Fix potential issues with ignore_unbridged_group_chat option

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v0.15.1 (unreleased)
+
+* Updated Docker image to Alpine 3.19.
+* Fixed some potential cases where a portal room would be created for the
+  relaybot even if `ignore_unbridged_group_chat` was enabled.
+
 # v0.15.0 (2023-11-26)
 
 * Removed support for MSC2716 backfilling.

mautrix_telegram/abstract_user.py

@@ -658,7 +658,11 @@ async def update_channel(self, update: UpdateChannel) -> None:
             await portal.delete_telegram_user(self.tgid, sender=None)
         elif chan := getattr(update, "mau_channel", None):
             if not portal.mxid:
-                background_task.create(self._delayed_create_channel(chan))
+                if (
+                    not self.is_relaybot
+                    or not self.config["bridge.relaybot.ignore_unbridged_group_chat"]
+                ):
+                    background_task.create(self._delayed_create_channel(chan))
             else:
                 self.log.debug("Updating channel info with data fetched by Telethon")
                 await portal.update_info(self, chan)

mautrix_telegram/portal.py

@@ -787,6 +787,8 @@ async def create_matrix_room(
                 background_task.create(update)
                 await self.invite_to_matrix(invites or [])
             return self.mxid
+        elif user.is_relaybot and self.config["bridge.relaybot.ignore_unbridged_group_chat"]:
+            raise Exception("create_matrix_room called as relaybot")
         async with self._room_create_lock:
             try:
                 return await self._create_matrix_room(
@@ -3372,6 +3374,8 @@ async def _handle_telegram_message(
         self, source: au.AbstractUser, sender: p.Puppet | None, evt: Message
     ) -> None:
         if not self.mxid:
+            if source.is_relaybot and self.config["bridge.relaybot.ignore_unbridged_group_chat"]:
+                return
             self.log.debug("Got telegram message %d, but no room exists, creating...", evt.id)
             await self.create_matrix_room(source, invites=[source.mxid], update_if_exists=False)
             if not self.mxid:
@@ -3536,7 +3540,7 @@ async def _mark_disappearing(
     async def _create_room_on_action(
         self, source: au.AbstractUser, action: TypeMessageAction
     ) -> bool:
-        if source.is_relaybot and self.config["bridge.ignore_unbridged_group_chat"]:
+        if source.is_relaybot and self.config["bridge.relaybot.ignore_unbridged_group_chat"]:
             return False
         create_and_exit = (MessageActionChatCreate, MessageActionChannelCreate)
         create_and_continue = (