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Tweak "state"
and "timeline"
filtering (#2844)
This should stop state events disappearing down a gap where we'd try to separate out the sections *before* applying history visibility instead of after. This may be a better approach than #2843 but I hope @tak-hntlabs will shout if it isn't.
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66a82e0fa4
commit
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@ -251,8 +251,10 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
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}
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return r.From, fmt.Errorf("p.DB.RecentEvents: %w", err)
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}
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recentEvents := snapshot.StreamEventsToEvents(device, recentStreamEvents)
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delta.StateEvents = removeDuplicates(delta.StateEvents, recentEvents) // roll back
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recentEvents := gomatrixserverlib.HeaderedReverseTopologicalOrdering(
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snapshot.StreamEventsToEvents(device, recentStreamEvents),
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gomatrixserverlib.TopologicalOrderByPrevEvents,
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)
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prevBatch, err := snapshot.GetBackwardTopologyPos(ctx, recentStreamEvents)
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if err != nil {
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return r.From, fmt.Errorf("p.DB.GetBackwardTopologyPos: %w", err)
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@ -263,10 +265,6 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
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return r.To, nil
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}
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// Sort the events so that we can pick out the latest events from both sections.
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recentEvents = gomatrixserverlib.HeaderedReverseTopologicalOrdering(recentEvents, gomatrixserverlib.TopologicalOrderByPrevEvents)
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delta.StateEvents = gomatrixserverlib.HeaderedReverseTopologicalOrdering(delta.StateEvents, gomatrixserverlib.TopologicalOrderByAuthEvents)
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// Work out what the highest stream position is for all of the events in this
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// room that were returned.
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latestPosition := r.To
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@ -314,6 +312,14 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
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limited = true
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}
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// Now that we've filtered the timeline, work out which state events are still
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// left. Anything that appears in the filtered timeline will be removed from the
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// "state" section and kept in "timeline".
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delta.StateEvents = gomatrixserverlib.HeaderedReverseTopologicalOrdering(
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removeDuplicates(delta.StateEvents, recentEvents),
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gomatrixserverlib.TopologicalOrderByAuthEvents,
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)
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if len(delta.StateEvents) > 0 {
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updateLatestPosition(delta.StateEvents[len(delta.StateEvents)-1].EventID())
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}
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@ -507,7 +513,6 @@ func (p *PDUStreamProvider) getJoinResponseForCompleteSync(
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// transaction IDs for complete syncs, but we do it anyway because Sytest demands it for:
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// "Can sync a room with a message with a transaction id" - which does a complete sync to check.
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recentEvents := snapshot.StreamEventsToEvents(device, recentStreamEvents)
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stateEvents = removeDuplicates(stateEvents, recentEvents)
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events := recentEvents
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// Only apply history visibility checks if the response is for joined rooms
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@ -521,7 +526,7 @@ func (p *PDUStreamProvider) getJoinResponseForCompleteSync(
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// If we are limited by the filter AND the history visibility filter
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// didn't "remove" events, return that the response is limited.
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limited = limited && len(events) == len(recentEvents)
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stateEvents = removeDuplicates(stateEvents, recentEvents)
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if stateFilter.LazyLoadMembers {
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if err != nil {
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return nil, err
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@ -40,4 +40,9 @@ Accesing an AS-hosted room alias asks the AS server
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Guest users can join guest_access rooms
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# This will fail in HTTP API mode, so blacklisted for now
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If a device list update goes missing, the server resyncs on the next one
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If a device list update goes missing, the server resyncs on the next one
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# Might be a bug in the test because leaves do appear :-(
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Leaves are present in non-gapped incremental syncs
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@ -699,7 +699,7 @@ We do send redundant membership state across incremental syncs if asked
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Rejecting invite over federation doesn't break incremental /sync
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Gapped incremental syncs include all state changes
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Old leaves are present in gapped incremental syncs
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Leaves are present in non-gapped incremental syncs
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#Leaves are present in non-gapped incremental syncs
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Members from the gap are included in gappy incr LL sync
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Presence can be set from sync
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/state returns M_NOT_FOUND for a rejected message event
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