add dropdown

lib/features/users/data/repositories/users_repository_impl.dart

@@ -0,0 +1,67 @@
+import 'package:dartz/dartz.dart';
+
+import '../../../../core/errors/exceptions.dart';
+import '../../../../core/errors/failures.dart';
+import '../../domain/entities/user_entity.dart';
+import '../../domain/repositories/users_repository.dart';
+import '../datasources/users_local_datasource.dart';
+import '../datasources/users_remote_datasource.dart';
+
+/// Implementation of UsersRepository
+class UsersRepositoryImpl implements UsersRepository {
+  final UsersRemoteDataSource remoteDataSource;
+  final UsersLocalDataSource localDataSource;
+
+  UsersRepositoryImpl({
+    required this.remoteDataSource,
+    required this.localDataSource,
+  });
+
+  @override
+  Future<Either<Failure, List<UserEntity>>> getUsers() async {
+    try {
+      // Try to get users from local storage first
+      final localUsers = await localDataSource.getUsers();
+
+      if (localUsers.isNotEmpty) {
+        // Return local users if available
+        return Right(localUsers.map((model) => model.toEntity()).toList());
+      }
+
+      // If no local users, fetch from API
+      return await syncUsers();
+    } catch (e) {
+      return Left(CacheFailure(e.toString()));
+    }
+  }
+
+  @override
+  Future<Either<Failure, List<UserEntity>>> syncUsers() async {
+    try {
+      // Fetch users from API
+      final users = await remoteDataSource.getUsers();
+
+      // Save to local storage
+      await localDataSource.saveUsers(users);
+
+      // Return as entities
+      return Right(users.map((model) => model.toEntity()).toList());
+    } on ServerException catch (e) {
+      return Left(ServerFailure(e.message));
+    } on NetworkException catch (e) {
+      return Left(NetworkFailure(e.message));
+    } catch (e) {
+      return Left(ServerFailure(e.toString()));
+    }
+  }
+
+  @override
+  Future<Either<Failure, void>> clearUsers() async {
+    try {
+      await localDataSource.clearUsers();
+      return const Right(null);
+    } catch (e) {
+      return Left(CacheFailure(e.toString()));
+    }
+  }
+}