os='linux'))
-    print(FFMPEGDownloader.download_engine(version='6.0', download_location='/Users/brett/zordon-uploads/engines/', system_os='linux', cpu='x64'))
+    print(FFMPEGDownloader.download_engine(version='6.0', download_location='/Users/brett/zordon-uploads/engines/',
+                                           system_os='linux', cpu='x64'))

src/engines/ffmpeg/ffmpeg_engine.py

@@ -1,11 +1,13 @@
 import json
+import os
 import re
 
 from src.engines.core.base_engine import *
 
+_creationflags = subprocess.CREATE_NO_WINDOW if platform.system() == 'Windows' else 0
+
 
 class FFMPEG(BaseRenderEngine):
-
     binary_names = {'linux': 'ffmpeg', 'windows': 'ffmpeg.exe', 'macos': 'ffmpeg'}
 
     @staticmethod
@@ -18,12 +20,24 @@ class FFMPEG(BaseRenderEngine):
         from src.engines.ffmpeg.ffmpeg_worker import FFMPEGRenderWorker
         return FFMPEGRenderWorker
 
+    def ui_options(self):
+        return []
+
+    def supported_extensions(self):
+        help_text = (subprocess.check_output([self.engine_path(), '-h', 'full'], stderr=subprocess.STDOUT,
+                                             creationflags=_creationflags).decode('utf-8'))
+        found = re.findall(r'extensions that .* is allowed to access \(default "(.*)"', help_text)
+        found_extensions = set()
+        for match in found:
+            found_extensions.update(match.split(','))
+        return list(found_extensions)
+
     def version(self):
         version = None
         try:
-            ver_out = subprocess.check_output([self.renderer_path(), '-version'],
+            ver_out = subprocess.check_output([self.engine_path(), '-version'], timeout=SUBPROCESS_TIMEOUT,
-                                              timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
+                                              creationflags=_creationflags).decode('utf-8')
-            match = re.match(".*version\s*(\S+)\s*Copyright", ver_out)
+            match = re.match(r".*version\s*([\w.*]+)\W*", ver_out)
             if match:
                 version = match.groups()[0]
         except Exception as e:
@@ -31,18 +45,24 @@ class FFMPEG(BaseRenderEngine):
         return version
 
     def get_project_info(self, project_path, timeout=10):
-        return self.get_video_info_ffprobe(project_path)
+        """Run ffprobe and parse the output as JSON"""
-
-    @staticmethod
-    def get_video_info_ffprobe(video_path):
         try:
-            # Run ffprobe and parse the output as JSON
+            # resolve ffprobe path
+            engine_dir = os.path.dirname(self.engine_path())
+            ffprobe_path = os.path.join(engine_dir, 'ffprobe')
+            if self.engine_path().endswith('.exe'):
+                ffprobe_path += '.exe'
+            if not os.path.exists(ffprobe_path):  # fallback to system install (if available)
+                ffprobe_path = 'ffprobe'
+
+            # run ffprobe
             cmd = [
-                'ffprobe', '-v', 'quiet', '-print_format', 'json',
+                ffprobe_path, '-v', 'quiet', '-print_format', 'json',
-                '-show_streams', '-select_streams', 'v', video_path
+                '-show_streams', '-select_streams', 'v', project_path
             ]
-            result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+            output = subprocess.check_output(cmd, stderr=subprocess.STDOUT, text=True,
-            video_info = json.loads(result.stdout)
+                                             creationflags=_creationflags)
+            video_info = json.loads(output)
 
             # Extract the necessary information
             video_stream = video_info['streams'][0]
@@ -67,13 +87,13 @@ class FFMPEG(BaseRenderEngine):
             }
 
         except Exception as e:
-            print(f"An error occurred: {e}")
+            print(f"Failed to get FFMPEG project info: {e}")
             return None
 
     def get_encoders(self):
-        raw_stdout = subprocess.check_output([self.renderer_path(), '-encoders'], stderr=subprocess.DEVNULL,
+        raw_stdout = subprocess.check_output([self.engine_path(), '-encoders'], stderr=subprocess.DEVNULL,
-                                             timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
+                                             timeout=SUBPROCESS_TIMEOUT, creationflags=_creationflags).decode('utf-8')
-        pattern = '(?P<type>[VASFXBD.]{6})\s+(?P<name>\S{2,})\s+(?P<description>.*)'
+        pattern = r'(?P<type>[VASFXBD.]{6})\s+(?P<name>\S{2,})\s+(?P<description>.*)'
         encoders = [m.groupdict() for m in re.finditer(pattern, raw_stdout)]
         return encoders
 
@@ -83,9 +103,10 @@ class FFMPEG(BaseRenderEngine):
 
     def get_all_formats(self):
         try:
-            formats_raw = subprocess.check_output([self.renderer_path(), '-formats'], stderr=subprocess.DEVNULL,
+            formats_raw = subprocess.check_output([self.engine_path(), '-formats'], stderr=subprocess.DEVNULL,
-                                                 timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
+                                                  timeout=SUBPROCESS_TIMEOUT,
-            pattern = '(?P<type>[DE]{1,2})\s+(?P<id>\S{2,})\s+(?P<name>.*)\r'
+                                                  creationflags=_creationflags).decode('utf-8')
+            pattern = r'(?P<type>[DE]{1,2})\s+(?P<id>\S{2,})\s+(?P<name>.*)'
             all_formats = [m.groupdict() for m in re.finditer(pattern, formats_raw)]
             return all_formats
         except Exception as e:
@@ -96,7 +117,8 @@ class FFMPEG(BaseRenderEngine):
         # Extract the common extension using regex
         muxer_flag = 'muxer' if 'E' in ffmpeg_format['type'] else 'demuxer'
         format_detail_raw = subprocess.check_output(
-            [self.renderer_path(), '-hide_banner', '-h', f"{muxer_flag}={ffmpeg_format['id']}"]).decode('utf-8')
+            [self.engine_path(), '-hide_banner', '-h', f"{muxer_flag}={ffmpeg_format['id']}"],
+            creationflags=_creationflags).decode('utf-8')
         pattern = r"Common extensions: (\w+)"
         common_extensions = re.findall(pattern, format_detail_raw)
         found_extensions = []
@@ -105,19 +127,21 @@ class FFMPEG(BaseRenderEngine):
         return found_extensions
 
     def get_output_formats(self):
-        return [x for x in self.get_all_formats() if 'E' in x['type'].upper()]
+        return [x['id'] for x in self.get_all_formats() if 'E' in x['type'].upper()]
 
     def get_frame_count(self, path_to_file):
-        raw_stdout = subprocess.check_output([self.renderer_path(), '-i', path_to_file, '-map', '0:v:0', '-c', 'copy',
+        raw_stdout = subprocess.check_output([self.engine_path(), '-i', path_to_file, '-map', '0:v:0', '-c', 'copy',
-                                               '-f', 'null', '-'], stderr=subprocess.STDOUT,
+                                              '-f', 'null', '-'], stderr=subprocess.STDOUT,
-                                              timeout=SUBPROCESS_TIMEOUT).decode('utf-8')
+                                             timeout=SUBPROCESS_TIMEOUT, creationflags=_creationflags).decode('utf-8')
         match = re.findall(r'frame=\s*(\d+)', raw_stdout)
         if match:
             frame_number = int(match[-1])
             return frame_number
+        return -1
 
     def get_arguments(self):
-        help_text = subprocess.check_output([self.renderer_path(), '-h', 'long'], stderr=subprocess.STDOUT).decode('utf-8')
+        help_text = (subprocess.check_output([self.engine_path(), '-h', 'long'], stderr=subprocess.STDOUT,
+                                             creationflags=_creationflags).decode('utf-8'))
         lines = help_text.splitlines()
 
         options = {}
@@ -144,4 +168,4 @@ class FFMPEG(BaseRenderEngine):
 
 
 if __name__ == "__main__":
-    print(FFMPEG().get_all_formats())
+    print(FFMPEG().get_all_formats())

src/engines/ffmpeg/ffmpeg_worker.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python3
 import re
-import subprocess
 
 from src.engines.core.base_worker import BaseRenderWorker
 from src.engines.ffmpeg.ffmpeg_engine import FFMPEG
@@ -10,24 +9,18 @@ class FFMPEGRenderWorker(BaseRenderWorker):
 
     engine = FFMPEG
 
-    def __init__(self, input_path, output_path, args=None, parent=None, name=None):
+    def __init__(self, input_path, output_path, engine_path, args=None, parent=None, name=None):
-        super(FFMPEGRenderWorker, self).__init__(input_path=input_path, output_path=output_path, args=args,
+        super(FFMPEGRenderWorker, self).__init__(input_path=input_path, output_path=output_path,
-                                                 parent=parent, name=name)
+                                                 engine_path=engine_path, args=args, parent=parent, name=name)
-
-        stream_info = subprocess.check_output([self.renderer_path, "-i",  # https://stackoverflow.com/a/61604105
-                                               input_path, "-map", "0:v:0", "-c", "copy", "-f", "null", "-y",
-                                                     "/dev/null"], stderr=subprocess.STDOUT).decode('utf-8')
-        found_frames = re.findall('frame=\s*(\d+)', stream_info)
-        self.project_length = found_frames[-1] if found_frames else '-1'
         self.current_frame = -1
 
     def generate_worker_subprocess(self):
 
-        cmd = [self.engine.default_renderer_path(), '-y', '-stats', '-i', self.input_path]
+        cmd = [self.engine_path, '-y', '-stats', '-i', self.input_path]
 
         # Resize frame
-        if self.args.get('x_resolution', None) and self.args.get('y_resolution', None):
+        if self.args.get('resolution', None):
-            cmd.extend(['-vf', f"scale={self.args['x_resolution']}:{self.args['y_resolution']}"])
+            cmd.extend(['-vf', f"scale={self.args['resolution'][0]}:{self.args['resolution'][1]}"])
 
         # Convert raw args from string if available
         raw_args = self.args.get('raw', None)
@@ -35,7 +28,7 @@ class FFMPEGRenderWorker(BaseRenderWorker):
             cmd.extend(raw_args.split(' '))
 
         # Close with output path
-        cmd.append(self.output_path)
+        cmd.extend(['-max_muxing_queue_size', '1024', self.output_path])
         return cmd
 
     def percent_complete(self):

src/init.py

@@ -1,70 +0,0 @@
-''' app/init.py '''
-import logging
-import os
-import sys
-import threading
-from collections import deque
-
-from PyQt6.QtCore import QObject, pyqtSignal
-from PyQt6.QtWidgets import QApplication
-
-from .render_queue import RenderQueue
-from .ui.main_window import MainWindow
-
-from src.api.api_server import start_server
-from src.utilities.config import Config
-from src.utilities.misc_helper import system_safe_path
-
-
-def run() -> int:
-    """
-    Initializes the application and runs it.
-
-    Returns:
-        int: The exit status code.
-    """
-
-    # Load Config YAML
-    config_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'config')
-    Config.load_config(system_safe_path(os.path.join(config_dir, 'config.yaml')))
-
-    logging.basicConfig(format='%(asctime)s: %(levelname)s: %(module)s: %(message)s', datefmt='%d-%b-%y %H:%M:%S',
-                        level=Config.server_log_level.upper())
-
-    app: QApplication = QApplication(sys.argv)
-
-    # Start server in background
-    background_server = threading.Thread(target=start_server)
-    background_server.daemon = True
-    background_server.start()
-
-    # Setup logging for console ui
-    buffer_handler = BufferingHandler()
-    buffer_handler.setFormatter(logging.getLogger().handlers[0].formatter)
-    logger = logging.getLogger()
-    logger.addHandler(buffer_handler)
-
-    window: MainWindow = MainWindow()
-    window.buffer_handler = buffer_handler
-    window.show()
-
-    return_code = app.exec()
-    RenderQueue.prepare_for_shutdown()
-    return sys.exit(return_code)
-
-
-class BufferingHandler(logging.Handler, QObject):
-    new_record = pyqtSignal(str)
-
-    def __init__(self, capacity=100):
-        logging.Handler.__init__(self)
-        QObject.__init__(self)
-        self.buffer = deque(maxlen=capacity)  # Define a buffer with a fixed capacity
-
-    def emit(self, record):
-        msg = self.format(record)
-        self.buffer.append(msg)  # Add message to the buffer
-        self.new_record.emit(msg)  # Emit signal
-
-    def get_buffer(self):
-        return list(self.buffer)  # Return a copy of the buffer

src/render_queue.py

@@ -1,157 +1,299 @@
 import logging
-import os
+import threading
+from collections import Counter
 from datetime import datetime
+from pathlib import Path
+from typing import Any, Dict, List, Optional
 
+from pubsub import pub
 from sqlalchemy import create_engine
-from sqlalchemy.orm import sessionmaker
+from sqlalchemy.orm import Session, sessionmaker
+from sqlalchemy.orm.exc import DetachedInstanceError
 
+from src.engines.core.base_worker import Base, BaseRenderWorker
 from src.utilities.status_utils import RenderStatus
-from src.engines.engine_manager import EngineManager
-from src.engines.core.base_worker import Base
 
 logger = logging.getLogger()
 
 
 class JobNotFoundError(Exception):
-    def __init__(self, job_id, *args):
+    def __init__(self, job_id: str, *args: Any) -> None:
         super().__init__(args)
         self.job_id = job_id
 
+    def __str__(self) -> str:
+        return f"Cannot find job with ID: {self.job_id}"
+
 
 class RenderQueue:
-    engine = None
+    _default_instance: Optional['RenderQueue'] = None
-    session = None
-    job_queue = []
-    maximum_renderer_instances = {'blender': 1, 'aerender': 1, 'ffmpeg': 4}
-    last_saved_counts = {}
-
-    def __init__(self):
-        pass
 
     @classmethod
-    def add_to_render_queue(cls, render_job, force_start=False):
+    def _sync_class(cls) -> None:
-        logger.debug('Adding priority {} job to render queue: {}'.format(render_job.priority, render_job))
+        if cls._default_instance is not None:
-        cls.job_queue.append(render_job)
+            pass  # no class-level attributes to sync
-        if force_start:
-            cls.start_job(render_job)
-        cls.session.add(render_job)
-        cls.save_state()
 
-    @classmethod
+    def __init__(self) -> None:
-    def all_jobs(cls):
+        self.engine: Optional[create_engine] = None
-        return cls.job_queue
+        self.session: Optional[Session] = None
+        self.job_queue: List[BaseRenderWorker] = []
+        self.maximum_renderer_instances: Dict[str, int] = {'blender': 1, 'aerender': 1, 'ffmpeg': 4}
+        self.last_saved_counts: Dict[str, int] = {}
+        self.is_running: bool = False
+        self._lock = threading.Lock()
 
-    @classmethod
+    # --------------------------------------------
-    def running_jobs(cls):
+    # Render Queue Evaluation:
-        return cls.jobs_with_status(RenderStatus.RUNNING)
+    # --------------------------------------------
 
-    @classmethod
+    def _start(self) -> None:
-    def pending_jobs(cls):
+        logger.debug("Starting render queue updates")
-        pending_jobs = cls.jobs_with_status(RenderStatus.NOT_STARTED)
+        self.is_running = True
-        pending_jobs.extend(cls.jobs_with_status(RenderStatus.SCHEDULED))
+        self.evaluate_queue()
-        return pending_jobs
 
-    @classmethod
+    def _evaluate_queue(self) -> None:
-    def jobs_with_status(cls, status, priority_sorted=False):
+        try:
-        found_jobs = [x for x in cls.all_jobs() if x.status == status]
+            not_started = self.jobs_with_status(RenderStatus.NOT_STARTED, priority_sorted=True)
+            for job in not_started:
+                if self.is_available_for_job(job.engine_name, job.priority):
+                    self.start_job(job)
+
+            scheduled = self.jobs_with_status(RenderStatus.SCHEDULED, priority_sorted=True)
+            for job in scheduled:
+                if job.scheduled_start <= datetime.now():
+                    logger.debug(f"Starting scheduled job: {job}")
+                    self.start_job(job)
+
+            if self.last_saved_counts != self.job_counts():
+                self.save_state()
+        except DetachedInstanceError:
+            pass
+
+    def _local_job_status_changed(self, job_id: str, old_status: str, new_status: str) -> None:
+        render_job = self.job_with_id(job_id, none_ok=True)
+        if render_job and self.is_running:
+            logger.debug(f"RenderQueue detected job {job_id} has changed from {old_status} -> {new_status}")
+            self.evaluate_queue()
+
+    def _stop(self) -> None:
+        logger.debug("Stopping render queue updates")
+        self.is_running = False
+
+    # --------------------------------------------
+    # Fetch Jobs:
+    # --------------------------------------------
+
+    def _all_jobs(self) -> List[BaseRenderWorker]:
+        return self.job_queue
+
+    def _running_jobs(self) -> List[BaseRenderWorker]:
+        return self.jobs_with_status(RenderStatus.RUNNING)
+
+    def _pending_jobs(self) -> List[BaseRenderWorker]:
+        pending = self.jobs_with_status(RenderStatus.NOT_STARTED)
+        pending.extend(self.jobs_with_status(RenderStatus.SCHEDULED))
+        return pending
+
+    def _jobs_with_status(self, status: RenderStatus, priority_sorted: bool = False) -> List[BaseRenderWorker]:
+        found_jobs = [x for x in self.all_jobs() if x.status == status]
         if priority_sorted:
             found_jobs = sorted(found_jobs, key=lambda a: a.priority, reverse=False)
         return found_jobs
 
-    @classmethod
+    def _job_with_id(self, job_id: str, none_ok: bool = False) -> Optional[BaseRenderWorker]:
-    def job_with_id(cls, job_id, none_ok=False):
+        found_job = next((x for x in self.all_jobs() if x.id == job_id), None)
-        found_job = next((x for x in cls.all_jobs() if x.id == job_id), None)
         if not found_job and not none_ok:
             raise JobNotFoundError(job_id)
         return found_job
 
-    @classmethod
+    def _job_counts(self) -> Dict[str, int]:
-    def clear_history(cls):
+        counts = Counter(x.status for x in self.all_jobs())
-        to_remove = [x for x in cls.all_jobs() if x.status in [RenderStatus.CANCELLED,
+        return {s.value: counts.get(s, 0) for s in RenderStatus}
-                                                               RenderStatus.COMPLETED, RenderStatus.ERROR]]
-        for job_to_remove in to_remove:
-            cls.delete_job(job_to_remove)
-        cls.save_state()
 
-    @classmethod
+    # --------------------------------------------
-    def load_state(cls, database_directory):
+    # Startup / Shutdown:
-        if not cls.engine:
+    # --------------------------------------------
-            cls.engine = create_engine(f"sqlite:///{os.path.join(database_directory, 'database.db')}")
+
-            Base.metadata.create_all(cls.engine)
+    def _load_state(self, database_directory: Path) -> None:
-            cls.session = sessionmaker(bind=cls.engine)()
+        self.engine = create_engine(f"sqlite:///{database_directory / 'database.db'}")
+        Base.metadata.create_all(self.engine)
+        self.session = sessionmaker(bind=self.engine)()
         from src.engines.core.base_worker import BaseRenderWorker
-        cls.job_queue = cls.session.query(BaseRenderWorker).all()
+        self.job_queue = self.session.query(BaseRenderWorker).all()
+        pub.subscribe(self._local_job_status_changed, 'status_change')
 
-    @classmethod
+    def _save_state(self) -> None:
-    def save_state(cls):
+        if self.session:
-        cls.session.commit()
+            self.session.commit()
 
-    @classmethod
+    def _prepare_for_shutdown(self) -> None:
-    def prepare_for_shutdown(cls):
         logger.debug("Closing session")
-        running_jobs = cls.jobs_with_status(RenderStatus.RUNNING)  # cancel all running jobs
+        self.stop()
-        [cls.cancel_job(job) for job in running_jobs]
+        running_jobs = self.jobs_with_status(RenderStatus.RUNNING)
-        cls.save_state()
+        for job in running_jobs:
-        cls.session.close()
+            self.cancel_job(job)
+        self.save_state()
+        if self.session:
+            self.session.close()
 
-    @classmethod
+    # --------------------------------------------
-    def is_available_for_job(cls, renderer, priority=2):
+    # Renderer Availability:
+    # --------------------------------------------
 
-        if not EngineManager.all_versions_for_engine(renderer):
+    def renderer_instances(self) -> Counter:
-            return False
+        all_instances = [x.engine_name for x in self.running_jobs()]
+        return Counter(all_instances)
 
-        instances = cls.renderer_instances()
+    def _is_available_for_job(self, renderer: str, priority: int = 2) -> bool:
-        higher_priority_jobs = [x for x in cls.running_jobs() if x.priority < priority]
+        instances = self.renderer_instances()
-        max_allowed_instances = cls.maximum_renderer_instances.get(renderer, 1)
+        higher_priority_jobs = [x for x in self.running_jobs() if x.priority < priority]
-        maxed_out_instances = renderer in instances.keys() and instances[renderer] >= max_allowed_instances
+        max_allowed_instances = self.maximum_renderer_instances.get(renderer, 1)
+        maxed_out_instances = renderer in instances and instances[renderer] >= max_allowed_instances
         return not maxed_out_instances and not higher_priority_jobs
 
-    @classmethod
+    # --------------------------------------------
-    def evaluate_queue(cls):
+    # Job Lifecycle Management:
-        not_started = cls.jobs_with_status(RenderStatus.NOT_STARTED, priority_sorted=True)
+    # --------------------------------------------
-        for job in not_started:
-            if cls.is_available_for_job(job.renderer, job.priority):
-                cls.start_job(job)
 
-        scheduled = cls.jobs_with_status(RenderStatus.SCHEDULED, priority_sorted=True)
+    def _add_to_render_queue(self, render_job: BaseRenderWorker, force_start: bool = False) -> None:
-        for job in scheduled:
+        logger.info(f"Adding job to render queue: {render_job}")
-            if job.scheduled_start <= datetime.now():
+        with self._lock:
-                logger.debug(f"Starting scheduled job: {job}")
+            self.job_queue.append(render_job)
-                cls.start_job(job)
+            if force_start and render_job.status in (RenderStatus.NOT_STARTED, RenderStatus.SCHEDULED):
+                self.start_job(render_job)
+            self.session.add(render_job)
+            self.save_state()
+        if self.is_running:
+            self.evaluate_queue()
 
-        if cls.last_saved_counts != cls.job_counts():
+    def _start_job(self, job: BaseRenderWorker) -> None:
-            cls.save_state()
+        logger.info(f'Starting job: {job}')
-
-    @classmethod
-    def start_job(cls, job):
-        logger.info(f'Starting render: {job.name} - Priority {job.priority}')
         job.start()
-        cls.save_state()
+        self.save_state()
 
-    @classmethod
+    def _cancel_job(self, job: BaseRenderWorker) -> bool:
-    def cancel_job(cls, job):
+        logger.info(f'Cancelling job: {job}')
-        logger.info(f'Cancelling job ID: {job.id}')
         job.stop()
         return job.status == RenderStatus.CANCELLED
 
-    @classmethod
+    def _delete_job(self, job: BaseRenderWorker) -> bool:
-    def delete_job(cls, job):
+        logger.info(f"Deleting job: {job}")
-        logger.info(f"Deleting job ID: {job.id}")
+        with self._lock:
-        job.stop()
+            job.stop()
-        cls.job_queue.remove(job)
+            self.job_queue.remove(job)
-        cls.session.delete(job)
+            self.session.delete(job)
-        cls.save_state()
+            self.save_state()
         return True
 
+    # --------------------------------------------
+    # Miscellaneous:
+    # --------------------------------------------
+
+    def _clear_history(self) -> None:
+        for job in list(self.all_jobs()):
+            if job.status in (RenderStatus.CANCELLED, RenderStatus.COMPLETED, RenderStatus.ERROR):
+                self.delete_job(job)
+        self.save_state()
+
+    # --- Forwarders for backward compatibility ---
+
     @classmethod
-    def renderer_instances(cls):
+    def start(cls):
-        from collections import Counter
+        if cls._default_instance is not None:
-        all_instances = [x.renderer for x in cls.running_jobs()]
+            cls._default_instance._start()
-        return Counter(all_instances)
+
+    @classmethod
+    def evaluate_queue(cls):
+        if cls._default_instance is not None:
+            cls._default_instance._evaluate_queue()
+
+    @classmethod
+    def stop(cls):
+        if cls._default_instance is not None:
+            cls._default_instance._stop()
+
+    @classmethod
+    def all_jobs(cls):
+        if cls._default_instance is not None:
+            return cls._default_instance.job_queue
+        return []
+
+    @classmethod
+    def running_jobs(cls):
+        if cls._default_instance is not None:
+            return cls._default_instance._running_jobs()
+        return []
+
+    @classmethod
+    def pending_jobs(cls):
+        if cls._default_instance is not None:
+            return cls._default_instance._pending_jobs()
+        return []
+
+    @classmethod
+    def jobs_with_status(cls, status, priority_sorted=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._jobs_with_status(status, priority_sorted)
+        return []
+
+    @classmethod
+    def job_with_id(cls, job_id, none_ok=False):
+        if cls._default_instance is not None:
+            return cls._default_instance._job_with_id(job_id, none_ok)
+        if not none_ok:
+            raise JobNotFoundError(job_id)
+        return None
 
