Method roomName

userapi/consumers/syncapi_streamevent.go:223–265

roomName returns the name in the event (if type==m.room.name), or looks it up in roomserver. If there is no name, m.room.canonical_alias is consulted. Returns an empty string if the room has no name.

(ctx context.Context, event *gomatrixserverlib.HeaderedEvent)

// m.room.canonical_alias is consulted. Returns an empty string if the
// room has no name.
func (s *OutputStreamEventConsumer) roomName(ctx context.Context, event *gomatrixserverlib.HeaderedEvent) (string, error) {
	if event.Type() == gomatrixserverlib.MRoomName {
		name, err := unmarshalRoomName(event)
		if err != nil {
			return "", err
		}

		if name != "" {
			return name, nil
		}
	}

	req := &rsapi.QueryCurrentStateRequest{
		RoomID:      event.RoomID(),
		StateTuples: []gomatrixserverlib.StateKeyTuple{roomNameTuple, canonicalAliasTuple},
	}
	var res rsapi.QueryCurrentStateResponse

	if err := s.rsAPI.QueryCurrentState(ctx, req, &res); err != nil {
		return "", nil
	}

	if eventS := res.StateEvents[roomNameTuple]; eventS != nil {
		return unmarshalRoomName(eventS)
	}

	if event.Type() == gomatrixserverlib.MRoomCanonicalAlias {
		alias, err := unmarshalCanonicalAlias(event)
		if err != nil {
			return "", err
		}

		if alias != "" {
			return alias, nil
		}
	}

	if event = res.StateEvents[canonicalAliasTuple]; event != nil {
		return unmarshalCanonicalAlias(event)
	}

	return "", nil
}

var (
	canonicalAliasTuple = gomatrixserverlib.StateKeyTuple{EventType: gomatrixserverlib.MRoomCanonicalAlias}