aku_new_community_manager/lib/utils/network/net_util.dart

// Dart imports:
import 'dart:io';

// Package imports:
import 'package:bot_toast/bot_toast.dart';
import 'package:dio/dio.dart';
import 'package:get/get.dart' hide Response, FormData, MultipartFile;
import 'package:power_logger/power_logger.dart';
import 'package:provider/provider.dart';

// Project imports:
import 'package:aku_community_manager/const/api.dart';
import 'package:aku_community_manager/provider/user_provider.dart';
import 'package:aku_community_manager/ui/login/login_page.dart';
import 'package:aku_community_manager/utils/network/base_file_model.dart';
import 'package:aku_community_manager/utils/network/base_list_model.dart';
import 'package:aku_community_manager/utils/network/base_model.dart';

class NetUtil {
  Dio _dio;
  static final NetUtil _netUtil = NetUtil._internal();

  factory NetUtil() => _netUtil;

  Dio get dio => _dio;

  NetUtil._internal() {
    BaseOptions options = BaseOptions(
      baseUrl: API.baseURL,
      connectTimeout: API.networkTimeOut,
      receiveTimeout: API.networkTimeOut,
      sendTimeout: API.networkTimeOut,
      headers: {},
    );
    if (_dio == null) _dio = Dio(options);
    dio.interceptors.add(InterceptorsWrapper(
      onRequest:
          (RequestOptions options, RequestInterceptorHandler handler) async =>
              handler.next(options),
      onResponse:
          (Response response, ResponseInterceptorHandler handler) async {
        LoggerData.addData(response);
        return handler.next(response);
      },
      onError: (DioError error, ErrorInterceptorHandler handler) async {
        _parseErr(error);
        return handler.next(error);
      },
    ));
  }

  ///call auth after login
  auth(int token) {
    _dio.options.headers.putIfAbsent('butlerApp-admin-token', () => token);
  }

  logout() {
    _dio.options.headers.remove('butlerApp-admin-token');
  }

  /// ## alias of Dio().get
  ///
  /// GET method
  Future<BaseModel> get(
    String path, {
    Map<String, dynamic> params,
    bool showMessage = false,
  }) async {
    try {
      Response res = await _dio.get(path, queryParameters: params);
      BaseModel baseModel = BaseModel.fromJson(res.data);
      _parseRequestError(baseModel, showMessage: showMessage);
      return baseModel;
    } on DioError catch (e) {
      _parseErr(e);
    }
    return BaseModel.err();
  }

  /// ## alias of Dio().post
  ///
  /// POST method
  ///
  /// only work with JSON.
  Future<BaseModel> post(
    String path, {
    Map<String, dynamic> params,
    bool showMessage = false,
  }) async {
    try {
      Response res = await _dio.post(path, data: params);

      BaseModel baseModel = BaseModel.fromJson(res.data);
      _parseRequestError(baseModel, showMessage: showMessage);

      return baseModel;
    } on DioError catch (e) {
      _parseErr(e);
    }
    return BaseModel.err();
  }

  Future<BaseListModel> getList(
    String path, {
    Map<String, dynamic> params,
  }) async {
    try {
      Response res = await _dio.get(path, queryParameters: params);
      if ((res.data as Map<String, dynamic>).containsKey('status') &&
          (res.data as Map<String, dynamic>).containsKey('data') &&
          (res.data as Map<String, dynamic>).containsKey('message')) {
        BaseModel baseModel = BaseModel.fromJson(res.data);
        _parseRequestError(baseModel);
      } else {
        BaseListModel baseListModel = BaseListModel.fromJson(res.data);
        return baseListModel;
      }
    } on DioError catch (e) {
      _parseErr(e);
    }
    return BaseListModel.err();
  }

  Future<BaseFileModel> upload(String path, File file) async {
    try {
      Response res = await _dio.post(path,
          data: FormData.fromMap({
            'file': await MultipartFile.fromFile(file.path),
          }));
      BaseFileModel baseListModel = BaseFileModel.fromJson(res.data);
      return baseListModel;
    } on DioError catch (e) {
      print(e);
    }
    return BaseFileModel.err();
  }

  Future<List<String>> uploadFiles(List<File> files, String api) async {
    List<String> urls = [];
    if (files.isEmpty) {
      return [];
    } else {
      for (var item in files) {
        BaseFileModel model = await NetUtil().upload(api, item);
        urls.add(model.url);
      }
    }

    return urls;
  }

  _parseErr(DioError err) {
    final userProvider = Provider.of<UserProvider>(Get.context, listen: false);
    LoggerData.addData(err);
    _makeToast(String message) {
      BotToast.showText(text: '$message\_${err?.response?.statusCode ?? ''}');
    }

    switch (err.type) {
      case DioErrorType.connectTimeout:
      case DioErrorType.sendTimeout:
      case DioErrorType.receiveTimeout:
        _makeToast('连接超时');
        break;
      case DioErrorType.response:
        _makeToast('服务器出错');
        break;
      case DioErrorType.cancel:
        break;
      case DioErrorType.other:
        _makeToast('未知错误');
        break;
    }
  }

  _parseRequestError(BaseModel model, {bool showMessage = false}) {
    final userProvider = Provider.of<UserProvider>(Get.context, listen: false);
    if (!model.status && model.message == '登录失效，请登录' && userProvider.isLogin) {
      userProvider.logout();
      Get.offAll(LoginPage());
    }
    if (!model.status || showMessage) {
      BotToast.showText(text: model.message);
    }
  }
}