feat: �community-comment 삭제 기능 (#73)

* test(community): CommunityComment 삭제 기능 테스트 작성

* test(community): CommunityComment 삭제 Usecase 추가 및 Service 구현

* test(community): CommunityComment 작성자 확인 메서드 및 권한 예외 메세지 추가

* refactor(community): 코드 리뷰 사항 반영

- getCommunityBoardById -> getCommunityCommentById

Author: ayoung-dev

src/main/java/com/somemore/community/domain/CommunityComment.java

@@ -38,4 +38,8 @@ public CommunityComment(UUID writerId, String content, Long parentCommentId) {
         this.content = content;
         this.parentCommentId = parentCommentId;
     }
+
+    public boolean isWriter(UUID writerId) {
+        return this.writerId.equals(writerId);
+    }
 }

src/main/java/com/somemore/community/service/comment/DeleteCommunityCommentService.java

@@ -0,0 +1,46 @@
+package com.somemore.community.service.comment;
+
+import com.somemore.community.domain.CommunityComment;
+import com.somemore.community.repository.comment.CommunityCommentRepository;
+import com.somemore.community.usecase.comment.DeleteCommunityCommentUseCase;
+import com.somemore.global.exception.BadRequestException;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.UUID;
+
+import static com.somemore.global.exception.ExceptionMessage.*;
+
+@RequiredArgsConstructor
+@Transactional
+@Service
+public class DeleteCommunityCommentService implements DeleteCommunityCommentUseCase {
+
+    private final CommunityCommentRepository communityCommentRepository;
+
+    @Override
+    public void deleteCommunityComment(UUID writerId, Long id) {
+
+        CommunityComment communityComment = getCommunityCommentById(id);
+
+        validateWriter(communityComment, writerId);
+
+        communityComment.markAsDeleted();
+
+        communityCommentRepository.save(communityComment);
+    }
+
+    private CommunityComment getCommunityCommentById(Long id) {
+        return communityCommentRepository.findById(id)
+                .orElseThrow(() -> new BadRequestException(NOT_EXISTS_COMMUNITY_COMMENT.getMessage()));
+    }
+
+    private void validateWriter(CommunityComment communityComment, UUID writerId) {
+        if (communityComment.isWriter(writerId)) {
+            return;
+        }
+
+        throw new BadRequestException(UNAUTHORIZED_COMMUNITY_COMMENT.getMessage());
+    }
+}

src/main/java/com/somemore/community/usecase/comment/DeleteCommunityCommentUseCase.java

@@ -0,0 +1,7 @@
+package com.somemore.community.usecase.comment;
+
+import java.util.UUID;
+
+public interface DeleteCommunityCommentUseCase {
+    void deleteCommunityComment(UUID writerId, Long id);
+}

src/main/java/com/somemore/global/exception/ExceptionMessage.java

@@ -12,6 +12,7 @@ public enum ExceptionMessage {
     NOT_EXISTS_COMMUNITY_BOARD("존재하지 않는 게시글 입니다."),
     UNAUTHORIZED_COMMUNITY_BOARD("해당 게시글에 권한이 없습니다."),
     NOT_EXISTS_COMMUNITY_COMMENT("존재하지 않는 댓글 입니다."),
+    UNAUTHORIZED_COMMUNITY_COMMENT("해당 댓글에 권한이 없습니다."),
     NOT_EXISTS_LOCATION("존재하지 않는 위치 ID 입니다."),
     NOT_EXISTS_RECRUIT_BOARD("존재하지 않는 봉사 모집글 ID 입니다."),
     UNAUTHORIZED_RECRUIT_BOARD("해당 봉사 모집글에 권한이 없습니다."),

src/test/java/com/somemore/community/service/comment/DeleteCommunityCommentServiceTest.java

@@ -0,0 +1,88 @@
+package com.somemore.community.service.comment;
+
+import com.somemore.IntegrationTestSupport;
+import com.somemore.community.dto.request.CommunityCommentCreateRequestDto;
+import com.somemore.community.repository.comment.CommunityCommentRepository;
+import com.somemore.community.usecase.comment.CreateCommunityCommentUseCase;
+import com.somemore.global.exception.BadRequestException;
+import com.somemore.global.exception.ExceptionMessage;
+import org.assertj.core.api.ThrowableAssert;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.UUID;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+
+class DeleteCommunityCommentServiceTest extends IntegrationTestSupport {
+
+    @Autowired
+    private DeleteCommunityCommentService deleteCommunityCommentService;
+    @Autowired
+    private CreateCommunityCommentUseCase createCommunityCommentUseCase;
+    @Autowired
+    private CommunityCommentRepository communityCommentRepository;
+
+    private UUID writerId;
+    private Long commentId;
+
+    @BeforeEach
+    void setUp() {
+        CommunityCommentCreateRequestDto dto = CommunityCommentCreateRequestDto.builder()
+                .content("커뮤니티 댓글 테스트 내용")
+                .parentCommentId(null)
+                .build();
+
+        writerId = UUID.randomUUID();
+
+        commentId = createCommunityCommentUseCase.createCommunityComment(dto, writerId);
+    }
+
+    @AfterEach
+    void tearDown() {
+        communityCommentRepository.deleteAllInBatch();
+    }
+
+    @DisplayName("댓글 id로 댓글을 삭제한다.")
+    @Test
+    void deleteCommunityCommentWithId() {
+        //given
+        //when
+        deleteCommunityCommentService.deleteCommunityComment(writerId, commentId);
+
+        //then
+        assertThat(communityCommentRepository.existsById(commentId)).isFalse();
+    }
+
+    @DisplayName("삭제된 댓글의 id로 댓글을 삭제할 때 예외를 던진다.")
+    @Test
+    void deleteCommunityCommentWithDeletedId() {
+        //given
+        deleteCommunityCommentService.deleteCommunityComment(writerId, commentId);
+
+        //when
+        ThrowableAssert.ThrowingCallable callable = () -> deleteCommunityCommentService.deleteCommunityComment(writerId, commentId);
+
+        //then
+        assertThatExceptionOfType(BadRequestException.class)
+                .isThrownBy(callable)
+                .withMessage(ExceptionMessage.NOT_EXISTS_COMMUNITY_COMMENT.getMessage());
+    }
+
+    @DisplayName("작성자가 아닌 id로 댓글을 삭제하고자 할 때 예외를 던진다.")
+    @Test
+    void deleteCommunityCommentWithNotWriterId() {
+        //given
+        //when
+        ThrowableAssert.ThrowingCallable callable = () -> deleteCommunityCommentService.deleteCommunityComment(UUID.randomUUID(), commentId);
+
+        //then
+        assertThatExceptionOfType(BadRequestException.class)
+                .isThrownBy(callable)
+                .withMessage(ExceptionMessage.UNAUTHORIZED_COMMUNITY_COMMENT.getMessage());
+    }
+}