fix(realtime,ui): sync message deletes and channel delete/leave behavior

app/messages/router.py

@@ -13,6 +13,7 @@ from app.messages.schemas import (
     MessageStatusUpdateRequest,
     MessageUpdateRequest,
 )
+from app.messages.repository import get_message_by_id
 from app.messages.service import (
     create_chat_message,
     delete_message,
@@ -87,7 +88,10 @@ async def remove_message(
     current_user: User = Depends(get_current_user),
 ) -> None:
     if for_all:
+        message = await get_message_by_id(db, message_id)
         await delete_message_for_all(db, message_id=message_id, user_id=current_user.id)
+        if message:
+            await realtime_gateway.publish_chat_updated(chat_id=message.chat_id)
         return
     await delete_message(db, message_id=message_id, user_id=current_user.id)
 

app/messages/service.py

@@ -206,6 +206,11 @@ async def delete_message(db: AsyncSession, *, message_id: int, user_id: int) ->
     membership = await chats_repository.get_chat_member(db, chat_id=message.chat_id, user_id=user_id)
     if not membership:
         raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="You are not a member of this chat")
+    if chat.type == ChatType.CHANNEL and not chat.is_saved:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+            detail="Channel messages can only be deleted for everyone",
+        )
     # Telegram-like default: delete only for current user.
     hidden = await repository.get_hidden_message(db, message_id=message.id, user_id=user_id)
     if not hidden: