Refactor and reorganize code. Split server into manager and server files.

dashboard.py

@@ -17,8 +17,8 @@ from rich.table import Table
 from rich.text import Text
 from rich.tree import Tree
 
-import zordon_server
+from utilities.render_worker import RenderStatus, string_to_status
-from zordon_server import RenderStatus, string_to_status
+from zordon_server import start_server
 
 """
 The RenderDashboard is designed to be run on a remote machine or on the local server
@@ -235,10 +235,10 @@ if __name__ == '__main__':
 
     if not client.connect():
         if client.server_ip == local_hostname:
-            start_server = input("Local server not running. Start server? (y/n) ")
+            start_server_input = input("Local server not running. Start server? (y/n) ")
-            if start_server and start_server[0].lower() == "y":
+            if start_server_input and start_server_input[0].lower() == "y":
                 # Startup the local server
-                zordon_server.RenderServer.start(background_thread=True)
+                start_server(background_thread=True)
                 test = client.connect()
                 print(f"connected? {test}")
         else:

lib/render_job.py

@@ -0,0 +1,70 @@
+import json
+import logging
+import os
+import uuid
+from datetime import datetime
+
+from utilities.render_worker import RenderStatus
+
+logger = logging.getLogger()
+
+
+class RenderJob:
+
+    def __init__(self, render, priority=2, owner=None, client=None, notify=None, custom_id=None):
+        self.id = custom_id or self.generate_id()
+        self.owner = owner
+        self.render = render
+        self.priority = priority
+        self.client = client
+        self.notify = notify
+        self.date_created = datetime.now()
+        self.scheduled_start = None
+        self.renderer = render.renderer
+        self.name = os.path.basename(render.input) + '_' + self.date_created.isoformat()
+        self.archived = False
+
+    def render_status(self):
+        """Returns status of render job"""
+        try:
+            if self.scheduled_start and self.render.status == RenderStatus.NOT_STARTED:
+                return RenderStatus.SCHEDULED
+            else:
+                return self.render.status
+        except Exception as e:
+            logger.warning("render_status error: {}".format(e))
+            return RenderStatus.ERROR
+
+    def json(self):
+        """Converts RenderJob into JSON format"""
+        import numbers
+
+        def date_serializer(o):
+            if isinstance(o, datetime):
+                return o.isoformat()
+
+        json_string = ''
+
+        try:
+            d = self.__dict__.copy()
+            d['status'] = self.render_status().value
+            d['render'] = self.render.__dict__.copy()
+            for key in ['thread', 'process']:  # remove unwanted keys from JSON
+                d['render'].pop(key, None)
+            d['render']['status'] = d['status']
+
+            # jobs from current_session generate percent completed
+            # jobs after loading server pull in a saved value. Have to check if callable object or not
+
+            percent_complete = self.render.percent_complete if isinstance(self.render.percent_complete, numbers.Number) \
+                else self.render.percent_complete()
+            d['render']['percent_complete'] = percent_complete
+
+            json_string = json.dumps(d, default=date_serializer)
+        except Exception as e:
+            logger.error("Error converting to JSON: {}".format(e))
+        return json_string
+
+    @classmethod
+    def generate_id(cls):
+        return str(uuid.uuid4()).split('-')[0]

