huixiang_app/lib/community/community_course.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:huixiang/data/banner.dart';
import 'package:huixiang/data/base_data.dart';
import 'package:huixiang/data/base_list_data.dart';
import 'package:huixiang/data/brand.dart';
import 'package:huixiang/data/category_select.dart';
import 'package:huixiang/data/collect_class.dart';
import 'package:huixiang/data/course.dart';
import 'package:huixiang/data/page.dart';
import 'package:huixiang/main.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/utils/event_type.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/view_widget/my_footer.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'community_view/class_list_view.dart';
import 'community_view/class_title_tab.dart';
import 'community_view/course_banner.dart';
import 'community_view/home_class.dart';

class CommunityCourse extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _CommunityCourse();
  }
}

class _CommunityCourse extends State<CommunityCourse>
    with SingleTickerProviderStateMixin, AutomaticKeepAliveClientMixin {
  final ScrollController scrollController = ScrollController();
  final RefreshController refreshController = RefreshController();

  ApiService? apiService;
  List<GlobalKey> globaKeys = [];
  List<Brand> brands = [];
  List<BannerData> bannerData = [];
  List<CategorySelect> classSelectList = [];
  List<Course> classList = [];
  List<Course> classTabList = [];
  List<CollectClass> collectList = [];
  int checkIndex = 0;
  Map<String, List<Course>> collectMap = new Map();

  @override
  void initState() {
    super.initState();

    eventBus.on<EventType>().listen((event) {
      print("object: CommunityCourse");
      if (event.type < 3) {
        setState(() {});
      }
    });
    if (apiService == null) {
      SharedPreferences.getInstance().then((value) {
        apiService = ApiService(
          Dio(),
          context: context,
          token: value.getString("token"),
        );
        _onRefresh();
      });
    }
  }

  ///banner
  queryCourseBanner() async {
    if (apiService == null) {
      SharedPreferences value = await SharedPreferences.getInstance();
      apiService = ApiService(
        Dio(),
        context: context,
        token: value.getString("token"),
      );
    }
    BaseData<PageInfo<BannerData>>? baseData = await apiService?.queryBanner({
      "model": {"type": "COURSE_BANNER"},
    }).catchError((onError) {
      refreshController.refreshFailed();
    });
    if (baseData?.isSuccess ?? false) {
      bannerData.clear();
      bannerData.addAll(baseData?.data?.records ?? []);
      refreshController.refreshCompleted();
    } else {
      refreshController.refreshFailed();
      // SmartDialog.showToast(baseData.msg, alignment: Alignment.center);
    }
    SmartDialog.dismiss();
  }

  ///课程分类列表
  classListAsync() async {
    BaseListData<CategorySelect>? baseData =
        await apiService?.categoryList().catchError((onError) {
      return BaseListData<CategorySelect>()..isSuccess = false;
    });
    if (baseData?.isSuccess ?? false) {
      setState(() {
        classSelectList = baseData!.data ?? [];
      });
      queryClassList("");
    }
    SmartDialog.dismiss();
  }

  ///课程列表
  queryClassList(categoryId) async {
    BaseData<PageInfo<Course>>? baseData = await apiService?.courseList({
      "categoryId": categoryId,
      "pageNum": 1,
      "pageSize": 10,
      "searchKey": "",
      "state": 0
    }).catchError((error) {
      if (categoryId == "") {
        refreshController.refreshFailed();
        refreshController.loadFailed();
      }
    });
    if (baseData?.isSuccess ?? false) {
      if (categoryId == "") {
        refreshController.refreshCompleted();
        refreshController.loadComplete();
        setState(() {
          classList.clear();
          classList.addAll(baseData?.data?.list ?? []);
        });
        if (classSelectList.length > 0)
          queryClassList(classSelectList[checkIndex].id);
      } else {
        setState(() {
          classTabList.clear();
          classTabList.addAll(baseData?.data?.list ?? []);
        });
      }
    }
  }

  ///课程的合集列表
  collectionList() async {
    BaseListData<CollectClass>? baseData =
        await apiService?.collectList().catchError((onError) {});
    if (baseData?.isSuccess ?? false) {
      setState(() {
        collectList.clear();
        collectList.addAll(baseData!.data ?? []);
        collectList.forEach((element) {
          collectCourse(element.id);
        });
      });
    }
    SmartDialog.dismiss();
  }

  ///合集包含的课程列表
  collectCourse(collectId) async {
    BaseListData<Course>? baseData =
        await apiService?.collect(collectId).catchError((error) {});
    if (baseData?.isSuccess ?? false) {
      setState(() {
        if (!collectMap.containsKey(collectId)) {
          collectMap[collectId] = [];
        }
        collectMap[collectId]?.clear();
        collectMap[collectId]?.addAll(baseData!.data ?? []);
      });
    }
  }

  _onRefresh() {
    queryCourseBanner();
    classListAsync();
    collectionList();
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Stack(
      children: [
        Positioned(
          child: Container(
            child: SmartRefresher(
              controller: refreshController,
              enablePullDown: true,
              enablePullUp: false,
              header: MyHeader(),
              footer: CustomFooter(
                builder: (context, mode) {
                  return MyFooter(mode);
                },
              ),
              onRefresh: () {
                setState(() {
                  _onRefresh();
                });
              },
              physics: BouncingScrollPhysics(),
              scrollController: scrollController,
              child: Container(
                child: SingleChildScrollView(
                  physics: NeverScrollableScrollPhysics(),
                  child: Container(
                    color: Color(0xFFF7F7F7),
                    margin: EdgeInsets.only(top: 16.h),
                    child: Column(
                      children: classChildItem(),
                    ),
                  ),
                ),
              ),
            ),
          ),
          bottom: 0,
          top: 0,
          left: 0,
          right: 0,
        ),
      ],
    );
  }

  List<Widget> classChildItem() {
    var widgets = <Widget>[
      ///课程banner
      CourseBanner(
        bannerData,
      ),

      SizedBox(height: 28.h),

      ///合集列表
      HomeClass(
        collectMap,
        collectList,
      ),

      ///课程导航栏
      ClassTitleTab(classSelectList, (index) {
        checkIndex = index;
        queryClassList(classSelectList[index].id);
      }),

      ///课程列表
      ClassListView(classTabList),
    ];

    return widgets;
  }

  @override
  bool get wantKeepAlive => true;
}