     @classmethod
     def job_counts(cls):
-        job_counts = {}
+        if cls._default_instance is not None:
-        for job_status in RenderStatus:
+            return cls._default_instance._job_counts()
-            job_counts[job_status.value] = len(cls.jobs_with_status(job_status))
+        return {}
-        return job_counts
+
+    @classmethod
+    def load_state(cls, database_directory):
+        if cls._default_instance is not None:
+            cls._default_instance._load_state(database_directory)
+
+    @classmethod
+    def save_state(cls):
+        if cls._default_instance is not None:
+            cls._default_instance._save_state()
+
+    @classmethod
+    def prepare_for_shutdown(cls):
+        if cls._default_instance is not None:
+            cls._default_instance._prepare_for_shutdown()
+
+    @classmethod
+    def is_available_for_job(cls, renderer, priority=2):
+        if cls._default_instance is not None:
+            return cls._default_instance._is_available_for_job(renderer, priority)
+        return True
+
+    @classmethod
+    def add_to_render_queue(cls, render_job, force_start=False):
+        if cls._default_instance is not None:
+            cls._default_instance._add_to_render_queue(render_job, force_start)
+
+    @classmethod
+    def start_job(cls, job):
+        if cls._default_instance is not None:
+            cls._default_instance._start_job(job)
+
+    @classmethod
+    def cancel_job(cls, job):
+        if cls._default_instance is not None:
+            return cls._default_instance._cancel_job(job)
+        return False
+
+    @classmethod
+    def delete_job(cls, job):
+        if cls._default_instance is not None:
+            return cls._default_instance._delete_job(job)
+        return False
+
+    @classmethod
+    def clear_history(cls):
+        if cls._default_instance is not None:
+            cls._default_instance._clear_history()

src/ui/about_window.py

@@ -0,0 +1,74 @@
+import os
+import sys
+
+from PyQt6.QtCore import Qt
+from PyQt6.QtGui import QPixmap
+from PyQt6.QtWidgets import QDialog, QVBoxLayout, QLabel, QDialogButtonBox, QHBoxLayout
+
+from src.version import *
+
+
+class AboutDialog(QDialog):
+    def __init__(self):
+        super().__init__()
+        self.setWindowTitle(f"About {APP_NAME}")
+
+        # Create the layout
+        layout = QVBoxLayout()
+
+        # App Icon
+        icon_name = 'Server.png'  # todo: temp icon - replace with final later
+        icon_path = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))),
+                                 'resources', icon_name)
+        icon_label = QLabel(self)
+        icon_pixmap = QPixmap(icon_path)
+        icon_label.setPixmap(icon_pixmap)
+        icon_layout = QHBoxLayout()
+        icon_layout.addStretch()
+        icon_layout.addWidget(icon_label)
+        icon_layout.addStretch()
+        layout.addLayout(icon_layout)
+
+        # Application name
+        name_label = QLabel(f"<h2>{APP_NAME}</h2>")
+        layout.addWidget(name_label)
+
+        # Description
+        description_label = QLabel(APP_DESCRIPTION)
+        layout.addWidget(description_label)
+
+        # Version
+        version_label = QLabel(f"<strong>Version:</strong> {APP_VERSION}")
+        layout.addWidget(version_label)
+
+        # Contributors
+        contributors_label = QLabel(f"Copyright © {APP_COPYRIGHT_YEAR} {APP_AUTHOR}")
+        layout.addWidget(contributors_label)
+
+        # License
+        license_label = QLabel(f"Released under {APP_LICENSE}")
+        layout.addWidget(license_label)
+
+        # Add an "OK" button to close the dialog
+        button_box = QDialogButtonBox(QDialogButtonBox.StandardButton.Ok)
+        button_box.accepted.connect(self.accept)
+        layout.addWidget(button_box)
+
+        # Set the layout for the dialog
+        self.setLayout(layout)
+
+        # Make the dialog non-resizable
+        self.setWindowFlags(self.windowFlags() & ~Qt.WindowType.WindowContextHelpButtonHint)
+        self.setFixedSize(self.sizeHint())
+
+
+if __name__ == '__main__':
+    # lazy load GUI frameworks
+    from PyQt6.QtWidgets import QApplication
+
+    # load application
+    app: QApplication = QApplication(sys.argv)
+    window: AboutDialog = AboutDialog()
+    window.show()
+
+    app.exec()

src/ui/add_job.py

@@ -1,523 +0,0 @@
-import copy
-import os.path
-import pathlib
-import socket
-import threading
-
-import psutil
-from PyQt6.QtCore import QThread, pyqtSignal, Qt
-from PyQt6.QtWidgets import (
-    QApplication, QWidget, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit, QPushButton, QFileDialog, QSpinBox, QComboBox,
-    QGroupBox, QCheckBox, QProgressBar, QPlainTextEdit, QDoubleSpinBox, QMessageBox, QListWidget, QListWidgetItem
-)
-from requests import Response
-
-from src.api.server_proxy import RenderServerProxy
-from src.engines.engine_manager import EngineManager
-from src.ui.engine_help_viewer import EngineHelpViewer
-from src.utilities.zeroconf_server import ZeroconfServer
-
-
-class NewRenderJobForm(QWidget):
-    def __init__(self, project_path=None):
-        super().__init__()
-
-        self.project_path = project_path
-
-        # UI
-        self.current_engine_options = None
-        self.file_format_combo = None
-        self.renderer_options_layout = None
-        self.cameras_list = None
-        self.cameras_group = None
-        self.renderer_version_combo = None
-        self.worker_thread = None
-        self.msg_box = None
-        self.engine_help_viewer = None
-        self.raw_args = None
-        self.submit_progress_label = None
-        self.submit_progress = None
-        self.renderer_type = None
-        self.process_label = None
-        self.process_progress_bar = None
-        self.splitjobs_same_os = None
-        self.enable_splitjobs = None
-        self.server_input = None
-        self.submit_button = None
-        self.notes_input = None
-        self.priority_input = None
-        self.end_frame_input = None
-        self.start_frame_input = None
-        self.output_path_input = None
-        self.scene_file_input = None
-        self.scene_file_browse_button = None
-        self.job_name_input = None
-
-        # Job / Server Data
-        self.server_proxy = RenderServerProxy(socket.gethostname())
-        self.renderer_info = None
-        self.project_info = None
-
-        # Setup
-        self.setWindowTitle("New Job")
-        self.setup_ui()
-        self.setup_project()
-
-        # get renderer info in bg thread
-        t = threading.Thread(target=self.update_renderer_info)
-        t.start()
-
-        self.show()
-
-    def setup_ui(self):
-        # Main Layout
-        main_layout = QVBoxLayout(self)
-
-        # Scene File Group
-        scene_file_group = QGroupBox("Project")
-        scene_file_layout = QVBoxLayout(scene_file_group)
-        scene_file_picker_layout = QHBoxLayout()
-        self.scene_file_input = QLineEdit()
-        self.scene_file_input.setText(self.project_path)
-        self.scene_file_browse_button = QPushButton("Browse...")
-        self.scene_file_browse_button.clicked.connect(self.browse_scene_file)
-        scene_file_picker_layout.addWidget(self.scene_file_input)
-        scene_file_picker_layout.addWidget(self.scene_file_browse_button)
-        scene_file_layout.addLayout(scene_file_picker_layout)
-        # progress bar
-        progress_layout = QHBoxLayout()
-        self.process_progress_bar = QProgressBar()
-        self.process_progress_bar.setMinimum(0)
-        self.process_progress_bar.setMaximum(0)
-        self.process_progress_bar.setHidden(True)
-        self.process_label = QLabel("Processing")
-        self.process_label.setHidden(True)
-        progress_layout.addWidget(self.process_label)
-        progress_layout.addWidget(self.process_progress_bar)
-        scene_file_layout.addLayout(progress_layout)
-        main_layout.addWidget(scene_file_group)
-
-        # Server Group
-        # Server List
-        self.server_group = QGroupBox("Server")
-        server_layout = QVBoxLayout(self.server_group)
-        server_list_layout = QHBoxLayout()
-        server_list_layout.setSpacing(0)
-        self.server_input = QComboBox()
-        server_list_layout.addWidget(QLabel("Hostname:"), 1)
-        server_list_layout.addWidget(self.server_input, 3)
-        server_layout.addLayout(server_list_layout)
-        main_layout.addWidget(self.server_group)
-        self.update_server_list()
-        # Priority
-        priority_layout = QHBoxLayout()
-        priority_layout.addWidget(QLabel("Priority:"), 1)
-        self.priority_input = QComboBox()
-        self.priority_input.addItems(["High", "Medium", "Low"])
-        self.priority_input.setCurrentIndex(1)
-        priority_layout.addWidget(self.priority_input, 3)
-        server_layout.addLayout(priority_layout)
-        # Splitjobs
-        self.enable_splitjobs = QCheckBox("Automatically split render across multiple servers")
-        self.enable_splitjobs.setEnabled(True)
-        server_layout.addWidget(self.enable_splitjobs)
-        self.splitjobs_same_os = QCheckBox("Only render on same OS")
-        self.splitjobs_same_os.setEnabled(True)
-        server_layout.addWidget(self.splitjobs_same_os)
-
-        # Output Settings Group
-        self.output_settings_group = QGroupBox("Output Settings")
-        output_settings_layout = QVBoxLayout(self.output_settings_group)
-        # output path
-        output_path_layout = QHBoxLayout()
-        output_path_layout.addWidget(QLabel("Render name:"))
-        self.output_path_input = QLineEdit()
-        output_path_layout.addWidget(self.output_path_input)
-        output_settings_layout.addLayout(output_path_layout)
-        # file format
-        file_format_layout = QHBoxLayout()
-        file_format_layout.addWidget(QLabel("Format:"))
-        self.file_format_combo = QComboBox()
-        file_format_layout.addWidget(self.file_format_combo)
-        output_settings_layout.addLayout(file_format_layout)
-        # frame range
-        frame_range_layout = QHBoxLayout(self.output_settings_group)
-        self.start_frame_input = QSpinBox()
-        self.start_frame_input.setRange(1, 99999)
-        self.end_frame_input = QSpinBox()
-        self.end_frame_input.setRange(1, 99999)
-        frame_range_layout.addWidget(QLabel("Frames:"))
-        frame_range_layout.addWidget(self.start_frame_input)
-        frame_range_layout.addWidget(QLabel("to"))
-        frame_range_layout.addWidget(self.end_frame_input)
-        output_settings_layout.addLayout(frame_range_layout)
-        # resolution
-        resolution_layout = QHBoxLayout(self.output_settings_group)
-        self.resolution_x_input = QSpinBox()
-        self.resolution_x_input.setRange(1, 9999)  # Assuming max resolution width 9999
-        self.resolution_x_input.setValue(1920)
-        self.resolution_y_input = QSpinBox()
-        self.resolution_y_input.setRange(1, 9999)  # Assuming max resolution height 9999
-        self.resolution_y_input.setValue(1080)
-        self.frame_rate_input = QDoubleSpinBox()
-        self.frame_rate_input.setRange(1, 9999)  # Assuming max resolution width 9999
-        self.frame_rate_input.setDecimals(3)
-        self.frame_rate_input.setValue(23.976)
-        resolution_layout.addWidget(QLabel("Resolution:"))
-        resolution_layout.addWidget(self.resolution_x_input)
-        resolution_layout.addWidget(QLabel("x"))
-        resolution_layout.addWidget(self.resolution_y_input)
-        resolution_layout.addWidget(QLabel("@"))
-        resolution_layout.addWidget(self.frame_rate_input)
-        resolution_layout.addWidget(QLabel("fps"))
-        output_settings_layout.addLayout(resolution_layout)
-        # add group to layout
-        main_layout.addWidget(self.output_settings_group)
-
-        # Renderer Group
-        self.renderer_group = QGroupBox("Renderer Settings")
-        renderer_group_layout = QVBoxLayout(self.renderer_group)
-        renderer_layout = QHBoxLayout()
-        renderer_layout.addWidget(QLabel("Renderer:"))
-        self.renderer_type = QComboBox()
-        self.renderer_type.currentIndexChanged.connect(self.renderer_changed)
-        renderer_layout.addWidget(self.renderer_type)
-        # Version
-        renderer_layout.addWidget(QLabel("Version:"))
-        self.renderer_version_combo = QComboBox()
-        renderer_layout.addWidget(self.renderer_version_combo)
-        renderer_group_layout.addLayout(renderer_layout)
-        # dynamic options
-        self.renderer_options_layout = QVBoxLayout()
-        renderer_group_layout.addLayout(self.renderer_options_layout)
-        # Raw Args
-        raw_args_layout = QHBoxLayout(self.renderer_group)
-        raw_args_layout.addWidget(QLabel("Raw Args:"))
-        self.raw_args = QLineEdit()
-        raw_args_layout.addWidget(self.raw_args)
-        args_help_button = QPushButton("?")
-        args_help_button.clicked.connect(self.args_help_button_clicked)
-        raw_args_layout.addWidget(args_help_button)
-        renderer_group_layout.addLayout(raw_args_layout)
-        main_layout.addWidget(self.renderer_group)
-
-        # Cameras Group
-        self.cameras_group = QGroupBox("Cameras")
-        cameras_layout = QVBoxLayout(self.cameras_group)
-        self.cameras_list = QListWidget()
-        self.cameras_group.setHidden(True)
-        cameras_layout.addWidget(self.cameras_list)
-        main_layout.addWidget(self.cameras_group)
-
-        # Notes Group
-        self.notes_group = QGroupBox("Additional Notes")
-        notes_layout = QVBoxLayout(self.notes_group)
-        self.notes_input = QPlainTextEdit()
-        notes_layout.addWidget(self.notes_input)
-        main_layout.addWidget(self.notes_group)
-
-        # Submit Button
-        self.submit_button = QPushButton("Submit Job")
-        self.submit_button.clicked.connect(self.submit_job)
-        main_layout.addWidget(self.submit_button)
-
-        self.submit_progress = QProgressBar()
-        self.submit_progress.setMinimum(0)
-        self.submit_progress.setMaximum(0)
-        self.submit_progress.setHidden(True)
-        main_layout.addWidget(self.submit_progress)
-
-        self.submit_progress_label = QLabel("Submitting...")
-        self.submit_progress_label.setHidden(True)
-        main_layout.addWidget(self.submit_progress_label)
-
-        self.toggle_renderer_enablement(False)
-
-    def update_renderer_info(self):
-        self.renderer_info = self.server_proxy.get_renderer_info()
-        self.renderer_type.addItems(self.renderer_info.keys())
-        self.renderer_changed()
-
-    def renderer_changed(self):
-        # load the version numbers
-        current_renderer = self.renderer_type.currentText().lower() or self.renderer_type.itemText(0)
-        self.renderer_version_combo.clear()
-        self.file_format_combo.clear()
-        if current_renderer:
-            renderer_vers = [version_info['version'] for version_info in self.renderer_info[current_renderer]['versions']]
-            self.renderer_version_combo.addItems(renderer_vers)
-            self.file_format_combo.addItems(self.renderer_info[current_renderer]['supported_export_formats'])
-
-    def update_server_list(self):
-        clients = ZeroconfServer.found_hostnames()
-        self.server_input.clear()
-        self.server_input.addItems(clients)
-
-    def browse_scene_file(self):
-        file_name, _ = QFileDialog.getOpenFileName(self, "Select Scene File")
-        if file_name:
-            self.scene_file_input.setText(file_name)
-            self.setup_project()
-
-    def setup_project(self):
-        # UI stuff on main thread
-        self.process_progress_bar.setHidden(False)
-        self.process_label.setHidden(False)
-        self.toggle_renderer_enablement(False)
-
-        output_name, _ = os.path.splitext(os.path.basename(self.scene_file_input.text()))
-        output_name = output_name.replace(' ', '_')
-        self.output_path_input.setText(output_name)
-        file_name = self.scene_file_input.text()
-
-        # setup bg worker
-        self.worker_thread = GetProjectInfoWorker(window=self, project_path=file_name)
-        self.worker_thread.message_signal.connect(self.post_get_project_info_update)
-        self.worker_thread.start()
-
-    def browse_output_path(self):
-        directory = QFileDialog.getExistingDirectory(self, "Select Output Directory")
-        if directory:
-            self.output_path_input.setText(directory)
-
-    def args_help_button_clicked(self):
-        url = (f'http://{self.server_proxy.hostname}:{self.server_proxy.port}/api/renderer/'
-               f'{self.renderer_type.currentText()}/help')
-        self.engine_help_viewer = EngineHelpViewer(url)
-        self.engine_help_viewer.show()
-
-# -------- Update --------
-
-    def post_get_project_info_update(self):
-        """Called by the GetProjectInfoWorker - Do not call directly."""
-        try:
-            # Set the best renderer we can find
-            input_path = self.scene_file_input.text()
-            engine = EngineManager.engine_for_project_path(input_path)
-            index = self.renderer_type.findText(engine.name().lower())
-            if index >= 0:
-                self.renderer_type.setCurrentIndex(index)
-
-            self.output_path_input.setText(os.path.basename(input_path))
-
-            # cleanup progress UI
-            self.process_progress_bar.setHidden(True)
-            self.process_label.setHidden(True)
-            self.toggle_renderer_enablement(True)
-
-            # Load scene data
-            self.start_frame_input.setValue(self.project_info.get('frame_start'))
-            self.end_frame_input.setValue(self.project_info.get('frame_end'))
-            self.resolution_x_input.setValue(self.project_info.get('resolution_x'))
-            self.resolution_y_input.setValue(self.project_info.get('resolution_y'))
-            self.frame_rate_input.setValue(self.project_info.get('fps'))
-
-            # Cameras
-            self.cameras_list.clear()
-            if self.project_info.get('cameras'):
-                self.cameras_group.setHidden(False)
-                found_active = False
-                for camera in self.project_info['cameras']:
-                    # create the list items and make them checkable
-                    item = QListWidgetItem(f"{camera['name']} - {camera['lens']}mm")
-                    item.setFlags(item.flags() | Qt.ItemFlag.ItemIsUserCheckable)
-                    is_checked = camera['is_active'] or len(self.project_info['cameras']) == 1
-                    found_active = found_active or is_checked
-                    item.setCheckState(Qt.CheckState.Checked if is_checked else Qt.CheckState.Unchecked)
-                    self.cameras_list.addItem(item)
-                if not found_active:
-                    self.cameras_list.item(0).setCheckState(Qt.CheckState.Checked)
-            else:
-                self.cameras_group.setHidden(True)
-
-            # Dynamic Engine Options
-            engine_name = self.renderer_type.currentText()
-            engine = EngineManager.engine_with_name(engine_name)
-            # clear old options
-            clear_layout(self.renderer_options_layout)
-            # dynamically populate option list
-            self.current_engine_options = engine().get_options()
-            for option in self.current_engine_options:
-                h_layout = QHBoxLayout()
-                label = QLabel(option['name'].capitalize() + ':')
-                h_layout.addWidget(label)
-                if option.get('options'):
-                    combo_box = QComboBox()
-                    for opt in option['options']:
-                        combo_box.addItem(opt)
-                    h_layout.addWidget(combo_box)
-                else:
-                    text_box = QLineEdit()
-                    h_layout.addWidget(text_box)
-                self.renderer_options_layout.addLayout(h_layout)
-        except AttributeError as e:
-            pass
-
-    def toggle_renderer_enablement(self, enabled=False):
-        """Toggle on/off all the render settings"""
-        self.server_group.setHidden(not enabled)
-        self.output_settings_group.setHidden(not enabled)
-        self.renderer_group.setHidden(not enabled)
-        self.notes_group.setHidden(not enabled)
-        if not enabled:
-            self.cameras_group.setHidden(True)
-        self.submit_button.setEnabled(enabled)
-
-    def after_job_submission(self, result):
-
-        # UI cleanup
-        self.submit_progress.setMaximum(0)
-        self.submit_button.setHidden(False)
-        self.submit_progress.setHidden(True)
-        self.submit_progress_label.setHidden(True)
-        self.process_progress_bar.setHidden(True)
-        self.process_label.setHidden(True)
-        self.toggle_renderer_enablement(True)
-
-        self.msg_box = QMessageBox()
-        if result.ok:
-            self.msg_box.setStandardButtons(QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No)
-            self.msg_box.setIcon(QMessageBox.Icon.Information)
-            self.msg_box.setText("Job successfully submitted to server. Submit another?")
-            self.msg_box.setWindowTitle("Success")
-            x = self.msg_box.exec()
-            if x == QMessageBox.StandardButton.No:
-                self.close()
-        else:
-            self.msg_box.setStandardButtons(QMessageBox.StandardButton.Ok)
-            self.msg_box.setIcon(QMessageBox.Icon.Critical)
-            self.msg_box.setText(result.text or "Unknown error")
-            self.msg_box.setWindowTitle("Error")
-            self.msg_box.exec()
-
-# -------- Submit Job Calls --------
-
-    def submit_job(self):
-
-        # Pre-worker UI
-        self.submit_progress.setHidden(False)
-        self.submit_progress_label.setHidden(False)
-        self.submit_button.setHidden(True)
-        self.submit_progress.setMaximum(0)
-
-        # submit job in background thread
-        self.worker_thread = SubmitWorker(window=self)
-        self.worker_thread.message_signal.connect(self.after_job_submission)
-        self.worker_thread.start()
-
-
-class SubmitWorker(QThread):
-    """Worker class called to submit all the jobs to the server and update the UI accordingly"""
-
-    message_signal = pyqtSignal(Response)
-
-    def __init__(self, window):
-        super().__init__()
-        self.window = window
-
-    def run(self):
-        def create_callback(encoder):
-            encoder_len = encoder.len
-
-            def callback(monitor):
-                percent = f"{monitor.bytes_read / encoder_len * 100:.0f}"
-                self.window.submit_progress_label.setText(f"Transferring to {hostname} - {percent}%")
-                self.window.submit_progress.setMaximum(100)
-                self.window.submit_progress.setValue(int(percent))
-
-            return callback
-
-        hostname = self.window.server_input.currentText()
-        job_json = {'owner': psutil.Process().username() + '@' + socket.gethostname(),
-                    'renderer': self.window.renderer_type.currentText().lower(),
-                    'renderer_version': self.window.renderer_version_combo.currentText(),
-                    'args': {'raw': self.window.raw_args.text()},
-                    'output_path': self.window.output_path_input.text(),
-                    'start_frame': self.window.start_frame_input.value(),
-                    'end_frame': self.window.end_frame_input.value(),
-                    'priority': self.window.priority_input.currentIndex() + 1,
-                    'notes': self.window.notes_input.toPlainText(),
-                    'enable_split_jobs': self.window.enable_splitjobs.isChecked(),
-                    'split_jobs_same_os': self.window.splitjobs_same_os.isChecked()}
-
-        # get the dynamic args
-        for i in range(self.window.renderer_options_layout.count()):
-            item = self.window.renderer_options_layout.itemAt(i)
-            layout = item.layout()  # get the layout
-            for x in range(layout.count()):
-                z = layout.itemAt(x)
-                widget = z.widget()
-                if isinstance(widget, QComboBox):
-                    job_json['args'][self.window.current_engine_options[i]['name']] = widget.currentText()
-                elif isinstance(widget, QLineEdit):
-                    job_json['args'][self.window.current_engine_options[i]['name']] = widget.text()
-
-        # determine if any cameras are checked
-        selected_cameras = []
-        if self.window.cameras_list.count() and not self.window.cameras_group.isHidden():
-            for index in range(self.window.cameras_list.count()):
-                item = self.window.cameras_list.item(index)
-                if item.checkState() == Qt.CheckState.Checked:
-                    selected_cameras.append(item.text().rsplit('-', 1)[0].strip())  # cleanup to just camera name
-
-        # process cameras into nested format
-        input_path = self.window.scene_file_input.text()
-        if selected_cameras:
-            job_list = []
-            for cam in selected_cameras:
-                job_copy = copy.deepcopy(job_json)
-                job_copy['args']['camera'] = cam
-                job_copy['name'] = pathlib.Path(input_path).stem.replace(' ', '_') + "-" + cam.replace(' ', '')
-                job_list.append(job_copy)
-        else:
-            job_list = [job_json]
-
-        # presubmission tasks
-        engine = EngineManager.engine_with_name(self.window.renderer_type.currentText().lower())
-        input_path = engine().perform_presubmission_tasks(input_path)
-        # submit
-        result = self.window.server_proxy.post_job_to_server(file_path=input_path, job_list=job_list,
-                                                      callback=create_callback)
-        self.message_signal.emit(result)
-
-
-class GetProjectInfoWorker(QThread):
-    """Worker class called to retrieve information about a project file on a background thread and update the UI"""
-
-    message_signal = pyqtSignal()
-
-    def __init__(self, window, project_path):
-        super().__init__()
-        self.window = window
-        self.project_path = project_path
-
-    def run(self):
-        engine = EngineManager.engine_for_project_path(self.project_path)
-        self.window.project_info = engine().get_project_info(self.project_path)
-        self.message_signal.emit()
-
-
-def clear_layout(layout):
-    if layout is not None:
-        # Go through the layout's items in reverse order
-        for i in reversed(range(layout.count())):
-            # Take the item at the current position
-            item = layout.takeAt(i)
-
-            # Check if the item is a widget
-            if item.widget():
-                # Remove the widget and delete it
-                widget_to_remove = item.widget()
-                widget_to_remove.setParent(None)
-                widget_to_remove.deleteLater()
-            elif item.layout():
-                # If the item is a sub-layout, clear its contents recursively
-                clear_layout(item.layout())
-                # Then delete the layout
-                item.layout().deleteLater()
-
-# Run the application
-if __name__ == '__main__':
-    app = QApplication([])
-    window = NewRenderJobForm()
-    app.exec()

