YYHome/packages/cpt_community/lib/modules/community/news/news_vm.dart

import 'package:cs_resources/generated/assets.dart';
import 'package:domain/entity/newsfeed_news_entity.dart';
import 'package:flutter/cupertino.dart';
import 'package:plugin_platform/engine/toast/toast_engine.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:router/ext/auto_router_extensions.dart';
import 'package:shared/utils/ext_dart.dart';
import 'package:shared/utils/log_utils.dart';
import 'package:widgets/load_state_layout.dart';
import 'package:widgets/widget_export.dart';

import '../../../respository/newsfeed_news_repository.dart';
import '../../../router/page/community_page_router.dart';
import '../community_pageview_idx_data.dart';
import '../community_vm.dart';
import '../newsfeed_detail/newsfeed_detail_page.dart';
import 'news_state.dart';

part 'news_vm.g.dart';

@riverpod
class NewsVm extends _$NewsVm {
  late NewsFeedNewsRepository repositoryInstance;
  bool _needShowPlaceholder = false; //是否展示LoadingView

  // Refresh 控制器
  final EasyRefreshController refreshController = EasyRefreshController(
    controlFinishRefresh: true,  //允许刷新
    controlFinishLoad: true,   //允许加载
  );

  NewsState initState() {
    return NewsState(
      list: []
    );
  }

  @override
  NewsState build(){
    // 引入数据仓库
    repositoryInstance = ref.read(newsFeedNewsRepositoryProvider);
    final state = initState();
    Log.d("--------------------------build---------------------");

    return state;
  }

  //刷新页面状态
  void changeLoadingState(LoadState loadState, String? errorMsg) {
    state = state.copyWith(
        loadingState: loadState,
        errorMessage: errorMsg
    );
  }

  // 初始化页面数据
  initPageData() {
    Log.d("----news_vm-----initPageData   ${state.loadingState}");
    onRefresh();
  }

  // 上拉加载 更多
  Future loadMore() async {
    bool isShowing = await ref.read(communityVmProvider.notifier).isCurrentPageViewShowing(CommunityPageViewIdxData.news);
    if(isShowing){
      Log.d("----news_vm-----loadMore");
      // await Future.delayed(const Duration(seconds: 2));
      // if(state.list.length >= state.count){
      //   return;
      // }else {
      //   int page = state.page + 1;
      //   state = state.copyWith(page: page,);
      //   getListData();
      // }
      // 检查 page 是否为 null，并初始化为 1
      int newCurPage = state.page ?? 1;
      state = state.copyWith(page: ++newCurPage);
      getListData();
    }else {
      refreshController.finishRefresh();
    }
  }


  // 下拉刷新
  Future onRefresh() async {
    bool isShowing = await ref.read(communityVmProvider.notifier).isCurrentPageViewShowing(CommunityPageViewIdxData.news);
    if(isShowing){
      // 当前pageView 页面正处于显示状态
      Log.d("----forsale_vm-----onRefresh ");
      // await Future.delayed(const Duration(seconds: 2));
      state = state.copyWith(page: 1);
      getListData();
    }else {
      refreshController.finishRefresh();
    }
  }

  // 重试请求
  Future retryRequest() async {
    bool isShowing = await ref.read(communityVmProvider.notifier).isCurrentPageViewShowing(CommunityPageViewIdxData.news);
    if(isShowing){
      state = state.copyWith(page: 1);
      _needShowPlaceholder = true;
      getListData();
    }
  }


  // 获取list 列表数据
  Future getListData<T>() async {
    if (_needShowPlaceholder) {
      changeLoadingState(LoadState.State_Loading, null);
    }

    Log.d("加载listData数据---------------start--${state.page}---");
    //   try {
    //     //请求网络
    //     Map<String, dynamic>  params = {
    //       "page": state.page,
    //       "limit": state.limit,
    //     };
    //     Log.d("请求参数------$params");
    //     final result = await propertyNewsRepository.fetchPropertyNewsList(params);
    //     Log.d("请求完成结果------${result.data}");
    //     //校验成功失败
    //     if (result.isSuccess) {
    //       // state = state.copyWith(serverTime: result.data);
    //       state = state;
    //   handleList(listResult.data?.rows);
    //       ToastEngine.show("获取数据成功");
    //     } else {
    //   errorMessage = listResult.errorMsg;
    //   changeLoadingState(LoadState.State_Error);
    //       ToastEngine.show(result.errorMsg ?? "Network Load Error");
    //     }
    //   } catch (e) {
    //     ToastEngine.show("Error: $e");
    //   }

