91 lines
2.6 KiB
Dart
91 lines
2.6 KiB
Dart
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import 'package:shared_preferences/shared_preferences.dart';
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import '../../../core/constants/app_constants.dart';
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/// Token 管理服务
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/// 负责 Token 的存储、读取、刷新和清除
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class TokenService {
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static TokenService? _instance;
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SharedPreferences? _prefs;
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TokenService();
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factory TokenService.getInstance() {
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_instance ??= TokenService();
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return _instance!;
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}
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Future<SharedPreferences> get _preferences async {
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_prefs ??= await SharedPreferences.getInstance();
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return _prefs!;
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}
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/// 获取 Access Token
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Future<String?> getToken() async {
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final prefs = await _preferences;
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return prefs.getString(AppConstants.tokenKey);
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}
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/// 获取 Refresh Token
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Future<String?> getRefreshToken() async {
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final prefs = await _preferences;
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return prefs.getString(AppConstants.refreshTokenKey);
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}
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/// 保存 Token
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Future<void> saveTokens({
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required String token,
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String? refreshToken,
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int? expiresIn,
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}) async {
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final prefs = await _preferences;
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await prefs.setString(AppConstants.tokenKey, token);
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if (refreshToken != null) {
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await prefs.setString(AppConstants.refreshTokenKey, refreshToken);
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}
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if (expiresIn != null) {
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final expiry = DateTime.now().millisecondsSinceEpoch + expiresIn * 1000;
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await prefs.setInt(AppConstants.tokenExpiryKey, expiry);
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}
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}
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/// 刷新 Token
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Future<bool> refreshToken() async {
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// TODO: 实现实际的 Token 刷新逻辑
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// 使用 refreshToken 调用后端接口获取新的 accessToken
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final refreshTok = await getRefreshToken();
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if (refreshTok == null) return false;
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try {
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// 模拟刷新
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// final response = await DioClient().post('/auth/refresh', data: {'refresh_token': refreshTok});
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// await saveTokens(token: response.data['data']['token'], refreshToken: response.data['data']['refresh_token']);
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return true;
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} catch (e) {
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return false;
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}
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}
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/// 检查 Token 是否过期
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Future<bool> isTokenExpired() async {
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final prefs = await _preferences;
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final expiry = prefs.getInt(AppConstants.tokenExpiryKey);
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if (expiry == null) return true;
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return DateTime.now().millisecondsSinceEpoch > expiry;
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}
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/// 清除所有 Token
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Future<void> clearTokens() async {
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final prefs = await _preferences;
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await prefs.remove(AppConstants.tokenKey);
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await prefs.remove(AppConstants.refreshTokenKey);
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await prefs.remove(AppConstants.tokenExpiryKey);
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}
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/// 是否已登录
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Future<bool> isLoggedIn() async {
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final token = await getToken();
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if (token == null) return false;
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return !(await isTokenExpired());
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}
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}
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