src/ui/add_job_window.py

@@ -0,0 +1,690 @@
+import logging
+import socket
+from pathlib import Path
+
+import psutil
+from PyQt6.QtCore import QThread, pyqtSignal, Qt, pyqtSlot
+
+logger = logging.getLogger(__name__)
+from PyQt6.QtWidgets import (
+    QApplication, QWidget, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit, QPushButton, QFileDialog, QSpinBox, QComboBox,
+    QGroupBox, QCheckBox, QProgressBar, QPlainTextEdit, QDoubleSpinBox, QMessageBox, QListWidget, QListWidgetItem,
+    QTabWidget
+)
+
+from src.api.server_proxy import RenderServerProxy
+from src.engines.engine_manager import EngineManager
+from src.ui.engine_help_window import EngineHelpViewer
+from src.utilities.misc_helper import COMMON_RESOLUTIONS, COMMON_FRAME_RATES
+from src.utilities.zeroconf_server import ZeroconfServer
+
+
+class NewRenderJobForm(QWidget):
+    def __init__(self, project_path=None):
+        super().__init__()
+        self.resolution_options_list = None
+        self.resolution_x_input = None
+        self.resolution_y_input = None
+        self.fps_options_list = None
+        self.fps_input = None
+        self.engine_group = None
+        self.notes_group = None
+        self.output_settings_group = None
+        self.project_path = project_path
+
+        # UI
+        self.project_group = None
+        self.load_file_group = None
+        self.current_engine_options = None
+        self.file_format_combo = None
+        self.engine_options_layout = None
+        self.cameras_list = None
+        self.cameras_group = None
+        self.engine_version_combo = None
+        self.worker_thread = None
+        self.msg_box = None
+        self.engine_help_viewer = None
+        self.raw_args = None
+        self.submit_progress_label = None
+        self.submit_progress = None
+        self.engine_type = None
+        self.process_label = None
+        self.process_progress_bar = None
+        self.splitjobs_same_os = None
+        self.enable_splitjobs = None
+        self.server_input = None
+        self.submit_button = None
+        self.notes_input = None
+        self.priority_input = None
+        self.end_frame_input = None
+        self.start_frame_input = None
+        self.job_name_input = None
+        self.scene_file_input = None
+        self.scene_file_browse_button = None
+        self.tabs = None
+
+        # Job / Server Data
+        self.server_proxy = RenderServerProxy(socket.gethostname())
+        self.project_info = None
+        self.installed_engines = []
+        self.preferred_engine = None
+
+        # Setup
+        self.setWindowTitle("New Job")
+        self.setup_ui()
+        self.setup_project()
+
+        self.show()
+
+    def setup_ui(self):
+        # Main widget layout
+        main_layout = QVBoxLayout(self)
+
+        # Tabs
+        self.tabs = QTabWidget()
+
+        # ==================== Loading Section (outside tabs) ====================
+        self.load_file_group = QGroupBox("Loading")
+        load_file_layout = QVBoxLayout(self.load_file_group)
+
+        progress_layout = QHBoxLayout()
+        self.process_label = QLabel("Processing")
+        self.process_progress_bar = QProgressBar()
+        self.process_progress_bar.setMinimum(0)
+        self.process_progress_bar.setMaximum(0)  # Indeterminate
+        progress_layout.addWidget(self.process_label)
+        progress_layout.addWidget(self.process_progress_bar)
+        load_file_layout.addLayout(progress_layout)
+
+        # Scene File
+        job_overview_group = QGroupBox("Project File")
+        file_group_layout = QVBoxLayout(job_overview_group)
+
+        # Job Name
+        job_name_layout = QHBoxLayout()
+        job_name_layout.addWidget(QLabel("Job name:"))
+        self.job_name_input = QLineEdit()
+        job_name_layout.addWidget(self.job_name_input)
+        self.engine_type = QComboBox()
+        job_name_layout.addWidget(self.engine_type)
+        file_group_layout.addLayout(job_name_layout)
+
+        # Job File
+        scene_file_picker_layout = QHBoxLayout()
+        scene_file_picker_layout.addWidget(QLabel("File:"))
+        self.scene_file_input = QLineEdit()
+        self.scene_file_input.setText(self.project_path)
+        self.scene_file_browse_button = QPushButton("Browse...")
+        self.scene_file_browse_button.clicked.connect(self.browse_scene_file)
+        scene_file_picker_layout.addWidget(self.scene_file_input)
+        scene_file_picker_layout.addWidget(self.scene_file_browse_button)
+        file_group_layout.addLayout(scene_file_picker_layout)
+
+        main_layout.addWidget(job_overview_group)
+
+        main_layout.addWidget(self.load_file_group)
+        main_layout.addWidget(self.tabs)
+
+        # ==================== Tab 1: Job Settings ====================
+        self.project_group = QWidget()
+        project_layout = QVBoxLayout(self.project_group)  # Fixed: proper parent
+
+        # Server / Hostname
+        server_list_layout = QHBoxLayout()
+        server_list_layout.addWidget(QLabel("Render Target:"))
+        self.server_input = QComboBox()
+        self.server_input.currentTextChanged.connect(self.server_changed)
+        server_list_layout.addWidget(self.server_input)
+        project_layout.addLayout(server_list_layout)
+
+        # Priority
+        priority_layout = QHBoxLayout()
+        priority_layout.addWidget(QLabel("Priority:"))
+        self.priority_input = QComboBox()
+        self.priority_input.addItems(["High", "Medium", "Low"])
+        self.priority_input.setCurrentIndex(1)
+        priority_layout.addWidget(self.priority_input)
+        project_layout.addLayout(priority_layout)
+
+        # Split Jobs Options
+        self.enable_splitjobs = QCheckBox("Automatically split render across multiple servers")
+        project_layout.addWidget(self.enable_splitjobs)
+
+        self.splitjobs_same_os = QCheckBox("Only render on same OS")
+        project_layout.addWidget(self.splitjobs_same_os)
+
+        project_layout.addStretch()  # Push everything up
+
+        # ==================== Tab 2: Output Settings ====================
+        self.output_settings_group = QWidget()
+        output_settings_layout = QVBoxLayout(self.output_settings_group)
+
+        # File Format
+        format_group = QGroupBox("Format / Range")
+        output_settings_layout.addWidget(format_group)
+        format_group_layout = QVBoxLayout()
+        format_group.setLayout(format_group_layout)
+        file_format_layout = QHBoxLayout()
+        file_format_layout.addWidget(QLabel("Format:"))
+        self.file_format_combo = QComboBox()
+        self.file_format_combo.setFixedWidth(200)
+        file_format_layout.addWidget(self.file_format_combo)
+        file_format_layout.addStretch()
+        format_group_layout.addLayout(file_format_layout)
+
+        # Frame Range
+        frame_range_layout = QHBoxLayout()
+        frame_range_layout.addWidget(QLabel("Frames:"))
+        self.start_frame_input = QSpinBox()
+        self.start_frame_input.setRange(1, 99999)
+        self.start_frame_input.setFixedWidth(80)
+        self.end_frame_input = QSpinBox()
+        self.end_frame_input.setRange(1, 99999)
+        self.end_frame_input.setFixedWidth(80)
+        frame_range_layout.addWidget(self.start_frame_input)
+        frame_range_layout.addWidget(QLabel("to"))
+        frame_range_layout.addWidget(self.end_frame_input)
+        frame_range_layout.addStretch()
+        format_group_layout.addLayout(frame_range_layout)
+
+        # --- Resolution & FPS Group ---
+        resolution_group = QGroupBox("Resolution / Frame Rate")
+        output_settings_layout.addWidget(resolution_group)
+        resolution_group_layout = QVBoxLayout()
+        resolution_group.setLayout(resolution_group_layout)
+
+        # Resolution
+        resolution_layout = QHBoxLayout()
+        self.resolution_options_list = QComboBox()
+        self.resolution_options_list.setFixedWidth(200)
+        self.resolution_options_list.addItem("Original Size")
+        for res in COMMON_RESOLUTIONS:
+            self.resolution_options_list.addItem(res)
+        self.resolution_options_list.currentIndexChanged.connect(self._resolution_preset_changed)
+        resolution_layout.addWidget(self.resolution_options_list)
+        resolution_group_layout.addLayout(resolution_layout)
+        self.resolution_x_input = QSpinBox()
+        self.resolution_x_input.setRange(1, 9999)
+        self.resolution_x_input.setValue(1920)
+        self.resolution_x_input.setFixedWidth(80)
+        resolution_layout.addWidget(self.resolution_x_input)
+        self.resolution_y_input = QSpinBox()
+        self.resolution_y_input.setRange(1, 9999)
+        self.resolution_y_input.setValue(1080)
+        self.resolution_y_input.setFixedWidth(80)
+        resolution_layout.addWidget(QLabel("x"))
+        resolution_layout.addWidget(self.resolution_y_input)
+        resolution_layout.addStretch()
+
+        fps_layout = QHBoxLayout()
+        self.fps_options_list = QComboBox()
+        self.fps_options_list.setFixedWidth(200)
+        self.fps_options_list.addItem("Original FPS")
+        for fps_option in COMMON_FRAME_RATES:
+            self.fps_options_list.addItem(fps_option)
+        self.fps_options_list.currentIndexChanged.connect(self._fps_preset_changed)
+        fps_layout.addWidget(self.fps_options_list)
+
+        self.fps_input = QDoubleSpinBox()
+        self.fps_input.setDecimals(3)
+        self.fps_input.setRange(1.0, 999.0)
+        self.fps_input.setValue(23.976)
+        self.fps_input.setFixedWidth(80)
+
+        fps_layout.addWidget(self.fps_input)
+        fps_layout.addWidget(QLabel("fps"))
+        fps_layout.addStretch()
+        resolution_group_layout.addLayout(fps_layout)
+
+        output_settings_layout.addStretch()
+
+        # ==================== Tab 3: Engine Settings ====================
+        self.engine_group = QWidget()
+        engine_group_layout = QVBoxLayout(self.engine_group)
+
+        engine_layout = QHBoxLayout()
+        engine_layout.addWidget(QLabel("Engine Version:"))
+        self.engine_version_combo = QComboBox()
+        self.engine_version_combo.addItem('latest')
+        engine_layout.addWidget(self.engine_version_combo)
+        engine_group_layout.addLayout(engine_layout)
+
+        # Dynamic engine options
+        self.engine_options_layout = QVBoxLayout()
+        engine_group_layout.addLayout(self.engine_options_layout)
+
+        # Raw Args
+        raw_args_layout = QHBoxLayout()
+        raw_args_layout.addWidget(QLabel("Raw Args:"))
+        self.raw_args = QLineEdit()
+        raw_args_layout.addWidget(self.raw_args)
+        args_help_button = QPushButton("?")
+        args_help_button.clicked.connect(self.args_help_button_clicked)
+        raw_args_layout.addWidget(args_help_button)
+        engine_group_layout.addLayout(raw_args_layout)
+        engine_group_layout.addStretch()
+
+        # ==================== Tab 4: Cameras ====================
+        self.cameras_group = QWidget()
+        cameras_layout = QVBoxLayout(self.cameras_group)
+        self.cameras_list = QListWidget()
+        self.cameras_list.itemChanged.connect(self.update_job_count)
+        cameras_layout.addWidget(self.cameras_list)
+
+        # ==================== Tab 5: Misc / Notes ====================
+        self.notes_group = QWidget()
+        notes_layout = QVBoxLayout(self.notes_group)
+        self.notes_input = QPlainTextEdit()
+        notes_layout.addWidget(self.notes_input)
+
+        # == Create Tabs
+        self.tabs.addTab(self.project_group, "Job Settings")
+        self.tabs.addTab(self.output_settings_group, "Output Settings")
+        self.tabs.addTab(self.engine_group, "Engine Settings")
+        self.tabs.addTab(self.cameras_group, "Cameras")
+        self.tabs.addTab(self.notes_group, "Notes")
+        self.update_server_list()
+
+        index = self.tabs.indexOf(self.cameras_group)
+        if index != -1:
+            self.tabs.setTabEnabled(index, False)
+
+        # ==================== Submit Section (outside tabs) ====================
+        self.submit_button = QPushButton("Submit Job")
+        self.submit_button.clicked.connect(self.submit_job)
+        main_layout.addWidget(self.submit_button)
+
+        self.submit_progress = QProgressBar()
+        self.submit_progress.setMinimum(0)
+        self.submit_progress.setMaximum(0)
+        self.submit_progress.setHidden(True)
+        main_layout.addWidget(self.submit_progress)
+
+        self.submit_progress_label = QLabel("Submitting...")
+        self.submit_progress_label.setHidden(True)
+        main_layout.addWidget(self.submit_progress_label)
+
+        # Initial engine state
+        self.toggle_engine_enablement(False)
+        self.tabs.setCurrentIndex(0)
+
+    def update_job_count(self, changed_item=None):
+        checked = 1
+        if self.cameras_group.isEnabled():
+            checked = 0
+            total = self.cameras_list.count()
+
+            for i in range(total):
+                item = self.cameras_list.item(i)
+                if item.checkState() == Qt.CheckState.Checked:
+                    checked += 1
+
+        message = f"Submit {checked} Jobs" if checked > 1 else "Submit Job"
+        self.submit_button.setText(message)
+        self.submit_button.setEnabled(bool(checked))
+
+    def _resolution_preset_changed(self, index):
+        selected_res = COMMON_RESOLUTIONS.get(self.resolution_options_list.currentText())
+        if selected_res:
+            self.resolution_x_input.setValue(selected_res[0])
+            self.resolution_y_input.setValue(selected_res[1])
+        elif index == 0:
+            self.resolution_x_input.setValue(self.project_info.get('resolution_x'))
+            self.resolution_y_input.setValue(self.project_info.get('resolution_y'))
+
+    def _fps_preset_changed(self, index):
+        selected_fps = COMMON_FRAME_RATES.get(self.fps_options_list.currentText())
+        if selected_fps:
+            self.fps_input.setValue(selected_fps)
+        elif index == 0:
+            self.fps_input.setValue(self.project_info.get('fps'))
+
+    def engine_changed(self):
+        # load the version numbers
+        current_engine = self.engine_type.currentText().lower() or self.engine_type.itemText(0)
+        self.engine_version_combo.clear()
+        self.engine_version_combo.addItem('latest')
+        self.file_format_combo.clear()
+        if current_engine:
+            engine_info = self.server_proxy.get_engine(current_engine, 'full', timeout=10)
+            self.current_engine_options = engine_info.get('options', [])
+            if not engine_info:
+                raise FileNotFoundError(f"Cannot get information about engine '{current_engine}'")
+            engine_vers = [v['version'] for v in engine_info['versions']]
+            self.engine_version_combo.addItems(engine_vers)
+            self.file_format_combo.addItems(engine_info.get('supported_export_formats'))
+
+    def server_changed(self, hostname):
+        if not hostname:
+            return
+
+        self.server_proxy = RenderServerProxy(hostname)
+
+        if self.engine_type and self.engine_type.count():
+            try:
+                self.engine_changed()
+            except Exception as e:
+                logger.error(f"Error updating engine data for server '{hostname}': {e}")
+
+    def update_server_list(self):
+        current_hostname = self.server_input.currentText()
+        clients = ZeroconfServer.found_hostnames()
+        self.server_input.clear()
+        self.server_input.addItems(clients)
+        if current_hostname and current_hostname in clients:
+            self.server_input.setCurrentText(current_hostname)
+        elif clients:
+            self.server_changed(clients[0])
+
+    def browse_scene_file(self):
+        file_name, _ = QFileDialog.getOpenFileName(self, "Select Scene File")
+        if file_name:
+            self.scene_file_input.setText(file_name)
+            self.setup_project()
+
+    def setup_project(self):
+        # UI stuff on main thread
+        self.process_progress_bar.setHidden(False)
+        self.process_label.setHidden(False)
+        self.toggle_engine_enablement(False)
+
+        output_name = Path(self.scene_file_input.text()).stem.replace(' ', '_')
+        self.job_name_input.setText(output_name)
+        file_name = self.scene_file_input.text()
+
+        # setup bg worker
+        self.worker_thread = GetProjectInfoWorker(window=self, project_path=file_name)
+        self.worker_thread.message_signal.connect(self.post_get_project_info_update)
+        self.worker_thread.error_signal.connect(self.show_error_message)
+        self.worker_thread.start()
+
+    def browse_output_path(self):
+        directory = QFileDialog.getExistingDirectory(self, "Select Output Directory")
+        if directory:
+            self.job_name_input.setText(directory)
+
+    def args_help_button_clicked(self):
+        url = (f'http://{self.server_proxy.hostname}:{self.server_proxy.port}/api/engines/'
+               f'{self.engine_type.currentText()}/help')
+        self.engine_help_viewer = EngineHelpViewer(url)
+        self.engine_help_viewer.show()
+
+    def show_error_message(self, message):
+        msg = QMessageBox(self)
+        msg.setIcon(QMessageBox.Icon.Critical)
+        msg.setWindowTitle("Error")
+        msg.setText(message)
+        msg.exec()
+
+# -------- Update --------
+
+    def post_get_project_info_update(self):
+        """Called by the GetProjectInfoWorker - Do not call directly."""
+        try:
+
+            self.engine_type.addItems(self.installed_engines)
+            self.engine_type.setCurrentText(self.preferred_engine)
+            self.engine_changed()
+
+            # Set the best engine we can find
+            input_path = self.scene_file_input.text()
+            engine = EngineManager.engine_class_for_project_path(input_path)
+
+            engine_index = self.engine_type.findText(engine.name().lower())
+            if engine_index >= 0:
+                self.engine_type.setCurrentIndex(engine_index)
+            else:
+                self.engine_type.setCurrentIndex(0)  #todo: find out why we don't have engine info yet
+                # not ideal but if we don't have the engine info we have to pick something
+
+            # cleanup progress UI
+            self.load_file_group.setHidden(True)
+            self.toggle_engine_enablement(True)
+
+            # Load scene data
+            self.start_frame_input.setValue(self.project_info.get('frame_start'))
+            self.end_frame_input.setValue(self.project_info.get('frame_end'))
+            self.resolution_x_input.setValue(self.project_info.get('resolution_x'))
+            self.resolution_y_input.setValue(self.project_info.get('resolution_y'))
+            self.fps_input.setValue(self.project_info.get('fps'))
+
+            # Cameras
+            self.cameras_list.clear()
+            index = self.tabs.indexOf(self.cameras_group)
+            if self.project_info.get('cameras'):
+                self.tabs.setTabEnabled(index, True)
+                found_active = False
+                for camera in self.project_info['cameras']:
+                    # create the list items and make them checkable
+                    item = QListWidgetItem(f"{camera['name']} - {camera['lens']}mm")
+                    item.setFlags(item.flags() | Qt.ItemFlag.ItemIsUserCheckable)
+                    is_checked = camera['is_active'] or len(self.project_info['cameras']) == 1
+                    found_active = found_active or is_checked
+                    item.setCheckState(Qt.CheckState.Checked if is_checked else Qt.CheckState.Unchecked)
+                    self.cameras_list.addItem(item)
+                if not found_active:
+                    self.cameras_list.item(0).setCheckState(Qt.CheckState.Checked)
+            else:
+                self.tabs.setTabEnabled(index, False)
+            self.update_job_count()
+
+            # Dynamic Engine Options
+            clear_layout(self.engine_options_layout)  # clear old options
+            # dynamically populate option list
+            for option in self.current_engine_options:
+                h_layout = QHBoxLayout()
+                label = QLabel(option['name'].replace('_', ' ').capitalize() + ':')
+                h_layout.addWidget(label)
+                if option.get('options'):
+                    combo_box = QComboBox()
+                    for opt in option['options']:
+                        combo_box.addItem(opt)
+                    h_layout.addWidget(combo_box)
+                else:
+                    text_box = QLineEdit()
+                    h_layout.addWidget(text_box)
+                self.engine_options_layout.addLayout(h_layout)
+        except AttributeError as e:
+            logger.error(f"AttributeError in post_get_project_info_update: {e}")
+
+    def toggle_engine_enablement(self, enabled=False):
+        """Toggle on/off all the render settings"""
+        indexes = [self.tabs.indexOf(self.project_group),
+                   self.tabs.indexOf(self.output_settings_group),
+                   self.tabs.indexOf(self.engine_group),
+                   self.tabs.indexOf(self.cameras_group),
+                   self.tabs.indexOf(self.notes_group)]
+        for idx in indexes:
+            self.tabs.setTabEnabled(idx, enabled)
+        self.submit_button.setEnabled(enabled)
+
+    def after_job_submission(self, error_string):
+
+        # UI cleanup
+        self.submit_progress.setMaximum(0)
+        self.submit_button.setHidden(False)
+        self.submit_progress.setHidden(True)
+        self.submit_progress_label.setHidden(True)
+        self.process_progress_bar.setHidden(True)
+        self.process_label.setHidden(True)
+        self.toggle_engine_enablement(True)
+
+        self.msg_box = QMessageBox()
+        if not error_string:
+            self.msg_box.setStandardButtons(QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No)
+            self.msg_box.setIcon(QMessageBox.Icon.Information)
+            self.msg_box.setText("Job successfully submitted to server. Submit another?")
+            self.msg_box.setWindowTitle("Success")
+            x = self.msg_box.exec()
+            if x == QMessageBox.StandardButton.No:
+                self.close()
+        else:
+            self.msg_box.setStandardButtons(QMessageBox.StandardButton.Ok)
+            self.msg_box.setIcon(QMessageBox.Icon.Critical)
+            self.msg_box.setText(error_string)
+            self.msg_box.setWindowTitle("Error")
+            self.msg_box.exec()
+
+# -------- Submit Job Calls --------
+
+    def submit_job(self):
+
+        # Pre-worker UI
+        self.submit_progress.setHidden(False)
+        self.submit_progress_label.setHidden(False)
+        self.submit_button.setHidden(True)
+        self.submit_progress.setMaximum(0)
+
+        # submit job in background thread
+        self.worker_thread = SubmitWorker(window=self)
+        self.worker_thread.update_ui_signal.connect(self.update_submit_progress)
+        self.worker_thread.message_signal.connect(self.after_job_submission)
+        self.worker_thread.start()
+
+    @pyqtSlot(str, str)
+    def update_submit_progress(self, hostname, percent):
+        # Update the UI here. This slot will be executed in the main thread
+        self.submit_progress_label.setText(f"Transferring to {hostname} - {percent}%")
+        self.submit_progress.setMaximum(100)
+        self.submit_progress.setValue(int(percent))
+
+
+class SubmitWorker(QThread):
+    """Worker class called to submit all the jobs to the server and update the UI accordingly"""
+
+    message_signal = pyqtSignal(str)
+    update_ui_signal = pyqtSignal(str, str)
+
+    def __init__(self, window):
+        super().__init__()
+        self.window = window
+
+    def run(self):
+        def create_callback(encoder):
+            encoder_len = encoder.len
+
+            def callback(monitor):
+                percent = f"{monitor.bytes_read / encoder_len * 100:.0f}"
+                self.update_ui_signal.emit(hostname, percent)
+            return callback
+
+        try:
+            hostname = self.window.server_input.currentText()
+            resolution = (self.window.resolution_x_input.text(), self.window.resolution_y_input.text())
+            job_json = {'owner': psutil.Process().username() + '@' + socket.gethostname(),
+                        'engine_name': self.window.engine_type.currentText().lower(),
+                        'engine_version': self.window.engine_version_combo.currentText(),
+                        'args': {'raw': self.window.raw_args.text(),
+                                 'export_format': self.window.file_format_combo.currentText(),
+                                 'resolution': resolution,
+                                 'fps': self.window.fps_input.text(),},
+                        'output_path': self.window.job_name_input.text(),
+                        'start_frame': self.window.start_frame_input.value(),
+                        'end_frame': self.window.end_frame_input.value(),
+                        'priority': self.window.priority_input.currentIndex() + 1,
+                        'notes': self.window.notes_input.toPlainText(),
+                        'enable_split_jobs': self.window.enable_splitjobs.isChecked(),
+                        'split_jobs_same_os': self.window.splitjobs_same_os.isChecked(),
+                        'name': self.window.job_name_input.text()}
+
+            # get the dynamic args
+            for i in range(self.window.engine_options_layout.count()):
+                item = self.window.engine_options_layout.itemAt(i)
+                layout = item.layout()  # get the layout
+                for x in range(layout.count()):
+                    z = layout.itemAt(x)
+                    widget = z.widget()
+                    if isinstance(widget, QComboBox):
+                        job_json['args'][self.window.current_engine_options[i]['name']] = widget.currentText()
+                    elif isinstance(widget, QLineEdit):
+                        job_json['args'][self.window.current_engine_options[i]['name']] = widget.text()
+
+            # determine if any cameras are checked
+            selected_cameras = []
+            if self.window.cameras_list.count() and self.window.cameras_group.isEnabled():
+                for index in range(self.window.cameras_list.count()):
+                    item = self.window.cameras_list.item(index)
+                    if item.checkState() == Qt.CheckState.Checked:
+                        selected_cameras.append(item.text().rsplit('-', 1)[0].strip())  # cleanup to just camera name
+
+            # process cameras into nested format
+            input_path = self.window.scene_file_input.text()
+            if selected_cameras and self.window.cameras_list.count() > 1:
+                children_jobs = []
+                for cam in selected_cameras:
+                    child_job_data = dict()
+                    child_job_data['args'] = dict(job_json['args'])
+                    child_job_data['args']['camera'] = cam
+                    child_job_data['name'] = job_json['name'].replace(' ', '-') + "_" + cam.replace(' ', '')
+                    child_job_data['output_path'] = child_job_data['name']
+                    children_jobs.append(child_job_data)
+                job_json['child_jobs'] = children_jobs
+
+            # presubmission tasks - use local installs
+            engine_class = EngineManager.engine_class_with_name(self.window.engine_type.currentText().lower())
+            latest_engine = EngineManager.get_latest_engine_instance(engine_class)
+            input_path = Path(latest_engine.perform_presubmission_tasks(input_path))
+            # submit
+            err_msg = ""
+            result = self.window.server_proxy.create_job(file_path=input_path, job_data=job_json,
+                                                         callback=create_callback)
+            if not (result and result.ok):
+                err_msg = f"Error posting job to server: {result.text}"
+
+            self.message_signal.emit(err_msg)
+
+        except Exception as e:
+            self.message_signal.emit(str(e))
+
+
+class GetProjectInfoWorker(QThread):
+    """Worker class called to retrieve information about a project file on a background thread and update the UI"""
+
+    message_signal = pyqtSignal()
+    error_signal = pyqtSignal(str)
+
+    def __init__(self, window, project_path):
+        super().__init__()
+        self.window = window
+        self.project_path = project_path
+
+    def run(self):
+        try:
+            # get the engine info and add them all to the ui
+            self.window.installed_engines = self.window.server_proxy.get_engine_names()
+            # select the best engine for the file type
+            self.window.preferred_engine = self.window.server_proxy.get_engine_for_filename(self.project_path)
+
+            # this should be the only time we use a local engine instead of using the proxy besides submitting
+            engine_class = EngineManager.engine_class_for_project_path(self.project_path)
+            engine = EngineManager.get_latest_engine_instance(engine_class)
+            self.window.project_info = engine.get_project_info(self.project_path)
+            self.message_signal.emit()
+        except Exception as e:
+            self.error_signal.emit(str(e))
+
+
+def clear_layout(layout):
+    if layout is not None:
+        # Go through the layout's items in reverse order
+        for i in reversed(range(layout.count())):
+            # Take the item at the current position
+            item = layout.takeAt(i)
+
+            # Check if the item is a widget
+            if item.widget():
+                # Remove the widget and delete it
+                widget_to_remove = item.widget()
+                widget_to_remove.setParent(None)
+                widget_to_remove.deleteLater()
+            elif item.layout():
+                # If the item is a sub-layout, clear its contents recursively
+                clear_layout(item.layout())
+                # Then delete the layout
+                item.layout().deleteLater()
+
+# Run the application
+if __name__ == '__main__':
+    app = QApplication([])
+    window = NewRenderJobForm()
+    app.exec()

src/ui/console_window.py

@@ -1,4 +1,3 @@
-import sys
 import logging
 
 from PyQt6.QtGui import QFont
@@ -16,7 +15,10 @@ class QSignalHandler(logging.Handler, QObject):
 
     def emit(self, record):
         msg = self.format(record)
-        self.new_record.emit(msg)  # Emit signal
+        try:
+            self.new_record.emit(msg)  # Emit signal
+        except RuntimeError:
+            pass
 
 
 class ConsoleWindow(QMainWindow):

src/ui/engine_browser.py

@@ -4,6 +4,7 @@ import subprocess
 import sys
 import threading
 
+from PyQt6.QtCore import QTimer
 from PyQt6.QtWidgets import (
     QMainWindow, QWidget, QVBoxLayout, QPushButton, QTableWidget, QTableWidgetItem, QHBoxLayout, QAbstractItemView,
     QHeaderView, QProgressBar, QLabel, QMessageBox
@@ -11,7 +12,7 @@ from PyQt6.QtWidgets import (
 
 from src.api.server_proxy import RenderServerProxy
 from src.engines.engine_manager import EngineManager
-from src.utilities.misc_helper import is_localhost
+from src.utilities.misc_helper import is_localhost, launch_url
 
 
 class EngineBrowserWindow(QMainWindow):
@@ -28,6 +29,7 @@ class EngineBrowserWindow(QMainWindow):
         self.setGeometry(100, 100, 500, 300)
         self.engine_data = []
         self.initUI()
+        self.init_timer()
 
     def initUI(self):
         # Central widget
@@ -82,15 +84,21 @@ class EngineBrowserWindow(QMainWindow):
 
         self.update_download_status()
 
