app-starlock/lib/login/selectCountryRegion/selectCountryRegion_page.dart

import 'package:azlistview/azlistview.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';
import 'package:star_lock/login/selectCountryRegion/common/countryRegionEntity.dart';
import 'package:star_lock/network/api_repository.dart';
import 'package:star_lock/tools/baseGetXController.dart';

import '../../app_settings/app_colors.dart';
import '../../tools/keySearchWidget.dart';
import '../../tools/titleAppBar.dart';
import '../../translations/trans_lib.dart';
import 'common/index.dart';

class SelectCountryRegionPage extends StatefulWidget {
  const SelectCountryRegionPage({Key? key}) : super(key: key);

  @override
  State<SelectCountryRegionPage> createState() => _SelectCountryRegionPageState();
}

class _SelectCountryRegionPageState extends State<SelectCountryRegionPage> {
  List<CountryRegionModel> countriesList = <CountryRegionModel>[];
  List<CountryRegionModel> topCountriesList = <CountryRegionModel>[];
  TextEditingController searchController = TextEditingController();

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

    SuspensionUtil.setShowSuspensionStatus(countriesList.cast<ISuspensionBean>());
    Future.delayed(const Duration(milliseconds: 20), getCountriesListRequest);
  }

  //请求国家/地区json文件
  Future<void> getCountriesListRequest() async {
    final CountryRegionEntity entity = await ApiRepository.to.getCountryRegion('1');
    countriesList.clear();
    if (entity.errorCode!.codeIsSuccessful) {
      countriesList.addAll(entity.dataList!);
      for(final CountryRegionModel model in countriesList){
        if(model.name! == '中国'){
          topCountriesList.add(model);
          break;
        }
      }
      _handleList(countriesList);
    }
  }

  Future<String> loadJsonFromAssets(String assetsPath) async {
    return await rootBundle.loadString(assetsPath);
  }

  void _handleList(List<CountryRegionModel> list) {
    if (list.isEmpty) {
      return;
    }
    for (int i = 0, length = list.length; i < length; i++) {
      final CountryRegionModel countryModel = list[i];
      final String tag = countryModel.group!;
      if (RegExp('[A-Z]').hasMatch(tag)) {
        list[i].tagIndex = tag;
      } else {
        list[i].tagIndex = '#';
      }
    }
    // A-Z sort.
    SuspensionUtil.sortListBySuspensionTag(list);
    // show sus tag.
    SuspensionUtil.setShowSuspensionStatus(list);

    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: (){
        FocusScope.of(context).unfocus();
      },
      child: Scaffold(
        resizeToAvoidBottomInset: false,
        backgroundColor: const Color(0xFFFFFFFF),
        appBar: TitleAppBar(
          barTitle:
              '选择国家/地区'.tr,
          haveBack: true,
          backgroundColor: AppColors.mainColor,
        ),
        body: Column(
          children: <Widget>[
            KeySearchWidget(
              editingController: searchController,
              backgroundColor: AppColors.mainBackgroundColor,
              onSubmittedAction: () {
                if(searchController.text.isEmpty){
                  getCountriesListRequest();
                }else{
                  final List<CountryRegionModel> searchList = <CountryRegionModel>[];
                  for (int i = 0, length = countriesList.length; i < length; i++) {
                    final CountryRegionModel countryModel = countriesList[i];
                    if(countryModel.name!.contains(searchController.text) || countryModel.code!.contains(searchController.text)){
                      searchList.add(countryModel);
                    }
                  }
                  countriesList= searchList;
                  _handleList(searchList);
                }
                setState(() {});
              },
            ),
            SizedBox(height:20.h),
            Visibility(
                visible: searchController.text.isEmpty,
                child: Utils.getSusItem(context, '★')
            ),
            if (countriesList.isNotEmpty) Visibility(
                visible: searchController.text.isEmpty,
                child: Utils.getListItem(context, topCountriesList[0], () {
                  final CountryRegionModel model = topCountriesList[0];
                  final Map<String, dynamic> resultMap = {};
                  resultMap['code'] = model.code ?? '';
                  resultMap['countryId'] = model.countryId.toString() ?? '';
                  resultMap['countryName'] = model.name ?? '' ;
                  Navigator.pop(context, resultMap);
                })
            ) else Container(),
            Expanded(
              child: AzListView(
                data: countriesList,
                itemCount: countriesList.length,
                itemBuilder: (BuildContext context, int index) {
                  final CountryRegionModel model = countriesList[index];
                  return Utils.getListItem(context, model, () {
                    final Map<String, dynamic> resultMap = {};
                    resultMap['code'] = model.code;
                    resultMap['countryId'] = model.countryId.toString();
                    resultMap['countryName'] = model.name;
                    // AppLog.log("model.name:${model.name} model.code:${model.code} model.countryId:${model.countryId} model.flag:${model.flag} model.group:${model.group} model.tagIndex:${model.tagIndex}");
                    Navigator.pop(context, resultMap);
                  });
                },
                padding: EdgeInsets.zero,
                susItemBuilder: (BuildContext context, int index) {
                  final CountryRegionModel model = countriesList[index];
                  final String tag = model.getSuspensionTag();
                  return Utils.getSusItem(context, tag);
                },
                indexBarData: const <String>['★', ...kIndexBarData],
              ),
            ),
          ],
        ),
      ),
    );
  }
}