Windows path fixes (#129)

* Change uses of os.path to use Pathlib

* Add return types and type hints

* Add more docstrings

* Add missing import to api_server

server.py

@@ -3,6 +3,7 @@ import multiprocessing
 import os
 import socket
 import threading
+from pathlib import Path
 
 import psutil
 
@@ -14,7 +15,7 @@ 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, system_safe_path, current_system_cpu, current_system_os,
+from src.utilities.misc_helper import (get_gpu_info, current_system_cpu, current_system_os,
                                        current_system_os_version, current_system_cpu_brand, check_for_updates)
 from src.utilities.zeroconf_server import ZeroconfServer
 from src.version import APP_NAME, APP_VERSION
@@ -33,15 +34,13 @@ class ZordonServer:
 
         # Load Config YAML
         Config.setup_config_dir()
-        Config.load_config(system_safe_path(os.path.join(Config.config_dir(), 'config.yaml')))
+        config_path = Path(Config.config_dir()) / "config.yaml"
+        Config.load_config(config_path)
 
         # configure default paths
-        EngineManager.engines_path = system_safe_path(
-            os.path.join(os.path.join(os.path.expanduser(Config.upload_folder),
-                                      'engines')))
+        EngineManager.engines_path = Path(Config.upload_folder).expanduser()/ "engines"
         os.makedirs(EngineManager.engines_path, exist_ok=True)
-        PreviewManager.storage_path = system_safe_path(
-            os.path.join(os.path.expanduser(Config.upload_folder), 'previews'))
+        PreviewManager.storage_path = Path(Config.upload_folder).expanduser() / "previews"
 
         self.api_server = None
         self.server_hostname = None
@@ -72,11 +71,11 @@ class ZordonServer:
 
         # main start
         logger.info(f"Starting {APP_NAME} Render Server ({APP_VERSION})")
-        logger.debug(f"Upload directory: {os.path.expanduser(Config.upload_folder)}")
+        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}")
         # Set up the RenderQueue object
-        RenderQueue.load_state(database_directory=system_safe_path(os.path.expanduser(Config.upload_folder)))
+        RenderQueue.load_state(database_directory=Path(Config.upload_folder).expanduser())
         ServerProxyManager.subscribe_to_listener()
         DistributedJobManager.subscribe_to_listener()