+    def init_timer(self):
+        # Set up the timer
+        self.timer = QTimer(self)
+        self.timer.timeout.connect(self.update_download_status)
+        self.timer.start(1000)
+
     def update_table(self):
 
         def update_table_worker():
-            raw_server_data = RenderServerProxy(self.hostname).get_renderer_info()
+            raw_server_data = RenderServerProxy(self.hostname).get_engines()
             if not raw_server_data:
                 return
 
             table_data = []  # convert the data into a flat list
-            for engine_name, engine_data in raw_server_data.items():
+            for _, engine_data in raw_server_data.items():
                 table_data.extend(engine_data['versions'])
             self.engine_data = table_data
 
@@ -120,25 +128,23 @@ class EngineBrowserWindow(QMainWindow):
         self.launch_button.setEnabled(is_localhost(self.hostname))
 
     def update_download_status(self):
-        running_tasks = [x for x in EngineManager.download_tasks if x.is_alive()]
+        running_tasks = EngineManager.active_downloads()
         hide_progress = not bool(running_tasks)
         self.progress_bar.setHidden(hide_progress)
         self.progress_label.setHidden(hide_progress)
-
+        # Update the status labels
-        # todo: update progress bar with status
+        if len(running_tasks) == 0:
-        self.progress_label.setText(f"Downloading {len(running_tasks)} engines")
+            new_status = ""
+        elif len(running_tasks) == 1:
+            task = running_tasks[0]
+            new_status = f"Downloading {task.engine.capitalize()} {task.version}..."
+        else:
+            new_status = f"Downloading {len(running_tasks)} engines..."
+        self.progress_label.setText(new_status)
 
     def launch_button_click(self):
         engine_info = self.engine_data[self.table_widget.currentRow()]
-        path = engine_info['path']
+        launch_url(engine_info['path'])
-        if sys.platform.startswith('darwin'):
-            subprocess.run(['open', path])
-        elif sys.platform.startswith('win32'):
-            os.startfile(path)
-        elif sys.platform.startswith('linux'):
-            subprocess.run(['xdg-open', path])
-        else:
-            raise OSError("Unsupported operating system")
 
     def install_button_click(self):
         self.update_download_status()
@@ -152,7 +158,9 @@ class EngineBrowserWindow(QMainWindow):
         if reply is not QMessageBox.StandardButton.Yes:
             return
 
-        result = RenderServerProxy(self.hostname).delete_engine(engine_info['engine'], engine_info['version'])
+        result = RenderServerProxy(self.hostname).delete_engine_download(
+            engine_info['engine'], engine_info['version'], engine_info.get('system_os'), engine_info.get('cpu'),
+        )
         if result.ok:
             self.update_table()
         else:

src/ui/engine_help_window.py

@@ -26,5 +26,5 @@ class EngineHelpViewer(QMainWindow):
         self.fetch_help()
 
     def fetch_help(self):
-        result = requests.get(self.help_path)
+        result = requests.get(self.help_path, timeout=10)
         self.text_edit.setPlainText(result.text)

src/ui/log_window.py

@@ -26,5 +26,5 @@ class LogViewer(QMainWindow):
         self.fetch_logs()
 
     def fetch_logs(self):
-        result = requests.get(self.log_path)
+        result = requests.get(self.log_path, timeout=10)
         self.text_edit.setPlainText(result.text)

src/ui/main_window.py

@@ -1,34 +1,39 @@
 ''' app/ui/main_window.py '''
+import ast
 import datetime
+import io
 import logging
 import os
-import socket
-import subprocess
 import sys
 import threading
 import time
+from typing import List, Dict, Any, Optional
 
+import PIL
+import humanize
 from PIL import Image
-from PyQt6.QtCore import Qt, QByteArray, QBuffer, QIODevice, QThread
+from PyQt6.QtCore import Qt, QByteArray, QBuffer, QIODevice, QThread, pyqtSignal
 from PyQt6.QtGui import QPixmap, QImage, QFont, QIcon
 from PyQt6.QtWidgets import QMainWindow, QWidget, QHBoxLayout, QListWidget, QTableWidget, QAbstractItemView, \
     QTableWidgetItem, QLabel, QVBoxLayout, QHeaderView, QMessageBox, QGroupBox, QPushButton, QListWidgetItem, \
     QFileDialog
 
-from src.api.server_proxy import RenderServerProxy
+from src.api.api_server import API_VERSION
+from src.api.serverproxy_manager import ServerProxyManager
 from src.render_queue import RenderQueue
+from src.ui.add_job_window import NewRenderJobForm
+from src.ui.console_window import ConsoleWindow
+from src.ui.engine_browser import EngineBrowserWindow
+from src.ui.log_window import LogViewer
+from src.ui.widgets.menubar import MenuBar
+from src.ui.widgets.proportional_image_label import ProportionalImageLabel
+from src.ui.widgets.statusbar import StatusBar
+from src.ui.widgets.toolbar import ToolBar
 from src.utilities.misc_helper import get_time_elapsed, resources_dir, is_localhost
+from src.utilities.misc_helper import launch_url
 from src.utilities.status_utils import RenderStatus
 from src.utilities.zeroconf_server import ZeroconfServer
-from .add_job import NewRenderJobForm
+from src.version import APP_NAME
-from .console import ConsoleWindow
-from .engine_browser import EngineBrowserWindow
-from .log_viewer import LogViewer
-from .widgets.menubar import MenuBar
-from .widgets.proportional_image_label import ProportionalImageLabel
-from .widgets.statusbar import StatusBar
-from .widgets.toolbar import ToolBar
-from src.api.serverproxy_manager import ServerProxyManager
 
 logger = logging.getLogger()
 
@@ -48,6 +53,12 @@ class MainWindow(QMainWindow):
         super().__init__()
 
         # Load the queue
+        self.job_list_view: Optional[QTableWidget] = None
+        self.server_info_ram: Optional[str] = None
+        self.server_info_cpu: Optional[str] = None
+        self.server_info_os: Optional[str] = None
+        self.server_info_gpu: Optional[List[Dict[str, Any]]] = None
+        self.server_info_hostname: Optional[str] = None
         self.engine_browser_window = None
         self.server_info_group = None
         self.current_hostname = None
@@ -57,7 +68,7 @@ class MainWindow(QMainWindow):
         self.buffer_handler = None
 
         # Window-Settings
-        self.setWindowTitle("Zordon")
+        self.setWindowTitle(APP_NAME)
         self.setGeometry(100, 100, 900, 800)
         central_widget = QWidget(self)
         self.setCentralWidget(central_widget)
@@ -67,7 +78,7 @@ class MainWindow(QMainWindow):
         # Create a QLabel widget to display the image
         self.image_label = ProportionalImageLabel()
         self.image_label.setMaximumSize(700, 500)
-        self.image_label.setFixedHeight(500)
+        self.image_label.setFixedHeight(300)
         self.image_label.setAlignment(Qt.AlignmentFlag.AlignTop | Qt.AlignmentFlag.AlignHCenter)
         self.load_image_path(os.path.join(resources_dir(), 'Rectangle.png'))
 
@@ -81,15 +92,18 @@ class MainWindow(QMainWindow):
 
         self.setup_ui(main_layout)
 
-        self.create_toolbars()
-
         # Add Widgets to Window
+        # self.custom_menu_bar =
         self.setMenuBar(MenuBar(self))
         self.setStatusBar(StatusBar(self))
 
+        self.create_toolbars()
+
         # start background update
-        self.bg_update_thread = QThread()
+        self.found_servers = []
-        self.bg_update_thread.run = self.__background_update
+        self.job_data = {}
+        self.bg_update_thread = BackgroundUpdater(window=self)
+        self.bg_update_thread.updated_signal.connect(self.update_ui_data)
         self.bg_update_thread.start()
 
         # Setup other windows
@@ -100,7 +114,12 @@ class MainWindow(QMainWindow):
         # Pick default job
         self.job_picked()
 
-    def setup_ui(self, main_layout):
+    def setup_ui(self, main_layout: QVBoxLayout) -> None:
+        """Setup the main user interface layout.
+
+        Args:
+            main_layout: The main layout container for the UI widgets.
+        """
 
         # Servers
         server_list_group = QGroupBox("Available Servers")
@@ -115,6 +134,7 @@ class MainWindow(QMainWindow):
         self.server_info_os = QLabel()
         self.server_info_cpu = QLabel()
         self.server_info_ram = QLabel()
+        self.server_info_gpu = QLabel()
         server_info_engines_button = QPushButton("Render Engines")
         server_info_engines_button.clicked.connect(self.engine_browser)
         server_info_layout = QVBoxLayout()
@@ -122,6 +142,7 @@ class MainWindow(QMainWindow):
         server_info_layout.addWidget(self.server_info_os)
         server_info_layout.addWidget(self.server_info_cpu)
         server_info_layout.addWidget(self.server_info_ram)
+        server_info_layout.addWidget(self.server_info_gpu)
         server_info_layout.addWidget(server_info_engines_button)
         server_info_group.setLayout(server_info_layout)
 
@@ -148,40 +169,41 @@ class MainWindow(QMainWindow):
         self.job_list_view.verticalHeader().setVisible(False)
         self.job_list_view.itemSelectionChanged.connect(self.job_picked)
         self.job_list_view.setEditTriggers(QAbstractItemView.EditTrigger.NoEditTriggers)
-        self.refresh_job_headers()
 
-        # Image Layout
+        # Setup Job Headers
-        image_group = QGroupBox("Job Preview")
+        self.job_list_view.setHorizontalHeaderLabels(["ID", "Name", "Engine", "Priority", "Status",
-        image_layout = QVBoxLayout(image_group)
+                                                      "Time Elapsed", "Frames", "Date Created"])
-        image_layout.setContentsMargins(0, 0, 0, 0)
+        self.job_list_view.setColumnHidden(0, True)
-        image_center_layout = QHBoxLayout()
-        image_center_layout.addWidget(self.image_label)
-        image_layout.addWidget(self.image_label)
-        # image_layout.addLayout(image_center_layout)
 
-        # Job Layout
+        self.job_list_view.horizontalHeader().setSectionResizeMode(1, QHeaderView.ResizeMode.Stretch)
-        job_list_group = QGroupBox("Render Jobs")
+        self.job_list_view.horizontalHeader().setSectionResizeMode(2, QHeaderView.ResizeMode.ResizeToContents)
+        self.job_list_view.horizontalHeader().setSectionResizeMode(3, QHeaderView.ResizeMode.ResizeToContents)
+        self.job_list_view.horizontalHeader().setSectionResizeMode(4, QHeaderView.ResizeMode.ResizeToContents)
+        self.job_list_view.horizontalHeader().setSectionResizeMode(5, QHeaderView.ResizeMode.ResizeToContents)
+        self.job_list_view.horizontalHeader().setSectionResizeMode(6, QHeaderView.ResizeMode.ResizeToContents)
+        self.job_list_view.horizontalHeader().setSectionResizeMode(7, QHeaderView.ResizeMode.ResizeToContents)
+
+        # Job List Layout
+        job_list_group = QGroupBox("Job Preview")
         job_list_layout = QVBoxLayout(job_list_group)
         job_list_layout.setContentsMargins(0, 0, 0, 0)
-        image_layout.addWidget(self.job_list_view, stretch=True)
+        job_list_layout.addWidget(self.image_label)
-        image_layout.addLayout(job_list_layout)
+        job_list_layout.addWidget(self.job_list_view, stretch=True)
 
         # Add them all to the window
         main_layout.addLayout(info_layout)
 
         right_layout = QVBoxLayout()
         right_layout.setContentsMargins(0, 0, 0, 0)
-        right_layout.addWidget(image_group)
+        right_layout.addWidget(job_list_group)
-        # right_layout.addWidget(job_list_group)
         main_layout.addLayout(right_layout)
 
-    def __background_update(self):
-        while True:
-            self.update_servers()
-            self.fetch_jobs()
-            time.sleep(0.5)
-
     def closeEvent(self, event):
+        """Handle window close event with job running confirmation.
+
+        Args:
+            event: The close event triggered by user.
+        """
         running_jobs = len(RenderQueue.running_jobs())
         if running_jobs:
             reply = QMessageBox.question(self, "Running Jobs",
@@ -194,7 +216,12 @@ class MainWindow(QMainWindow):
             else:
                 event.ignore()
 
-# -- Server Code -- #
+    # -- Server Code -- #
+
+    def refresh_job_list(self):
+        """Refresh the job list display."""
+        self.job_list_view.clearContents()
+        self.bg_update_thread.needs_update = True
 
     @property
     def current_server_proxy(self):
@@ -202,91 +229,125 @@ class MainWindow(QMainWindow):
 
     def server_picked(self):
         """Update the UI elements relevant to the server selection."""
-        try:
+        current_item = self.server_list_view.currentItem()
-            # Retrieve the new hostname selected by the user
+        if current_item is None:
-            new_hostname = self.server_list_view.currentItem().text()
+            return
 
-            # Check if the hostname has changed to avoid unnecessary updates
+        new_hostname = current_item.text()
-            if new_hostname != self.current_hostname:
+        if new_hostname == self.current_hostname:
-                # Update the current hostname and clear the job list
+            return
-                self.current_hostname = new_hostname
-                self.job_list_view.setRowCount(0)
-                self.fetch_jobs(clear_table=True)
 
-                # Select the first row if there are jobs listed
+        self.current_hostname = new_hostname
-                if self.job_list_view.rowCount():
+        self.job_list_view.setRowCount(0)
-                    self.job_list_view.selectRow(0)
+        self.refresh_job_list()
 
-                # Update server information display
+        if self.job_list_view.rowCount():
-                self.update_server_info_display(new_hostname)
+            self.job_list_view.selectRow(0)
 
-        except AttributeError:
+        self.update_server_info_display(new_hostname)
-            # Handle cases where the server list view might not be properly initialized
-            pass
 
     def update_server_info_display(self, hostname):
         """Updates the server information section of the UI."""
-        self.server_info_hostname.setText(hostname or "unknown")
+        self.server_info_hostname.setText(f"Name: {hostname}")
         server_info = ZeroconfServer.get_hostname_properties(hostname)
 
         # Use the get method with defaults to avoid KeyError
         os_info = f"OS: {server_info.get('system_os', 'Unknown')} {server_info.get('system_os_version', '')}"
-        cpu_info = f"CPU: {server_info.get('system_cpu', 'Unknown')} - {server_info.get('system_cpu_cores', 'Unknown')} cores"
+        cleaned_cpu_name = server_info.get('system_cpu_brand', 'Unknown').replace(' CPU','').replace('(TM)','').replace('(R)', '')
+        cpu_info = f"CPU: {cleaned_cpu_name} ({server_info.get('system_cpu_cores', 'Unknown')} cores)"
+        memory_info = f"RAM: {server_info.get('system_memory', 'Unknown')} GB"
+
+        # Get and format GPU info
+        try:
+            gpu_list = ast.literal_eval(server_info.get('gpu_info', []))
+            
+            # Format all GPUs
+            gpu_info_parts = []
+            for gpu in gpu_list:
+                gpu_name = gpu.get('name', 'Unknown').replace('(TM)','').replace('(R)', '')
+                gpu_memory = gpu.get('memory', 'Unknown')
+                
+                # Add " GB" suffix if memory is a number
+                if isinstance(gpu_memory, (int, float)) or (isinstance(gpu_memory, str) and gpu_memory.isdigit()):
+                    gpu_memory_str = f"{gpu_memory} GB"
+                else:
+                    gpu_memory_str = str(gpu_memory)
+                
+                gpu_info_parts.append(f"{gpu_name} ({gpu_memory_str})")
+            
+            gpu_info = f"GPU: {', '.join(gpu_info_parts)}" if gpu_info_parts else "GPU: Unknown"
+        except Exception as e:
+            logger.error(f"Error parsing GPU info: {e}")
+            gpu_info = "GPU: Unknown"
 
         self.server_info_os.setText(os_info.strip())
         self.server_info_cpu.setText(cpu_info)
+        self.server_info_ram.setText(memory_info)
+        self.server_info_gpu.setText(gpu_info)
 
-    def fetch_jobs(self, clear_table=False):
+    def update_ui_data(self):
+        """Update UI data with current server and job information."""
+        self.update_servers()
 
         if not self.current_server_proxy:
             return
 
-        if clear_table:
+        server_job_data = self.job_data.get(self.current_server_proxy.hostname)
-            self.job_list_view.clear()
+        if server_job_data is None:
-            self.refresh_job_headers()
+            return
 
-        job_fetch = self.current_server_proxy.get_all_jobs(ignore_token=clear_table)
+        num_jobs = len(server_job_data)
-        if job_fetch:
+        self.job_list_view.setRowCount(num_jobs)
-            num_jobs = len(job_fetch)
-            self.job_list_view.setRowCount(num_jobs)
 
-            for row, job in enumerate(job_fetch):
+        for row, job in enumerate(server_job_data):
 
-                display_status = job['status'] if job['status'] != RenderStatus.RUNNING.value else \
+            display_status = job['status'] if job['status'] != RenderStatus.RUNNING.value else \
-                    ('%.0f%%' % (job['percent_complete'] * 100))  # if running, show percent, otherwise just show status
+                ('%.0f%%' % (job['percent_complete'] * 100))  # if running, show percent, otherwise just show status
-                tags = (job['status'],)
+            tags = (job['status'],)
-                start_time = datetime.datetime.fromisoformat(job['start_time']) if job['start_time'] else None
+            start_time = datetime.datetime.fromisoformat(job['start_time']) if job['start_time'] else None
-                end_time = datetime.datetime.fromisoformat(job['end_time']) if job['end_time'] else None
+            end_time = datetime.datetime.fromisoformat(job['end_time']) if job['end_time'] else None
 
-                time_elapsed = "" if (job['status'] != RenderStatus.RUNNING.value and not end_time) else \
+            time_elapsed = "" if (job['status'] != RenderStatus.RUNNING.value and not end_time) else \
-                    get_time_elapsed(start_time, end_time)
+                get_time_elapsed(start_time, end_time)
 
-                name = job.get('name') or os.path.basename(job.get('input_path', ''))
+            name = job.get('name') or os.path.basename(job.get('input_path', ''))
-                renderer = f"{job.get('renderer', '')}-{job.get('renderer_version')}"
+            engine_name = f"{job.get('engine', '')}-{job.get('engine_version')}"
-                priority = str(job.get('priority', ''))
+            priority = str(job.get('priority', ''))
-                total_frames = str(job.get('total_frames', ''))
+            total_frames = str(job.get('total_frames', ''))
+            converted_time = datetime.datetime.fromisoformat(job['date_created'])
+            humanized_time = humanize.naturaltime(converted_time)
 
-                items = [QTableWidgetItem(job['id']), QTableWidgetItem(name), QTableWidgetItem(renderer),
+            items = [QTableWidgetItem(job['id']), QTableWidgetItem(name), QTableWidgetItem(engine_name),
-                         QTableWidgetItem(priority), QTableWidgetItem(display_status), QTableWidgetItem(time_elapsed),
+                     QTableWidgetItem(priority), QTableWidgetItem(display_status), QTableWidgetItem(time_elapsed),
-                         QTableWidgetItem(total_frames), QTableWidgetItem(job['date_created'])]
+                     QTableWidgetItem(total_frames), QTableWidgetItem(humanized_time)]
 
-                for col, item in enumerate(items):
+            for col, item in enumerate(items):
-                    self.job_list_view.setItem(row, col, item)
+                self.job_list_view.setItem(row, col, item)
 
-# -- Job Code -- #
+    # -- Job Code -- #
     def job_picked(self):
 
         def fetch_preview(job_id):
             try:
+                default_image_path = "error.png"
                 before_fetch_hostname = self.current_server_proxy.hostname
-                response = self.current_server_proxy.request(f'job/{job_id}/thumbnail?size=big')
+
+                response = self.current_server_proxy.request(f'jobs/{job_id}/thumbnail?size=big')
                 if response.ok:
-                    import io
+                    try:
-                    image_data = response.content
+                        with io.BytesIO(response.content) as image_data_stream:
-                    image = Image.open(io.BytesIO(image_data))
+                            image = Image.open(image_data_stream)
-                    if self.current_server_proxy.hostname == before_fetch_hostname and job_id == \
+                            if self.current_server_proxy.hostname == before_fetch_hostname and job_id == \
-                            self.selected_job_ids()[0]:
+                                    self.selected_job_ids()[0]:
-                        self.load_image_data(image)
+                                self.load_image_data(image)
+                                return
+                    except PIL.UnidentifiedImageError:
+                        default_image_path = response.text
+                else:
+                    default_image_path = default_image_path or response.text
+
+                self.load_image_path(os.path.join(resources_dir(), default_image_path))
+
             except ConnectionError as e:
                 logger.error(f"Connection error fetching image: {e}")
             except Exception as e:
@@ -304,7 +365,7 @@ class MainWindow(QMainWindow):
             current_status = self.job_list_view.item(selected_row.row(), 4).text()
 
             # show / hide the stop button
-            show_stop_button = current_status.lower() == 'running'
+            show_stop_button = "%" in current_status
             self.topbar.actions_call['Stop Job'].setEnabled(show_stop_button)
             self.topbar.actions_call['Stop Job'].setVisible(show_stop_button)
             self.topbar.actions_call['Delete Job'].setEnabled(not show_stop_button)
@@ -329,79 +390,86 @@ class MainWindow(QMainWindow):
             self.topbar.actions_call['Open Files'].setVisible(False)
 
     def selected_job_ids(self):
-        selected_rows = self.job_list_view.selectionModel().selectedRows()
+        """Get list of selected job IDs from the job list.
-        job_ids = []
-        for selected_row in selected_rows:
-            id_item = self.job_list_view.item(selected_row.row(), 0)
-            job_ids.append(id_item.text())
-        return job_ids
 
-    def refresh_job_headers(self):
+        Returns:
-        self.job_list_view.setHorizontalHeaderLabels(["ID", "Name", "Renderer", "Priority", "Status",
+            List[str]: List of selected job ID strings.
-                                                      "Time Elapsed", "Frames", "Date Created"])
+        """
-        self.job_list_view.setColumnHidden(0, True)
+        try:
+            selected_rows = self.job_list_view.selectionModel().selectedRows()
+            job_ids = []
+            for selected_row in selected_rows:
+                id_item = self.job_list_view.item(selected_row.row(), 0)
+                job_ids.append(id_item.text())
+            return job_ids
+        except AttributeError as e:
+            logger.error(f"AttributeError in selected_job_ids: {e}")
+            return []
 
-        self.job_list_view.horizontalHeader().setSectionResizeMode(1, QHeaderView.ResizeMode.Stretch)
-        self.job_list_view.horizontalHeader().setSectionResizeMode(2, QHeaderView.ResizeMode.ResizeToContents)
-        self.job_list_view.horizontalHeader().setSectionResizeMode(3, QHeaderView.ResizeMode.ResizeToContents)
-        self.job_list_view.horizontalHeader().setSectionResizeMode(4, QHeaderView.ResizeMode.ResizeToContents)
-        self.job_list_view.horizontalHeader().setSectionResizeMode(5, QHeaderView.ResizeMode.ResizeToContents)
-        self.job_list_view.horizontalHeader().setSectionResizeMode(6, QHeaderView.ResizeMode.ResizeToContents)
-        self.job_list_view.horizontalHeader().setSectionResizeMode(7, QHeaderView.ResizeMode.ResizeToContents)
 