lib/render_manager.py

@@ -0,0 +1,255 @@
+import json
+import logging
+import os
+import platform
+from datetime import datetime
+
+import psutil
+import requests
+
+from lib.render_job import RenderJob
+from utilities.render_worker import RenderWorkerFactory, RenderStatus
+
+logger = logging.getLogger()
+
+JSON_FILE = 'server_state.json'
+#todo: move history to sqlite db
+
+
+class RenderManager:
+    render_queue = []
+    render_clients = []
+    maximum_renderer_instances = {'Blender': 2, 'After Effects': 1, 'ffmpeg': 4}
+    host_name = None
+    port = 8080
+    client_mode = False
+    server_hostname = None
+
+    last_saved_counts = {}
+
+    def __init__(self):
+        pass
+
+    @classmethod
+    def add_to_render_queue(cls, render_job, force_start=False, client=None):
+
+        if not client or render_job.client == cls.host_name:
+            logger.debug('Adding priority {} job to render queue: {}'.format(render_job.priority, render_job.render))
+            render_job.client = cls.host_name
+            cls.render_queue.append(render_job)
+            if force_start:
+                cls.start_job(render_job)
+            else:
+                cls.evaluate_queue()
+        else:
+            # todo: implement client rendering
+            logger.warning('remote client rendering not implemented yet')
+
+    @classmethod
+    def running_jobs(cls):
+        return cls.jobs_with_status(RenderStatus.RUNNING)
+
+    @classmethod
+    def pending_jobs(cls):
+        pending_jobs = cls.jobs_with_status(RenderStatus.NOT_STARTED)
+        pending_jobs.extend(cls.jobs_with_status(RenderStatus.SCHEDULED))
+        return pending_jobs
+
+    @classmethod
+    def jobs_with_status(cls, status, priority_sorted=False, include_archived=True):
+        found_jobs = [x for x in cls.render_queue if x.render_status() == status]
+        if not include_archived:
+            found_jobs = [x for x in found_jobs if not x.archived]
+        if priority_sorted:
+            found_jobs = sorted(found_jobs, key=lambda a: a.priority, reverse=False)
+        return found_jobs
+
+    @classmethod
+    def job_with_id(cls, job_id):
+        found_job = next((x for x in cls.render_queue if x.id == job_id), None)
+        return found_job
+
+    @classmethod
+    def clear_history(cls):
+        to_remove = [x for x in cls.render_queue if x.render_status() in [RenderStatus.CANCELLED,
+                                                                          RenderStatus.COMPLETED, RenderStatus.ERROR]]
+        for x in to_remove:
+            x.archived = True
+        cls.save_state()
+
+    @classmethod
+    def load_state(cls, json_path=None):
+        """Load state history from JSON file"""
+
+        input_path = json_path or JSON_FILE
+        if os.path.exists(input_path):
+            with open(input_path) as f:
+
+                # load saved data
+                saved_state = json.load(f)
+                cls.render_clients = saved_state.get('clients', {})
+
+                for job in saved_state.get('jobs', []):
+
+                    # Identify renderer type and recreate Renderer object
+                    job_render_object = RenderWorkerFactory.create_worker(job['renderer'], input_path=job['render']['input'], output_path=job['render']['output'])
+
+                    # Load Renderer values
+                    for key, val in job['render'].items():
+                        if val and key in ['start_time', 'end_time']:  # convert date strings back into date objects
+                            job_render_object.__dict__[key] = datetime.fromisoformat(val)
+                        else:
+                            job_render_object.__dict__[key] = val
+
+                    job_render_object.status = RenderStatus[job['status'].upper()]
+                    job.pop('render', None)
+
+                    # Create RenderJob with re-created Renderer object
+                    new_job = RenderJob(job_render_object, job['priority'], job['client'])
+                    for key, val in job.items():
+                        if key in ['date_created']:  # convert date strings back to datetime objects
+                            new_job.__dict__[key] = datetime.fromisoformat(val)
+                        else:
+                            new_job.__dict__[key] = val
+                    new_job.__delattr__('status')
+
+                    # Handle older loaded jobs that were cancelled before closing
+                    if new_job.render_status() == RenderStatus.RUNNING:
+                        new_job.render.status = RenderStatus.CANCELLED
+
+                    # finally add back to render queue
+                    cls.render_queue.append(new_job)
+
+                cls.last_saved_counts = cls.job_counts()
+
+    @classmethod
+    def save_state(cls, json_path=None):
+        """Save state history to JSON file"""
+        try:
+            logger.debug("Saving Render History")
+            output = {'timestamp': datetime.now().isoformat(),
+                      'jobs': [json.loads(j.json()) for j in cls.render_queue],
+                      'clients': cls.render_clients}
+            output_path = json_path or JSON_FILE
+            with open(output_path, 'w') as f:
+                json.dump(output, f, indent=4)
+            cls.last_saved_counts = cls.job_counts()
+        except Exception as e:
+            logger.error("Error saving state JSON: {}".format(e))
+
+    @classmethod
+    def evaluate_queue(cls):
+
+        instances = cls.renderer_instances()
+
+        not_started = cls.jobs_with_status(RenderStatus.NOT_STARTED, priority_sorted=True)
+        if not_started:
+            for job in not_started:
+                renderer = job.render.renderer
+                higher_priority_jobs = [x for x in cls.running_jobs() if x.priority < job.priority]
+                max_renderers = renderer in instances.keys() and instances[
+                    renderer] >= cls.maximum_renderer_instances.get(renderer, 1)
+
+                if not max_renderers and not higher_priority_jobs:
+                    cls.start_job(job)
+
+        scheduled = cls.jobs_with_status(RenderStatus.SCHEDULED, priority_sorted=True)
+        for job in scheduled:
+            if job.scheduled_start <= datetime.now():
+                cls.start_job(job)
+
+        if cls.last_saved_counts != cls.job_counts():
+            cls.save_state()
+
+    @classmethod
+    def start_job(cls, job):
+        logger.info('Starting {}render: {} - Priority {}'.format('scheduled ' if job.scheduled_start else '', job.name,
+                                                                  job.priority))
+        job.render.start()
+
+    @classmethod
+    def cancel_job(cls, job):
+        logger.info('Cancelling job ID: {}'.format(job.id))
+        if job.render_status() in [RenderStatus.NOT_STARTED, RenderStatus.RUNNING, RenderStatus.ERROR]:
+            job.render.stop()
+            job.render.status = RenderStatus.CANCELLED
+            return True
+        return False
+
+    @classmethod
+    def renderer_instances(cls):
+        from collections import Counter
+        all_instances = [x.render.renderer for x in cls.running_jobs()]
+        return Counter(all_instances)
+
+    @classmethod
+    def job_counts(cls):
+        job_counts = {}
+        for job_status in RenderStatus:
+            job_counts[job_status.value] = len(cls.jobs_with_status(job_status))
+
+        return job_counts
+
+    @classmethod
+    def status(cls):
+
+        stats = {"timestamp": datetime.now().isoformat(),
+                 "platform": platform.platform(),
+                 "cpu_percent": psutil.cpu_percent(percpu=False),
+                 "cpu_percent_per_cpu": psutil.cpu_percent(percpu=True),
+                 "cpu_count": psutil.cpu_count(),
+                 "memory_total": psutil.virtual_memory().total,
+                 "memory_available": psutil.virtual_memory().available,
+                 "memory_percent": psutil.virtual_memory().percent,
+                 "job_counts": cls.job_counts(),
+                 "host_name": cls.host_name
+                 }
+
+        return stats
+
+    @classmethod
+    def all_jobs(cls):
+        all_jobs = [x for x in cls.render_queue if not x.archived]
+        return all_jobs
+
+    @classmethod
+    def register_client(cls, hostname):
+
+        #todo: check to make sure not adding ourselves
+
+        success = False
+
+        if hostname in cls.render_clients:
+            logger.warning(f"Client '{hostname}' already registered")
+            return success
+
+        try:
+            response = requests.get(f"http://{hostname}:8080/status", timeout=3)
+            if response.ok:
+                cls.render_clients.append(hostname)
+                logger.info(f"Client '{hostname}' successfully registered")
+                success = True
+                cls.save_state()
+        except requests.ConnectionError as e:
+            logger.error(f"Cannot connect to client at hostname: {hostname}")
+        return success
+
+    @classmethod
+    def unregister_client(cls, hostname):
+        success = False
+        if hostname in cls.render_clients and hostname != cls.host_name:
+            cls.render_clients.remove(hostname)
+            logger.info(f"Client '{hostname}' successfully unregistered")
+            success = True
+        return success
+
+    @staticmethod
+    def is_client_available(client_hostname, timeout=3):
+        try:
+            response = requests.get(f"http://{client_hostname}:8080/status", timeout=timeout)
+            if response.ok:
+                return True
+        except requests.ConnectionError as e:
+            pass
+        return False
+

