backend: add push token API and FCM delivery pipeline

app/notifications/router.py

@@ -1,10 +1,10 @@
-from fastapi import APIRouter, Depends
+from fastapi import APIRouter, Body, Depends, Response, status
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.auth.service import get_current_user
 from app.database.session import get_db
-from app.notifications.schemas import NotificationRead
-from app.notifications.service import get_notifications_for_user
+from app.notifications.schemas import NotificationRead, PushTokenDeleteRequest, PushTokenUpsertRequest
+from app.notifications.service import get_notifications_for_user, register_push_token, unregister_push_token
 from app.users.models import User
 
 router = APIRouter(prefix="/notifications", tags=["notifications"])
@@ -17,3 +17,23 @@ async def list_my_notifications(
     current_user: User = Depends(get_current_user),
 ) -> list[NotificationRead]:
     return await get_notifications_for_user(db, user_id=current_user.id, limit=limit)
+
+
+@router.post("/push-token", status_code=status.HTTP_204_NO_CONTENT)
+async def upsert_my_push_token(
+    payload: PushTokenUpsertRequest,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> Response:
+    await register_push_token(db, user_id=current_user.id, payload=payload)
+    return Response(status_code=status.HTTP_204_NO_CONTENT)
+
+
+@router.api_route("/push-token", methods=["DELETE"], status_code=status.HTTP_204_NO_CONTENT)
+async def delete_my_push_token(
+    payload: PushTokenDeleteRequest = Body(...),
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> Response:
+    await unregister_push_token(db, user_id=current_user.id, payload=payload)
+    return Response(status_code=status.HTTP_204_NO_CONTENT)