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Fix newly_left
rooms not appearing if we returned early (Sliding Sync) (#17301)
Fix `newly_left` rooms not appearing if we returned early when `membership_snapshot_token.is_before_or_eq(to_token.room_key)`. Introduced in https://github.com/element-hq/synapse/pull/17187 (part of Sliding Sync) The tests didn't catch it because they had a small typo in it `room_id1` vs `room_id2`. Found while working on https://github.com/element-hq/synapse/pull/17293
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3 changed files with 15 additions and 14 deletions
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changelog.d/17301.bugfix
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changelog.d/17301.bugfix
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Add initial implementation of an experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint.
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@ -275,12 +275,6 @@ class SlidingSyncHandler:
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instance_map=immutabledict(instance_to_max_stream_ordering_map),
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)
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# If our `to_token` is already the same or ahead of the latest room membership
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# for the user, we can just straight-up return the room list (nothing has
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# changed)
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if membership_snapshot_token.is_before_or_eq(to_token.room_key):
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return sync_room_id_set
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# Since we fetched the users room list at some point in time after the from/to
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# tokens, we need to revert/rewind some membership changes to match the point in
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# time of the `to_token`. In particular, we need to make these fixups:
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@ -300,14 +294,20 @@ class SlidingSyncHandler:
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# 1) Fetch membership changes that fall in the range from `to_token` up to
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# `membership_snapshot_token`
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membership_change_events_after_to_token = (
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await self.store.get_membership_changes_for_user(
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user_id,
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from_key=to_token.room_key,
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to_key=membership_snapshot_token,
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excluded_rooms=self.rooms_to_exclude_globally,
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#
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# If our `to_token` is already the same or ahead of the latest room membership
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# for the user, we don't need to do any "2)" fix-ups and can just straight-up
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# use the room list from the snapshot as a base (nothing has changed)
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membership_change_events_after_to_token = []
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if not membership_snapshot_token.is_before_or_eq(to_token.room_key):
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membership_change_events_after_to_token = (
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await self.store.get_membership_changes_for_user(
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user_id,
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from_key=to_token.room_key,
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to_key=membership_snapshot_token,
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excluded_rooms=self.rooms_to_exclude_globally,
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)
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)
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)
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# 1) Assemble a list of the last membership events in some given ranges. Someone
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# could have left and joined multiple times during the given range but we only
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@ -326,7 +326,7 @@ class GetSyncRoomIdsForUserTestCase(HomeserverTestCase):
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# Leave during the from_token/to_token range (newly_left)
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room_id2 = self.helper.create_room_as(user1_id, tok=user1_tok)
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self.helper.leave(room_id1, user1_id, tok=user1_tok)
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self.helper.leave(room_id2, user1_id, tok=user1_tok)
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after_room2_token = self.event_sources.get_current_token()
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