refactoring

lib/data/services/preferences_helper.dart

@@ -0,0 +1,50 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+class PreferencesHelper {
+  final Future<SharedPreferences> _prefs = SharedPreferences.getInstance();
+
+  Future<void> setString(String key, String value) async {
+    final prefs = await _prefs;
+    await prefs.setString(key, value);
+  }
+
+  Future<String?> getString(String key) async {
+    final prefs = await _prefs;
+    return prefs.getString(key);
+  }
+
+  Future<void> remove(String key) async {
+    final prefs = await _prefs;
+    await prefs.remove(key);
+  }
+
+  Future<void> saveUserId(String userId) async {
+    await setString('user_id', userId);
+  }
+
+  Future<String?> getUserId() async {
+    return await getString('user_id');
+  }
+
+  Future<void> saveUserName(String userName) async {
+    await setString('user_name', userName);
+  }
+
+  Future<String?> getUserName() async {
+    return await getString('user_name');
+  }
+
+  Future<void> saveUserLastName(String userLastName) async {
+    await setString('user_last_name', userLastName);
+  }
+
+  Future<String?> getUserLastName() async {
+    return await getString('user_last_name');
+  }
+
+  Future<void> clearUserInfo() async {
+    await remove('user_id');
+    await remove('user_name');
+    await remove('user_last_name');
+  }
+}