CLAP-113 Refactor: 유효성 검증 메서드 분리

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- 관련: #76

Author: joowojr

src/main/java/clap/server/application/Task/UpdateTaskService.java

@@ -58,16 +58,18 @@ public UpdateTaskResponse updateTask(Long requesterId, Long taskId, UpdateTaskRe
     }
 
     private void updateAttachments(List<Long> attachmentIdsToDelete, List<MultipartFile> files, Task task) {
-        List<Attachment> attachmentsOfTask = loadAttachmentPort.findAllByTaskIdAndAttachmentIdIn(task.getTaskId(), attachmentIdsToDelete);
-
-        if(attachmentsOfTask.size() != attachmentIdsToDelete.size()) {
-            throw new ApplicationException(TaskErrorCode.TASK_ATTACHMENT_NOT_FOUND);
-        }
-
+        validateAttachments(attachmentIdsToDelete, task);
         commandAttachmentPort.deleteByIds(attachmentIdsToDelete);
 
         List<String> fileUrls = s3UploadService.uploadFiles(FilePath.TASK_IMAGE, files);
         List<Attachment> attachments = AttachmentMapper.toTaskAttachments(task, files, fileUrls);
         commandAttachmentPort.saveAll(attachments);
     }
+
+    private void validateAttachments(List<Long> attachmentIdsToDelete, Task task) {
+        List<Attachment> attachmentsOfTask = loadAttachmentPort.findAllByTaskIdAndAttachmentIdIn(task.getTaskId(), attachmentIdsToDelete);
+        if(attachmentsOfTask.size() != attachmentIdsToDelete.size()) {
+            throw new ApplicationException(TaskErrorCode.TASK_ATTACHMENT_NOT_FOUND);
+        }
+    }
 }