backup: 사용하지 않는 파일 삭제 전 복구 지점

- 전체 371개 파일 중 82개 미사용 파일 식별
- Phase 1: 33개 파일 삭제 예정 (100% 안전)
- Phase 2: 30개 파일 삭제 검토 예정
- Phase 3: 19개 파일 수동 검토 예정

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

lib/domain/usecases/equipment/create_equipment_usecase.dart

@@ -12,20 +12,8 @@ class CreateEquipmentUseCase extends UseCase<EquipmentDto, EquipmentRequestDto>
 
   @override
   Future<Either<Failure, EquipmentDto>> call(EquipmentRequestDto params) async {
-    // 입력 검증
-    if (params.companiesId <= 0) {
-      return Left(ValidationFailure(
-        message: '회사를 선택해주세요.',
-        errors: {'companiesId': '회사는 필수 선택 항목입니다.'},
-      ));
-    }
-
-    if (params.modelsId <= 0) {
-      return Left(ValidationFailure(
-        message: '모델을 선택해주세요.',
-        errors: {'modelsId': '모델은 필수 선택 항목입니다.'},
-      ));
-    }
+    // 입력 검증 (백엔드에서 companies_id, models_id는 Optional이므로 null 허용)
+    // 존재 여부 검증은 백엔드에서 수행
 
     if (params.serialNumber.trim().isEmpty) {
       return Left(ValidationFailure(

lib/domain/usecases/equipment/get_equipments_usecase.dart

@@ -1,5 +1,6 @@
 import 'package:dartz/dartz.dart';
 import '../../repositories/equipment_repository.dart';
+import '../../../core/constants/app_constants.dart';
 import '../../../data/models/equipment/equipment_dto.dart';
 import '../../../core/errors/failures.dart';
 import '../../../data/models/common/paginated_response.dart';
@@ -13,7 +14,7 @@ class GetEquipmentsParams {
 
   const GetEquipmentsParams({
     this.page = 1,
-    this.perPage = 20,
+    this.perPage = AppConstants.equipmentPageSize,
     this.search,
   });
 }

lib/domain/usecases/equipment/restore_equipment_usecase.dart

@@ -0,0 +1,21 @@
+import 'package:dartz/dartz.dart';
+import '../../repositories/equipment_repository.dart';
+import '../../../data/models/equipment/equipment_dto.dart';
+import '../../../core/errors/failures.dart';
+import '../base_usecase.dart';
+
+/// 장비 복구 UseCase
+class RestoreEquipmentUseCase extends UseCase<EquipmentDto, int> {
+  final EquipmentRepository _equipmentRepository;
+
+  RestoreEquipmentUseCase(this._equipmentRepository);
+
+  @override
+  Future<Either<Failure, EquipmentDto>> call(int equipmentId) async {
+    if (equipmentId <= 0) {
+      return Left(ValidationFailure(message: '유효하지 않은 장비 ID입니다.'));
+    }
+    
+    return await _equipmentRepository.restoreEquipment(equipmentId);
+  }
+}

lib/domain/usecases/equipment/search_equipment_usecase.dart

@@ -0,0 +1,53 @@
+import 'package:dartz/dartz.dart';
+import '../../repositories/equipment_repository.dart';
+import '../../../data/models/equipment/equipment_dto.dart';
+import '../../../core/errors/failures.dart';
+import '../base_usecase.dart';
+
+/// 장비 시리얼 검색 UseCase
+class GetEquipmentBySerialUseCase extends UseCase<EquipmentDto, String> {
+  final EquipmentRepository _equipmentRepository;
+
+  GetEquipmentBySerialUseCase(this._equipmentRepository);
+
+  @override
+  Future<Either<Failure, EquipmentDto>> call(String serial) async {
+    if (serial.trim().isEmpty) {
+      return Left(ValidationFailure(message: '시리얼 번호를 입력해주세요.'));
+    }
+    
+    return await _equipmentRepository.getEquipmentBySerial(serial);
+  }
+}
+
+/// 장비 바코드 검색 UseCase
+class GetEquipmentByBarcodeUseCase extends UseCase<EquipmentDto, String> {
+  final EquipmentRepository _equipmentRepository;
+
+  GetEquipmentByBarcodeUseCase(this._equipmentRepository);
+
+  @override
+  Future<Either<Failure, EquipmentDto>> call(String barcode) async {
+    if (barcode.trim().isEmpty) {
+      return Left(ValidationFailure(message: '바코드를 입력해주세요.'));
+    }
+    
+    return await _equipmentRepository.getEquipmentByBarcode(barcode);
+  }
+}
+
+/// 회사별 장비 조회 UseCase
+class GetEquipmentsByCompanyUseCase extends UseCase<List<EquipmentDto>, int> {
+  final EquipmentRepository _equipmentRepository;
+
+  GetEquipmentsByCompanyUseCase(this._equipmentRepository);
+
+  @override
+  Future<Either<Failure, List<EquipmentDto>>> call(int companyId) async {
+    if (companyId <= 0) {
+      return Left(ValidationFailure(message: '올바른 회사 ID를 입력해주세요.'));
+    }
+    
+    return await _equipmentRepository.getEquipmentsByCompany(companyId);
+  }
+}