YYHome/packages/cpt_property/lib/modules/sale/vm/property_sale_vm.dart

import 'package:plugin_platform/http/http_result.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:shared/utils/log_utils.dart';
import 'package:plugin_platform/engine/toast/toast_engine.dart';
import 'package:widgets/load_state_layout.dart';
import 'package:widgets/widget_export.dart';
import '../page/property_sale_state.dart';
import '../repository/property_sale_repository.dart';
part 'property_sale_vm.g.dart';

@riverpod
class PropertySaleVm extends _$PropertySaleVm {
  late PropertySaleRepository propertySaleRepository;
  bool _needShowPlaceholder = true; //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
  );

  PropertySaleState initState() {
    return PropertySaleState(
      list: [],
    );
  }

  @override
  PropertySaleState build() {
    // 引入数据仓库
    propertySaleRepository = ref.read(propertySaleRepositoryProvider);
    // 初始化状态
    PropertySaleState state = initState();
    // 初始化列表数据
    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("----property_news_vm-----initPageData");
    onRefresh();
  }

  // 上拉加载 更多
  Future loadMore() async {
    Log.d("----property_news_vm-----loadMore");
    // await Future.delayed(const Duration(seconds: 2));
    // if(state.list.length >= state.filterCount){
    //   return;
    // }else {
    //   int curPage = state.curPage + 1;
    //   state = state.copyWith(curPage: curPage,);
    //   getListData();
    // }
    // 检查 curPage 是否为 null，并初始化为 1
    int newCurPage = state.curPage ?? 1;
    state = state.copyWith(curPage: ++newCurPage);
    getListData();
  }


  // 下拉刷新
  Future onRefresh() async {
    Log.d("----property_news_vm-----onRefresh ");

    // await Future.delayed(const Duration(seconds: 2));
    state = state.copyWith(curPage: 1);
    getListData();
  }

  // 重试请求
  Future retryRequest() async {
    state = state.copyWith(curPage: 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--${state.curPage}---");
    //   try {
    //     //请求网络
    //     Map<String, dynamic>  params = {
    //       "curPage": state.curPage,
    //       "pageSize": state.pageSize,
    //     };
    //     Log.d("请求参数------$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,
        "title": "18 Sep 2024 BIK 39#09-XX 1337 psd 1001 sqft",
        "price": "\$1.338 M",
      },
      {
        "id": 2,
        "title": "18 Sep 2024 BIK 39#09-XX 1337 psd 1001 sqft",
        "price": "\$1.338 M",
      },
    ];

    if (state.curPage == 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);
      refreshController.finishLoad();
      state = state.copyWith(list: allList);
    }

    // 最后赋值
    _needShowPlaceholder = false;
  }

}