all.dart

//////////////////////////////////////////////////////////////////////
/// Código do main.dart
//////////////////////////////////////////////////////////////////////

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return BlocProvider(
      blocs: [
        Bloc((i) => VideoSearchBloc())
      ],
      child: MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: HomeScreen(),
      ),
    );
  }
}


//////////////////////////////////////////////////////////////////////
// codigo do video_search_bloc.dart
//////////////////////////////////////////////////////////////////////
class VideoSearchBloc implements BlocBase{

  List<Video> videos = [];

  final _videosController = StreamController<List<Video>>();
  Stream<List<Video>> get outVideos => _videosController.stream;

  final _searchController = StreamController<String>();
  Sink get inSearch => _searchController.sink;

  VideoSearchBloc(){
    _searchController.stream.listen(_search);
  }

  _search(query) async{
    videos = await API().search(search: query);
    _videosController.sink.add(videos);
    print(videos);
  }

  @override
  void addListener(listener) {
    // TODO: implement addListener
  }
  @override
  void dispose() {
    _videosController.close();
    _searchController.close();
  }
  @override
  // TODO: implement hasListeners
  bool get hasListeners => null;
  @override
  void notifyListeners() {
    // TODO: implement notifyListeners
  }
  @override
  void removeListener(listener) {
    // TODO: implement removeListener
  }
}

//////////////////////////////////////////////////////////////////////
// codigo do StreamBuilder dentro do HomeScreen
//////////////////////////////////////////////////////////////////////
StreamBuilder(
  stream: BlocProvider.getBloc<VideoSearchBloc>().outVideos,
  initialData: List<Video>(),
  builder: (context, snapshot){
    print('grite!!');
    print(BlocProvider.getBloc<VideoSearchBloc>().outVideos);
    if(snapshot.hasData){
      //print('we have data!');
      List<Video> list = snapshot.data;
      return ListView.separated(
          physics: BouncingScrollPhysics(),
          separatorBuilder: (context, i){
            return Divider(height: 2, color: Colors.grey);
          },
          itemCount: list.length,
          itemBuilder: (context, index){
            return Column(
              children: <Widget>[
                Image.network(list[index].thumb),
                Text(list[index].title, style: TextStyle(fontSize:16, color: Colors.white),),
                Text(list[index].channel, style: TextStyle(color: Colors.white),),
                SizedBox(height: 16)
              ],
            );
          }
      );
    }
    return Center(child: CircularProgressIndicator());
  },
)