can I use multiple repositories in flutter bloc pattern

Hi I am new with flutter and trying to implement bloc pattern. I have checked so many tutorials in those tutorials. this is one of them. they always using a single repository for small sample project and if we use single repository in a large project then the repository will become very messy so I have a doubt

can I use multiple repository with bloc pattern If yes then how If no then what's is best way to manage repository so that it won't become messy?

Solution 1:

There's none limiting you on creating multiple repositories for your BloC. Repositories in a BloC pattern are just classes containing Providers that will be called through Bloc. For example

class Repository {
  final albumApiProvider = AlbumApiProvider();

  Future<List<AlbumModel>> fetchAllAlbums() => albumApiProvider.fetchAlbum();
}

...and in a BloC, that Repository can be called such as

class AlbumsBloc {
  final _repository = Repository();
  final _albumFetcher = StreamController<List<AlbumModel>>();

  Stream<List<AlbumModel>> get allAlbums => _albumFetcher.stream;

  fetchAlbum() async {
    List<AlbumModel> listAlbums = await _repository.fetchAllAlbums();
    _albumFetcher.sink.add(listAlbums);
  }
  ...
}

Here's a complete working sample of an app using a simple BloC pattern that you can try out.