zhiying_comm/lib/models/user/user_info_model_notifier.dart

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:zhiying_comm/models/user/user_info_model.dart';
import 'package:zhiying_comm/util/global_config.dart';
import 'package:zhiying_comm/util/log/let_log.dart';
import 'package:zhiying_comm/util/shared_prefe_util.dart';

///
/// 用户信息Provider
///
class UserInfoNotifier with ChangeNotifier {
  /// 用户信息
  UserInfoModel _userInfo;

  UserInfoModel get userInfo {
    if (null == _userInfo) {
      getUserInfoModel().then((user) {
        if (user != null) {
          _userInfo = user;
          notifyListeners();
        }
      });
    }
    return _userInfo;
  }

  /// 更新用户数据
  void setUserInfo(UserInfoModel loginUser) async {
    print('${loginUser.toString()}');
    this._userInfo = loginUser;
    // 缓存数据
    await SharedPreferencesUtil.setStringValue(
        GlobalConfig.SHARED_KEY_TOKEN, loginUser.token);
    await SharedPreferencesUtil.setStringValue(
        GlobalConfig.SHARED_KEY_MOBILE, loginUser.mobile);
    await SharedPreferencesUtil.setStringValue(
        GlobalConfig.SHARED_KEY_USER_INFO, jsonEncode(loginUser.toJson()));
    notifyListeners();
  }

  /// 退出登陆
  void unLogin() async {
    this._userInfo = null;
    // 清除缓存数据
    await SharedPreferencesUtil.setStringValue(
        GlobalConfig.SHARED_KEY_TOKEN, '');
    await SharedPreferencesUtil.setStringValue(
        GlobalConfig.SHARED_KEY_MOBILE, '');
    await SharedPreferencesUtil.setStringValue(
        GlobalConfig.SHARED_KEY_USER_INFO, '');
    notifyListeners();
  }

  /// 获取登陆数据
  Future<UserInfoModel> getUserInfoModel() async {
    if (null != _userInfo) {
      return _userInfo;
    }
    try {
      String userInfoJson = await SharedPreferencesUtil.getStringValue(
          GlobalConfig.SHARED_KEY_USER_INFO);
      _userInfo = UserInfoModel.fromJson(jsonDecode(userInfoJson));
    } catch (e) {
      Logger.log(e);
    }
    return _userInfo;
  }
}