68 lines
2.1 KiB
Dart
68 lines
2.1 KiB
Dart
import 'package:flutter/foundation.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class AuthProvider with ChangeNotifier {
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String? _token;
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String? _userId;
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bool _isLoggedIn = false;
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static const String _tokenKey = 'auth_token';
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static const String _userIdKey = 'user_id';
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String? get token => _token;
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String? get userId => _userId;
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bool get isLoggedIn => _isLoggedIn;
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AuthProvider() {
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// 初始化时设置登录状态，避免覆盖外部设置的值
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_isLoggedIn = _token != null;
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}
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// 改为公开方法
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Future<void> loadTokenFromPrefs() async {
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// 如果已经有token，不要再从SharedPreferences加载
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if (_token != null) return;
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final prefs = await SharedPreferences.getInstance();
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_token = prefs.getString(_tokenKey) ?? prefs.getString('token');
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_userId = prefs.getString(_userIdKey) ?? prefs.getString('userId');
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_isLoggedIn = _token != null;
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notifyListeners();
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}
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Future<void> setToken(String? token, {String? userId}) async {
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_token = token;
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_userId = userId;
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_isLoggedIn = token != null;
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notifyListeners();
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await _saveTokenToPrefs(token, userId: userId);
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}
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Future<void> clearToken() async {
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_token = null;
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_userId = null;
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_isLoggedIn = false;
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notifyListeners();
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await _saveTokenToPrefs(null);
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}
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Future<void> _saveTokenToPrefs(String? token, {String? userId}) async {
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final prefs = await SharedPreferences.getInstance();
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if (token != null) {
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await prefs.setString(_tokenKey, token);
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await prefs.setString('token', token); // 兼容旧键名
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if (userId != null) {
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await prefs.setString(_userIdKey, userId);
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await prefs.setString('userId', userId); // 兼容旧键名
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}
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// 同时设置登录状态标志
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await prefs.setBool('isLoggedIn', true);
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} else {
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await prefs.remove(_tokenKey);
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await prefs.remove(_userIdKey);
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await prefs.remove('token');
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await prefs.remove('userId');
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// 清除登录状态标志
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await prefs.setBool('isLoggedIn', false);
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}
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}
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} |