-# -- Image Code -- #
+    # -- Image Code -- #
 
     def load_image_path(self, image_path):
-        # Load and set the image using QPixmap
+        """Load and display an image from file path.
-        pixmap = QPixmap(image_path)
+
-        if not pixmap:
+        Args:
-            logger.error("Error loading image")
+            image_path: Path to the image file to load.
-            return
+        """
-        self.image_label.setPixmap(pixmap)
+        # Load and set image using QPixmap
+        try:
+            pixmap = QPixmap(image_path)
+            if not pixmap:
+                logger.error("Error loading image")
+                return
+            self.image_label.setPixmap(pixmap)
+        except Exception as e:
+            logger.error(f"Error loading image path: {e}")
 
     def load_image_data(self, pillow_image):
-        # Convert the Pillow Image to a QByteArray (byte buffer)
+        try:
-        byte_array = QByteArray()
+            # Convert the Pillow Image to a QByteArray (byte buffer)
-        buffer = QBuffer(byte_array)
+            byte_array = QByteArray()
-        buffer.open(QIODevice.OpenModeFlag.WriteOnly)
+            buffer = QBuffer(byte_array)
-        pillow_image.save(buffer, "PNG")
+            buffer.open(QIODevice.OpenModeFlag.WriteOnly)
-        buffer.close()
+            pillow_image.save(buffer, "PNG")
+            buffer.close()
 
-        # Create a QImage from the QByteArray
+            # Create a QImage from the QByteArray
-        image = QImage.fromData(byte_array)
+            image = QImage.fromData(byte_array)
 
-        # Create a QPixmap from the QImage
+            # Create a QPixmap from the QImage
-        pixmap = QPixmap.fromImage(image)
+            pixmap = QPixmap.fromImage(image)
 
-        if not pixmap:
+            if not pixmap:
-            logger.error("Error loading image")
+                logger.error("Error loading image")
-            return
+                return
-        self.image_label.setPixmap(pixmap)
+            self.image_label.setPixmap(pixmap)
+        except Exception as e:
+            logger.error(f"Error loading image data: {e}")
 
     def update_servers(self):
-        found_servers = list(set(ZeroconfServer.found_hostnames() + self.added_hostnames))
         # Always make sure local hostname is first
-        if found_servers and not is_localhost(found_servers[0]):
+        if self.found_servers and not is_localhost(self.found_servers[0]):
-            for hostname in found_servers:
+            for hostname in self.found_servers:
                 if is_localhost(hostname):
-                    found_servers.remove(hostname)
+                    self.found_servers.remove(hostname)
-                    found_servers.insert(0, hostname)
+                    self.found_servers.insert(0, hostname)
                     break
 
         old_count = self.server_list_view.count()
 
         # Update proxys
-        for hostname in found_servers:
+        for hostname in self.found_servers:
             ServerProxyManager.get_proxy_for_hostname(hostname)  # setup background updates
 
         # Add in all the missing servers
         current_server_list = []
         for i in range(self.server_list_view.count()):
             current_server_list.append(self.server_list_view.item(i).text())
-        for hostname in found_servers:
+        for hostname in self.found_servers:
             if hostname not in current_server_list:
                 properties = ZeroconfServer.get_hostname_properties(hostname)
-                image_path = os.path.join(resources_dir(), 'icons', f"{properties.get('system_os', 'Monitor')}.png")
+                image_path = os.path.join(resources_dir(), f"{properties.get('system_os', 'Monitor')}.png")
                 list_widget = QListWidgetItem(QIcon(image_path), hostname)
                 self.server_list_view.addItem(list_widget)
 
@@ -409,7 +477,7 @@ class MainWindow(QMainWindow):
         servers_to_remove = []
         for i in range(self.server_list_view.count()):
             name = self.server_list_view.item(i).text()
-            if name not in found_servers:
+            if name not in self.found_servers:
                 servers_to_remove.append(name)
 
         # remove any servers that shouldn't be shown any longer
@@ -424,6 +492,9 @@ class MainWindow(QMainWindow):
         if not old_count and self.server_list_view.count():
             self.server_list_view.setCurrentRow(0)
             self.server_picked()
+        elif self.server_list_view.count() and self.server_list_view.currentItem() is None:
+            self.server_list_view.setCurrentRow(0)
+            self.server_picked()
 
     def create_toolbars(self) -> None:
         """
@@ -438,26 +509,25 @@ class MainWindow(QMainWindow):
 
         # Top Toolbar Buttons
         self.topbar.add_button(
-            "New Job", f"{resources_directory}/icons/AddProduct.png", self.new_job)
+            "Settings", f"{resources_directory}/Gear.png", self.menuBar().show_settings)
         self.topbar.add_button(
-            "Engines", f"{resources_directory}/icons/SoftwareInstaller.png", self.engine_browser)
+            "Console", f"{resources_directory}/Console.png", self.open_console_window)
-        self.topbar.add_button(
-            "Console", f"{resources_directory}/icons/Console.png", self.open_console_window)
         self.topbar.add_separator()
         self.topbar.add_button(
-            "Stop Job", f"{resources_directory}/icons/StopSign.png", self.stop_job)
+            "Stop Job", f"{resources_directory}/StopSign.png", self.stop_job)
         self.topbar.add_button(
-            "Delete Job", f"{resources_directory}/icons/Trash.png", self.delete_job)
+            "Delete Job", f"{resources_directory}/Trash.png", self.delete_job)
         self.topbar.add_button(
-            "Render Log", f"{resources_directory}/icons/Document.png", self.job_logs)
+            "Render Log", f"{resources_directory}/Document.png", self.job_logs)
         self.topbar.add_button(
-            "Download", f"{resources_directory}/icons/Download.png", self.download_files)
+            "Download", f"{resources_directory}/Download.png", self.download_files)
         self.topbar.add_button(
-            "Open Files", f"{resources_directory}/icons/SearchFolder.png", self.open_files)
+            "Open Files", f"{resources_directory}/SearchFolder.png", self.open_files)
-
+        self.topbar.add_button(
+            "New Job", f"{resources_directory}/AddProduct.png", self.new_job)
         self.addToolBar(Qt.ToolBarArea.TopToolBarArea, self.topbar)
 
-# -- Toolbar Buttons -- #
+        # -- Toolbar Buttons -- #
 
     def open_console_window(self) -> None:
         """
@@ -472,52 +542,58 @@ class MainWindow(QMainWindow):
         self.engine_browser_window.show()
 
     def job_logs(self) -> None:
-        """
+        """Open log viewer for selected job.
-        Event handler for the "Logs" button.
+
+        Opens a log viewer window showing the logs for the currently selected job.
         """
         selected_job_ids = self.selected_job_ids()
         if selected_job_ids:
-            url = f'http://{self.current_server_proxy.hostname}:{self.current_server_proxy.port}/api/job/{selected_job_ids[0]}/logs'
+            url = (f'http://{self.current_server_proxy.hostname}:{self.current_server_proxy.port}'
+                   f'/api/jobs/{selected_job_ids[0]}/logs')
             self.log_viewer_window = LogViewer(url)
             self.log_viewer_window.show()
 
     def stop_job(self, event):
-        """
+        """Stop selected render jobs with user confirmation.
-        Event handler for the "Exit" button. Closes the application.
+
+        Args:
+            event: The button click event.
         """
         job_ids = self.selected_job_ids()
         if not job_ids:
             return
 
         if len(job_ids) == 1:
-            job = next((job for job in self.current_server_proxy.get_all_jobs() if job.get('id') == job_ids[0]), None)
+            job = next((job for job in self.current_server_proxy.get_jobs() if job.get('id') == job_ids[0]), None)
             if job:
                 display_name = job.get('name', os.path.basename(job.get('input_path', '')))
-                message = f"Are you sure you want to delete the job:\n{display_name}?"
+                message = f"Are you sure you want to stop job: {display_name}?"
             else:
                 return  # Job not found, handle this case as needed
         else:
-            message = f"Are you sure you want to delete these {len(job_ids)} jobs?"
+            message = f"Are you sure you want to stop these {len(job_ids)} jobs?"
 
         # Display the message box and check the response in one go
-        msg_box = QMessageBox(QMessageBox.Icon.Warning, "Delete Job", message,
+        msg_box = QMessageBox(QMessageBox.Icon.Warning, "Stop Job", message,
                               QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No, self)
 
         if msg_box.exec() == QMessageBox.StandardButton.Yes:
             for job_id in job_ids:
                 self.current_server_proxy.cancel_job(job_id, confirm=True)
-            self.fetch_jobs(clear_table=True)
+            self.refresh_job_list()
 
     def delete_job(self, event):
-        """
+        """Delete selected render jobs with user confirmation.
-        Event handler for the Delete Job button
+
+        Args:
+            event: The button click event.
         """
         job_ids = self.selected_job_ids()
         if not job_ids:
             return
 
         if len(job_ids) == 1:
-            job = next((job for job in self.current_server_proxy.get_all_jobs() if job.get('id') == job_ids[0]), None)
+            job = next((job for job in self.current_server_proxy.get_jobs() if job.get('id') == job_ids[0]), None)
             if job:
                 display_name = job.get('name', os.path.basename(job.get('input_path', '')))
                 message = f"Are you sure you want to delete the job:\n{display_name}?"
@@ -533,10 +609,18 @@ class MainWindow(QMainWindow):
         if msg_box.exec() == QMessageBox.StandardButton.Yes:
             for job_id in job_ids:
                 self.current_server_proxy.delete_job(job_id, confirm=True)
-            self.fetch_jobs(clear_table=True)
+            self.refresh_job_list()
 
     def download_files(self, event):
-        pass
+
+        job_ids = self.selected_job_ids()
+        if not job_ids:
+            return
+
+        import webbrowser
+        download_url = (f'http://{self.current_server_proxy.hostname}:{self.current_server_proxy.port}'
+                        f'/api/jobs/{job_ids[0]}/download_all')
+        webbrowser.open(download_url)
 
     def open_files(self, event):
         job_ids = self.selected_job_ids()
@@ -544,17 +628,9 @@ class MainWindow(QMainWindow):
             return
 
         for job_id in job_ids:
-            job_info = self.current_server_proxy.get_job_info(job_id)
+            job_info = self.current_server_proxy.get_job(job_id)
             path = os.path.dirname(job_info['output_path'])
-
+            launch_url(path)
-            if sys.platform.startswith('darwin'):
-                subprocess.run(['open', path])
-            elif sys.platform.startswith('win32'):
-                os.startfile(path)
-            elif sys.platform.startswith('linux'):
-                subprocess.run(['xdg-open', path])
-            else:
-                raise OSError("Unsupported operating system")
 
     def new_job(self) -> None:
 
@@ -562,3 +638,56 @@ class MainWindow(QMainWindow):
         if file_name:
             self.new_job_window = NewRenderJobForm(file_name)
             self.new_job_window.show()
+
+
+class BackgroundUpdater(QThread):
+    """Worker class to fetch job and server information and update the UI"""
+
+    updated_signal = pyqtSignal()
+    error_signal = pyqtSignal(str)
+
+    def __init__(self, window):
+        super().__init__()
+        self.window = window
+        self.needs_update = True
+
+    def run(self):
+        """Main background thread execution loop.
+
+        Continuously fetches server and job data, updating the main UI
+        every second or when updates are needed.
+        """
+        try:
+            last_run = 0
+            while True:
+                now = time.monotonic()
+                if now - last_run >= 1.0 or self.needs_update:
+                    self.window.found_servers = list(set(ZeroconfServer.found_hostnames() + self.window.added_hostnames))
+                    self.window.found_servers = [x for x in self.window.found_servers if
+                                                 ZeroconfServer.get_hostname_properties(x)['api_version'] == API_VERSION]
+                    if self.window.current_server_proxy:
+                        self.window.job_data[self.window.current_server_proxy.hostname] = \
+                            self.window.current_server_proxy.get_jobs(ignore_token=False)
+                    self.needs_update = False
+                    self.updated_signal.emit()
+                time.sleep(0.05)
+        except Exception as e:
+            print(f"ERROR: {e}")
+            self.error_signal.emit(str(e))
+
+if __name__ == "__main__":
+    # lazy load GUI frameworks
+    from PyQt6.QtWidgets import QApplication
+
+    # load application
+    # QtCore.QCoreApplication.setAttribute(QtCore.Qt.ApplicationAttribute.AA_MacDontSwapCtrlAndMeta)
+    app: QApplication = QApplication(sys.argv)
+
+    # configure main main_window
+    main_window = MainWindow()
+    # main_window.buffer_handler = buffer_handler
+    app.setActiveWindow(main_window)
+
+    main_window.show()
+
+    sys.exit(app.exec())

src/ui/settings_window.py

@@ -0,0 +1,552 @@
+import os
+import socket
+from datetime import datetime
+from pathlib import Path
+
+import humanize
+from PyQt6 import QtCore
+from PyQt6.QtCore import Qt, QSettings, pyqtSignal as Signal, QThread, pyqtSignal, QTimer
+from PyQt6.QtGui import QIcon
+from PyQt6.QtWidgets import QApplication, QMainWindow, QListWidget, QListWidgetItem, QStackedWidget, QVBoxLayout, \
+    QWidget, QLabel, QCheckBox, QLineEdit, \
+    QPushButton, QHBoxLayout, QGroupBox, QTableWidget, QAbstractItemView, QTableWidgetItem, QHeaderView, \
+    QMessageBox, QProgressBar
+
+from src.api.server_proxy import RenderServerProxy
+from src.engines.engine_manager import EngineManager
+from src.utilities.config import Config
+from src.utilities.misc_helper import launch_url
+from src.version import APP_AUTHOR, APP_NAME
+
+settings = QSettings(APP_AUTHOR, APP_NAME)
+
+class GetEngineInfoWorker(QThread):
+    """
+    The GetEngineInfoWorker class fetches engine information from a server in a background thread.
+
+    Attributes:
+        done: A signal emitted when the engine information is retrieved.
+
+    Methods:
+        run(self): Fetches engine information from the server.
+    """
+    done = pyqtSignal(object)  # emits the result when finished
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.parent = parent
+
+    def run(self):
+        data = RenderServerProxy(socket.gethostname()).get_engines()
+        self.done.emit(data)
+
+class SettingsWindow(QMainWindow):
+    """
+    The SettingsWindow class provides a user interface for managing engine settings.
+    """
+
+    def __init__(self):
+        super().__init__()
+
+        self.engine_download_progress_bar = None
+        self.engines_last_update_label = None
+        self.check_for_engine_updates_checkbox = None
+        self.delete_engine_button = None
+        self.launch_engine_button = None
+        self.show_password_button = None
+        self.network_password_line = None
+        self.enable_network_password_checkbox = None
+        self.check_for_new_engines_button = None
+
+        if not EngineManager.engines_path:  # fix issue where sometimes path was not set
+            EngineManager.engines_path = Path(Config.upload_folder).expanduser() / "engines"
+
+        self.installed_engines_table = None
+
+        self.setWindowTitle("Settings")
+
+        # Create the main layout
+        main_layout = QVBoxLayout()
+
+        # Create the sidebar (QListWidget) for navigation
+        self.sidebar = QListWidget()
+        self.sidebar.setFixedWidth(150)
+
+        # Set the icon size
+        self.sidebar.setIconSize(QtCore.QSize(32, 32))  # Increase the icon size to 32x32 pixels
+
+        # Adjust the font size for the sidebar items
+        font = self.sidebar.font()
+        font.setPointSize(12)  # Increase the font size
+        self.sidebar.setFont(font)
+
+        # Add items with icons to the sidebar
+        resources_dir = os.path.join(Path(__file__).resolve().parent.parent.parent, 'resources')
+        self.add_sidebar_item("General", os.path.join(resources_dir, "Gear.png"))
+        self.add_sidebar_item("Server", os.path.join(resources_dir, "Server.png"))
+        self.add_sidebar_item("Engines", os.path.join(resources_dir, "Blender.png"))
+        self.sidebar.setCurrentRow(0)
+
+        # Create the stacked widget to hold different settings pages
+        self.stacked_widget = QStackedWidget()
+
+        # Create pages for each section
+        general_page = self.create_general_page()
+        network_page = self.create_network_page()
+        engines_page = self.create_engines_page()
+
+        # Add pages to the stacked widget
+        self.stacked_widget.addWidget(general_page)
+        self.stacked_widget.addWidget(network_page)
+        self.stacked_widget.addWidget(engines_page)
+
+        # Connect the sidebar to the stacked widget
+        self.sidebar.currentRowChanged.connect(self.stacked_widget.setCurrentIndex)
+
+        # Create a horizontal layout to hold the sidebar and stacked widget
+        content_layout = QHBoxLayout()
+        content_layout.addWidget(self.sidebar)
+        content_layout.addWidget(self.stacked_widget)
+
+        # Add the content layout to the main layout
+        main_layout.addLayout(content_layout)
+
+        # Add the "OK" button at the bottom
+        ok_button = QPushButton("OK")
+        ok_button.clicked.connect(self.close)
+        ok_button.setFixedWidth(80)
+        ok_button.setDefault(True)
+        main_layout.addWidget(ok_button, alignment=Qt.AlignmentFlag.AlignRight)
+
+        # Create a central widget and set the layout
+        central_widget = QWidget()
+        central_widget.setLayout(main_layout)
+        self.setCentralWidget(central_widget)
+
+        self.setMinimumSize(700, 400)
+
+        # timers for background download UI updates
+        self.timer = QTimer(self)
+        self.timer.timeout.connect(self.update_engine_download_status)
+
+    def add_sidebar_item(self, name, icon_path):
+        """Add an item with an icon to the sidebar."""
+        item = QListWidgetItem(QIcon(icon_path), name)
+        self.sidebar.addItem(item)
+
+    def create_general_page(self):
+        """Create the General settings page."""
+        page = QWidget()
+        layout = QVBoxLayout()
+
+        # Startup Settings Group
+        startup_group = QGroupBox("Startup Settings")
+        startup_layout = QVBoxLayout()
+        # startup_layout.addWidget(QCheckBox("Start application on system startup"))
+        check_for_updates_checkbox = QCheckBox("Check for updates automatically")
+        check_for_updates_checkbox.setChecked(settings.value("auto_check_for_updates", True, type=bool))
+        check_for_updates_checkbox.stateChanged.connect(lambda state: settings.setValue("auto_check_for_updates", bool(state)))
+        startup_layout.addWidget(check_for_updates_checkbox)
+        startup_group.setLayout(startup_layout)
+
+        # Local Files Group
+        data_path = Path(Config.upload_folder).expanduser()
+        path_size = sum(f.stat().st_size for f in Path(data_path).rglob('*') if f.is_file())
+        database_group = QGroupBox("Local Files")
+        database_layout = QVBoxLayout()
+        database_layout.addWidget(QLabel(f"Local Directory: {data_path}"))
+        database_layout.addWidget(QLabel(f"Size: {humanize.naturalsize(path_size, binary=True)}"))
+        open_database_path_button = QPushButton("Open Directory")
+        open_database_path_button.clicked.connect(lambda: launch_url(data_path))
+        open_database_path_button.setFixedWidth(200)
+        database_layout.addWidget(open_database_path_button)
+        database_group.setLayout(database_layout)
+
+
+        # Render Settings Group
+        render_settings_group = QGroupBox("Render Engine Settings")
+        render_settings_layout = QVBoxLayout()
+        render_settings_layout.addWidget(QLabel("Restrict to render nodes with same:"))
+        require_same_engine_checkbox = QCheckBox("Renderer Version")
+        require_same_engine_checkbox.setChecked(settings.value("render_require_same_engine_version", False, type=bool))
+        require_same_engine_checkbox.stateChanged.connect(lambda state: settings.setValue("render_require_same_engine_version", bool(state)))
+        render_settings_layout.addWidget(require_same_engine_checkbox)
+        require_same_cpu_checkbox = QCheckBox("CPU Architecture")
+        require_same_cpu_checkbox.setChecked(settings.value("render_require_same_cpu_type", False, type=bool))
+        require_same_cpu_checkbox.stateChanged.connect(lambda state: settings.setValue("render_require_same_cpu_type", bool(state)))
+        render_settings_layout.addWidget(require_same_cpu_checkbox)
+        require_same_os_checkbox = QCheckBox("Operating System")
+        require_same_os_checkbox.setChecked(settings.value("render_require_same_os", False, type=bool))
+        require_same_os_checkbox.stateChanged.connect(lambda state: settings.setValue("render_require_same_os", bool(state)))
+        render_settings_layout.addWidget(require_same_os_checkbox)
+        render_settings_group.setLayout(render_settings_layout)
+
+        layout.addWidget(startup_group)
+        layout.addWidget(database_group)
+        layout.addWidget(render_settings_group)
+
+        layout.addStretch()  # Add a stretch to push content to the top
+        page.setLayout(layout)
+        return page
+
+    def create_network_page(self):
+        """Create the Network settings page."""
+        page = QWidget()
+        layout = QVBoxLayout()
+
+        # Sharing Settings Group
+        sharing_group = QGroupBox("Sharing Settings")
+        sharing_layout = QVBoxLayout()
+
+        enable_sharing_checkbox = QCheckBox("Enable other computers on the network to render to this machine")
+        enable_sharing_checkbox.setChecked(settings.value("enable_network_sharing", False, type=bool))
+        enable_sharing_checkbox.stateChanged.connect(self.toggle_render_sharing)
+        sharing_layout.addWidget(enable_sharing_checkbox)
+
+        password_enabled = (settings.value("enable_network_sharing", False, type=bool) and
+                            settings.value("enable_network_password", False, type=bool))
+
+        password_layout = QHBoxLayout()
+        password_layout.setContentsMargins(0, 0, 0, 0)
+        self.enable_network_password_checkbox = QCheckBox("Enable network password:")
+        self.enable_network_password_checkbox.setChecked(settings.value("enable_network_password", False, type=bool))
+        self.enable_network_password_checkbox.stateChanged.connect(self.enable_network_password_changed)
+        self.enable_network_password_checkbox.setEnabled(settings.value("enable_network_sharing", False, type=bool))
+        sharing_layout.addWidget(self.enable_network_password_checkbox)
+        self.network_password_line = QLineEdit()
+        self.network_password_line.setPlaceholderText("Enter a password")
+        self.network_password_line.setEchoMode(QLineEdit.EchoMode.Password)
+        self.network_password_line.setEnabled(password_enabled)
+        password_layout.addWidget(self.network_password_line)
+        self.show_password_button = QPushButton("Show")
+        self.show_password_button.setEnabled(password_enabled)
+        self.show_password_button.clicked.connect(self.show_password_button_pressed)
+        password_layout.addWidget(self.show_password_button)
+        sharing_layout.addLayout(password_layout)
+
+        sharing_group.setLayout(sharing_layout)
+
+        layout.addWidget(sharing_group)
+
+        layout.addStretch()  # Add a stretch to push content to the top
+        page.setLayout(layout)
+        return page
+
+    def toggle_render_sharing(self, enable_sharing):
+        settings.setValue("enable_network_sharing", enable_sharing)
+        self.enable_network_password_checkbox.setEnabled(enable_sharing)
+        enable_password = enable_sharing and settings.value("enable_network_password", False, type=bool)
+        self.network_password_line.setEnabled(enable_password)
+        self.show_password_button.setEnabled(enable_password)
+
+    def enable_network_password_changed(self, new_value):
+        settings.setValue("enable_network_password", new_value)
+        self.network_password_line.setEnabled(new_value)
+        self.show_password_button.setEnabled(new_value)
+
+    def show_password_button_pressed(self):
+        # toggle showing / hiding the password
+        show_pass = self.show_password_button.text() == "Show"
+        self.show_password_button.setText("Hide" if show_pass else "Show")
+        self.network_password_line.setEchoMode(QLineEdit.EchoMode.Normal if show_pass else QLineEdit.EchoMode.Password)
+
+    def create_engines_page(self):
+        """Create the Engines settings page."""
+        page = QWidget()
+        layout = QVBoxLayout()
+
+        # Installed Engines Group
+        installed_group = QGroupBox("Installed Engines")
+        installed_layout = QVBoxLayout()
+
+        # Setup table
+        self.installed_engines_table = EngineTableWidget()
+        self.installed_engines_table.row_selected.connect(self.engine_table_selected)
+        installed_layout.addWidget(self.installed_engines_table)
+
+        # Ignore system installs
+        engine_ignore_system_installs_checkbox = QCheckBox("Ignore system installs")
+        engine_ignore_system_installs_checkbox.setChecked(settings.value("engines_ignore_system_installs", False, type=bool))
+        engine_ignore_system_installs_checkbox.stateChanged.connect(self.change_ignore_system_installs)
+        installed_layout.addWidget(engine_ignore_system_installs_checkbox)
+
+        # Engine Launch / Delete buttons
+        installed_buttons_layout = QHBoxLayout()
+        self.launch_engine_button = QPushButton("Launch")
+        self.launch_engine_button.setEnabled(False)
+        self.launch_engine_button.clicked.connect(self.launch_selected_engine)
+        self.delete_engine_button = QPushButton("Delete")
+        self.delete_engine_button.setEnabled(False)
+        self.delete_engine_button.clicked.connect(self.delete_selected_engine)
+
+        installed_buttons_layout.addWidget(self.launch_engine_button)
+        installed_buttons_layout.addWidget(self.delete_engine_button)
+        installed_layout.addLayout(installed_buttons_layout)
+        installed_group.setLayout(installed_layout)
+
+        # Engine Updates Group
+        engine_updates_group = QGroupBox("Auto-Install")
+        engine_updates_layout = QVBoxLayout()
+
+        engine_download_layout = QHBoxLayout()
+        engine_download_layout.addWidget(QLabel("Enable Downloads for:"))
+
+        at_least_one_downloadable = False
+        for engine in EngineManager.downloadable_engines():
+            engine_download_check = QCheckBox(engine.name())
+            is_checked = settings.value(f"engine_download-{engine.name()}", False, type=bool)
+            at_least_one_downloadable |= is_checked
+            engine_download_check.setChecked(is_checked)
+            # Capture the checkbox correctly using a default argument in lambda
+            engine_download_check.clicked.connect(
+                lambda state, checkbox=engine_download_check: self.engine_download_settings_changed(state, checkbox.text())
+            )
+            engine_download_layout.addWidget(engine_download_check)
+
+        engine_updates_layout.addLayout(engine_download_layout)
+
+        self.check_for_engine_updates_checkbox = QCheckBox("Check for new versions on launch")
+        self.check_for_engine_updates_checkbox.setChecked(settings.value('check_for_engine_updates_on_launch', True, type=bool))
+        self.check_for_engine_updates_checkbox.setEnabled(at_least_one_downloadable)
+        self.check_for_engine_updates_checkbox.stateChanged.connect(
+            lambda state: settings.setValue("check_for_engine_updates_on_launch", bool(state)))
+        engine_updates_layout.addWidget(self.check_for_engine_updates_checkbox)
+        self.engines_last_update_label = QLabel()
+        self.update_last_checked_label()
+        self.engines_last_update_label.setEnabled(at_least_one_downloadable)
+        engine_updates_layout.addWidget(self.engines_last_update_label)
+        self.engine_download_progress_bar = QProgressBar()
+        engine_updates_layout.addWidget(self.engine_download_progress_bar)
+        self.engine_download_progress_bar.setHidden(True)
+        self.check_for_new_engines_button = QPushButton("Check for New Versions...")
+        self.check_for_new_engines_button.setEnabled(at_least_one_downloadable)
+        self.check_for_new_engines_button.clicked.connect(self.check_for_new_engines)
+        engine_updates_layout.addWidget(self.check_for_new_engines_button)
+        engine_updates_group.setLayout(engine_updates_layout)
+
+        layout.addWidget(installed_group)
+        layout.addWidget(engine_updates_group)
+
+        layout.addStretch()  # Add a stretch to push content to the top
+        page.setLayout(layout)
+        return page
+
+    def change_ignore_system_installs(self, value):
+        settings.setValue("engines_ignore_system_installs", bool(value))
+        self.installed_engines_table.update_engines_table()
+
+    def update_last_checked_label(self):
+        """Retrieve the last check timestamp and return a human-friendly string."""
+        last_checked_str = settings.value("engines_last_update_time", None)
+        if not last_checked_str:
+            time_string = "Never"
+        else:
+            last_checked_dt = datetime.fromisoformat(last_checked_str)
+            now = datetime.now()
+            time_string = humanize.naturaltime(now - last_checked_dt)
+        self.engines_last_update_label.setText(f"Last Updated: {time_string}")
+
+    def engine_download_settings_changed(self, state, engine_name):
+        settings.setValue(f"engine_download-{engine_name}", state)
+
+        at_least_one_downloadable = False
+        for engine in EngineManager.downloadable_engines():
+            at_least_one_downloadable |= settings.value(f"engine_download-{engine.name()}", False, type=bool)
+        self.check_for_new_engines_button.setEnabled(at_least_one_downloadable)
+        self.check_for_engine_updates_checkbox.setEnabled(at_least_one_downloadable)
+        self.engines_last_update_label.setEnabled(at_least_one_downloadable)
+
+    def delete_selected_engine(self):
+        engine_info = self.installed_engines_table.selected_engine_data()
+        reply = QMessageBox.question(self, f"Delete {engine_info['engine']} {engine_info['version']}?",
+                                     f"Do you want to delete {engine_info['engine']} {engine_info['version']}?",
+                                     QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No)
+
+        if reply is not QMessageBox.StandardButton.Yes:
+            return
+
+        delete_result = EngineManager.delete_engine_download(engine_info.get('engine'),
+                                                             engine_info.get('version'),
+                                                             engine_info.get('system_os'),
+                                                             engine_info.get('cpu'))
+        self.installed_engines_table.update_engines_table(use_cached=False)
+        if delete_result:
+            QMessageBox.information(self, f"{engine_info['engine']} {engine_info['version']} Deleted",
+                                         f"{engine_info['engine']} {engine_info['version']} deleted successfully",
+                                         QMessageBox.StandardButton.Ok)
+        else:
+            QMessageBox.warning(self, f"Unknown Error",
+                                f"Unknown error while deleting {engine_info['engine']} {engine_info['version']}.",
+                                QMessageBox.StandardButton.Ok)
+
+    def launch_selected_engine(self):
+        engine_info = self.installed_engines_table.selected_engine_data()
+        if engine_info:
+            launch_url(engine_info['path'])
+
+    def engine_table_selected(self):
+        engine_data = self.installed_engines_table.selected_engine_data()
+        if engine_data:
+            self.launch_engine_button.setEnabled(bool(engine_data.get('path') or True))
+            self.delete_engine_button.setEnabled(engine_data.get('type') == 'managed')
+        else:
+            self.launch_engine_button.setEnabled(False)
+            self.delete_engine_button.setEnabled(False)
+
+    def check_for_new_engines(self):
+
+        ignore_system = settings.value("engines_ignore_system_installs", False, type=bool)
+        messagebox_shown = False
+        for engine in EngineManager.downloadable_engines():
+            if settings.value(f'engine_download-{engine.name()}', False, type=bool):
+                result = EngineManager.is_engine_update_available(engine, ignore_system_installs=ignore_system)
+                if result:
+                    result['name'] = engine.name()
+                    msg_box = QMessageBox()
+                    msg_box.setWindowTitle(f"{result['name']} ({result['version']}) Available")
+                    msg_box.setText(f"A new version of {result['name']} is available ({result['version']}).\n\n"
+                                    f"Would you like to download it now?")
+                    msg_box.setIcon(QMessageBox.Icon.Question)
+                    msg_box.setStandardButtons(QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No)
+                    msg_result = msg_box.exec()
+                    messagebox_shown = True
+                    if msg_result == QMessageBox.StandardButton.Yes:
+                        EngineManager.download_engine(engine_name=engine.name(), version=result['version'], background=True,
+                                                      ignore_system=ignore_system)
+                        self.engine_download_progress_bar.setHidden(False)
+                        self.engine_download_progress_bar.setValue(0)
+                        self.engine_download_progress_bar.setMaximum(100)
+                        self.check_for_new_engines_button.setEnabled(False)
+                        self.timer.start(1000)
+
+        if not messagebox_shown:
+            msg_box = QMessageBox()
+            msg_box.setWindowTitle("No Updates Available")
+            msg_box.setText("No Updates Available.")
+            msg_box.setIcon(QMessageBox.Icon.Information)
+            msg_box.setStandardButtons(QMessageBox.StandardButton.Ok)
+            msg_box.exec()
+
+        settings.setValue("engines_last_update_time", datetime.now().isoformat())
+        self.update_engine_download_status()
+
+    def update_engine_download_status(self):
+
+        running_tasks = EngineManager.active_downloads()
+        if not running_tasks:
+            self.timer.stop()
+            self.engine_download_progress_bar.setHidden(True)
+            self.installed_engines_table.update_engines_table(use_cached=False)
+            self.update_last_checked_label()
+            self.check_for_new_engines_button.setEnabled(True)
+            return
+
+        percent_complete = int(running_tasks[0].percent_complete * 100)
+        self.engine_download_progress_bar.setValue(percent_complete)
+        if percent_complete == 100:
+            status_update = f"Installing {running_tasks[0].engine.capitalize()} {running_tasks[0].version}..."
+        else:
+            status_update = f"Downloading {running_tasks[0].engine.capitalize()} {running_tasks[0].version}..."
+        self.engines_last_update_label.setText(status_update)
+
+
+class EngineTableWidget(QWidget):
+    """
+    The EngineTableWidget class displays a table of installed engines.
+
+    Attributes:
+        table: A table widget displaying engine information.
+
+    Methods:
+        on_selection_changed(self): Emits a signal when the user selects a different row in the table.
+    """
+
+    row_selected = Signal()
+
+    def __init__(self):
+        super().__init__()
+
+        self.__get_engine_info_worker = None
+        self.table = QTableWidget(0, 4)
+        self.table.setHorizontalHeaderLabels(["Engine", "Version", "Type", "Path"])
+        self.table.setSelectionBehavior(QAbstractItemView.SelectionBehavior.SelectRows)
+        self.table.verticalHeader().setVisible(False)
+        # self.table_widget.itemSelectionChanged.connect(self.engine_picked)
+        self.table.setEditTriggers(QAbstractItemView.EditTrigger.NoEditTriggers)
+        self.table.selectionModel().selectionChanged.connect(self.on_selection_changed)
+
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+        layout.addWidget(self.table)
+
+        self.raw_server_data = None
+
+    def showEvent(self, event):
+        """Runs when the widget is about to be shown."""
+        self.update_engines_table()
+        super().showEvent(event)  # Ensure normal event processing
+
+    def engine_data_ready(self, raw_server_data):
+        self.raw_server_data = raw_server_data
+        self.update_engines_table()
+
+    def update_engines_table(self, use_cached=True):
+        if not self.raw_server_data or not use_cached:
+            self.__get_engine_info_worker = GetEngineInfoWorker(self)
+            self.__get_engine_info_worker.done.connect(self.engine_data_ready)
+            self.__get_engine_info_worker.start()
+        if not self.raw_server_data:
+            return
+
+        table_data = []  # convert the data into a flat list
+        for _, engine_data in self.raw_server_data.items():
+            table_data.extend(engine_data['versions'])
+
+        if settings.value("engines_ignore_system_installs", False, type=bool):
+            table_data = [x for x in table_data if x['type'] != 'system']
+
+        self.table.clear()
+        self.table.setRowCount(len(table_data))
+        self.table.setColumnCount(4)
+
+        self.table.setHorizontalHeaderLabels(['Engine', 'Version', 'Type', 'Path'])
+        self.table.horizontalHeader().setSectionResizeMode(0, QHeaderView.ResizeMode.Fixed)
+        self.table.horizontalHeader().setSectionResizeMode(1, QHeaderView.ResizeMode.Fixed)
+        self.table.horizontalHeader().setSectionResizeMode(2, QHeaderView.ResizeMode.Fixed)
+        self.table.horizontalHeader().setSectionResizeMode(3, QHeaderView.ResizeMode.Stretch)
+
+        for row, engine in enumerate(table_data):
+            self.table.setItem(row, 0, QTableWidgetItem(engine['engine']))
+            self.table.setItem(row, 1, QTableWidgetItem(engine['version']))
+            self.table.setItem(row, 2, QTableWidgetItem(engine['type']))
+            self.table.setItem(row, 3, QTableWidgetItem(engine['path']))
+
+        self.table.selectRow(0)
+
+    def selected_engine_data(self):
+        """Returns the data from the selected row as a dictionary."""
+        row = self.table.currentRow()  # Get the selected row index
+
+        if row < 0 or not len(self.table.selectedItems()):  # No row selected
+            return None
+
+        data = {
+            "engine": self.table.item(row, 0).text(),
+            "version": self.table.item(row, 1).text(),
+            "type": self.table.item(row, 2).text(),
+            "path": self.table.item(row, 3).text(),
+        }
+
+        return data
+
+    def on_selection_changed(self):
+        self.row_selected.emit()
+
+
+
+if __name__ == "__main__":
+    app = QApplication([])
+    window = SettingsWindow()
+    window.show()
+    app.exec()

