69 lines
2.5 KiB
Dart
69 lines
2.5 KiB
Dart
import 'package:shared_preferences/shared_preferences.dart';
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class AuthManager {
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// --- 單例模式設定 ---
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static final AuthManager _instance = AuthManager._internal();
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factory AuthManager() => _instance;
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AuthManager._internal();
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// 記憶體中的快取，讓您可以直接同步存取
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String? currentUserId;
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String? currentToken;
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String? currentCompany; // 記憶體快取
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// 定義鍵值常數，避免硬編碼字串出錯
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static const String _tokenKey = 'auth_token';
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static const String _userIdKey = 'user_id'; // [新增] 用於儲存工號的鍵值
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static const String _companyKey = 'user_company'; // [新增] 公司別 Key
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/// 初始化：App 啟動時呼叫一次，把硬碟資料讀進記憶體
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Future<void> initialize() async {
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final prefs = await SharedPreferences.getInstance();
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currentUserId = prefs.getString(_userIdKey);
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currentToken = prefs.getString(_tokenKey);
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currentCompany = prefs.getString(_companyKey); // [新增] 初始化讀取
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}
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/// 儲存登入資訊：包含 Token 與工號
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/// 當登入成功時，同時呼叫此方法
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static Future<void> saveLoginInfo(String token, String userId, String company) async {
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final prefs = await SharedPreferences.getInstance();
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await prefs.setString(_tokenKey, token);
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await prefs.setString(_userIdKey, userId);
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await prefs.setString(_companyKey, company); // [新增] 儲存公司別
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// 同步更新記憶體快取
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AuthManager().currentUserId = userId;
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AuthManager().currentToken = token;
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AuthManager().currentCompany = company; // [新增] 同步快取
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}
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/// 讀取儲存的工號 (userid)
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/// 如果沒找到則回傳 null，可用於判斷是否需重新登入
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static Future<String?> getUserId() async {
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final prefs = await SharedPreferences.getInstance();
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return prefs.getString(_userIdKey);
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}
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/// 讀取儲存的 Token
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static Future<String?> getToken() async {
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final prefs = await SharedPreferences.getInstance();
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return prefs.getString(_tokenKey);
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}
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/// 移除所有登入資訊 (用於登出)
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/// 確保 Token 與工號同步清除，保障資安
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static Future<void> logout() async {
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final prefs = await SharedPreferences.getInstance();
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await prefs.remove(_tokenKey);
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await prefs.remove(_userIdKey);
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print('User logged out, auth info cleared.');
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}
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/// 檢查是否已登入 (Token 與 UserID 皆存在)
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static Future<bool> isLoggedIn() async {
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final token = await getToken();
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final userId = await getUserId();
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return token != null && userId != null;
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}
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} |