add banbanmini backend

talkingq-url/services/connection_manager.py

@@ -0,0 +1,29 @@
+import asyncio
+from typing import Dict, Optional
+from fastapi import WebSocket
+
+
+class ConnectionManager:
+    def __init__(self):
+        self.connections: Dict[str, WebSocket] = {}
+        self.lock = asyncio.Lock()
+
+    async def add_connection(self, device_id: str, websocket: WebSocket):
+        async with self.lock:
+            self.connections[device_id] = websocket
+
+    async def remove_connection(self, device_id: str):
+        async with self.lock:
+            if device_id in self.connections:
+                del self.connections[device_id]
+
+    async def get_connection(self, device_id: str) -> Optional[WebSocket]:
+        async with self.lock:
+            return self.connections.get(device_id)
+
+    async def get_all_connections(self) -> Dict[str, WebSocket]:
+        async with self.lock:
+            return dict(self.connections)
+
+
+connection_manager = ConnectionManager()