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Resolve state

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This commit is contained in:
Neil Alexander 2020-10-14 11:52:32 +01:00
parent 8fce60c746
commit 077a23fea0
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GPG key ID: A02A2019A2BB0944
1 changed files with 19 additions and 1 deletions
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20
roomserver/internal/query/query.go
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@ -49,6 +49,7 @@ func (r *Queryer) QueryLatestEventsAndState(
}
// QueryStateAfterEvents implements api.RoomserverInternalAPI
// nolint:gocyclo
func (r *Queryer) QueryStateAfterEvents(
ctx context.Context,
request *api.QueryStateAfterEventsRequest,
@ -81,7 +82,6 @@ func (r *Queryer) QueryStateAfterEvents(
var stateEntries []types.StateEntry
if len(request.StateToFetch) == 0 {
// Look up all of the current room state.
// TODO: This can return duplicate state-key tuples, is this a problem?
stateEntries, err = roomState.LoadCombinedStateAfterEvents(
ctx, prevStates,
)
@ -100,6 +100,24 @@ func (r *Queryer) QueryStateAfterEvents(
return err
}
if len(request.PrevEventIDs) > 1 && len(request.StateToFetch) == 0 {
var authEventIDs []string
for _, e := range stateEvents {
authEventIDs = append(authEventIDs, e.AuthEventIDs()...)
}
authEventIDs = util.UniqueStrings(authEventIDs)
authEvents, err := getAuthChain(ctx, r.DB.EventsFromIDs, authEventIDs)
if err != nil {
return fmt.Errorf("getAuthChain: %w", err)
}
stateEvents, err = state.ResolveConflictsAdhoc(info.RoomVersion, stateEvents, authEvents)
if err != nil {
return fmt.Errorf("state.ResolveConflictsAdhoc: %w", err)
}
}
for _, event := range stateEvents {
response.StateEvents = append(response.StateEvents, event.Headered(info.RoomVersion))
}