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lib/domain/usecases/create_vacation_usecase.dart

@@ -0,0 +1,15 @@
+import 'package:dartz/dartz.dart';
+import '../../core/error/failures.dart';
+import '../models/vacation_request.dart';
+import '../models/vacation_response_model.dart';
+import '../repositories/vacation_repository.dart';
+
+class CreateVacationUseCase {
+  final VacationRepository repository;
+
+  CreateVacationUseCase({required this.repository});
+
+  Future<Either<Failure, VacationResponseModel>> call(VacationRequest request) {
+    return repository.createVacation(request);
+  }
+}

lib/domain/usecases/get_vacation_types_usecase.dart

@@ -0,0 +1,14 @@
+import 'package:dartz/dartz.dart';
+import '../../core/error/failures.dart';
+import '../models/vacation_type_model.dart';
+import '../repositories/vacation_repository.dart';
+
+class GetVacationTypesUseCase {
+  final VacationRepository repository;
+
+  GetVacationTypesUseCase({required this.repository});
+
+  Future<Either<Failure, VacationTypesResponseModel>> call() {
+    return repository.getVacationTypes();
+  }
+}