feat: login api

lib/infrastructure/auth/datasources/local_data_provider.dart

@@ -0,0 +1,54 @@
+import 'dart:convert';
+
+import 'package:injectable/injectable.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../../common/constant/local_storage_key.dart';
+import '../../../domain/auth/auth.dart';
+import '../auth_dtos.dart';
+
+@injectable
+class AuthLocalDataProvider {
+  final SharedPreferences _sharedPreferences;
+
+  AuthLocalDataProvider(this._sharedPreferences);
+
+  Future<void> saveToken(String token) async {
+    await _sharedPreferences.setString(LocalStorageKey.token, token);
+  }
+
+  Future<String?> getToken() async {
+    return _sharedPreferences.getString(LocalStorageKey.token);
+  }
+
+  Future<void> deleteToken() async {
+    await _sharedPreferences.remove(LocalStorageKey.token);
+  }
+
+  Future<bool> hasToken() async {
+    return _sharedPreferences.containsKey(LocalStorageKey.token);
+  }
+
+  Future<void> saveCurrentUser(UserDto user) async {
+    final userJsonString = jsonEncode(user.toJson());
+    await _sharedPreferences.setString(LocalStorageKey.user, userJsonString);
+  }
+
+  Future<User> currentUser() async {
+    final userString = _sharedPreferences.getString(LocalStorageKey.user);
+    if (userString == null) return User.empty();
+
+    final Map<String, dynamic> userMap = jsonDecode(userString);
+    final userDto = UserDto.fromJson(userMap);
+    return userDto.toDomain();
+  }
+
+  Future<void> deleteCurrentUser() async {
+    await _sharedPreferences.remove(LocalStorageKey.user);
+  }
+
+  Future<void> deleteAllAuth() async {
+    await _sharedPreferences.remove(LocalStorageKey.token);
+    await _sharedPreferences.remove(LocalStorageKey.user);
+  }
+}