liangchengyou / wow_english

  import 'dart:convert';
  

  import 'package:flutter/foundation.dart';

  import 'package:flutter/material.dart';

  import 'package:wow_english/common/core/sp_const.dart';

  import 'package:wow_english/models/user_entity.dart';
  import 'package:wow_english/route/route.dart';
  import 'package:wow_english/utils/sp_util.dart';
  
  class UserUtil {

    static UserEntity? _userEntity;
  
    static String get token => _userEntity?.token ?? '';

    static void saveUser(UserEntity? user) {
      if (user == null) {
        _clearUserData();
        return;
      }

      _userEntity = user;
      _saveUserJson(user.toString());

    }
  
    static UserEntity? getUser() {

      if (_userEntity == null) {
        String? userJson = _getUserJson();
        if (userJson != null && userJson.isNotEmpty) {
          try {
            var userEntity = UserEntity.fromJson(json.decode(userJson));
            // todo 并且在有效期，计算一下, "expireTime": 2592000 倒计时需要手动转换，后面再优化
            _userEntity = userEntity;
          } catch (e) {
            if (kDebugMode) {
              print(e);
            }
            _clearUserData();
          }

        }
      }

      return _userEntity;

    }
  

    static void _saveUserJson(String userJson) {

      SpUtil.getInstance().setData(SpConst.prefsKeyUserInfo, userJson);
    }
  

    static String? _getUserJson() {

      return SpUtil.getInstance().get<String>(SpConst.prefsKeyUserInfo);
    }
  

    static void _clearUserData() {
      _userEntity = null;

      SpUtil.getInstance().remove(SpConst.prefsKeyUserInfo);
    }
  

    static void logout() {

      _clearUserData();

      Navigator.of(AppRouter.context).pushNamedAndRemoveUntil(AppRouteName.login, (route) => false);

    }
  }