Create Native Menu Bar with PyQt to open Search, Config webpages

- Run FastAPI server in a separate thread.
  - This allows starting both the server and gui in parallel

- Create System Tray for Khoj
  - Contains menu items that open search or config pages in browser

- Rearrange code to have only the code required to start Backend and
  GUI in the run() method
  - Move the backend setup code into a separate method

setup.py

@@ -39,6 +39,7 @@ setup(
         "pillow >= 9.0.1",
         "aiofiles == 0.8.0",
         "dateparser == 1.1.1",
+        "pyqt6 == 6.3.1",
     ],
     include_package_data=True,
     entry_points={"console_scripts": ["khoj = src.main:run"]},

src/main.py

@@ -4,6 +4,7 @@ import time
 from typing import Optional
 from pathlib import Path
 from functools import lru_cache
+import webbrowser
 
 # External Packages
 import uvicorn
@@ -12,6 +13,7 @@ from fastapi import FastAPI, Request
 from fastapi.responses import HTMLResponse, FileResponse
 from fastapi.staticfiles import StaticFiles
 from fastapi.templating import Jinja2Templates
+from PyQt6 import QtCore, QtGui, QtWidgets
 
 # Internal Packages
 from src.search_type import image_search, text_search
@@ -285,7 +287,7 @@ def shutdown_event():
     print('INFO:\tConversation logs saved to disk.')
 
 
-def run():
+def setup_server():
     # Load config from CLI
     args = cli(sys.argv[1:])
 
@@ -312,11 +314,78 @@ def run():
     global processor_config
     processor_config = initialize_processor(args.config)
 
+    return args.host, args.port, args.socket
+
+
+def run():
+    # Setup Application Server
+    host, port, socket = setup_server()
+
+    # Setup GUI
+    gui = QtWidgets.QApplication([])
+    gui.setQuitOnLastWindowClosed(False)
+    tray = create_system_tray()
+
     # Start Application Server
-    if args.socket:
-        uvicorn.run(app, proxy_headers=True, uds=args.socket)
-    else:
-        uvicorn.run(app, host=args.host, port=args.port)
+    server = ServerThread(app, host, port, socket)
+    server.start()
+    gui.aboutToQuit.connect(server.terminate)
+
+    # Start the GUI
+    tray.show()
+    gui.exec()
+
+
+class ServerThread(QtCore.QThread):
+    def __init__(self, app, host=None, port=None, socket=None):
+        super(ServerThread, self).__init__()
+        self.app = app
+        self.host = host
+        self.port = port
+        self.socket = socket
+
+    def __del__(self):
+        self.wait()
+
+    def run(self):
+        if self.socket:
+            uvicorn.run(app, proxy_headers=True, uds=self.socket)
+        else:
+            uvicorn.run(app, host=self.host, port=self.port)
+
+
+def create_system_tray():
+    """Create System Tray with Menu
+    Menu Actions should contain
+    1. option to open search page at localhost:8000/
+    2. option to open config page at localhost:8000/config
+    3. to quit
+    """
+
+    # Create the system tray with icon
+    icon_path = web_directory / 'assets/icons/favicon-144x144.png'
+    icon = QtGui.QIcon(f'{icon_path.absolute()}')
+    tray = QtWidgets.QSystemTrayIcon(icon)
+    tray.setVisible(True)
+
+    # Create the menu and menu actions
+    menu = QtWidgets.QMenu()
+    menu_actions = [
+        ('Search', lambda: webbrowser.open('http://localhost:8000/')),
+        ('Configure', lambda: webbrowser.open('http://localhost:8000/config')),
+        ('Quit', quit),
+    ]
+
+    # Add the menu actions to the menu
+    for action_text, action_function in menu_actions:
+        menu_action = QtGui.QAction(action_text, menu)
+        menu_action.triggered.connect(action_function)
+        menu.addAction(menu_action)
+
+    # Add the menu to the system tray
+    tray.setContextMenu(menu)
+
+    return tray
 
 
 if __name__ == '__main__':