huixiang_app/lib/community/community_child_page.dart

import 'dart:convert';

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:huixiang/community/community_view/community_dynamic.dart';
import 'package:huixiang/data/article.dart';
import 'package:huixiang/data/base_data.dart';
import 'package:huixiang/data/comunity_comment.dart';
import 'package:huixiang/data/page.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/view_widget/my_footer.dart';
import 'package:huixiang/view_widget/no_data_view.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../utils/flutter_utils.dart';
import '../utils/font_weight.dart';

class CommunityChildPage extends StatefulWidget {
  final String typeStr;
  final Function onScroll;
  final Function toRelease;

  CommunityChildPage(Key key, this.typeStr, this.onScroll, this.toRelease)
      : super(key: key);

  @override
  State<StatefulWidget> createState() {
    return CommunityChildPageState();
  }
}

class CommunityChildPageState extends State<CommunityChildPage>
    with AutomaticKeepAliveClientMixin {
  RefreshController refreshController = RefreshController();
  ApiService? apiService;
  int pageNum = 1;
  String? userId;
  bool isLoadMore = false;
  bool isRefresh = true;
  bool isLoadingData = false;
  ScrollController sc = ScrollController();
  List<Article> articles = [];
  int _currentIndex = 0;

  @override
  void initState() {
    super.initState();
    sc.addListener(() {
      widget.onScroll();
      if (sc.offset >= 500) {
        _currentIndex =1;
      }else if(sc.offset <= 500){
        _currentIndex = 0;
      }
    });
    onRefresh();
  }

  onRefresh() async {
    setState(() {});
  }

  ///动态列表
  queryCommunity(String? searchKey) async {
    if (!isRefresh) {
      isRefresh = true;
      return;
    }
    if (isLoadingData) {
      return;
    }
    isLoadingData = true;
    if (apiService == null) {
      SharedPreferences value = await SharedPreferences.getInstance();
      userId = value.getString('userId');
      apiService = ApiService(Dio(),
          context: context,
          token: value.getString("token"),
          showLoading: false);
    }
    if (isLoadMore) {
      pageNum += 1;
      isLoadMore = false;
    } else if (searchKey == null) pageNum = 1;
    BaseData<PageInfo<ComunityComment>>? baseData = await apiService?.trendList({
      "mid": "",
      "onlyFollow": widget.typeStr == "关注" ? true : false,
      "onlyMe": false,
      "pageNum": searchKey == null ? pageNum : 1,
      "pageSize": 10,
      "searchKey": searchKey ?? ""
    }).catchError((error) {
      SmartDialog.showToast(AppUtils.dioErrorTypeToString(error.type),
          alignment: Alignment.center);
    });
    if (baseData?.isSuccess ?? false) {
      if (baseData?.data?.list?.isNotEmpty ?? false)
        articles.forEach((element) {
          if (element.id == searchKey) {
            element.content = jsonEncode(baseData?.data?.list?[0].subjectInfo);
            element.mainTitle = baseData?.data?.list?[0].subject;
            element.followed = baseData?.data?.list?[0].selfFollow;
            element.liked = baseData?.data?.list?[0].selfLike;
            element.authorHeadImg = baseData?.data?.list?[0].memberInfo?.avatar;
            element.authorName = baseData?.data?.list?[0].memberInfo?.nickname;
            element.location = baseData?.data?.list?[0].location;
            element.createTime = baseData?.data?.list?[0].createTime;
            element.author = baseData?.data?.list?[0].memberInfo?.mid;
            element.viewers = baseData?.data?.list?[0].viewers;
            element.likes = baseData?.data?.list?[0].likes;
            element.comments = baseData?.data?.list?[0].comments;
            this.isRefresh = false;
            setState(() {});
          }
        });
        }

    isLoadingData = false;
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return FutureBuilder(
      future: queryCommunity(null),
      builder: (context, position) {
        return Stack(
          alignment: Alignment.bottomRight,
          children: [
            SmartRefresher(
              controller: refreshController,
              enablePullDown: true,
              enablePullUp: (articles.length == 0) ? false:true,
              physics: BouncingScrollPhysics(),
              header: MyHeader(),
              footer: CustomFooter(
                builder: (context, mode) {
                  return MyFooter(mode);
                },
              ),
              onRefresh: onRefresh,
              onLoading: () {
                isLoadMore = true;
                setState(() {});
              },
              child: (articles.length == 0)
                  ? NoDataView(
                      src: "assets/image/guan_zhu.webp",
                      isShowBtn: false,
                      text: "目前暂无添加关注，可在推荐中关注自己喜欢的人哦~",
                      fontSize: 16.sp,
                      margin: EdgeInsets.only(
                          top: 120.h, left: 60.w, right: 60.w,
                      ),
                    )
                  : ListView.builder(
                      controller: sc,
                      shrinkWrap: true,
                      itemBuilder: (context, position) {
                        return InkWell(
                          child: CommunityDynamic(
                            articles[position],
                            0,
                            userId: userId,
                            isList: true,
                            exitFull: () {
                              // setState(() {
                              //   onRefresh();
                              // });

                              queryCommunity(articles[position].id);
                            },
                          ),
                          onTap: () {
                            Navigator.of(context).pushNamed(
                              '/router/community_details',
                              arguments: {
                                "businessId": articles[position].id,
                                "userId": userId,
                              },
                            ).then((value) {
                              // onRefresh();
                              // setState(() {});
                              queryCommunity(articles[position].id);
                            });
                            // setState(() {});

                          },
                        );
                      },
                      itemCount: articles.length,
                    ),
            ),
            GestureDetector(
              onTap: () {
                widget.toRelease();
              },
              child: Container(
                margin: EdgeInsets.only(bottom: 31, right: 14),
                child: Image.asset(
                  "assets/image/fa_bu.webp",
                  width: 55,
                  height: 55,
                ),
              ),
            ),
            if(_currentIndex == 1)
            GestureDetector(
              onTap: () {
                sc.jumpTo(0);
                setState(() {});
              },
              child: Container(
                margin: EdgeInsets.only(bottom:120.h, right: 14.w),
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(100),
                  color: Colors.white,
                ),
                height:48,
                width: 48,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.center,
                  children: [
                    Icon(Icons.arrow_upward,size: 16,color: Color(0xFF808080),),
                    Text(
                      "顶部",
                      textAlign: TextAlign.center,
                      style: TextStyle(
                        color: Color(0xFF808080),
                        fontSize: 14.sp,
                        fontWeight: MyFontWeight.regular,
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ],
        );
      },
    );
  }

  @override
  bool get wantKeepAlive => true;
}