init commit

backend/app/livekit_service.py

@@ -0,0 +1,45 @@
+from datetime import timedelta
+
+from livekit import api
+
+from .config import settings
+
+
+async def create_room_if_needed(room_name: str) -> None:
+    lkapi = api.LiveKitAPI(
+        url=settings.livekit_url,
+        api_key=settings.livekit_api_key,
+        api_secret=settings.livekit_api_secret,
+    )
+    try:
+        rooms = await lkapi.room.list_rooms(api.ListRoomsRequest(names=[room_name]))
+        if rooms.rooms:
+            return
+        await lkapi.room.create_room(
+            api.CreateRoomRequest(
+                name=room_name,
+                empty_timeout=settings.room_empty_timeout_seconds,
+                max_participants=20,
+            )
+        )
+    finally:
+        await lkapi.aclose()
+
+
+async def build_participant_token(*, room_name: str, identity: str, display_name: str) -> str:
+    token = (
+        api.AccessToken(settings.livekit_api_key, settings.livekit_api_secret)
+        .with_identity(identity)
+        .with_name(display_name)
+        .with_ttl(timedelta(hours=settings.call_token_ttl_hours))
+        .with_grants(
+            api.VideoGrants(
+                room_join=True,
+                room=room_name,
+                can_publish=True,
+                can_subscribe=True,
+                can_update_own_metadata=True,
+            )
+        )
+    )
+    return token.to_jwt()