mapEventToState method

  1. @override
Stream<FastAppFeaturesBlocState> mapEventToState(
  1. FastAppFeaturesBlocEvent event
)
override

Must be implemented when a class extends BidirectionalBloc. mapEventToState is called whenever an event is added and will convert that event into a new BloC state. It can yield zero, one or several states for an event.

Implementation

@override
Stream<FastAppFeaturesBlocState> mapEventToState(
  FastAppFeaturesBlocEvent event,
) async* {
  final payload = event.payload;
  final type = event.type;

  _logger.debug('Event received: $type');

  if (type == FastAppFeaturesBlocEventType.init) {
    yield* handleInitEvent();
  } else if (type == FastAppFeaturesBlocEventType.initialized) {
    if (payload is FastAppFeaturesBlocEventPayload) {
      assert(payload.features != null);
      yield* handleInitializedEvent(payload.features!);
    }
  } else if (isInitialized) {
    switch (type) {
      case FastAppFeaturesBlocEventType.retrieveFeatures:
        yield* handleRetrieveFeaturesEvent();
      case FastAppFeaturesBlocEventType.featuresRetrieved:
        if (payload is FastAppFeaturesBlocEventPayload) {
          assert(payload.features != null);
          yield* handleFeaturesRetrievedEvent(payload.features!);
        }

      case FastAppFeaturesBlocEventType.enableFeature:
        if (payload is FastAppFeaturesBlocEventPayload) {
          assert(payload.feature != null);
          yield* handleEnableFeaturesEvent([payload.feature!]);
        }

      case FastAppFeaturesBlocEventType.enableFeatures:
        if (payload is FastAppFeaturesBlocEventPayload) {
          assert(payload.features != null);
          yield* handleEnableFeaturesEvent(payload.features!);
        }

      case FastAppFeaturesBlocEventType.disableFeature:
        if (payload is FastAppFeaturesBlocEventPayload) {
          assert(payload.feature != null);
          yield* handleDisableFeaturesEvent([payload.feature!]);
        }

      case FastAppFeaturesBlocEventType.disableFeatures:
        if (payload is FastAppFeaturesBlocEventPayload) {
          assert(payload.features != null);
          yield* handleDisableFeaturesEvent(payload.features!);
        }

      default:
        assert(false, 'FastAppFeaturesBloc is not initialized yet.');
    }
  } else {
    assert(false, 'FastAppFeaturesBloc is not initialized yet.');
  }
}