server.py

@@ -0,0 +1,293 @@
+#!/usr/bin/env python3
+
+import json
+import logging
+import os
+import socket
+import threading
+import time
+from datetime import datetime
+
+import requests
+import yaml
+from flask import Flask, jsonify, request, render_template
+from werkzeug.utils import secure_filename
+
+from lib.render_job import RenderJob
+from lib.render_manager import RenderManager
+from utilities.render_worker import RenderWorkerFactory, string_to_status
+
+logger = logging.getLogger()
+app = Flask(__name__)
+
+
+@app.get('/jobs')
+def jobs_json():
+    return [json.loads(x.json()) for x in RenderManager.render_queue if not x.archived]
+
+
+@app.get('/jobs/<status_val>')
+def filtered_jobs_json(status_val):
+    state = string_to_status(status_val)
+    jobs = [json.loads(x.json()) for x in RenderManager.jobs_with_status(state)]
+    if jobs:
+        return jobs
+    else:
+        return {'error', f'Cannot find jobs with status {status_val}'}, 400
+
+
+@app.get('/job_status/<job_id>')
+def get_job_status(job_id):
+    found_job = RenderManager.job_with_id(job_id)
+    if found_job:
+        logger.info("Founbd jobs")
+        return found_job.json()
+    else:
+        return {'error': f'Cannot find job with ID {job_id}'}, 400
+
+
+@app.post('/register_client')
+def register_client():
+    client_hostname = request.values['hostname']
+    x = RenderManager.register_client(client_hostname)
+    return "Success" if x else "Fail"
+
+
+@app.post('/unregister_client')
+def unregister_client():
+    client_hostname = request.values['hostname']
+    x = RenderManager.unregister_client(client_hostname)
+    return "Success" if x else "Fail"
+
+
+@app.get('/full_status')
+def full_status():
+    full_results = {'timestamp': datetime.now().isoformat(), 'servers': {}}
+
+    try:
+        for client_hostname in RenderManager.render_clients:
+            is_online = False
+            if client_hostname == RenderManager.host_name:
+                snapshot_results = snapshot()
+                is_online = True
+            else:
+                snapshot_results = {}
+                try:
+                    snapshot_request = requests.get(f'http://{client_hostname}:8080/snapshot', timeout=1)
+                    snapshot_results = snapshot_request.json()
+                    is_online = snapshot_request.ok
+                except requests.ConnectionError as e:
+                    pass
+            server_data = {'status': snapshot_results.get('status', {}), 'jobs': snapshot_results.get('jobs', {}),
+                           'is_online': is_online}
+            full_results['servers'][client_hostname] = server_data
+    except Exception as e:
+        logger.error(f"Exception fetching full status: {e}")
+
+    return full_results
+
+
+@app.get('/snapshot')
+def snapshot():
+    server_status = RenderManager.status()
+    server_jobs = [json.loads(x.json()) for x in RenderManager.render_queue if not x.archived]
+    server_data = {'status': server_status, 'jobs': server_jobs, 'timestamp': datetime.now().isoformat()}
+    return server_data
+
+
+@app.post('/add_job')
+def add_job():
+    """Create new job and add to server render queue"""
+    renderer = request.json.get("renderer", None)
+    input_path = request.json.get("input", None)
+    output_path = request.json.get("output", None)
+    priority = request.json.get('priority', 2)
+    args = request.json.get('args', None)
+    client = request.json.get('client', RenderManager.host_name)
+    force_start = request.json.get('force_start', False)
+
+    if None in [renderer, input_path, output_path]:
+        return {'error': 'missing required parameters'}, 400
+
+    if client == RenderManager.host_name:
+        logger.info(f"Creating job locally - {input_path}")
+        # Local Renders
+        try:
+            render_job = RenderWorkerFactory.create_worker(renderer, input_path, output_path, args)
+        except ValueError as e:
+            logger.exception(e)
+            return {'error': str(e)}, 400
+
+        new_job = RenderJob(render_job, priority=priority)
+        RenderManager.add_to_render_queue(new_job, force_start=force_start)
+
+        return new_job.json()
+
+    elif client in RenderManager.render_clients:
+
+        # see if host is available
+        if RenderManager.is_client_available(client):
+
+            if args and renderer == 'blender' and args.get('pack_files', False):
+                from utilities.blender_worker import pack_blender_files
+                new_path = pack_blender_files(path=input_path)
+                if new_path:
+                    logger.info(f'Packed Blender file successfully: {new_path}')
+                    input_path = new_path
+                else:
+                    err_msg = f'Failed to pack Blender file: {input_path}'
+                    logger.error(err_msg)
+                    return {'error': err_msg}, 400
+
+            # call uploader on remote client
+            try:
+                job_files = {'file': open(input_path, 'rb')}
+                job_data = request.json
+                job_data['input'] = input_path
+                logger.info(f"Uploading file {input_path} to client {client}")
