huixiang_app/lib/mine/roll_center_page.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/retrofit/data/base_data.dart';
import 'package:huixiang/retrofit/data/coupon.dart';
import 'package:huixiang/retrofit/data/page.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/view_widget/item_title.dart';
import 'package:huixiang/view_widget/my_appbar.dart';
import 'package:huixiang/view_widget/my_footer.dart';
import 'package:huixiang/view_widget/new_coupon_widget.dart';
import 'package:huixiang/view_widget/receive_success.dart';
import 'package:huixiang/view_widget/selector_store_dialog.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

class RollCenterPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _RollCenterPage();
  }
}

class _RollCenterPage extends State<RollCenterPage> {
  RefreshController? _refreshController;

  late ApiService apiService;

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

    SharedPreferences.getInstance().then((value) => {
          apiService = ApiService(Dio(),
              context: context, token: value.getString('token')),
          queryCoupon(),
        });
    _refreshController = RefreshController(initialRefresh: false);
  }

  int pageNum = 1;
  List<Coupon?> coupons = [];

  queryCoupon() async {
    BaseData<PageInfo<Coupon>> baseData = await apiService.queryCoupon({
      "centre": true,
      "pageNum": pageNum,
      "pageSize": 10,
      "searchKey": "",
      "state": 0
    }).catchError((onError) {
      _refreshController?.refreshFailed();
      _refreshController?.loadFailed();
    });
    if (pageNum == 1) coupons.clear();
    if (baseData != null && baseData.isSuccess!) {
      coupons.addAll(baseData.data!.list!);
      _refreshController?.refreshCompleted();
      _refreshController?.loadComplete();
      if (baseData.data!.pageNum == baseData.data!.pages) {
        _refreshController?.loadNoData();
      } else {
        pageNum += 1;
      }
      setState(() {});
    } else {
      _refreshController?.refreshFailed();
      _refreshController?.loadFailed();
    }
  }

  refreshCoupon() {
    pageNum = 1;
    queryCoupon();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: MyAppBar(
        title: S.of(context).lingquanzhongxin,
        titleColor: Colors.black,
        background: Color(0xFFF7F7F7),
        leadingColor: Colors.black,
      ),
      body: Container(
        child: Column(
          children: [
            ItemTitle(
              text: S.of(context).kelingqudeyouhuiquan,
              imgPath: "assets/image/icon_card_coupon.png",
              moreText: S.of(context).chakanwodekaquan,
              onTap: () {
                Navigator.of(context).pushNamed('/router/mine_card');
              },
            ),
            SizedBox(
              height: 23.h,
            ),
            Expanded(
              child: SmartRefresher(
                enablePullDown: true,
                enablePullUp: true,
                header: MyHeader(),
                footer: CustomFooter(
                  builder: (BuildContext context, LoadStatus? mode) {
                    return MyFooter(mode);
                  },
                ),
                controller: _refreshController!,
                onRefresh: refreshCoupon,
                onLoading: queryCoupon,
                physics: BouncingScrollPhysics(),
                child: ListView.builder(
                  itemBuilder: (context, position) {
                    return GestureDetector(
                      child: NewCouponWidget(
                        coupons[position],
                        (type) {
                          if (type == 1) {
                            receiveCoupon(coupons[position]!.id);
                          } else {
                            if (coupons[position]!.bizType == 5) {
                              Navigator.of(context).pushNamed(
                                  '/router/write_off_page',
                                  arguments: {
                                    "couponId": coupons[position]!.id,
                                    "coupon": coupons[position]!.toJson()
                                  });
                            } else {
                              showStoreSelector(coupons[position]!.storeList);
                            }
                          }
                        },
                        () {
                          setState(() {
                            coupons[position]!.isEx = !coupons[position]!.isEx!;
                          });
                        },
                        type: 1,
                      ),
                    );
                  },
                  itemCount: coupons != null ? coupons.length : 0,
                ),
              ),
            )
          ],
        ),
      ),
    );
  }

  receiveCoupon(couponId) async {
    BaseData baseData = await apiService.receiveCoupon(couponId);
    if (baseData != null && baseData.isSuccess!) {
      refreshCoupon();
      showAlertDialog();
    }
  }

  showStoreSelector(storeList) {
    showModalBottomSheet(
        context: context,
        backgroundColor: Colors.transparent,
        builder: (context) {
          return SelectorStoreWidget(storeList);
        });
  }

  showAlertDialog() {
    //显示对话框
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return ReceiveSuccess();
      },
    );
  }
}