fix settings

lib/features/auth/domain/usecases/get_current_user_usecase.dart

@@ -0,0 +1,16 @@
+import 'package:fpdart/fpdart.dart';
+import '../../../../core/errors/failures.dart';
+import '../../../../shared/domain/usecases/usecase.dart';
+import '../entities/user.dart';
+import '../repositories/auth_repository.dart';
+
+class GetCurrentUserUseCase implements UseCase<User?, NoParams> {
+  final AuthRepository repository;
+
+  GetCurrentUserUseCase(this.repository);
+
+  @override
+  Future<Either<Failure, User?>> call(NoParams params) async {
+    return repository.getCurrentUser();
+  }
+}

lib/features/auth/domain/usecases/login_usecase.dart

@@ -0,0 +1,43 @@
+import 'package:fpdart/fpdart.dart';
+import '../../../../core/errors/failures.dart';
+import '../../../../shared/domain/usecases/usecase.dart';
+import '../entities/user.dart';
+import '../repositories/auth_repository.dart';
+
+class LoginParams {
+  final String email;
+  final String password;
+
+  const LoginParams({
+    required this.email,
+    required this.password,
+  });
+}
+
+class LoginUseCase implements UseCase<User, LoginParams> {
+  final AuthRepository repository;
+
+  LoginUseCase(this.repository);
+
+  @override
+  Future<Either<Failure, User>> call(LoginParams params) async {
+    // Validate email format
+    if (!_isValidEmail(params.email)) {
+      return Left(ValidationFailure('Invalid email format'));
+    }
+
+    // Validate password
+    if (params.password.length < 6) {
+      return Left(ValidationFailure('Password must be at least 6 characters'));
+    }
+
+    return repository.login(
+      email: params.email,
+      password: params.password,
+    );
+  }
+
+  bool _isValidEmail(String email) {
+    return RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$').hasMatch(email);
+  }
+}

lib/features/auth/domain/usecases/logout_usecase.dart

@@ -0,0 +1,15 @@
+import 'package:fpdart/fpdart.dart';
+import '../../../../core/errors/failures.dart';
+import '../../../../shared/domain/usecases/usecase.dart';
+import '../repositories/auth_repository.dart';
+
+class LogoutUseCase implements UseCase<void, NoParams> {
+  final AuthRepository repository;
+
+  LogoutUseCase(this.repository);
+
+  @override
+  Future<Either<Failure, void>> call(NoParams params) async {
+    return repository.logout();
+  }
+}