+                response = requests.post(f"http://{client}:8080/uploader", files=job_files, data=job_data)
+                if response.ok:
+                    logger.info("Job submitted successfully!")
+                    return response.json() if response.json() else "Job ok"
+                else:
+                    return {'error', 'Job rejected by client'}, 400
+            except requests.ConnectionError as e:
+                err_msg = f"Error submitting job to client: {client}"
+                logger.error(err_msg)
+                return {'error', err_msg}, 400
+        else:
+            # client is not available
+            err_msg = f"Render client '{client}' is unreachable"
+            logger.error(err_msg)
+            return {'error', err_msg}, 400
+
+    else:
+        err_msg = f"Unknown render client: '{client}'"
+        logger.error(err_msg)
+        return {'error', err_msg}, 400
+
+
+@app.get('/cancel_job')
+def cancel_job():
+    job_id = request.args.get('id', None)
+    confirm = request.args.get('confirm', False)
+    if not job_id:
+        return {'error': 'job id not found'}, 400
+    elif not confirm:
+        return {'error': 'confirmation required'}, 400
+    else:
+        found = [x for x in RenderManager.render_queue if x.id == job_id]
+        if len(found) > 1:
+            # logger.error('Multiple jobs found for ID {}'.format(job_id))
+            return jsonify({'error': 'multiple jobs found for ID {}'.format(job_id)})
+        elif found:
+            success = RenderManager.cancel_job(found[0])
+            return jsonify({'result': success})
+    return {'error': 'job not found'}, 400
+
+
+@app.get('/clear_history')
+def clear_history():
+    RenderManager.clear_history()
+    return {'result': True}
+
+
+@app.route('/status')
+def status():
+    return RenderManager.status()
+
+
+@app.route('/')
+def default():
+    return "Server running"
+
+
+@app.route('/upload')
+def upload_file_page():
+    return render_template('upload.html')
+
+
+@app.route('/uploader', methods=['POST'])
+def upload_file():
+    if request.method == 'POST':
+        try:
+
+            uploaded_file = request.files['file']
+            if not uploaded_file.filename:
+                return {'error': 'no file uploaded'}
+
+            # generate directory to use
+            logger.debug(f"Receiving uploaded file {uploaded_file.filename}")
+            new_id = RenderJob.generate_id()
+            job_dir = os.path.join(app.config['UPLOAD_FOLDER'], new_id + "-" + uploaded_file.filename)
+            if not os.path.exists(job_dir):
+                os.makedirs(job_dir)
+
+            local_path = os.path.join(job_dir, secure_filename(uploaded_file.filename))
+            uploaded_file.save(local_path)
+            renderer = request.values['renderer']
+
+            # todo: finish output_path - currently placeholder data
+            output_path = os.path.join(job_dir, uploaded_file.filename + "-output.mp4")
+
+            try:
+                render_job = RenderWorkerFactory.create_worker(renderer, local_path, output_path,
+                                                               args=request.values.get('args', None))
+                new_job = RenderJob(render_job, custom_id=new_id)
+                RenderManager.add_to_render_queue(new_job)
+                return new_job.json()
+            except ValueError as e:
+                logger.exception(e)
+                return {'error': str(e)}, 400
+
+        except Exception as e:
+            logger.exception(e)
+
+        return {'error': 'unknown error'}
+
+
+def start_server(background_thread=False):
+
+    def eval_loop(delay_sec=1):
+        while True:
+            RenderManager.evaluate_queue()
+            time.sleep(delay_sec)
+
+    logging.basicConfig(format='%(asctime)s: %(levelname)s: %(module)s: %(message)s', datefmt='%d-%b-%y %H:%M:%S',
+                        level=logging.INFO)
+
+    with open('config.yaml') as f:
+        config = yaml.load(f, Loader=yaml.FullLoader)
+
+    app.config['UPLOAD_FOLDER'] = config['upload_folder']
+    app.config['MAX_CONTENT_PATH'] = config['max_content_path']
+    # app.config['RESULT_STATIC_PATH'] = 'static'
+
+    # Get hostname and render clients
+    RenderManager.host_name = socket.gethostname()
+    app.config['HOSTNAME'] = RenderManager.host_name
+    if not RenderManager.render_clients:
+        RenderManager.render_clients = [RenderManager.host_name]
+
+    # disable most Flask logging
+    flask_log = logging.getLogger('werkzeug')
+    flask_log.setLevel(config.get('flask_log_level', 'ERROR').upper())
+
+    # Setup the RenderManager object
+    RenderManager.load_state()
+
+    thread = threading.Thread(target=eval_loop, kwargs={'delay_sec': config.get('queue_eval_seconds', 1)}, daemon=True)
+    thread.start()
+
+    if background_thread:
+        server_thread = threading.Thread(
+            target=lambda: app.run(host='0.0.0.0', port=RenderManager.port, debug=False, use_reloader=False))
+        server_thread.start()
+        server_thread.join()
+    else:
+        app.run(host='0.0.0.0', port=RenderManager.port, debug=config.get('flask_debug_enable', False),
+                use_reloader=False)
+
+
+if __name__ == '__main__':
+    start_server()

