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Handle the case of remote users leaving a partial join room for device lists (#13885)

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Erik Johnston 2022-09-27 13:01:08 +01:00 • committed by GitHub
parent 85e161631a
commit e8318a4333
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7 changed files with 86 additions and 108 deletions
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71
synapse/storage/controllers/persist_events.py
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@ -598,11 +598,6 @@ class EventsPersistenceStorageController:
# room
state_delta_for_room: Dict[str, DeltaState] = {}
# Set of remote users which were in rooms the server has left or who may
# have left rooms the server is in. We should check if we still share any
# rooms and if not we mark their device lists as stale.
potentially_left_users: Set[str] = set()
if not backfilled:
with Measure(self._clock, "_calculate_state_and_extrem"):
# Work out the new "current state" for each room.
@ -716,8 +711,6 @@ class EventsPersistenceStorageController:
room_id,
ev_ctx_rm,
delta,
current_state,
potentially_left_users,
)
if not is_still_joined:
logger.info("Server no longer in room %s", room_id)
@ -725,20 +718,6 @@ class EventsPersistenceStorageController:
current_state = {}
delta.no_longer_in_room = True
# Add all remote users that might have left rooms.
potentially_left_users.update(
user_id
for event_type, user_id in delta.to_delete
if event_type == EventTypes.Member
and not self.is_mine_id(user_id)
)
potentially_left_users.update(
user_id
for event_type, user_id in delta.to_insert.keys()
if event_type == EventTypes.Member
and not self.is_mine_id(user_id)
)
state_delta_for_room[room_id] = delta
await self.persist_events_store._persist_events_and_state_updates(
@ -749,8 +728,6 @@ class EventsPersistenceStorageController:
inhibit_local_membership_updates=backfilled,
)
await self._handle_potentially_left_users(potentially_left_users)
return replaced_events
async def _calculate_new_extremities(
@ -1126,8 +1103,6 @@ class EventsPersistenceStorageController:
room_id: str,
ev_ctx_rm: List[Tuple[EventBase, EventContext]],
delta: DeltaState,
current_state: Optional[StateMap[str]],
potentially_left_users: Set[str],
) -> bool:
"""Check if the server will still be joined after the given events have
been persised.
@ -1137,11 +1112,6 @@ class EventsPersistenceStorageController:
ev_ctx_rm
delta: The delta of current state between what is in the database
and what the new current state will be.
current_state: The new current state if it already been calculated,
otherwise None.
potentially_left_users: If the server has left the room, then joined
remote users will be added to this set to indicate that the
server may no longer be sharing a room with them.
"""
if not any(
@ -1195,45 +1165,4 @@ class EventsPersistenceStorageController:
):
return True
# The server will leave the room, so we go and find out which remote
# users will still be joined when we leave.
if current_state is None:
current_state = await self.main_store.get_partial_current_state_ids(room_id)
current_state = dict(current_state)
for key in delta.to_delete:
current_state.pop(key, None)
current_state.update(delta.to_insert)
remote_event_ids = [
event_id
for (
typ,
state_key,
), event_id in current_state.items()
if typ == EventTypes.Member and not self.is_mine_id(state_key)
]
members = await self.main_store.get_membership_from_event_ids(remote_event_ids)
potentially_left_users.update(
member.user_id
for member in members.values()
if member and member.membership == Membership.JOIN
)
return False
async def _handle_potentially_left_users(self, user_ids: Set[str]) -> None:
"""Given a set of remote users check if the server still shares a room with
them. If not then mark those users' device cache as stale.
"""
if not user_ids:
return
joined_users = await self.main_store.get_users_server_still_shares_room_with(
user_ids
)
left_users = user_ids - joined_users
for user_id in left_users:
await self.main_store.mark_remote_user_device_list_as_unsubscribed(user_id)