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Handle overwriting same event type and state key

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This commit is contained in:
Neil Alexander 2020-09-08 20:15:34 +01:00
parent bc5db48f2c
commit bacf54cd5e
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GPG key ID: A02A2019A2BB0944
1 changed files with 22 additions and 6 deletions
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28
roomserver/api/wrapper.go
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@ -47,7 +47,7 @@ func SendEventWithState(
ctx context.Context, rsAPI RoomserverInternalAPI, state *gomatrixserverlib.RespState,
event gomatrixserverlib.HeaderedEvent, haveEventIDs map[string]bool,
) error {
outliers, err := state.Events()
stateEvents, err := state.Events()
if err != nil {
return err
}
@ -55,18 +55,34 @@ func SendEventWithState(
var ires []InputRoomEvent
var stateIDs []string
for _, outlier := range outliers {
if haveEventIDs[outlier.EventID()] {
for _, stateEvent := range stateEvents {
if stateEvent.StateKey() == nil {
continue
}
if haveEventIDs[stateEvent.EventID()] {
continue
}
if stateEvent.Type() == event.Type() && *stateEvent.StateKey() == *event.StateKey() {
// If this event is an old state event that will be replaced by the
// given event, then store it as an outlier instead. We don't want
// to include it in the current room state as we will end up violating
// unique constraints in the state block, but we need the event to
// be stored as it may be referred to as an auth_event or prev_event.
ires = append(ires, InputRoomEvent{
Kind: KindOutlier,
Event: stateEvent.Headered(event.RoomVersion),
AuthEventIDs: stateEvent.AuthEventIDs(),
})
continue
}
ires = append(ires, InputRoomEvent{
Kind: KindNew,
Event: outlier.Headered(event.RoomVersion),
AuthEventIDs: outlier.AuthEventIDs(),
Event: stateEvent.Headered(event.RoomVersion),
AuthEventIDs: stateEvent.AuthEventIDs(),
HasState: true,
StateEventIDs: stateIDs,
})
stateIDs = append(stateIDs, outlier.EventID())
stateIDs = append(stateIDs, stateEvent.EventID())
}
ires = append(ires, InputRoomEvent{