templates/upload.html

@@ -1,32 +1,9 @@
 <html>
-
+   <body>
-<body>
+      <form action = "http://localhost:5000/uploader" method = "POST"
-<h1>Upload a file</h1>
+         enctype = "multipart/form-data">
-
+         <input type = "file" name = "file" />
-<form action="/uploader" method="POST"
+         <input type = "submit"/>
-      enctype="multipart/form-data">
+      </form>
-    <div>
+   </body>
-        <input type="file" name="file"/><br>
-    </div>
-    <div>
-        <label for="renderer">Renderer:</label>
-        <select id="renderer" name="renderer" onchange="javascript:rendererCheck();">
-            <option value="aerender">After Effects</option>
-            <option value="blender">Blender</option>
-            <option value="ffmpeg">FFMPEG</option>
-        </select>
-    </div>
-    <br>
-    <div id="show_blender">
-        Blender Engine:
-        <input type="radio" id="cycles" name="blender_engine" value="CYCLES" checked>
-        <label for="cycles">Cycles</label>
-        <input type="radio" id="eevee" name="blender_engine" value="BLENDER_EEVEE">
-        <label for="eevee">Eevee</label>
-    </div>
-    <br>
-
-    <input type="submit"/>
-</form>
-</body>
 </html>

zordon_server.py

@@ -1,596 +0,0 @@
-#!/usr/bin/env python
-import argparse
-import json
-import logging
-import os
-import platform
-import socket
-import threading
-import time
-import uuid
-from datetime import datetime
-
-import psutil
-import requests
-import yaml
-from flask import Flask, jsonify, request, render_template
-from werkzeug.utils import secure_filename
-
-from utilities.render_worker import RenderWorkerFactory, RenderStatus, string_to_status
-
-app = Flask(__name__)
-
-logger = logging.getLogger()
-local_hostname = socket.gethostname()
-
-JSON_FILE = 'server_state.json'
-#todo: move history to sqlite db
-
-
-class RenderJob:
-
-    def __init__(self, render, priority=2, owner=None, client=None, notify=None, custom_id=None):
-        self.id = custom_id or self.generate_id()
-        self.owner = owner
-        self.render = render
-        self.priority = priority
-        self.client = client
-        self.notify = notify
-        self.date_created = datetime.now()
-        self.scheduled_start = None
-        self.renderer = render.renderer
-        self.name = os.path.basename(render.input) + '_' + self.date_created.isoformat()
-        self.archived = False
-
-    def render_status(self):
-        """Returns status of render job"""
-        try:
-            if self.scheduled_start and self.render.status == RenderStatus.NOT_STARTED:
-                return RenderStatus.SCHEDULED
-            else:
-                return self.render.status
-        except Exception as e:
-            logger.warning("render_status error: {}".format(e))
-            return RenderStatus.ERROR
-
-    def json(self):
-        """Converts RenderJob into JSON format"""
-        import numbers
-
-        def date_serializer(o):
-            if isinstance(o, datetime):
-                return o.isoformat()
-
-        json_string = ''
-
-        try:
-            d = self.__dict__.copy()
-            d['status'] = self.render_status().value
-            d['render'] = self.render.__dict__.copy()
-            for key in ['thread', 'process']:  # remove unwanted keys from JSON
-                d['render'].pop(key, None)
-            d['render']['status'] = d['status']
-
-            # jobs from current_session generate percent completed
-            # jobs after loading server pull in a saved value. Have to check if callable object or not
-
-            percent_complete = self.render.percent_complete if isinstance(self.render.percent_complete, numbers.Number) \
-                else self.render.percent_complete()
-            d['render']['percent_complete'] = percent_complete
-
-            json_string = json.dumps(d, default=date_serializer)
-        except Exception as e:
-            logger.error("Error converting to JSON: {}".format(e))
-        return json_string
-
-    @classmethod
-    def generate_id(cls):
-        return str(uuid.uuid4()).split('-')[0]
-
-
-class RenderServer:
-    render_queue = []
-    render_clients = []
-    maximum_renderer_instances = {'Blender': 2, 'After Effects': 1, 'ffmpeg': 4}
-    host_name = None
-    port = 8080
-    client_mode = False
-    server_hostname = None
-
-    last_saved_counts = {}
-
-    def __init__(self):
-        pass
-
-    @classmethod
-    def add_to_render_queue(cls, render_job, force_start=False, client=None):
-
-        if not client or render_job.client == cls.host_name:
-            logger.debug('Adding priority {} job to render queue: {}'.format(render_job.priority, render_job.render))
-            render_job.client = cls.host_name
-            cls.render_queue.append(render_job)
-            if force_start:
-                cls.start_job(render_job)
-            else:
-                cls.evaluate_queue()
-        else:
-            # todo: implement client rendering
-            logger.warning('remote client rendering not implemented yet')
-
-    @classmethod
-    def running_jobs(cls):
-        return cls.jobs_with_status(RenderStatus.RUNNING)
-
-    @classmethod
-    def pending_jobs(cls):
-        pending_jobs = cls.jobs_with_status(RenderStatus.NOT_STARTED)
-        pending_jobs.extend(cls.jobs_with_status(RenderStatus.SCHEDULED))
-        return pending_jobs
-
-    @classmethod
-    def jobs_with_status(cls, status, priority_sorted=False, include_archived=True):
-        found_jobs = [x for x in cls.render_queue if x.render_status() == status]
-        if not include_archived:
-            found_jobs = [x for x in found_jobs if not x.archived]
-        if priority_sorted:
-            found_jobs = sorted(found_jobs, key=lambda a: a.priority, reverse=False)
-        return found_jobs
