enum LoadStatus { idle, loading, data, empty, error }

class LoadState<T> {
  final LoadStatus status;
  final T data;
  final String? errorMessage;

  const LoadState.idle(this.data)
    : status = LoadStatus.idle,
      errorMessage = null;

  const LoadState.loading(this.data)
    : status = LoadStatus.loading,
      errorMessage = null;

  const LoadState.data(this.data)
    : status = LoadStatus.data,
      errorMessage = null;

  const LoadState.empty(this.data)
    : status = LoadStatus.empty,
      errorMessage = null;

  const LoadState.error(this.data, this.errorMessage)
    : status = LoadStatus.error;

  bool get isIdle => status == LoadStatus.idle;

  bool get isLoading => status == LoadStatus.loading;

  bool get hasError => status == LoadStatus.error;

  bool get isEmpty => status == LoadStatus.empty;
}