src/ui/widgets/dialog.py

@@ -1 +0,0 @@
-''' app/ui/widgets/dialog.py '''

src/ui/widgets/menubar.py

@@ -1,5 +1,6 @@
 ''' app/ui/widgets/menubar.py '''
-from PyQt6.QtWidgets import QMenuBar
+from PyQt6.QtGui import QAction
+from PyQt6.QtWidgets import QMenuBar, QApplication, QMessageBox, QDialog, QVBoxLayout, QLabel, QPushButton
 
 
 class MenuBar(QMenuBar):
@@ -12,12 +13,93 @@ class MenuBar(QMenuBar):
 
     def __init__(self, parent=None) -> None:
         super().__init__(parent)
+
+        self.settings_window = None
+
+        # setup menus
         file_menu = self.addMenu("File")
         # edit_menu = self.addMenu("Edit")
         # view_menu = self.addMenu("View")
-        # help_menu = self.addMenu("Help")
+        help_menu = self.addMenu("Help")
 
-        # Add actions to the menus
+        # --file menu--
-        # file_menu.addAction(self.parent().topbar.actions_call["Open"]) # type: ignore
+        # new job
-        # file_menu.addAction(self.parent().topbar.actions_call["Save"]) # type: ignore
+        new_job_action = QAction("New Job...", self)
-        # file_menu.addAction(self.parent().topbar.actions_call["Exit"]) # type: ignore
+        new_job_action.setShortcut(f'Ctrl+N')
+        new_job_action.triggered.connect(self.new_job)
+        file_menu.addAction(new_job_action)
+        # settings
+        settings_action = QAction("Settings...", self)
+        settings_action.triggered.connect(self.show_settings)
+        settings_action.setShortcut(f'Ctrl+,')
+        file_menu.addAction(settings_action)
+        # exit
+        exit_action = QAction('&Exit', self)
+        exit_action.setShortcut('Ctrl+Q')
+        exit_action.triggered.connect(QApplication.instance().quit)
+        file_menu.addAction(exit_action)
+
+        # --help menu--
+        about_action = QAction("About", self)
+        about_action.triggered.connect(self.show_about)
+        help_menu.addAction(about_action)
+        update_action = QAction("Check for Updates...", self)
+        update_action.triggered.connect(self.check_for_updates)
+        help_menu.addAction(update_action)
+
+    def new_job(self):
+        self.parent().new_job()
+
+    def show_settings(self):
+        from src.ui.settings_window import SettingsWindow
+        self.settings_window = SettingsWindow()
+        self.settings_window.show()
+
+    @staticmethod
+    def show_about():
+        from src.ui.about_window import AboutDialog
+        dialog = AboutDialog()
+        dialog.exec()
+
+    @staticmethod
+    def check_for_updates():
+        from src.utilities.misc_helper import check_for_updates
+        from src.version import APP_NAME, APP_VERSION, APP_REPO_NAME, APP_REPO_OWNER
+        found_update = check_for_updates(APP_REPO_NAME, APP_REPO_OWNER, APP_NAME, APP_VERSION)
+        if found_update:
+            dialog = UpdateDialog(found_update, APP_VERSION)
+            dialog.exec()
+        else:
+            QMessageBox.information(None, "No Update", "No updates available.")
+
+
+class UpdateDialog(QDialog):
+    def __init__(self, release_info, current_version, parent=None):
+        super().__init__(parent)
+        self.setWindowTitle(f"Update Available ({current_version} -> {release_info['tag_name']})")
+
+        layout = QVBoxLayout()
+        label = QLabel(f"A new version ({release_info['tag_name']}) is available! Current version: {current_version}")
+        layout.addWidget(label)
+
+        # Label to show the release notes
+        description = QLabel(release_info["body"])
+        layout.addWidget(description)
+
+        # Button to download the latest version
+        download_button = QPushButton(f"Download Latest Version ({release_info['tag_name']})")
+        download_button.clicked.connect(lambda: self.open_url(release_info["html_url"]))
+        layout.addWidget(download_button)
+
+        # OK button to dismiss the dialog
+        ok_button = QPushButton("Dismiss")
+        ok_button.clicked.connect(self.accept)  # Close the dialog when clicked
+        layout.addWidget(ok_button)
+
+        self.setLayout(layout)
+
+    def open_url(self, url):
+        from PyQt6.QtCore import QUrl
+        from PyQt6.QtGui import QDesktopServices
+        QDesktopServices.openUrl(QUrl(url))
+        self.accept()

src/ui/widgets/statusbar.py

@@ -9,6 +9,7 @@ from PyQt6.QtGui import QPixmap
 from PyQt6.QtWidgets import QStatusBar, QLabel
 
 from src.api.server_proxy import RenderServerProxy
+from src.engines.engine_manager import EngineManager
 from src.utilities.misc_helper import resources_dir
 
 
@@ -28,17 +29,27 @@ class StatusBar(QStatusBar):
             proxy = RenderServerProxy(socket.gethostname())
             proxy.start_background_update()
             image_names = {'Ready': 'GreenCircle.png', 'Offline': "RedSquare.png"}
-            last_update = None
 
             # Check for status change every 1s on background thread
             while True:
-                new_status = proxy.status()
+                try:
-                if new_status is not last_update:
+                    # update status label - get download status
-                    new_image_name = image_names.get(new_status, 'Synchronize.png')
+                    new_status = proxy.status()
-                    image_path = os.path.join(resources_dir(), 'icons', new_image_name)
+                    active_downloads = EngineManager.active_downloads()
-                    self.label.setPixmap((QPixmap(image_path).scaled(16, 16, Qt.AspectRatioMode.KeepAspectRatio)))
+                    if active_downloads:
+                        if len(active_downloads) == 1:
+                            task = active_downloads[0]
+                            new_status = f"{new_status} | Downloading {task.engine.capitalize()} {task.version}..."
+                        else:
+                            new_status = f"{new_status} | Downloading {len(active_downloads)} engines"
                     self.messageLabel.setText(new_status)
-                    last_update = new_status
+
+                    # update status image
+                    new_image_name = image_names.get(new_status, 'Synchronize.png')
+                    new_image_path = os.path.join(resources_dir(), new_image_name)
+                    self.label.setPixmap((QPixmap(new_image_path).scaled(16, 16, Qt.AspectRatioMode.KeepAspectRatio)))
+                except RuntimeError:  # ignore runtime errors during shutdown
+                    pass
                 time.sleep(1)
 
         background_thread = threading.Thread(target=background_update,)
@@ -47,7 +58,7 @@ class StatusBar(QStatusBar):
 
         # Create a label that holds an image
         self.label = QLabel()
-        image_path = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), 'resources', 'icons',
+        image_path = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), 'resources',
                                   'RedSquare.png')
         pixmap = (QPixmap(image_path).scaled(16, 16, Qt.AspectRatioMode.KeepAspectRatio))
         self.label.setPixmap(pixmap)

src/utilities/benchmark.py

@@ -0,0 +1,78 @@
+import concurrent.futures
+import os
+import time
+import logging
+
+logger = logging.getLogger()
+
+
+def cpu_workload(n):
+    # Simple arithmetic operation for workload
+    while n > 0:
+        n -= 1
+    return n
+
+
+def cpu_benchmark(duration_seconds=10):
+    # Determine the number of available CPU cores
+    num_cores = os.cpu_count()
+
+    # Calculate workload per core, assuming a large number for the workload
+    workload_per_core = 10000000
+
+    # Record start time
+    start_time = time.time()
+
+    # Use ProcessPoolExecutor to utilize all CPU cores
+    with concurrent.futures.ProcessPoolExecutor() as executor:
+        # Launching tasks for each core
+        futures = [executor.submit(cpu_workload, workload_per_core) for _ in range(num_cores)]
+
+        # Wait for all futures to complete, with a timeout to limit the benchmark duration
+        concurrent.futures.wait(futures, timeout=duration_seconds)
+
+    # Record end time
+    end_time = time.time()
+
+    # Calculate the total number of operations (workload) done by all cores
+    total_operations = workload_per_core * num_cores
+    # Calculate the total time taken
+    total_time = end_time - start_time
+    # Calculate operations per second as the score
+    score = total_operations / total_time
+    score = score * 0.0001
+
+    return int(score)
+
+
+def disk_io_benchmark(file_size_mb=100, filename='benchmark_test_file'):
+    write_speed = None
+    read_speed = None
+
+    # Measure write speed
+    start_time = time.time()
+    with open(filename, 'wb') as f:
+        f.write(os.urandom(file_size_mb * 1024 * 1024))  # Write random bytes to file
+    end_time = time.time()
+    write_time = end_time - start_time
+    write_speed = file_size_mb / write_time
+
+    # Measure read speed
+    start_time = time.time()
+    with open(filename, 'rb') as f:
+        content = f.read()
+    end_time = time.time()
+    read_time = end_time - start_time
+    read_speed = file_size_mb / read_time
+
+    # Cleanup
+    os.remove(filename)
+
+    logger.debug(f"Disk Write Speed: {write_speed:.2f} MB/s")
+    logger.debug(f"Disk Read Speed: {read_speed:.2f} MB/s")
+    return write_speed, read_speed
+
+
+if __name__ == '__main__':
+    print(cpu_benchmark())
+    print(disk_io_benchmark())

src/utilities/config.py

@@ -1,15 +1,30 @@
 import os
+from pathlib import Path
+from typing import Optional
+
 import yaml
+from src.utilities.misc_helper import current_system_os, copy_directory_contents
+
+_CONFIG_ATTRS = [
+    'upload_folder', 'update_engines_on_launch', 'max_content_path',
+    'server_log_level', 'log_buffer_length', 'worker_process_timeout',
+    'flask_log_level', 'flask_debug_enable', 'queue_eval_seconds',
+    'port_number', 'enable_split_jobs', 'download_timeout_seconds',
+]
 
 
 class Config:
-    # Initialize class variables with default values
+    _default_instance: Optional['Config'] = None
+
+    # Class-level defaults — mutated by _sync_class() so existing
+    # callers (Config.upload_folder) continue to work during the
+    # migration to instance-based access.
     upload_folder = "~/zordon-uploads/"
     update_engines_on_launch = True
     max_content_path = 100000000
     server_log_level = 'debug'
     log_buffer_length = 250
-    subjob_connection_timeout = 120
+    worker_process_timeout = 120
     flask_log_level = 'error'
     flask_debug_enable = False
     queue_eval_seconds = 1
@@ -17,20 +32,63 @@ class Config:
     enable_split_jobs = True
     download_timeout_seconds = 120
 
-    @classmethod
+    def __init__(self) -> None:
-    def load_config(cls, config_path):
+        for attr in _CONFIG_ATTRS:
+            setattr(self, attr, getattr(Config, attr))
+
+    def load(self, config_path: Path) -> None:
         with open(config_path, 'r') as ymlfile:
             cfg = yaml.safe_load(ymlfile)
+        for attr in _CONFIG_ATTRS:
+            if attr in cfg:
+                setattr(self, attr, cfg[attr])
+        self.upload_folder = str(Path(self.upload_folder).expanduser())
 
-        cls.upload_folder = os.path.expanduser(cfg.get('upload_folder', cls.upload_folder))
+    @classmethod
-        cls.update_engines_on_launch = cfg.get('update_engines_on_launch', cls.update_engines_on_launch)
+    def _sync_class(cls) -> None:
-        cls.max_content_path = cfg.get('max_content_path', cls.max_content_path)
+        if cls._default_instance is not None:
-        cls.server_log_level = cfg.get('server_log_level', cls.server_log_level)
+            for attr in _CONFIG_ATTRS:
-        cls.log_buffer_length = cfg.get('log_buffer_length', cls.log_buffer_length)
+                setattr(cls, attr, getattr(cls._default_instance, attr))
-        cls.subjob_connection_timeout = cfg.get('subjob_connection_timeout', cls.subjob_connection_timeout)
+
-        cls.flask_log_level = cfg.get('flask_log_level', cls.flask_log_level)
+    @classmethod
-        cls.flask_debug_enable = cfg.get('flask_debug_enable', cls.flask_debug_enable)
+    def load_config(cls, config_path: Path) -> None:
-        cls.queue_eval_seconds = cfg.get('queue_eval_seconds', cls.queue_eval_seconds)
+        instance = Config()
-        cls.port_number = cfg.get('port_number', cls.port_number)
+        instance.load(config_path)
-        cls.enable_split_jobs = cfg.get('enable_split_jobs', cls.enable_split_jobs)
+        cls._default_instance = instance
-        cls.download_timeout_seconds = cfg.get('download_timeout_seconds', cls.download_timeout_seconds)
+        cls._sync_class()
+
+    @classmethod
+    def config_dir(cls) -> Path:
+        # Set up the config path
+        if current_system_os() == 'macos':
+            local_config_path = Path('~/Library/Application Support/Zordon').expanduser()
+        elif current_system_os() == 'windows':
+            local_config_path = Path(os.environ['APPDATA']) / 'Zordon'
+        else:
+            local_config_path = Path('~/.config/Zordon').expanduser()
+        return local_config_path
+
+    @classmethod
+    def setup_config_dir(cls):
+        # Set up the config path
+        local_config_dir = cls.config_dir()
+        if os.path.exists(local_config_dir):
+            return
+
+        try:
+            # Create the local configuration directory
+            os.makedirs(local_config_dir)
+
+            # Determine the template path
+            resource_environment_path = os.environ.get('RESOURCEPATH')
+            if resource_environment_path:
+                template_path = Path(resource_environment_path) / 'config'
+            else:
+                template_path = Path(__file__).resolve().parents[2] / 'config'
+
+            # Copy contents from the template to the local configuration directory
+            copy_directory_contents(template_path, local_config_dir)
+
+        except Exception as e:
+            print(f"An error occurred while setting up the config directory: {e}")
+            raise

src/utilities/ffmpeg_helper.py

@@ -4,17 +4,18 @@ from src.engines.ffmpeg.ffmpeg_engine import FFMPEG
 
 def image_sequence_to_video(source_glob_pattern, output_path, framerate=24, encoder="prores_ks", profile=4,
                             start_frame=1):
-    subprocess.run([FFMPEG.default_renderer_path(), "-framerate", str(framerate), "-start_number", str(start_frame), "-i",
+    subprocess.run([FFMPEG.default_engine_path(), "-framerate", str(framerate), "-start_number",
-                    f"{source_glob_pattern}", "-c:v", encoder, "-profile:v", str(profile), '-pix_fmt', 'yuva444p10le',
+                    str(start_frame), "-i", f"{source_glob_pattern}", "-c:v", encoder, "-profile:v", str(profile),
-                    output_path], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)
+                    '-pix_fmt', 'yuva444p10le', output_path], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL,
+                   check=True)
 
 
 def save_first_frame(source_path, dest_path, max_width=1280):
-    subprocess.run([FFMPEG.default_renderer_path(), '-i', source_path, '-vf', f'scale={max_width}:-1',
+    subprocess.run([FFMPEG.default_engine_path(), '-i', source_path, '-vf', f'scale={max_width}:-1',
                     '-vframes', '1', dest_path], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)
 
 
 def generate_thumbnail(source_path, dest_path, max_width=240, fps=12):
-    subprocess.run([FFMPEG.default_renderer_path(), '-i', source_path, '-vf',
+    subprocess.run([FFMPEG.default_engine_path(), '-i', source_path, '-vf',
                     f"scale={max_width}:trunc(ow/a/2)*2,format=yuv420p", '-r', str(fps), '-c:v', 'libx264', '-preset',
                     'ultrafast', '-an', dest_path], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)

src/utilities/misc_helper.py

@@ -1,25 +1,44 @@
 import logging
+import json
 import os
 import platform
+import re
+import shutil
 import socket
+import string
 import subprocess
+import sys
 from datetime import datetime
+from typing import Optional, List, Dict, Any
 
 logger = logging.getLogger()
 