    // await Future.delayed(const Duration(milliseconds: 1500));
    // final List<Map<String, dynamic>> listData = [
    //   {
    //     'id':1,
    //     'avator': 'https://img1.baidu.com/it/u=3890726495,1572750319&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
    //     'title': 'William Jefferson',
    //     'isFollow': false,
    //     'content': 'She said YES and our lives changed.Thank you all for coming to my propose today.We hope everyone can ……[More]',
    //     'imageUrls': ['https://img2.baidu.com/it/u=3489233687,2364672159&fm=253&fmt=auto&app=120&f=JPEG?w=507&h=500','https://img2.baidu.com/it/u=3489233687,2364672159&fm=253&fmt=auto&app=120&f=JPEG?w=507&h=500','https://img2.baidu.com/it/u=3489233687,2364672159&fm=253&fmt=auto&app=120&f=JPEG?w=507&h=500'],
    //     'time': 'June 17,2016 at 7:23 p.m.',
    //     'isLike': true,
    //     'likeno': 12
    //   },
    //   {
    //     'id':2,
    //     'avator': 'https://img1.baidu.com/it/u=3890726495,1572750319&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
    //     'title': 'William fdsaf的飞洒发生的',
    //     'isFollow': true,
    //     'content': 'She said YES and our lives changed.Thank you all for coming to my propose today.We hope everyone can ……[More]',
    //     'imageUrls': [],
    //     'time': 'June 17,2016 at 7:23 p.m.',
    //     'isLike': true,
    //     'likeno': 12
    //   },
    //   {
    //     'id':3,
    //     'avator': 'https://img1.baidu.com/it/u=3890726495,1572750319&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
    //     'title': 'Fsjfkds  dfsk',
    //     'isFollow': false,
    //     'content': 'She said YES and our lives changed.Thank you all for coming to my propose today.We hope everyone can ……[More]',
    //     'imageUrls': [],
    //     'time': 'June 17,2016 at 7:23 p.m.',
    //     'isLike': false,
    //     'likeno': 12
    //   },
    //   {
    //     'id':4,
    //     'avator': 'https://img1.baidu.com/it/u=3890726495,1572750319&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
    //     'title': 'Fsjfkds  dfsk',
    //     'isFollow': false,
    //     'content': 'She said YES and our lives changed.Thank you all for coming to my propose today.We hope everyone can ……[More]',
    //     'imageUrls': [],
    //     'time': 'June 17,2016 at 7:23 p.m.',
    //     'isLike': false,
    //     'likeno': 12
    //   },
    //   {
    //     'id':5,
    //     'avator': 'https://img1.baidu.com/it/u=3890726495,1572750319&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
    //     'title': 'Fsjfkds  dfsk',
    //     'isFollow': false,
    //     'content': 'She said YES and our lives changed.Thank you all for coming to my propose today.We hope everyone can ……[More]',
    //     'imageUrls': [],
    //     'time': 'June 17,2016 at 7:23 p.m.',
    //     'isLike': false,
    //     'likeno': 12
    //   },
    //   {
    //     'id':6,
    //     'avator': 'https://img1.baidu.com/it/u=3890726495,1572750319&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
    //     'title': 'Fsjfkds  dfsk',
    //     'isFollow': false,
    //     'content': 'She said YES and our lives changed.Thank you all for coming to my propose today.We hope everyone can ……[More]',
    //     'imageUrls': [],
    //     'time': 'June 17,2016 at 7:23 p.m.',
    //     'isLike': false,
    //     'likeno': 12
    //   },
    //   {
    //     'id':7,
    //     'avator': 'https://img1.baidu.com/it/u=3890726495,1572750319&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
    //     'title': '放大发大水',
    //     'isFollow': false,
    //     'content': 'She said YES and our lives changed.Thank you all for coming to my propose today.We hope everyone can ……[More]',
    //     'imageUrls': [],
    //     'time': 'June 17,2016 at 7:23 p.m.',
    //     'isLike': false,
    //     'likeno': 12
    //   },
    // ];
    //
    // if (state.page == 1) {
    //   //刷新的方式
    //   state = state.copyWith(list: listData);
    //   refreshController.finishRefresh();
    //   // //更新展示的状态
    //   changeLoadingState(LoadState.State_Success, null);
    // } else {
    //   //加载更多
    //   final allList = state.list;
    //   allList?.addAll(listData);
    //   state = state.copyWith(list: allList);
    //   refreshController.finishLoad();
    //
    // }
    //
    // // 最后赋值
    // _needShowPlaceholder = false;