-
-    @classmethod
-    def job_with_id(cls, job_id):
-        found_job = next((x for x in cls.render_queue if x.id == job_id), None)
-        return found_job
-
-    @classmethod
-    def clear_history(cls):
-        to_remove = [x for x in cls.render_queue if x.render_status() in [RenderStatus.CANCELLED,
-                                                                          RenderStatus.COMPLETED, RenderStatus.ERROR]]
-        for x in to_remove:
-            x.archived = True
-        cls.save_state()
-
-    @classmethod
-    def load_state(cls, json_path=None):
-        """Load state history from JSON file"""
-
-        input_path = json_path or JSON_FILE
-        if os.path.exists(input_path):
-            with open(input_path) as f:
-
-                # load saved data
-                saved_state = json.load(f)
-                cls.render_clients = saved_state.get('clients', {})
-
-                for job in saved_state.get('jobs', []):
-
-                    # Identify renderer type and recreate Renderer object
-                    job_render_object = RenderWorkerFactory.create_worker(job['renderer'], input_path=job['render']['input'], output_path=job['render']['output'])
-
-                    # Load Renderer values
-                    for key, val in job['render'].items():
-                        if val and key in ['start_time', 'end_time']:  # convert date strings back into date objects
-                            job_render_object.__dict__[key] = datetime.fromisoformat(val)
-                        else:
-                            job_render_object.__dict__[key] = val
-
-                    job_render_object.status = RenderStatus[job['status'].upper()]
-                    job.pop('render', None)
-
-                    # Create RenderJob with re-created Renderer object
-                    new_job = RenderJob(job_render_object, job['priority'], job['client'])
-                    for key, val in job.items():
-                        if key in ['date_created']:  # convert date strings back to datetime objects
-                            new_job.__dict__[key] = datetime.fromisoformat(val)
-                        else:
-                            new_job.__dict__[key] = val
-                    new_job.__delattr__('status')
-
-                    # Handle older loaded jobs that were cancelled before closing
-                    if new_job.render_status() == RenderStatus.RUNNING:
-                        new_job.render.status = RenderStatus.CANCELLED
-
-                    # finally add back to render queue
-                    cls.render_queue.append(new_job)
-
-                cls.last_saved_counts = cls.job_counts()
-
-    @classmethod
-    def save_state(cls, json_path=None):
-        """Save state history to JSON file"""
-        try:
-            logger.debug("Saving Render History")
-            output = {'timestamp': datetime.now().isoformat(),
-                      'jobs': [json.loads(j.json()) for j in cls.render_queue],
-                      'clients': cls.render_clients}
-            output_path = json_path or JSON_FILE
-            with open(output_path, 'w') as f:
-                json.dump(output, f, indent=4)
-            cls.last_saved_counts = cls.job_counts()
-        except Exception as e:
-            logger.error("Error saving state JSON: {}".format(e))
-
-    @classmethod
-    def evaluate_queue(cls):
-
-        instances = cls.renderer_instances()
-
-        not_started = cls.jobs_with_status(RenderStatus.NOT_STARTED, priority_sorted=True)
-        if not_started:
-            for job in not_started:
-                renderer = job.render.renderer
-                higher_priority_jobs = [x for x in cls.running_jobs() if x.priority < job.priority]
-                max_renderers = renderer in instances.keys() and instances[
-                    renderer] >= cls.maximum_renderer_instances.get(renderer, 1)
-
-                if not max_renderers and not higher_priority_jobs:
-                    cls.start_job(job)
-
-        scheduled = cls.jobs_with_status(RenderStatus.SCHEDULED, priority_sorted=True)
-        for job in scheduled:
-            if job.scheduled_start <= datetime.now():
-                cls.start_job(job)
-
-        if cls.last_saved_counts != cls.job_counts():
-            cls.save_state()
-
-    @classmethod
-    def start_job(cls, job):
-        logger.info('Starting {}render: {} - Priority {}'.format('scheduled ' if job.scheduled_start else '', job.name,
-                                                                  job.priority))
-        job.render.start()
-
-    @classmethod
-    def cancel_job(cls, job):
-        logger.info('Cancelling job ID: {}'.format(job.id))
-        if job.render_status() in [RenderStatus.NOT_STARTED, RenderStatus.RUNNING, RenderStatus.ERROR]:
-            job.render.stop()
-            job.render.status = RenderStatus.CANCELLED
-            return True
-        return False
-
-    @classmethod
-    def renderer_instances(cls):
-        from collections import Counter
-        all_instances = [x.render.renderer for x in cls.running_jobs()]
-        return Counter(all_instances)
-
-    @classmethod
-    def job_counts(cls):
-        job_counts = {}
-        for job_status in RenderStatus:
-            job_counts[job_status.value] = len(RenderServer.jobs_with_status(job_status))
-
-        return job_counts
-
-    @classmethod
-    def status(cls):
-
-        stats = {"timestamp": datetime.now().isoformat(),
-                 "platform": platform.platform(),
-                 "cpu_percent": psutil.cpu_percent(percpu=False),
-                 "cpu_percent_per_cpu": psutil.cpu_percent(percpu=True),
-                 "cpu_count": psutil.cpu_count(),
-                 "memory_total": psutil.virtual_memory().total,