 
-def launch_url(url):
+def launch_url(url: str) -> None:
-    if subprocess.run(['which', 'xdg-open'], capture_output=True).returncode == 0:
+    logger = logging.getLogger(__name__)
-        subprocess.run(['xdg-open', url])  # linux
+
-    elif subprocess.run(['which', 'open'], capture_output=True).returncode == 0:
+    if shutil.which('xdg-open'):
-        subprocess.run(['open', url])  # macos
+        opener = 'xdg-open'
-    elif subprocess.run(['which', 'start'], capture_output=True).returncode == 0:
+    elif shutil.which('open'):
-        subprocess.run(['start', url])  # windows - need to validate this works
+        opener = 'open'
+    elif shutil.which('cmd'):
+        opener = 'start'
     else:
-        logger.error(f"No valid launchers found to launch url: {url}")
+        error_message = f"No valid launchers found to launch URL: {url}"
+        logger.error(error_message)
+        raise OSError(error_message)
+
+    try:
+        if opener == 'start':
+            # For Windows, use 'cmd /c start'
+            subprocess.run(['cmd', '/c', 'start', url], shell=False)
+        else:
+            subprocess.run([opener, url])
+    except Exception as e:
+        logger.error(f"Failed to launch URL: {url}. Error: {e}")
 
 
-def file_exists_in_mounts(filepath):
+def file_exists_in_mounts(filepath: str) -> Optional[str]:
     """
     Check if a file exists in any mounted directory.
     It searches for the file in common mount points like '/Volumes', '/mnt', and '/media'.
@@ -34,9 +53,9 @@ def file_exists_in_mounts(filepath):
         path = os.path.normpath(path)
         components = []
         while True:
-            path, component = os.path.split(path)
+            path, comp = os.path.split(path)
-            if component:
+            if comp:
-                components.append(component)
+                components.append(comp)
             else:
                 if path:
                     components.append(path)
@@ -60,22 +79,19 @@ def file_exists_in_mounts(filepath):
                         return possible_mount_path
 
 
-def get_time_elapsed(start_time=None, end_time=None):
+def get_time_elapsed(start_time: Optional[datetime] = None, end_time: Optional[datetime] = None) -> str:
-
-    from string import Template
-
-    class DeltaTemplate(Template):
-        delimiter = "%"
 
     def strfdelta(tdelta, fmt='%H:%M:%S'):
-        d = {"D": tdelta.days}
+        days = tdelta.days
         hours, rem = divmod(tdelta.seconds, 3600)
         minutes, seconds = divmod(rem, 60)
-        d["H"] = '{:02d}'.format(hours)
+
-        d["M"] = '{:02d}'.format(minutes)
+        # Using f-strings for formatting
-        d["S"] = '{:02d}'.format(seconds)
+        formatted_str = fmt.replace('%D', f'{days}')
-        t = DeltaTemplate(fmt)
+        formatted_str = formatted_str.replace('%H', f'{hours:02d}')
-        return t.substitute(**d)
+        formatted_str = formatted_str.replace('%M', f'{minutes:02d}')
+        formatted_str = formatted_str.replace('%S', f'{seconds:02d}')
+        return formatted_str
 
     # calculate elapsed time
     elapsed_time = None
@@ -90,10 +106,10 @@ def get_time_elapsed(start_time=None, end_time=None):
     return elapsed_time_string
 
 
-def get_file_size_human(file_path):
+def get_file_size_human(file_path: str) -> str:
     size_in_bytes = os.path.getsize(file_path)
 
-    # Convert size to a human readable format
+    # Convert size to a human-readable format
     if size_in_bytes < 1024:
         return f"{size_in_bytes} B"
     elif size_in_bytes < 1024 ** 2:
@@ -106,43 +122,274 @@ def get_file_size_human(file_path):
         return f"{size_in_bytes / 1024 ** 4:.2f} TB"
 
 
-# Convert path to the appropriate format for the current platform
+def current_system_os() -> str:
-def system_safe_path(path):
-    if platform.system().lower() == "windows":
-        return os.path.normpath(path)
-    return path.replace("\\", "/")
-
-
-def current_system_os():
     return platform.system().lower().replace('darwin', 'macos')
 
 
-def current_system_os_version():
+def current_system_os_version() -> str:
-    return platform.mac_ver()[0] if current_system_os() == 'macos' else platform.release().lower()
+    return platform.release()
 
 
-def current_system_cpu():
+def current_system_cpu() -> str:
-    # convert all x86 64 to "x64"
+    return platform.machine().lower().replace('amd64', 'x64')
-    return platform.machine().lower().replace('amd64', 'x64').replace('x86_64', 'x64')
 
 
-def resources_dir():
+def current_system_cpu_brand() -> str:
-    resources_directory = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))),
+    """Fast cross-platform CPU brand string"""
-                                       'resources')
+    if sys.platform.startswith('darwin'):  # macOS
-    return resources_directory
+        try:
+            return subprocess.check_output(['sysctl', '-n', 'machdep.cpu.brand_string']).decode().strip()
+        except Exception:
+            pass
+    elif sys.platform.startswith('win'):  # Windows
+        from winreg import HKEY_LOCAL_MACHINE, OpenKey, QueryValueEx
+        try:
+            # Open the registry key where Windows stores the CPU name
+            key = OpenKey(HKEY_LOCAL_MACHINE, r"HARDWARE\DESCRIPTION\System\CentralProcessor\0")
+            # The value name is "ProcessorNameString"
+            value, _ = QueryValueEx(key, "ProcessorNameString")
+            return value.strip()  # Usually perfect, with full marketing name
+        except Exception:
+            # Fallback: sometimes the key is under a different index, try 1
+            try:
+                key = OpenKey(HKEY_LOCAL_MACHINE, r"HARDWARE\DESCRIPTION\System\CentralProcessor\1")
+                value, _ = QueryValueEx(key, "ProcessorNameString")
+                return value.strip()
+            except Exception:
+                return "Unknown CPU"
+    elif sys.platform.startswith('linux'):
+        try:
+            with open('/proc/cpuinfo') as f:
+                for line in f:
+                    if line.startswith('model name'):
+                        return line.split(':', 1)[1].strip()
+        except Exception:
+            pass
+
+    # Ultimate fallback
+    return platform.processor() or 'Unknown CPU'
+
+def resources_dir() -> str:
+    return os.path.join(os.path.dirname(__file__), '..', '..', 'resources')
 
 
-def config_dir():
+def copy_directory_contents(src_dir: str, dst_dir: str) -> None:
-    config_directory = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))),
+    for item in os.listdir(src_dir):
-                                       'config')
+        src_path = os.path.join(src_dir, item)
-    return config_directory
+        dst_path = os.path.join(dst_dir, item)
+        if os.path.isdir(src_path):
+            shutil.copytree(src_path, dst_path)
+        else:
+            shutil.copy2(src_path, dst_path)
 
 
-def is_localhost(comparison_hostname):
+def check_for_updates(repo_name: str, repo_owner: str, app_name: str, current_version: str) -> Optional[Dict[str, Any]]:
-    # this is necessary because socket.gethostname() does not always include '.local' - This is a sanitized comparison
+    def get_github_releases(owner, repo):
-    try:
+        import requests
-        comparison_hostname = comparison_hostname.lower().replace('.local', '')
+        url = f"https://api.github.com/repos/{owner}/{repo}/releases"
-        local_hostname = socket.gethostname().lower().replace('.local', '')
+        try:
-        return comparison_hostname == local_hostname
+            response = requests.get(url, timeout=3)
-    except AttributeError:
+            response.raise_for_status()
-        return False
+            releases = response.json()
+            return releases
+        except Exception as e:
+            logger.error(f"Error checking for updates: {e}")
+            return []
+
+    releases = get_github_releases(repo_owner, repo_name)
+    if not releases:
+        return None
+
+    latest_version = releases[0]
+    latest_version_tag = latest_version['tag_name']
+
+    from packaging import version
+    if version.parse(latest_version_tag) > version.parse(current_version):
+        logger.info(f"Newer version of {app_name} available. "
+                    f"Latest: {latest_version_tag}, Current: {current_version}")
+        return latest_version
+    return None
+
+def is_localhost(comparison_hostname: str) -> bool:
+    return comparison_hostname in ['localhost', '127.0.0.1', socket.gethostname()]
+
+
+def num_to_alphanumeric(num: int) -> str:
+    return string.ascii_letters[num % 26] + str(num // 26)
+
+
+def get_gpu_info() -> List[Dict[str, Any]]:
+    """Cross-platform GPU information retrieval"""
+
+    def get_windows_gpu_info():
+        """Get GPU info on Windows"""
+        try:
+            result = subprocess.run(
+                ['wmic', 'path', 'win32_videocontroller', 'get', 'name,AdapterRAM', '/format:list'],
+                capture_output=True, text=True, timeout=5
+            )
+
+            # Virtual adapters to exclude
+            virtual_adapters = [
+                'virtual', 'rdp', 'hyper-v', 'microsoft basic', 'basic display',
+                'vga compatible', 'dummy', 'nvfbc', 'nvencode'
+            ]
+
+            gpus = []
+            current_gpu = None
+
+            for line in result.stdout.strip().split('\n'):
+                line = line.strip()
+                if not line:
+                    continue
+
+                if line.startswith('Name='):
+                    if current_gpu and current_gpu.get('name'):
+                        gpus.append(current_gpu)
+                    gpu_name = line.replace('Name=', '').strip()
+
+                    # Skip virtual adapters
+                    if any(virtual in gpu_name.lower() for virtual in virtual_adapters):
+                        current_gpu = None
+                    else:
+                        current_gpu = {'name': gpu_name, 'memory': 'Integrated'}
+
+                elif line.startswith('AdapterRAM=') and current_gpu:
+                    vram_bytes_str = line.replace('AdapterRAM=', '').strip()
+                    if vram_bytes_str and vram_bytes_str != '0':
+                        try:
+                            vram_gb = int(vram_bytes_str) / (1024**3)
+                            current_gpu['memory'] = round(vram_gb, 2)
+                        except:
+                            pass
+
+            if current_gpu and current_gpu.get('name'):
+                gpus.append(current_gpu)
+
+            return gpus if gpus else [{'name': 'Unknown GPU', 'memory': 'Unknown'}]
+        except Exception as e:
+            logger.error(f"Failed to get Windows GPU info: {e}")
+            return [{'name': 'Unknown GPU', 'memory': 'Unknown'}]
+
+    def get_macos_gpu_info():
+        """Get GPU info on macOS (works with Apple Silicon)"""
+        try:
+            if current_system_cpu() == "arm64":
+                # don't bother with system_profiler with Apple ARM - we know its integrated
+                return [{'name': current_system_cpu_brand(), 'memory': 'Integrated'}]
+
+            result = subprocess.run(['system_profiler', 'SPDisplaysDataType', '-detailLevel', 'mini', '-json'],
+                                capture_output=True, text=True, timeout=5)
+            data = json.loads(result.stdout)
+
+            gpus = []
+            displays = data.get('SPDisplaysDataType', [])
+            for display in displays:
+                if 'sppci_model' in display:
+                    gpus.append({
+                        'name': display.get('sppci_model', 'Unknown GPU'),
+                        'memory': display.get('sppci_vram', 'Integrated'),
+                    })
+            return gpus if gpus else [{'name': 'Apple GPU', 'memory': 'Integrated'}]
+        except Exception as e:
+            print(f"Failed to get macOS GPU info: {e}")
+            return [{'name': 'Unknown GPU', 'memory': 'Unknown'}]
+
+    def get_linux_gpu_info():
+        gpus = []
+        try:
+            # Run plain lspci and filter for GPU-related lines
+            output = subprocess.check_output(
+                ["lspci"], universal_newlines=True, stderr=subprocess.DEVNULL
+            )
+            for line in output.splitlines():
+                if any(keyword in line.lower() for keyword in ["vga", "3d", "display"]):
+                    # Extract the part after the colon (vendor + model)
+                    if ":" in line:
+                        name_part = line.split(":", 1)[1].strip()
+                        # Clean up common extras like (rev xx) or (prog-if ...)
+                        name = name_part.split("(")[0].split("controller:")[-1].strip()
+                        vendor = "Unknown"
+                        if "nvidia" in name.lower():
+                            vendor = "NVIDIA"
+                        elif "amd" in name.lower() or "ati" in name.lower():
+                            vendor = "AMD"
+                        elif "intel" in name.lower():
+                            vendor = "Intel"
+
+                        gpus.append({
+                            "name": name,
+                            "vendor": vendor,
+                            "memory": "Unknown"
+                        })
+        except FileNotFoundError:
+            print("lspci not found. Install pciutils: sudo apt install pciutils")
+            return []
+        except Exception as e:
+            print(f"Error running lspci: {e}")
+            return []
+
+        return gpus
+
+    system = platform.system()
+
+    if system == 'Darwin':  # macOS
+        return get_macos_gpu_info()
+    elif system == 'Windows':
+        return get_windows_gpu_info()
+    else:  # Assume Linux or other
+        return get_linux_gpu_info()
+
+
+COMMON_RESOLUTIONS = {
+    # SD
+    "SD_480p": (640, 480),
+    "NTSC_DVD": (720, 480),
+    "PAL_DVD": (720, 576),
+
+    # HD
+    "HD_720p": (1280, 720),
+    "HD_900p": (1600, 900),
+    "HD_1080p": (1920, 1080),
+
+    # Cinema / Film
+    "2K_DCI": (2048, 1080),
+    "4K_DCI": (4096, 2160),
+
+    # UHD / Consumer
+    "UHD_4K": (3840, 2160),
+    "UHD_5K": (5120, 2880),
+    "UHD_8K": (7680, 4320),
+
+    # Ultrawide / Aspect Variants
+    "UW_1080p": (2560, 1080),
+    "UW_1440p": (3440, 1440),
+    "UW_5K": (5120, 2160),
+
+    # Mobile / Social
+    "VERTICAL_1080x1920": (1080, 1920),
+    "SQUARE_1080": (1080, 1080),
+
+    # Classic / Legacy
+    "VGA": (640, 480),
+    "SVGA": (800, 600),
+    "XGA": (1024, 768),
+    "WXGA": (1280, 800),
+}
+
+COMMON_FRAME_RATES = {
+    "23.976 (NTSC Film)": 23.976,
+    "24 (Cinema)": 24.0,
+    "25 (PAL)": 25.0,
+    "29.97 (NTSC)": 29.97,
+    "30": 30.0,
+    "48 (HFR Film)": 48.0,
+    "50 (PAL HFR)": 50.0,
+    "59.94": 59.94,
+    "60": 60.0,
+    "72": 72.0,
+    "90 (VR)": 90.0,
+    "120": 120.0,
+    "144 (Gaming)": 144.0,
+    "240 (HFR)": 240.0,
+}

src/utilities/server_helper.py

@@ -1,47 +1,200 @@
 import logging
 import os
-import subprocess
+import zipfile
-import threading
+from concurrent.futures import ThreadPoolExecutor
 
-from src.utilities.ffmpeg_helper import generate_thumbnail, save_first_frame
+import requests
+
+from src.api.server_proxy import RenderServerProxy
+from src.utilities.misc_helper import get_file_size_human
+from src.utilities.zeroconf_server import ZeroconfServer
 
 logger = logging.getLogger()
 
 
-def generate_thumbnail_for_job(job, thumb_video_path, thumb_image_path, max_width=320):
+def download_missing_frames_from_subjob(local_job, subjob_id, subjob_hostname):
+    success = True
+    try:
+        local_files = [os.path.basename(x) for x in local_job.file_list()]
+        subjob_proxy = RenderServerProxy(subjob_hostname)
+        subjob_files = subjob_proxy.get_job_files(job_id=subjob_id) or []
 
-    # Simple thread to generate thumbs in background
+        for subjob_filename in subjob_files:
-    def generate_thumb_thread(source):
+            if subjob_filename not in local_files:
-        in_progress_path = thumb_video_path + '_IN-PROGRESS'
+                try:
-        subprocess.run(['touch', in_progress_path])
+                    logger.debug(f"Downloading new file '{subjob_filename}' from {subjob_hostname}")
-        try:
+                    local_save_path = os.path.join(os.path.dirname(local_job.output_path), subjob_filename)
-            logger.debug(f"Generating video thumbnail for {source}")
+                    subjob_proxy.download_job_file(job_id=subjob_id, job_filename=subjob_filename,
-            generate_thumbnail(source_path=source, dest_path=thumb_video_path, max_width=max_width)
+                                                   save_path=local_save_path)
-        except subprocess.CalledProcessError as err:
+                    logger.debug(f'Downloaded successfully - {local_save_path}')
-            logger.error(f"Error generating video thumbnail for {source}: {err}")
+                except Exception as e:
+                    logger.error(f"Error downloading file '{subjob_filename}' from {subjob_hostname}: {e}")
+                    success = False
+    except Exception as e:
+        logger.exception(f'Uncaught exception while trying to download from subjob: {e}')
+        success = False
+    return success
 
-        try:
-            os.remove(in_progress_path)
-        except FileNotFoundError:
-            pass
 
-    # Determine best source file to use for thumbs
+def download_all_from_subjob(local_job, subjob_id, subjob_hostname):
-    source_files = job.file_list() or [job.input_path]
+    """
-    if source_files:
+    Downloads and extracts files from a completed subjob on a remote server.
-        video_formats = ['.mp4', '.mov', '.avi', '.mpg', '.mpeg', '.mxf', '.m4v', 'mkv']
-        image_formats = ['.jpg', '.png', '.exr']
 
-        image_files = [f for f in source_files if os.path.splitext(f)[-1].lower() in image_formats]
+    Parameters:
-        video_files = [f for f in source_files if os.path.splitext(f)[-1].lower() in video_formats]
+    local_job (BaseRenderWorker): The local parent job worker.
+    subjob_id (str or int): The ID of the subjob.
+    subjob_hostname (str): The hostname of the remote server where the subjob is located.
 
-        if (video_files or image_files) and not os.path.exists(thumb_image_path):
+    Returns:
+    bool: True if the files have been downloaded and extracted successfully, False otherwise.
+    """
+
+    child_key = f'{subjob_id}@{subjob_hostname}'
+    logname = f"{local_job.id}:{child_key}"
+    zip_file_path = local_job.output_path + f'_{subjob_hostname}_{subjob_id}.zip'
+
+    # download zip file from server
+    try:
+        local_job.children[child_key]['download_status'] = 'working'
+        logger.info(f"Downloading completed subjob files from {subjob_hostname} to localhost")
+        RenderServerProxy(subjob_hostname).download_all_job_files(subjob_id, zip_file_path)
+        logger.info(f"File transfer complete for {logname} - Transferred {get_file_size_human(zip_file_path)}")
+    except Exception as e:
+        logger.error(f"Error downloading files from remote server: {e}")
+        local_job.children[child_key]['download_status'] = 'failed'
+        return False
+
+    # extract zip
+    try:
+        logger.debug(f"Extracting zip file: {zip_file_path}")
+        extract_path = os.path.dirname(zip_file_path)
+        with zipfile.ZipFile(zip_file_path, 'r') as zip_ref:
+            zip_ref.extractall(extract_path)
+            logger.info(f"Successfully extracted zip to: {extract_path}")
+        os.remove(zip_file_path)
+        local_job.children[child_key]['download_status'] = 'complete'
+    except Exception as e:
+        logger.exception(f"Exception extracting zip file: {e}")
+        local_job.children[child_key]['download_status'] = 'failed'
+
+    return local_job.children[child_key].get('download_status', None) == 'complete'
+
+
+def distribute_server_work(start_frame, end_frame, available_servers, method='evenly'):
+    """
+    Splits the frame range among available servers proportionally based on their performance (CPU count).
+
+    Args:
+        start_frame (int): The start frame number of the animation to be rendered.
+        end_frame (int): The end frame number of the animation to be rendered.
+        available_servers (list): A list of available server dictionaries. Each server dictionary should include
+        'hostname' and 'cpu_count' keys (see find_available_servers).
+        method (str, optional): Specifies the distribution method. Possible values are 'cpu_benchmark', 'cpu_count'
+        and 'evenly'.
+        Defaults to 'cpu_benchmark'.
+
+    Returns:
+        list: A list of server dictionaries where each dictionary includes the frame range and total number of
+        frames to be rendered by the server.
+    """
+    # Calculate respective frames for each server
+    def divide_frames_by_cpu_count(frame_start, frame_end, servers):
+        total_frames = frame_end - frame_start + 1
+        total_cpus = sum(server['cpu_count'] for server in servers)
+
+        frame_ranges = {}
+        current_frame = frame_start
+        allocated_frames = 0
+
+        for i, server in enumerate(servers):
+            if i == len(servers) - 1:  # if it's the last server
+                # Give all remaining frames to the last server
+                num_frames = total_frames - allocated_frames
+            else:
+                num_frames = round((server['cpu_count'] / total_cpus) * total_frames)
+                allocated_frames += num_frames
+
+            frame_end_for_server = current_frame + num_frames - 1
+
+            if current_frame <= frame_end_for_server:
+                frame_ranges[server['hostname']] = (current_frame, frame_end_for_server)
+            current_frame = frame_end_for_server + 1
+
+        return frame_ranges
+
+    def divide_frames_by_benchmark(frame_start, frame_end, servers):
+
+        def fetch_benchmark(server):
             try:
-                path_of_source = image_files[0] if image_files else video_files[0]
+                benchmark = requests.get(f'http://{server["hostname"]}:{ZeroconfServer.server_port}'
-                logger.debug(f"Generating image thumbnail for {path_of_source}")
+                                         f'/api/cpu_benchmark', timeout=15).text
-                save_first_frame(source_path=path_of_source, dest_path=thumb_image_path, max_width=max_width)
+                server['cpu_benchmark'] = benchmark
-            except Exception as e:
+                logger.debug(f'Benchmark for {server["hostname"]}: {benchmark}')
-                logger.error(f"Exception saving first frame: {e}")
+            except requests.exceptions.RequestException as e:
+                logger.error(f'Error fetching benchmark for {server["hostname"]}: {e}')
 
