section_bloc.dart
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import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:wow_english/common/request/dao/lesson_dao.dart';
import 'package:wow_english/common/request/exception.dart';
import 'package:wow_english/common/request/dao/listen_dao.dart';
import 'package:wow_english/models/course_process_entity.dart';
import 'package:wow_english/utils/loading.dart';
import 'package:wow_english/utils/toast_util.dart';
import '../../../models/course_section_entity.dart';
import '../../../models/course_unit_entity.dart';
import '../../../utils/list_ext.dart';
part 'section_event.dart';
part 'section_state.dart';
class SectionBloc extends Bloc<SectionEvent, SectionState> {
PageController _pageController;
PageController get pageController => _pageController;
///当前页索引
int _currentPage = 0;
int get currentPage => _currentPage;
ScrollController _listController;
ScrollController get listController => _listController;
CourseUnitEntity _courseUnitEntity;
CourseUnitEntity get courseUnitEntity => _courseUnitEntity;
CourseUnitDetail _courseUnitDetail;
CourseUnitDetail get courseUnitDetail => _courseUnitDetail;
List<CourseSectionEntity>? _courseSectionDatas;
List<CourseSectionEntity>? get courseSectionDatas => _courseSectionDatas;
CourseProcessEntity? _processEntity;
CourseProcessEntity? get processEntity => _processEntity;
SectionBloc(this._courseUnitEntity, this._courseUnitDetail, this._pageController, this._listController) : super(LessonInitial()) {
on<RequestDataEvent>(_requestData);
on<RequestExitClassEvent>(_requestExitClass);
on<RequestEndClassEvent>(_requestEndClass);
on<RequestEnterClassEvent>(_requestEnterClass);
on<RequestVideoLessonEvent>(_requestVideoLesson);
on<CurrentUnitIndexChangeEvent>(_pageControllerChange);
}
void _requestData(RequestDataEvent event, Emitter<SectionState> emitter) async {
try {
await loading(() async {
_courseSectionDatas = await LessonDao.courseSection(courseUnitId: _courseUnitDetail.id!);
emitter(LessonDataLoadState());
});
} catch (e) {
if (e is ApiException) {
showToast(e.message.toString());
}
}
}
void _requestVideoLesson(RequestVideoLessonEvent event, Emitter<SectionState> emitter) async {
try {
await loading(() async {
_processEntity = await ListenDao.process(event.courseLessonId);
emitter(RequestVideoLessonState(event.courseLessonId,event.courseType));
});
} catch (e) {
if (e is ApiException) {
showToast(e.message??'请求失败,请检查网络连接');
}
}
}
void _requestEnterClass(RequestEnterClassEvent event,Emitter<SectionState> emitter) async {
try {
await loading(() async {
await ListenDao.enterClass(event.courseLessonId);
emitter(RequestEnterClassState(event.courseLessonId,event.courseType));
});
} catch (e) {
if (e is ApiException) {
showToast(e.message??'请求失败,请检查网络连接');
}
}
}
void _requestExitClass(RequestExitClassEvent event,Emitter<SectionState> emitter) async {
await ListenDao.exitClass(event.courseLessonId,event.currentStep);
}
void _requestEndClass(RequestEndClassEvent event,Emitter<SectionState> emitter) async {
final obj = await ListenDao.endClass(event.courseLessonId,event.currentStep);
if (event.autoNextSection) {
final nextCourseSection = getNextCourseSectionBySort(int.parse(event.courseLessonId));
///进入课堂
add(RequestEnterClassEvent(nextCourseSection!.id.toString() ?? '', nextCourseSection.courseType));
}
}
void _pageControllerChange(CurrentUnitIndexChangeEvent event,
Emitter<SectionState> emitter) async {
_currentPage = event.unitIndex;
emitter(CurrentPageIndexState());
}
// 未锁定的页数
int unlockPageCount() {
return _courseUnitEntity.courseUnitVOList?.indexWhereOrNull((element) => element.lock == true) ?? 1;
}
CourseSectionEntity? getNextCourseSectionBySort(int courseLessonId) {
final curCourseSectionEntity = _courseSectionDatas?.firstWhere((element) => element.id == courseLessonId);
final curSort = curCourseSectionEntity?.sortOrder ?? 0;
CourseSectionEntity? nextCourseSectionEntity = _courseSectionDatas?.firstWhere((element) => element.sortOrder == curSort + 1);
if (nextCourseSectionEntity != null) {
return nextCourseSectionEntity;
} else {
///跨unit选lesson
final curCourseUnitDetail = _courseUnitEntity.courseUnitVOList?.firstWhere((element) => element.id == curCourseSectionEntity?.courseUnitId);
if (curCourseUnitDetail != null) {
final nextCourseUnitDetail = _courseUnitEntity.courseUnitVOList?.firstWhere((element) => element.sortOrder == 0);
if (nextCourseUnitDetail != null) {
///pageView翻页了，可能需要预加载 todo
return null;
} else {
///最后一个unit了
return null;
}
} else {
///找不到对应的unitDetail，理论上不可能
return null;
}
}
}
}