-                 "memory_available": psutil.virtual_memory().available,
-                 "memory_percent": psutil.virtual_memory().percent,
-                 "job_counts": RenderServer.job_counts(),
-                 "host_name": RenderServer.host_name
-                 }
-
-        return stats
-
-    @classmethod
-    def all_jobs(cls):
-        all_jobs = [x for x in RenderServer.render_queue if not x.archived]
-        return all_jobs
-
-    @classmethod
-    def register_client(cls, hostname):
-
-        success = False
-
-        if hostname in cls.render_clients:
-            logger.warning(f"Client '{hostname}' already registered")
-            return success
-
-        try:
-            response = requests.get(f"http://{hostname}:8080/status", timeout=3)
-            if response.ok:
-                cls.render_clients.append(hostname)
-                logger.info(f"Client '{hostname}' successfully registered")
-                success = True
-                cls.save_state()
-        except requests.ConnectionError as e:
-            logger.error(f"Cannot connect to client at hostname: {hostname}")
-        return success
-
-    @classmethod
-    def unregister_client(cls, hostname):
-        success = False
-        if hostname in cls.render_clients and hostname != cls.host_name:
-            cls.render_clients.remove(hostname)
-            logger.info(f"Client '{hostname}' successfully unregistered")
-            success = True
-        return success
-
-    @staticmethod
-    def is_client_available(client_hostname, timeout=3):
-        try:
-            response = requests.get(f"http://{client_hostname}:8080/status", timeout=timeout)
-            if response.ok:
-                return True
-        except requests.ConnectionError as e:
-            pass
-        return False
-
-    @classmethod
-    def start(cls, background_thread=False):
-
-        def eval_loop(delay_sec=1):
-            while True:
-                cls.evaluate_queue()
-                time.sleep(delay_sec)
-
-        logging.basicConfig(format='%(asctime)s: %(levelname)s: %(module)s: %(message)s', datefmt='%d-%b-%y %H:%M:%S',
-                            level=logging.INFO)
-
-        with open('config.yaml') as f:
-            config = yaml.load(f, Loader=yaml.FullLoader)
-
-        app.config['UPLOAD_FOLDER'] = config['upload_folder']
-        app.config['MAX_CONTENT_PATH'] = config['max_content_path']
-        app.config['RESULT_STATIC_PATH'] = 'static/'
-
-        # Get hostname and render clients
-        cls.host_name = socket.gethostname()
-        if not RenderServer.render_clients:
-            cls.render_clients = [RenderServer.host_name]
-
-        if not cls.client_mode:
-            logger.info(f"Starting Zordon in Server Mode - {cls.host_name}")
-        else:
-            logger.info(f"Starting Zordon in Client Mode - {cls.host_name}")
-
-        # disable most Flask logging
-        flask_log = logging.getLogger('werkzeug')
-        flask_log.setLevel(config.get('flask_log_level', 'ERROR').upper())
-
-        # Setup the RenderServer object
-        cls.load_state()
-
-        thread = threading.Thread(target=eval_loop, kwargs={'delay_sec': config.get('queue_eval_seconds', 1)}, daemon=True)
-        thread.start()
-
-        if background_thread:
-            server_thread = threading.Thread(
-                target=lambda: app.run(host='0.0.0.0', port=cls.port, debug=False, use_reloader=False))
-            server_thread.start()
-            server_thread.join()
-        else:
-            app.run(host='0.0.0.0', port=cls.port, debug=config.get('flask_debug_enable', False),
-                    use_reloader=False)
-
-
-@app.get('/jobs')
-def jobs_json():
-    return [json.loads(x.json()) for x in RenderServer.render_queue if not x.archived]
-
-
-@app.get('/jobs/<status_val>')
-def filtered_jobs_json(status_val):
-    state = string_to_status(status_val)
-    jobs = [json.loads(x.json()) for x in RenderServer.jobs_with_status(state)]
-    return jobs
-
-
-@app.get('/job_status/<job_id>')
-def get_job_status(job_id):
-    found_job = RenderServer.job_with_id(job_id)
-    if found_job:
-        return found_job.json()
-    else:
-        return None
-
-
-@app.post('/register_client')
-def register_client():
-    client_hostname = request.values['hostname']
-    x = RenderServer.register_client(client_hostname)
-    return "Success" if x else "Fail"
-
-
-@app.post('/unregister_client')
-def unregister_client():
-    client_hostname = request.values['hostname']
-    x = RenderServer.unregister_client(client_hostname)
-    return "Success" if x else "Fail"
-
-
-@app.get('/full_status')
-def full_status():
-    full_results = {'timestamp': datetime.now().isoformat(), 'servers': {}}
-
-    try:
-        for client_hostname in RenderServer.render_clients:
-            is_online = False
-            if client_hostname == local_hostname:
-                snapshot_results = snapshot()
-                is_online = True
-            else:
-                snapshot_results = {}
-                try:
-                    snapshot_request = requests.get(f'http://{client_hostname}:8080/snapshot', timeout=1)
-                    snapshot_results = snapshot_request.json()
-                    is_online = snapshot_request.ok
-                except requests.ConnectionError as e:
-                    pass
-            server_data = {'status': snapshot_results.get('status', {}), 'jobs': snapshot_results.get('jobs', {}),
-                           'is_online': is_online}
-            full_results['servers'][client_hostname] = server_data
-    except Exception as e:
-        logger.error(f"Exception fetching full status: {e}")
-
-    return full_results
-
-
-@app.get('/snapshot')
-def snapshot():
-    server_status = RenderServer.status()
