diff options
Diffstat (limited to 'synapse/events')
| -rw-r--r-- | synapse/events/snapshot.py | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/synapse/events/snapshot.py b/synapse/events/snapshot.py index 0f3c5989cb..64e898f40c 100644 --- a/synapse/events/snapshot.py +++ b/synapse/events/snapshot.py @@ -48,10 +48,21 @@ class EventContext: Note that this is a private attribute: it should be accessed via the ``state_group`` property. + state_group_before_event: The ID of the state group representing the state + of the room before this event. + + If this is a non-state event, this will be the same as ``state_group``. If + it's a state event, it will be the same as ``prev_group``. + + If ``state_group`` is None (ie, the event is an outlier), + ``state_group_before_event`` will always also be ``None``. + prev_group: If it is known, ``state_group``'s prev_group. Note that this being None does not necessarily mean that ``state_group`` does not have a prev_group! + If the event is a state event, this is normally the same as ``prev_group``. + If ``state_group`` is None (ie, the event is an outlier), ``prev_group`` will always also be ``None``. @@ -77,7 +88,8 @@ class EventContext: ``get_current_state_ids``. _AsyncEventContext impl calculates this on-demand: it will be None until that happens. - _prev_state_ids: The room state map, excluding this event. For a non-state + _prev_state_ids: The room state map, excluding this event - ie, the state + in ``state_group_before_event``. For a non-state event, this will be the same as _current_state_events. Note that it is a completely different thing to prev_group! @@ -92,6 +104,7 @@ class EventContext: rejected = attr.ib(default=False, type=Union[bool, str]) _state_group = attr.ib(default=None, type=Optional[int]) + state_group_before_event = attr.ib(default=None, type=Optional[int]) prev_group = attr.ib(default=None, type=Optional[int]) delta_ids = attr.ib(default=None, type=Optional[Dict[Tuple[str, str], str]]) app_service = attr.ib(default=None, type=Optional[ApplicationService]) @@ -103,12 +116,18 @@ class EventContext: @staticmethod def with_state( - state_group, current_state_ids, prev_state_ids, prev_group=None, delta_ids=None + state_group, + state_group_before_event, + current_state_ids, + prev_state_ids, + prev_group=None, + delta_ids=None, ): return EventContext( current_state_ids=current_state_ids, prev_state_ids=prev_state_ids, state_group=state_group, + state_group_before_event=state_group_before_event, prev_group=prev_group, delta_ids=delta_ids, ) @@ -140,6 +159,7 @@ class EventContext: "event_type": event.type, "event_state_key": event.state_key if event.is_state() else None, "state_group": self._state_group, + "state_group_before_event": self.state_group_before_event, "rejected": self.rejected, "prev_group": self.prev_group, "delta_ids": _encode_state_dict(self.delta_ids), @@ -165,6 +185,7 @@ class EventContext: event_type=input["event_type"], event_state_key=input["event_state_key"], state_group=input["state_group"], + state_group_before_event=input["state_group_before_event"], prev_group=input["prev_group"], delta_ids=_decode_state_dict(input["delta_ids"]), rejected=input["rejected"], |