diff options
Diffstat (limited to 'synapse/handlers/sync.py')
| -rw-r--r-- | synapse/handlers/sync.py | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py index 9d37e2a86f..39964726c5 100644 --- a/synapse/handlers/sync.py +++ b/synapse/handlers/sync.py @@ -2002,7 +2002,7 @@ class SyncHandler: """ user_id = sync_config.user.to_string() - # Note: we get the users room list *before* we get the current token, this + # Note: we get the users room list *before* we get the `now_token`, this # avoids checking back in history if rooms are joined after the token is fetched. token_before_rooms = self.event_sources.get_current_token() mutable_joined_room_ids = set(await self.store.get_rooms_for_user(user_id)) @@ -2014,10 +2014,10 @@ class SyncHandler: now_token = self.event_sources.get_current_token() log_kv({"now_token": now_token}) - # Since we fetched the users room list before the token, there's a small window - # during which membership events may have been persisted, so we fetch these now - # and modify the joined room list for any changes between the get_rooms_for_user - # call and the get_current_token call. + # Since we fetched the users room list before calculating the `now_token` (see + # above), there's a small window during which membership events may have been + # persisted, so we fetch these now and modify the joined room list for any + # changes between the get_rooms_for_user call and the get_current_token call. membership_change_events = [] if since_token: membership_change_events = await self.store.get_membership_changes_for_user( @@ -2027,16 +2027,19 @@ class SyncHandler: self.rooms_to_exclude_globally, ) - mem_last_change_by_room_id: Dict[str, EventBase] = {} + last_membership_change_by_room_id: Dict[str, EventBase] = {} for event in membership_change_events: - mem_last_change_by_room_id[event.room_id] = event + last_membership_change_by_room_id[event.room_id] = event # For the latest membership event in each room found, add/remove the room ID # from the joined room list accordingly. In this case we only care if the # latest change is JOIN. - for room_id, event in mem_last_change_by_room_id.items(): + for room_id, event in last_membership_change_by_room_id.items(): assert event.internal_metadata.stream_ordering + # As a shortcut, skip any events that happened before we got our + # `get_rooms_for_user()` snapshot (any changes are already represented + # in that list). if ( event.internal_metadata.stream_ordering < token_before_rooms.room_key.stream |