-    server_jobs = [json.loads(x.json()) for x in RenderServer.render_queue if not x.archived]
-    server_data = {'status': server_status, 'jobs': server_jobs, 'timestamp': datetime.now().isoformat()}
-    return server_data
-
-
-@app.post('/add_job')
-def add_job():
-    """Create new job and add to server render queue"""
-    renderer = request.json.get("renderer", None)
-    input_path = request.json.get("input", None)
-    output_path = request.json.get("output", None)
-    priority = request.json.get('priority', 2)
-    args = request.json.get('args', None)
-    client = request.json.get('client', RenderServer.host_name)
-    force_start = request.json.get('force_start', False)
-    
-    if None in [renderer, input_path, output_path]:
-        return {'error': 'missing required parameters'}, 400
-
-    if client == RenderServer.host_name:
-        # Local Renders
-        try:
-            render_job = RenderWorkerFactory.create_worker(renderer, input_path, output_path, args)
-        except ValueError as e:
-            logger.exception(e)
-            return {'error': str(e)}, 400
-
-        new_job = RenderJob(render_job, priority=priority)
-        RenderServer.add_to_render_queue(new_job, force_start=force_start)
-
-        return new_job.json()
-
-    elif client in RenderServer.render_clients:
-
-        # see if host is available
-        if RenderServer.is_client_available(client):
-
-            if args and renderer == 'blender' and args.get('pack_files', False):
-                from utilities.blender_worker import pack_blender_files
-                new_path = pack_blender_files(path=input_path)
-                if new_path:
-                    logger.info(f'Packed Blender file successfully: {new_path}')
-                    input_path = new_path
-                else:
-                    err_msg = f'Failed to pack Blender file: {input_path}'
-                    logger.error(err_msg)
-                    return {'error': err_msg}, 400
-
-            # call uploader on remote client
-            try:
-                job_files = {'file': open(input_path, 'rb')}
-                job_data = request.json
-                job_data['input'] = input_path
-                response = requests.post(f"http://{client}:8080/uploader", files=job_files, data=job_data)
-                if response.ok:
-                    logger.info("Job submitted successfully!")
-                    return response.json() if response.json() else "Job ok"
-                else:
-                    return {'error', 'Job rejected by client'}, 400
-            except requests.ConnectionError as e:
-                err_msg = f"Error submitting job to client: {client}"
-                logger.error(err_msg)
-                return {'error', err_msg}, 400
-        else:
-            # client is not available
-            err_msg = f"Render client '{client}' is unreachable"
-            logger.error(err_msg)
-            return {'error', err_msg}, 400
-
-    else:
-        err_msg = f"Unknown render client: '{client}'"
-        logger.error(err_msg)
-        return {'error', err_msg}, 400
-
-
-@app.get('/cancel_job')
-def cancel_job():
-    job_id = request.args.get('id', None)
-    confirm = request.args.get('confirm', False)
-    if not job_id:
-        return {'error': 'job id not found'}, 400
-    elif not confirm:
-        return {'error': 'confirmation required'}, 400
-    else:
-        found = [x for x in RenderServer.render_queue if x.id == job_id]
-        if len(found) > 1:
-            # logger.error('Multiple jobs found for ID {}'.format(job_id))
-            return jsonify({'error': 'multiple jobs found for ID {}'.format(job_id)})
-        elif found:
-            success = RenderServer.cancel_job(found[0])
-            return jsonify({'result': success})
-    return {'error': 'job not found'}, 400
-
-
-@app.get('/clear_history')
-def clear_history():
-    RenderServer.clear_history()
-    return {'result': True}
-
-
-@app.route('/status')
-def status():
-    return RenderServer.status()
-
-
-@app.route('/')
-def default():
-    return "Server running"
-
-
-@app.route('/upload')
-def upload_file_page():
-    return render_template('upload.html')
-
-
-@app.route('/uploader', methods=['POST'])
-def upload_file():
-
-    if request.method == 'POST':
-        try:
-
-            uploaded_file = request.files['file']
-            if not uploaded_file.filename:
-                return {'error': 'no file uploaded'}
-
-            # generate directory to use
-            logger.debug(f"Receiving uploaded file {uploaded_file.filename}")
-            new_id = RenderJob.generate_id()
-            job_dir = os.path.join(app.config['UPLOAD_FOLDER'], new_id + "-" + uploaded_file.filename)
-            if not os.path.exists(job_dir):
-                os.makedirs(job_dir)
-
-            local_path = os.path.join(job_dir, secure_filename(uploaded_file.filename))
-            uploaded_file.save(local_path)
-            renderer = request.values['renderer']
-
-            # todo: finish output_path - currently placeholder data
-            output_path = os.path.join(job_dir, uploaded_file.filename + "-output.mp4")
-
-            try:
-                render_job = RenderWorkerFactory.create_worker(renderer, local_path, output_path,
-                                                               args=request.values.get('args', None))
-                new_job = RenderJob(render_job, custom_id=new_id)
-                RenderServer.add_to_render_queue(new_job)
-                return new_job.json()
-            except ValueError as e:
-                logger.exception(e)
-                return {'error': str(e)}, 400
-
-        except Exception as e:
-            logger.exception(e)
-
-        return {'error': 'unknown error'}
-
-
-if __name__ == '__main__':
-    RenderServer.start()
-