    try {
      //请求网络
      Map<String, dynamic>  params = {
        "page": state.page,
        "limit": state.limit,
      };
      Log.d("请求参数------$params");
      final result = await repositoryInstance.fetchNewsList(params);
      //校验成功失败
      if (result.isSuccess) {
        handlerResultList((result.data  as NewsfeedNewsEntity).list);
      } else {
        String errorMessage = result.errorMsg!;
        changeLoadingState(LoadState.State_Error, errorMessage);
        ToastEngine.show(result.errorMsg ?? "Network Load Error");
      }
    } catch (e) {
      ToastEngine.show("Error: $e");
    }
  }


  void handlerResultList(List<NewsfeedNewsList>? list) {
    if (list != null && list.isNotEmpty) {
      //有数据，判断是刷新还是加载更多的数据
      if (state.page == 1) {
        //刷新的方式
        state.list!.clear();
        state.list!.addAll(list.map((item) => item.toJson()).toList());
        refreshController.finishRefresh();

        //更新展示的状态
        changeLoadingState(LoadState.State_Success, null);
      } else {
        //加载更多
        final allList = state.list;
        state = state.copyWith(list: allList);
        refreshController.finishLoad();
      }
    } else {
      if (state.page == 1) {
        //展示无数据的布局
        state.list!.clear();
        changeLoadingState(LoadState.State_Empty, null);
        refreshController.finishRefresh();
      } else {
        //展示加载完成，没有更多数据了
        if(state.list!.length == 0){
          changeLoadingState(LoadState.State_Empty, null);
        }else {
          if(_needShowPlaceholder){
            changeLoadingState(LoadState.State_Success, null);
          }
        }
        refreshController.finishLoad(IndicatorResult.noMore);
      }
    }
  }

  // 点赞/取消点赞
  Future handlerLikeClick(int id, bool isLike, int itemidx) async {
    try {
      final result = await repositoryInstance.fetchLikeClick({
        "id": id,
      });
      if (result.isSuccess) {
        //重新赋值data或list
        // final json = result.getDataJson();
        // var data = NewsfeedNewsEntity.fromJson(json!);
        //重新赋值data或list
        // state.list![id].liked = data.list![0].liked;
        // state.list![id].likeno = data.list![0].likeno;
        final String toastMsg = isLike ? "Cancel successfully": "Liked successfully";
        ToastEngine.show(toastMsg);
        // 修改 state.list[itemIdx] 中的 like 状态 和 likes_count
        state.list![itemidx]['liked'] = !isLike;
        if(isLike){
          // 取消点赞
          if(state.list![itemidx]['likes_count']>0){
            state.list![itemidx]['likes_count'] = state.list![itemidx]['likes_count'] - 1;
          }
        }else {
          state.list![itemidx]['likes_count'] = state.list![itemidx]['likes_count'] + 1;
        }
        //重新赋值data或list
        changeLoadingState(LoadState.State_Success, null);
        return true;
      }else {
        return false;
      }
    }catch(error) {
      return false;
    }
  }

  // 点击 like comments  share
  Future<bool?> handlerClickActionBtn(String? actionStr, Map<String, dynamic> item, int itemidx) async{
    final id = item['id'];
    final liked = item.getValue('liked', false);
    switch (actionStr) {
      case 'like':
        return await handlerLikeClick(id, liked, itemidx);
      case 'comments':
        Log.d("点击了 评论");
        handlerGotoDetail(null, id);
        break;
      case 'share':
        Log.d("点击了 分享");
        handlerGotoDetail(null, id);
        break;
      default:
        Log.d("点击了卡片");
        handlerGotoDetail(null, id);
        break;
    }
  }
  Future handlerFollow(BuildContext context, bool isFollow) async{
    Log.d("点击了 关注");
    // try {
    //   //请求网络
    //   Map<String, dynamic>  params = {
    //
    //   };
    //   Log.d("请求参数------$params");
    //   final result = await repositoryInstance.fetchNewsList(params);
    //   //校验成功失败
    //   if (result.isSuccess) {
    //     handlerResultList((result.data  as NewsfeedNewsEntity).list);
    //   } else {
    //     String errorMessage = result.errorMsg!;
    //     changeLoadingState(LoadState.State_Error, errorMessage);
    //     ToastEngine.show(result.errorMsg ?? "Network Load Error");
    //   }
    // } catch (e) {
    //   ToastEngine.show("Error: $e");
    // }
  }
  // 去详情页面
  void handlerGotoDetail(BuildContext? context, int id){
    Log.d("去详情页面");
    appRouter.push(NewsfeedDetailPageRoute(id: id, type:'news'));
  }
}