refactor: 1단계 - 질문 연관 답변 삭제 코드 Question 내부로 이동

README.md

@@ -34,9 +34,9 @@ Question
 - [x] 질문 삭제 권한없음 확인
   - [x] 작성자가 본인이 아닌 경우
   - [x] answer에 다른 사람 답변이 있는 경우
-- [ ] 질문 삭제 및 삭제 이력 남기기
-  - [ ] 질문 삭제
-  - [ ] 모든 답변 삭제
+- [x] 질문 삭제 및 삭제 이력 남기기
+  - [x] 질문 삭제
+  - [x] 모든 답변 삭제
 
 Answer
 - [x] 작성자 본인인지 확인

src/main/java/nextstep/qna/domain/Question.java

@@ -101,13 +101,20 @@ public boolean isDeleted() {
         return deleted;
     }
 
-    public List<Answer> getAnswers() {
-        return answers;
+    public List<DeleteHistory> delete() {
+        List<DeleteHistory> deleteHistories = new ArrayList<>();
+        this.setDeleted(true);
+        deleteHistories.add(new DeleteHistory(ContentType.QUESTION, this.id, this.writer, LocalDateTime.now()));
+        deleteHistories.addAll(deleteAnswers());
+        return deleteHistories;
     }
 
-    public DeleteHistory delete() {
-        this.setDeleted(true);
-        return new DeleteHistory(ContentType.QUESTION, this.id, this.writer, LocalDateTime.now());
+    private List<DeleteHistory> deleteAnswers() {
+        List<DeleteHistory> deleteHistories = new ArrayList<>();
+        for (Answer answer : answers) {
+            deleteHistories.add(answer.delete());
+        }
+        return deleteHistories;
     }
 
     @Override

src/main/java/nextstep/qna/service/QnAService.java

@@ -28,13 +28,7 @@ public void deleteQuestion(NsUser loginUser, long questionId) throws CannotDelet
         Question question = questionRepository.findById(questionId).orElseThrow(NotFoundException::new);
         question.checkDeletePermission(loginUser);
 
-        List<Answer> answers = question.getAnswers();
-
-        List<DeleteHistory> deleteHistories = new ArrayList<>();
-        deleteHistories.add(question.delete());
-        for (Answer answer : answers) {
-            deleteHistories.add(answer.delete());
-        }
+        List<DeleteHistory> deleteHistories = question.delete();
         deleteHistoryService.saveAll(deleteHistories);
     }
 }