liangchengyou / wow_english

  import 'package:flutter/cupertino.dart';
  import 'package:flutter_bloc/flutter_bloc.dart';

  import 'package:wow_english/common/request/dao/home_dao.dart';
  import 'package:wow_english/common/request/exception.dart';
  import 'package:wow_english/utils/loading.dart';

  
  part 'lesson_event.dart';
  part 'lesson_state.dart';
  
  class LessonBloc extends Bloc<LessonEvent, LessonState> {
  
    final int pageIndex;
  
    final PageController pageController;
  
    int _currentPageIndex = 0;
  
    int get currentPageIndex => _currentPageIndex;
  
    LessonBloc(this.pageIndex,this.pageController) : super(LessonInitial()) {
      _currentPageIndex = pageIndex;
      on<PageViewChangeIndexEvent>(_pageIndexChange);
    }
  

    Future<void> requestData() async {
      try {
        await loading(() async {
          HomeDao.courseModule();
          emit(LessonDataLoadState());
        });
      } catch (e) {
        if (e is ApiException) {
  
        }
      }
    }
  

    void _pageIndexChange(PageViewChangeIndexEvent event,Emitter<LessonState> emitter) async {
      _currentPageIndex = event.index;
      emitter(PageIndexChangeState());
    }
  
    @override
    Future<void> close() {
      pageController.dispose();
      return super.close();
    }
  }