huixiang_app/lib/community/headlines/article_page.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:huixiang/community/headlines/headlines_banner.dart';
import 'package:huixiang/community/headlines/headlines_collection.dart';
import 'package:huixiang/main.dart';
import 'package:huixiang/retrofit/data/article.dart';
import 'package:huixiang/retrofit/data/banner.dart';
import 'package:huixiang/retrofit/data/base_data.dart';
import 'package:huixiang/retrofit/data/brand.dart';
import 'package:huixiang/retrofit/data/category_select_list.dart';
import 'package:huixiang/retrofit/data/collect_class_list.dart';
import 'package:huixiang/retrofit/data/course_list.dart';
import 'package:huixiang/retrofit/data/headlines_list.dart';
import 'package:huixiang/retrofit/data/headlines_list_details.dart';
import 'package:huixiang/retrofit/data/page.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:flutter_screenutil/flutter_screenutil.dart';
import 'package:huixiang/view_widget/store_title_tab.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'article_list.dart';

class ArticlePage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _ArticlePage();
  }
}

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

  ApiService apiService;
  List<GlobalKey> globaKeys = [];
  List<Brand> brands = [];
  List<BannerData> bannerData = [];
  List<Article> articles = [];
  List<HeadlinesList> headlines = [];
  int pageNum = 1;

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

    eventBus.on<EventType>().listen((event) {
      print("object: ArticlePage");
      if (event.type < 3) {
        setState(() {});
      }
    });
    queryArticleList();
    queryHeadlinesBanner();
    queryHeadlinesList();
  }

  @override
  void dispose() {
    super.dispose();
    refreshController.dispose();
  }

  ///banner
  queryHeadlinesBanner() 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": "INFORMATION"},
    }).catchError((onError) {
      refreshController.refreshFailed();
    });
    if (baseData != null && baseData.isSuccess) {
      bannerData.clear();
      bannerData.addAll(baseData.data.records);
      refreshController.refreshCompleted();
    } else {
      refreshController.refreshFailed();
      // SmartDialog.showToast(baseData.msg, alignment: Alignment.center);
    }
    EasyLoading.dismiss();
  }

  ///文章列表
  queryArticleList() async {
    if (apiService == null) {
      SharedPreferences value = await SharedPreferences.getInstance();
      apiService = ApiService(
        Dio(),
        context: context,
        token: value.getString("token"),
      );
    }
    BaseData<PageInfo<Article>> baseData = await apiService.queryArticle({
      "pageNum": pageNum,
      "pageSize": 10,
      "searchKey": "",
      "state": 1,
      "type": 2
    }).catchError((onError){
      refreshController.refreshFailed();
      refreshController.loadFailed();
    });
    if (baseData != null && baseData.isSuccess) {
      refreshController.refreshCompleted();
      refreshController.loadComplete();
      if(pageNum == 1) {
        articles.clear();
      }
      articles.addAll(baseData.data.list);
      if (baseData.data.pageNum == baseData.data.pages) {
        refreshController.loadNoData();
      } else {
        pageNum += 1;
      }
      setState(() {});
    } else {
      refreshController.refreshFailed();
      refreshController.loadFailed();
    }
  }

  ///文章合集列表
  queryHeadlinesList() async {
    if (apiService == null) {
      SharedPreferences value = await SharedPreferences.getInstance();
      apiService = ApiService(
        Dio(),
        context: context,
        token: value.getString("token"),
      );
    }
    BaseData<List<HeadlinesList>> baseData = await apiService.headlinesList().catchError((onError) {});
    if (baseData != null && baseData.isSuccess) {
      setState(() {
        headlines.clear();
        headlines.addAll(baseData.data);
        headlines.forEach((element) {
          // collectCourse(element.id);
        });
      });
    }
    EasyLoading.dismiss();
  }

  _onRefresh(){
    queryHeadlinesBanner();
    queryHeadlinesList();//分类列表
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return
      Stack(
        children: [
          Positioned(
            child: Container(
              child: SmartRefresher(
                controller: refreshController,
                enablePullDown: true,
                enablePullUp: false,
                header: MyHeader(),
                physics: ClampingScrollPhysics(),
                onRefresh: _onRefresh,
                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,
          ),
          if (brands != null && brands.length > 0)
            Positioned(
              child: Container(
                color: Colors.white,
                child: StoreTitleTab(
                  brands,
                  globaKeys,
                  scrollController,
                  isScroll: true,
                ),
              ),
              top: 0,
              left: 0,
              right: 0,
            ),
        ],
      );
  }

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

      SizedBox(height: 28),

      ///头条合集列表
      HeadlinesCollection(headlines,articles),

      ///文章列表
      ArticleList(articles),


    ];

    return widgets;
  }

  @override
  bool get wantKeepAlive => true;
}