loading_status.dart

extension LoadingStatusStreamExtension<T> on Stream<T> {
  DataStream<T> withLoading(LoadingStatus loadingStatus) {
    return combineLatest<bool, StreamData<T>>(loadingStatus.listen(), 
      (data, isLoading) {
        if (isLoading) {
          return LoadingData(data);
        }
        return ReadyData(data);
      });
  }
}