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Sliding Sync: Add comment to explain extra case where you can be invited -> banned -> unbanned (#17654)

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Add comment to explain extra case where you can be
invited -> banned -> unbanned and we want to be able
to find the invite event.

Follow-up to https://github.com/element-hq/synapse/pull/17636#discussion_r1738993330
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Eric Eastwood 2024-09-09 17:55:59 -05:00 committed by GitHub
parent e1ed959a68
commit 515c1cc0a1
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2 changed files with 8 additions and 3 deletions
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1
changelog.d/17654.misc Normal file
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@ -0,0 +1 @@
Pre-populate room data used in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint for quick filtering/sorting.

10
synapse/storage/databases/main/events_bg_updates.py
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@ -1966,7 +1966,7 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
)
return 0
def _find_previous_membership_txn(
def _find_previous_invite_or_knock_membership_txn(
txn: LoggingTransaction, room_id: str, user_id: str, event_id: str
) -> Tuple[str, str]:
# Find the previous invite/knock event before the leave event
@ -2007,6 +2007,10 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
(
room_id,
user_id,
# We look explicitly for `invite` and `knock` events instead of
# just their previous membership as someone could have been `invite`
# -> `ban` -> unbanned (`leave`) and we want to find the `invite`
# event where the stripped state is.
Membership.INVITE,
Membership.KNOCK,
event_id,
@ -2155,8 +2159,8 @@ class EventsBackgroundUpdatesStore(StreamWorkerStore, StateDeltasStore, SQLBaseS
invite_or_knock_event_id,
invite_or_knock_membership,
) = await self.db_pool.runInteraction(
"sliding_sync_membership_snapshots_bg_update._find_previous_membership",
_find_previous_membership_txn,
"sliding_sync_membership_snapshots_bg_update._find_previous_invite_or_knock_membership_txn",
_find_previous_invite_or_knock_membership_txn,
room_id,
user_id,
membership_event_id,