liangchengyou / wow_english

  import 'package:flutter/cupertino.dart';

  import 'package:flutter_bloc/flutter_bloc.dart';

  import 'package:flutter_easyloading/flutter_easyloading.dart';

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

  import 'package:wow_english/models/course_module_entity.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;
  

    List<CourseModuleEntity?> _listData = [];

    List<CourseModuleEntity?> get listData => _listData;
  
    LessonBloc(this.pageIndex, this.pageController) : super(LessonInitial()) {

      _currentPageIndex = pageIndex;
      on<PageViewChangeIndexEvent>(_pageIndexChange);
    }
  

    Future<void> requestData() async {
      try {
        await loading(() async {

          var list = await HomeDao.courseModule();
          if (list?.isNotEmpty == true) {
            _listData = list!;
            emit(LessonDataLoadState());
          } else {
            EasyLoading.showToast("数据获取失败！");
          }

        });
      } 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();
    }
  }