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Use state before join to determine if we _should_perform_remote_join (#13270)

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Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
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David Robertson 2022-07-15 13:20:47 +01:00 • committed by GitHub
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commit 7281591f4c
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4 changed files with 35 additions and 24 deletions
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21
synapse/state/__init__.py
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@ -153,22 +153,27 @@ class StateHandler:
ReplicationUpdateCurrentStateRestServlet.make_client(hs)
)
async def get_current_state_ids(
async def compute_state_after_events(
self,
room_id: str,
latest_event_ids: Collection[str],
event_ids: Collection[str],
) -> StateMap[str]:
"""Get the current state, or the state at a set of events, for a room
"""Fetch the state after each of the given event IDs. Resolve them and return.
This is typically used where `event_ids` is a collection of forward extremities
in a room, intended to become the `prev_events` of a new event E. If so, the
return value of this function represents the state before E.
Args:
room_id:
latest_event_ids: The forward extremities to resolve.
room_id: the room_id containing the given events.
event_ids: the events whose state should be fetched and resolved.
Returns:
the state dict, mapping from (event_type, state_key) -> event_id
the state dict (a mapping from (event_type, state_key) -> event_id) which
holds the resolution of the states after the given event IDs.
"""
logger.debug("calling resolve_state_groups from get_current_state_ids")
ret = await self.resolve_state_groups_for_events(room_id, latest_event_ids)
logger.debug("calling resolve_state_groups from compute_state_after_events")
ret = await self.resolve_state_groups_for_events(room_id, event_ids)
return await ret.get_state(self._state_storage_controller, StateFilter.all())
async def get_current_users_in_room(