Query ThirdPartyEventRules about public rooms during room creation

synapse/handlers/room.py

@@ -683,6 +683,13 @@ class RoomCreationHandler(BaseHandler):
 
         directory_handler = self.hs.get_handlers().directory_handler
         if room_alias:
+            # Check if publishing is blocked by a third party module
+            allowed_by_third_party_rules = await (
+                self.third_party_event_rules.check_room_can_be_added_to_public_rooms_directory(
+                    room_id
+                )
+            )
+            if allowed_by_third_party_rules:
                 await directory_handler.create_association(
                     requester=requester,
                     room_id=room_id,