-        if video_files and not os.path.exists(thumb_video_path):
+        # Number of threads to use (can adjust based on your needs or number of servers)
-            x = threading.Thread(target=generate_thumb_thread, args=(video_files[0],))
+        threads = len(servers)
-            x.start()
+
+        with ThreadPoolExecutor(max_workers=threads) as executor:
+            executor.map(fetch_benchmark, servers)
+
+        total_frames = frame_end - frame_start + 1
+        total_performance = sum(int(server['cpu_benchmark']) for server in servers)
+
+        frame_ranges = {}
+        current_frame = frame_start
+        allocated_frames = 0
+
+        for i, server in enumerate(servers):
+            if i == len(servers) - 1:  # if it's the last server
+                # Give all remaining frames to the last server
+                num_frames = total_frames - allocated_frames
+            else:
+                num_frames = round((int(server['cpu_benchmark']) / total_performance) * total_frames)
+                allocated_frames += num_frames
+
+            frame_end_for_server = current_frame + num_frames - 1
+
+            if current_frame <= frame_end_for_server:
+                frame_ranges[server['hostname']] = (current_frame, frame_end_for_server)
+            current_frame = frame_end_for_server + 1
+
+        return frame_ranges
+
+    def divide_frames_equally(frame_start, frame_end, servers):
+        frame_range = frame_end - frame_start + 1
+        frames_per_server = frame_range // len(servers)
+        leftover_frames = frame_range % len(servers)
+
+        frame_ranges = {}
+        current_start = frame_start
+        for i, server in enumerate(servers):
+            current_end = current_start + frames_per_server - 1
+            if leftover_frames > 0:
+                current_end += 1
+                leftover_frames -= 1
+            if current_start <= current_end:
+                frame_ranges[server['hostname']] = (current_start, current_end)
+            current_start = current_end + 1
+
+        return frame_ranges
+
+    if len(available_servers) == 1:
+        breakdown = {available_servers[0]['hostname']: (start_frame, end_frame)}
+    else:
+        logger.debug(f'Splitting between {len(available_servers)} servers by {method} method')
+        if method == 'evenly':
+            breakdown = divide_frames_equally(start_frame, end_frame, available_servers)
+        elif method == 'cpu_benchmark':
+            breakdown = divide_frames_by_benchmark(start_frame, end_frame, available_servers)
+        elif method == 'cpu_count':
+            breakdown = divide_frames_by_cpu_count(start_frame, end_frame, available_servers)
+        else:
+            raise ValueError(f"Invalid distribution method: {method}")
+
+    server_breakdown = [server for server in available_servers if breakdown.get(server['hostname']) is not None]
+    for server in server_breakdown:
+        server['frame_range'] = breakdown[server['hostname']]
+        server['total_frames'] = breakdown[server['hostname']][-1] - breakdown[server['hostname']][0] + 1
+    return server_breakdown

src/utilities/zeroconf_server.py

@@ -1,108 +1,166 @@
 import logging
 import socket
+from typing import Dict, List, Optional
 
 from pubsub import pub
-from zeroconf import Zeroconf, ServiceInfo, ServiceBrowser, ServiceStateChange, NonUniqueNameException
+from zeroconf import Zeroconf, ServiceInfo, ServiceBrowser, ServiceStateChange, NonUniqueNameException, \
+    NotRunningException
 
 logger = logging.getLogger()
 
 
 class ZeroconfServer:
-    service_type = None
+    _default_instance: Optional['ZeroconfServer'] = None
-    server_name = None
+
-    server_port = None
+    service_type: Optional[str] = None
-    server_ip = None
+    server_name: Optional[str] = None
-    zeroconf = Zeroconf()
+    server_port: Optional[int] = None
-    service_info = None
+    properties: Dict = {}
-    client_cache = {}
+
-    properties = {}
+    def __init__(self) -> None:
+        self.service_type: Optional[str] = None
+        self.server_name: Optional[str] = None
+        self.server_port: Optional[int] = None
+        self.server_ip: Optional[str] = None
+        self.zeroconf: Zeroconf = Zeroconf()
+        self.service_info: Optional[ServiceInfo] = None
+        self.client_cache: Dict = {}
+        self.properties: Dict = {}
+
+    def _configure(self, service_type: str, server_name: str, server_port: int) -> None:
+        self.service_type = service_type
+        self.server_name = server_name
+        self.server_port = server_port
+        try:
+            socket.gethostbyname(socket.gethostname())
+        except socket.gaierror:
+            self.stop()
+
+    def _start(self, listen_only: bool = False) -> None:
+        if not self.service_type:
+            raise RuntimeError("The 'configure' method must be run before starting the zeroconf server")
+        if not listen_only:
+            logger.debug("Starting zeroconf service")
+            self._register_service()
+        else:
+            logger.debug("Starting zeroconf service - Listen only mode")
+        self._browse_services()
+
+    def _stop(self) -> None:
+        logger.debug("Stopping zeroconf service")
+        self._unregister_service()
+        if self.zeroconf:
+            self.zeroconf.close()
+
+    def _register_service(self) -> None:
+        try:
+            self.server_ip = socket.gethostbyname(socket.gethostname())
+
+            info = ServiceInfo(
+                self.service_type,
+                f"{self.server_name}.{self.service_type}",
+                addresses=[socket.inet_aton(self.server_ip)],
+                port=self.server_port,
+                properties=self.properties,
+            )
+
+            self.service_info = info
+            self.zeroconf.register_service(info)
+            logger.info(f"Registered zeroconf service: {self.service_info.name}")
+        except (NonUniqueNameException, socket.gaierror) as e:
+            logger.error(f"Error establishing zeroconf: {e}")
+
+    def _unregister_service(self) -> None:
+        if self.service_info:
+            self.zeroconf.unregister_service(self.service_info)
+            logger.info(f"Unregistered zeroconf service: {self.service_info.name}")
+            self.service_info = None
+
+    def _browse_services(self) -> None:
+        ServiceBrowser(self.zeroconf, self.service_type, [self._on_service_discovered])
+
+    def _on_service_discovered(self, zeroconf, service_type, name, state_change) -> None:
+        try:
+            info = zeroconf.get_service_info(service_type, name)
+            hostname = name.split(f'.{self.service_type}')[0]
+            logger.debug(f"Zeroconf: {hostname} {state_change}")
+            if service_type == self.service_type:
+                if state_change in (ServiceStateChange.Added, ServiceStateChange.Updated):
+                    self.client_cache[hostname] = info
+                else:
+                    self.client_cache.pop(hostname, None)
+                pub.sendMessage('zeroconf_state_change', hostname=hostname, state_change=state_change)
+        except NotRunningException:
+            pass
+
+    @classmethod
+    def _sync_class(cls) -> None:
+        if cls._default_instance is not None:
+            inst = cls._default_instance
+            cls.service_type = inst.service_type
+            cls.server_name = inst.server_name
+            cls.server_port = inst.server_port
+            cls.server_ip = inst.server_ip
+            cls.properties = inst.properties
+
+    def _found_hostnames(self) -> List[str]:
+        local_hostname = socket.gethostname()
+
+        def sort_key(hostname):
+            return False if hostname == local_hostname else True
+
+        sorted_hostnames = sorted(self.client_cache.keys(), key=sort_key)
+        return sorted_hostnames
+
+    def _get_hostname_properties(self, hostname: str) -> Dict:
+        server_info = self.client_cache.get(hostname)
+        if server_info is None:
+            return {}
+        decoded_server_info = {key.decode('utf-8'): value.decode('utf-8') for key, value in server_info.properties.items()}
+        return decoded_server_info
+
+    # --- Forwarders for backward compatibility ---
 
     @classmethod
     def configure(cls, service_type, server_name, server_port):
-        cls.service_type = service_type
+        if cls._default_instance is not None:
-        cls.server_name = server_name
+            cls._default_instance._configure(service_type, server_name, server_port)
-        cls.server_port = server_port
+            cls._sync_class()
 
     @classmethod
     def start(cls, listen_only=False):
-        if not cls.service_type:
+        if cls._default_instance is not None:
-            raise RuntimeError("The 'configure' method must be run before starting the zeroconf server")
+            cls._default_instance._start(listen_only)
-        if not listen_only:
-            cls._register_service()
-        cls._browse_services()
 
     @classmethod
     def stop(cls):
-        cls._unregister_service()
+        if cls._default_instance is not None:
-        cls.zeroconf.close()
+            cls._default_instance._stop()
-
-    @classmethod
-    def _register_service(cls):
-        try:
-            cls.server_ip = socket.gethostbyname(socket.gethostname())
-
-            info = ServiceInfo(
-                cls.service_type,
-                f"{cls.server_name}.{cls.service_type}",
-                addresses=[socket.inet_aton(cls.server_ip)],
-                port=cls.server_port,
-                properties=cls.properties,
-            )
-
-            cls.service_info = info
-            cls.zeroconf.register_service(info)
-            logger.info(f"Registered zeroconf service: {cls.service_info.name}")
-        except NonUniqueNameException as e:
-            logger.error(f"Error establishing zeroconf: {e}")
-
-    @classmethod
-    def _unregister_service(cls):
-        if cls.service_info:
-            cls.zeroconf.unregister_service(cls.service_info)
-            logger.info(f"Unregistered zeroconf service: {cls.service_info.name}")
-            cls.service_info = None
-
-    @classmethod
-    def _browse_services(cls):
-        browser = ServiceBrowser(cls.zeroconf, cls.service_type, [cls._on_service_discovered])
-        browser.is_alive()
-
-    @classmethod
-    def _on_service_discovered(cls, zeroconf, service_type, name, state_change):
-        info = zeroconf.get_service_info(service_type, name)
-        logger.debug(f"Zeroconf: {name} {state_change}")
-        if service_type == cls.service_type:
-            if state_change == ServiceStateChange.Added or state_change == ServiceStateChange.Updated:
-                cls.client_cache[name] = info
-            else:
-                cls.client_cache.pop(name)
-            pub.sendMessage('zeroconf_state_change', hostname=name, state_change=state_change, info=info)
 
     @classmethod
     def found_hostnames(cls):
-        fetched_hostnames = [x.split(f'.{cls.service_type}')[0] for x in cls.client_cache.keys()]
+        if cls._default_instance is not None:
-        local_hostname = socket.gethostname()
+            return cls._default_instance._found_hostnames()
-        # Define a sort key function
+        return []
-        def sort_key(hostname):
-            # Return 0 if it's the local hostname so it comes first, else return 1
-            return False if hostname == local_hostname else True
-
-        # Sort the list with the local hostname first
-        sorted_hostnames = sorted(fetched_hostnames, key=sort_key)
-        return sorted_hostnames
 
     @classmethod
     def get_hostname_properties(cls, hostname):
-        new_key = hostname + '.' + cls.service_type
+        if cls._default_instance is not None:
-        server_info = cls.client_cache.get(new_key).properties
+            return cls._default_instance._get_hostname_properties(hostname)
-        decoded_server_info = {key.decode('utf-8'): value.decode('utf-8') for key, value in server_info.items()}
+        return {}
-        return decoded_server_info
+
 
 # Example usage:
 if __name__ == "__main__":
+    import time
+
+    logging.basicConfig(level=logging.DEBUG)
     ZeroconfServer.configure("_zordon._tcp.local.", "foobar.local", 8080)
     try:
         ZeroconfServer.start()
-        input("Server running - Press enter to end")
+        while True:
+            time.sleep(0.1)
+    except KeyboardInterrupt:
+        pass
     finally:
         ZeroconfServer.stop()

src/version.py

@@ -0,0 +1,8 @@
+APP_NAME = "Zordon"
+APP_VERSION = "0.8.0"
+APP_AUTHOR = "Brett Williams"
+APP_DESCRIPTION = "Distributed Render Farm Tools"
+APP_COPYRIGHT_YEAR = "2026"
+APP_LICENSE = "MIT License"
+APP_REPO_NAME = APP_NAME
+APP_REPO_OWNER = "blw1138"

src/web/static/js/job_table.js

@@ -1,64 +0,0 @@
-const grid = new gridjs.Grid({
-columns: [
-  { data: (row) => row.id,
-  name: 'Thumbnail',
-  formatter: (cell) => gridjs.html(`<img src="/api/job/${cell}/thumbnail?video_ok" style='width: 200px; min-width: 120px;'>`),
-  sort: {enabled: false}
-  },
-  { id: 'name',
-  name: 'Name',
-  data: (row) => row.name,
-  formatter: (name, row) => gridjs.html(`<a href="/ui/job/${row.cells[0].data}/full_details">${name}</a>`)
-   },
-  { id: 'renderer', data: (row) => `${row.renderer}-${row.renderer_version}`, name: 'Renderer' },
-  { id: 'priority', name: 'Priority' },
-  { id: 'status',
-    name: 'Status',
-    data: (row) => row,
-    formatter: (cell, row) => gridjs.html(`
-        <span class="tag ${(cell.status == 'running') ? 'is-hidden' : ''} ${(cell.status == 'cancelled') ?
-        'is-warning' : (cell.status == 'error') ? 'is-danger' : (cell.status == 'not_started') ?
-        'is-light' : 'is-primary'}">${cell.status}</span>
-        <progress class="progress is-primary ${(cell.status != 'running') ? 'is-hidden': ''}"
-        value="${(parseFloat(cell.percent_complete) * 100.0)}" max="100">${cell.status}</progress>
-    `)},
-  { id: 'time_elapsed', name: 'Time Elapsed' },
-  { data: (row) => row.total_frames ?? 'N/A', name: 'Frame Count' },
-  { id: 'client', name: 'Client'},
-  { data: (row) => row.last_output ?? 'N/A',
-    name: 'Last Output',
-    formatter: (output, row) => gridjs.html(`<a href="/api/job/${row.cells[0].data}/logs">${output}</a>`)
-  },
-  { data: (row) => row,
-    name: 'Commands',
-    formatter: (cell, row) => gridjs.html(`
-        <div class="field has-addons" style='white-space: nowrap; display: inline-block;'>
-            <button class="button is-info" onclick="window.location.href='/ui/job/${row.cells[0].data}/full_details';">
-            <span class="icon"><i class="fa-solid fa-info"></i></span>
-            </button>
-            <button class="button is-link" onclick="window.location.href='/api/job/${row.cells[0].data}/logs';">
-            <span class="icon"><i class="fa-regular fa-file-lines"></i></span>
-            </button>
-            <button class="button is-warning is-active ${(cell.status != 'running') ? 'is-hidden': ''}" onclick="window.location.href='/api/job/${row.cells[0].data}/cancel?confirm=True&redirect=True';">
-            <span class="icon"><i class="fa-solid fa-x"></i></span>
-            </button>
-            <button class="button is-success ${(cell.status != 'completed') ? 'is-hidden': ''}" onclick="window.location.href='/api/job/${row.cells[0].data}/download_all';">
-            <span class="icon"><i class="fa-solid fa-download"></i></span>
-            <span>${cell.file_count}</span>
-            </button>
-            <button class="button is-danger" onclick="window.location.href='/api/job/${row.cells[0].data}/delete?confirm=True&redirect=True'">
-            <span class="icon"><i class="fa-regular fa-trash-can"></i></span>
-            </button>
-        </div>
-        `),
-    sort: false
-  },
-  { id: 'owner', name: 'Owner' }
-],
-autoWidth: true,
-server: {
-  url: '/api/jobs',
-  then: results => results['jobs'],
-},
-sort: true,
-}).render(document.getElementById('table'));

src/web/static/js/modals.js

@@ -1,44 +0,0 @@
-document.addEventListener('DOMContentLoaded', () => {
-  // Functions to open and close a modal
-  function openModal($el) {
-    $el.classList.add('is-active');
-  }
-
-  function closeModal($el) {
-    $el.classList.remove('is-active');
-  }
-
-  function closeAllModals() {
-    (document.querySelectorAll('.modal') || []).forEach(($modal) => {
-      closeModal($modal);
-    });
-  }
-
-  // Add a click event on buttons to open a specific modal
-  (document.querySelectorAll('.js-modal-trigger') || []).forEach(($trigger) => {
-    const modal = $trigger.dataset.target;
-    const $target = document.getElementById(modal);
-
-    $trigger.addEventListener('click', () => {
-      openModal($target);
-    });
-  });
-
-  // Add a click event on various child elements to close the parent modal
-  (document.querySelectorAll('.modal-background, .modal-close, .modal-card-head .delete, .modal-card-foot .button') || []).forEach(($close) => {
-    const $target = $close.closest('.modal');
-
-    $close.addEventListener('click', () => {
-      closeModal($target);
-    });
-  });
-
-  // Add a keyboard event to close all modals
-  document.addEventListener('keydown', (event) => {
-    const e = event || window.event;
-
-    if (e.keyCode === 27) { // Escape key
-      closeAllModals();
-    }
-  });
-});

src/web/templates/details.html

@@ -1,48 +0,0 @@
-{% extends 'layout.html' %}
-
-{% block body %}
-<div class="container" style="text-align:center; width: 100%">
-<br>
-  {% if media_url: %}
-    <video width="1280" height="720" controls>
-    <source src="{{media_url}}" type="video/mp4">
-    Your browser does not support the video tag.
-    </video>
-  {% elif job_status == 'Running': %}
-    <div style="width: 100%; height: 720px; position: relative; background: black; text-align: center; color: white;">
-      <img src="/static/images/gears.png" style="vertical-align: middle; width: auto; height: auto; position:absolute; margin: auto; top: 0; bottom: 0; left: 0; right: 0;">
-        <span style="height: auto; position:absolute; margin: auto; top: 58%; left: 0; right: 0; color: white; width: 60%">
-          <progress class="progress is-primary" value="{{job.worker_data()['percent_complete'] * 100}}" max="100" style="margin-top: 6px;" id="progress-bar">Rendering</progress>
-          Rendering in Progress - <span id="percent-complete">{{(job.worker_data()['percent_complete'] * 100) | int}}%</span>
-          <br>Time Elapsed: <span id="time-elapsed">{{job.worker_data()['time_elapsed']}}</span>
-        </span>
-      <script>
-      var startingStatus = '{{job.status.value}}';
-      function update_job() {
-        $.getJSON('/api/job/{{job.id}}', function(data) {
-          document.getElementById('progress-bar').value = (data.percent_complete * 100);
-          document.getElementById('percent-complete').innerHTML = (data.percent_complete * 100).toFixed(0) + '%';
-          document.getElementById('time-elapsed').innerHTML = data.time_elapsed;
-          if (data.status != startingStatus){
-            clearInterval(renderingTimer);
-            window.location.reload(true);
-          };
-        });
-      }
-      if (startingStatus == 'running'){
-        var renderingTimer = setInterval(update_job, 1000);
-      };
-    </script>
-    </div>
-  {% else %}
-    <div style="width: 100%; height: 720px; position: relative; background: black;">
-      <img src="/static/images/{{job_status}}.png" style="vertical-align: middle; width: auto; height: auto; position:absolute; margin: auto; top: 0; bottom: 0; left: 0; right: 0;">
-      <span style="height: auto; position:absolute; margin: auto; top: 58%; left: 0; right: 0; color: white;">
-        {{job_status}}
-      </span>
-    </div>
-  {% endif %}
-  <br>
-  {{detail_table|safe}}
-</div>
-{% endblock %}

src/web/templates/index.html

@@ -1,8 +0,0 @@
-{% extends 'layout.html' %}
-
-{% block body %}
-<div class="container is-fluid" style="padding-top: 20px;">
-  <div id="table" class="table"></div>
-</div>
-<script src="/static/js/job_table.js"></script>
-{% endblock %}

src/web/templates/layout.html

@@ -1,236 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Zordon Dashboard</title>
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.9.4/css/bulma.min.css">
-  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
-  <script src="https://cdn.jsdelivr.net/npm/jquery/dist/jquery.min.js"></script>
-  <script src="https://cdn.jsdelivr.net/npm/gridjs/dist/gridjs.umd.js"></script>
-  <link href="https://unpkg.com/gridjs/dist/theme/mermaid.min.css" rel="stylesheet" />
-  <script src="https://kit.fontawesome.com/698705d14d.js" crossorigin="anonymous"></script>
-  <script type="text/javascript" src="/static/js/modals.js"></script>
-</head>
-<body onload="rendererChanged(document.getElementById('renderer'))">
-
-<nav class="navbar is-dark" role="navigation" aria-label="main navigation">
-  <div class="navbar-brand">
-    <a class="navbar-item" href="/">
-      <img src="/static/images/logo.png">
-    </a>
-  </div>
-
-  <div id="navbarBasicExample" class="navbar-menu">
-    <div class="navbar-start">
-      <a class="navbar-item" href="/">
-        Home
-      </a>
-    </div>
-
-    <div class="navbar-end">
-      <div class="navbar-item">
-        <button class="button is-primary js-modal-trigger" data-target="add-job-modal">
-          <span class="icon">
-            <i class="fa-solid fa-upload"></i>
-          </span>
-        <span>Submit Job</span>
-        </button>
-      </div>
-    </div>
-  </div>
-</nav>
-
-{% block body %}
-{% endblock %}
-
-<div id="add-job-modal" class="modal">
-  <!--   Start Add Form   -->
-  <form id="submit_job" action="/api/add_job?redirect=True" method="POST" enctype="multipart/form-data">
-    <div class="modal-background"></div>
-    <div class="modal-card">
-      <header class="modal-card-head">
-        <p class="modal-card-title">Submit New Job</p>
-        <button class="delete" aria-label="close" type="button"></button>
-      </header>
-      <section class="modal-card-body">
-        <!--   File Uploader   -->
-
-        <label class="label">Upload File</label>
-        <div id="file-uploader" class="file has-name is-fullwidth">
-          <label class="file-label">
-            <input class="file-input is-small" type="file" name="file">
-            <span class="file-cta">
-            <span class="file-icon">
-              <i class="fas fa-upload"></i>
-            </span>
-            <span class="file-label">
-              Choose a file…
-            </span>
-          </span>
-            <span class="file-name">
-            No File Uploaded
-          </span>
-          </label>
-        </div>
-        <br>
-        <script>
-    const fileInput = document.querySelector('#file-uploader input[type=file]');
-    fileInput.onchange = () => {
-      if (fileInput.files.length > 0) {
-        const fileName = document.querySelector('#file-uploader .file-name');
-        fileName.textContent = fileInput.files[0].name;
-      }
-    }
-
-    const presets = {
-      {% for preset in preset_list: %}
-        {{preset}}: {
-        name: '{{preset_list[preset]['name']}}',
-        renderer: '{{preset_list[preset]['renderer']}}',
-        args: '{{preset_list[preset]['args']}}',
-        },
-      {% endfor %}
-    };
-
-    function rendererChanged(ddl1) {
-
-        var renderers = {
-        {% for renderer in renderer_info: %}
-          {% if renderer_info[renderer]['supported_export_formats']: %}
-          {{renderer}}: [
-            {% for format in renderer_info[renderer]['supported_export_formats']: %}
-            '{{format}}',
-            {% endfor %}
-            ],
-            {% endif %}
-        {% endfor %}
-        };
-
-        var selectedRenderer = ddl1.value;
-
-        var ddl3 = document.getElementById('preset_list');
-        ddl3.options.length = 0;
-        createOption(ddl3, '-Presets-', '');
-        for (var preset_name in presets) {
-          if (presets[preset_name]['renderer'] == selectedRenderer) {
-            createOption(ddl3, presets[preset_name]['name'], preset_name);
-           };
-        };
-        document.getElementById('raw_args').value = "";
-
-        var ddl2 = document.getElementById('export_format');
-        ddl2.options.length = 0;
-        var options = renderers[selectedRenderer];
-        for (i = 0; i < options.length; i++) {
-          createOption(ddl2, options[i], options[i]);
-        };
-      }
-
-      function createOption(ddl, text, value) {
-        var opt = document.createElement('option');
-        opt.value = value;
-        opt.text = text;
-        ddl.options.add(opt);
-      }
-
-      function addPresetTextToInput(presetfield, textfield) {
-        var p = presets[presetfield.value];
-        textfield.value = p['args'];
-      }
-
-      </script>
-
-        <!--   Renderer & Priority   -->
-        <div class="field is-grouped">
-          <p class="control">
-            <label class="label">Renderer</label>
-            <span class="select">
-              <select id="renderer" name="renderer" onchange="rendererChanged(this)">
-                {% for renderer in renderer_info: %}
-                <option name="renderer" value="{{renderer}}">{{renderer}}</option>
-                {% endfor %}
-              </select>
-            </span>
-          </p>
-          <p class="control">
-            <label class="label">Client</label>
-            <span class="select">
-              <select name="client">
-                <option name="client" value="">First Available</option>
-                  {% for client in render_clients: %}
-                <option name="client" value="{{client}}">{{client}}</option>
-                  {% endfor %}
-              </select>
-            </span>
-          </p>
-          <p class="control">
-            <label class="label">Priority</label>
-            <span class="select">
-              <select name="priority">
-              <option name="priority" value="1">1</option>
-              <option name="priority" value="2" selected="selected">2</option>
-              <option name="priority" value="3">3</option>
-              </select>
-            </span>
-          </p>
-        </div>
-
-        <!--   Output Path   -->
-        <label class="label">Output</label>
-        <div class="field has-addons">
-          <div class="control is-expanded">
-            <input class="input is-small" type="text" placeholder="Output Name" name="output_path" value="output.mp4">
-          </div>
-          <p class="control">
-        <span class="select is-small">
-          <select id="export_format" name="export_format">
-            <option value="ar">option</option>
-          </select>
-        </span>
-          </p>
-        </div>
-
-        <!--   Resolution     -->
-<!--        <label class="label">Resolution</label>-->
-<!--        <div class="field is-grouped">-->
-<!--          <p class="control">-->
-<!--            <input class="input" type="text" placeholder="auto" maxlength="5" size="8" name="AnyRenderer-arg_x_resolution">-->
-<!--          </p>-->
-<!--          <label class="label"> x </label>-->
-<!--          <p class="control">-->
-<!--            <input class="input" type="text" placeholder="auto" maxlength="5" size="8" name="AnyRenderer-arg_y_resolution">-->
-<!--          </p>-->
-<!--          <label class="label"> @ </label>-->
-<!--          <p class="control">-->
-<!--            <input class="input" type="text" placeholder="auto" maxlength="3" size="5" name="AnyRenderer-arg_frame_rate">-->
-<!--          </p>-->
-<!--          <label class="label"> fps </label>-->
-<!--        </div>-->
-
-        <label class="label">Command Line Arguments</label>
-        <div class="field has-addons">
-          <p class="control">
-            <span class="select is-small">
-              <select id="preset_list" onchange="addPresetTextToInput(this, document.getElementById('raw_args'))">
-                <option value="preset-placeholder">presets</option>
-              </select>
-            </span>
-          </p>
-          <p class="control is-expanded">
-            <input class="input is-small" type="text" placeholder="Args" id="raw_args" name="raw_args">
-          </p>
-        </div>
-
-        <!--   End Add Form   -->
-      </section>
-      <footer class="modal-card-foot">
-        <input class="button is-link" type="submit"/>
-        <button class="button" type="button">Cancel</button>
-      </footer>
-    </div>
-  </form>
-</div>
-
-</body>
-</html>

src/web/templates/upload.html

@@ -1,62 +0,0 @@
-<html>
-<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
-<script>
-    $(function() {
-  $('#renderer').change(function() {
-    $('.render_settings').hide();
-    $('#' + $(this).val()).show();
-  });
-});
-
-
-</script>
-<body>
-<h3>Upload a file</h3>
-
-<div>
-    <form action="/add_job" method="POST"
-          enctype="multipart/form-data">
-        <div>
-            <input type="file" name="file"/><br>
-        </div>
-
-        <input type="hidden" id="origin" name="origin" value="html">
-
-        <div id="client">
-            Render Client:
-            <select name="client">
-                {% for client in render_clients %}
-                <option value="{{client}}">{{client}}</option>
-                {% endfor %}
-            </select>
-        </div>
-        <div id="priority">
-            Priority:
-            <select name="priority">
-                <option value="1">1</option>
-                <option value="2" selected>2</option>
-                <option value="3">3</option>
-            </select>
-        </div>
-        <div>
-            <label for="renderer">Renderer:</label>
-            <select id="renderer" name="renderer">
-                {% for renderer in supported_renderers %}
-                <option value="{{renderer}}">{{renderer}}</option>
-                {% endfor %}
-            </select>
-        </div>
-        <div id="blender" class="render_settings" style="display:none">
-            Engine:
-            <select name="blender+engine">
-                <option value="CYCLES">Cycles</option>
-                <option value="BLENDER_EEVEE">Eevee</option>
-            </select>
-        </div>
-        <br>
-
-        <input type="submit"/>
-    </form>
-</div>
-</body>
-</html>