Automatically delete empty groups/communities (#6453)

Signed-off-by: Werner Sembach <werner.sembach@fau.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/synapse/groups/groups_server.py b/synapse/groups/groups_server.py

index 29e8ffc295..0ec9be3cb5 100644
--- a/synapse/groups/groups_server.py
+++ b/synapse/groups/groups_server.py
@@ -773,6 +773,11 @@ class GroupsServerHandler(object):
         if not self.hs.is_mine_id(user_id):
             yield self.store.maybe_delete_remote_profile_cache(user_id)
 
+        # Delete group if the last user has left
+        users = yield self.store.get_users_in_group(group_id, include_private=True)
+        if not users:
+            yield self.store.delete_group(group_id)
+
         return {}
 
     @defer.inlineCallbacks