feat: 댓글 삭제 기능 구현

Author: seok6555

src/main/java/com/back/domain/post/comment/controller/CommentController.java

@@ -12,6 +12,7 @@
 import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -90,4 +91,14 @@ public RsData<CommentResponseDto> updateComment(
   ) {
     return RsData.successOf(commentService.updateComment(postId, commentId, reqBody)); // code=200, message="success"
   }
+
+  @DeleteMapping("/{commentId}")
+  @Operation(summary = "댓글 삭제")
+  public RsData<Void> deleteComment(
+      @PathVariable Long postId,
+      @PathVariable Long commentId
+  ) {
+    commentService.deleteComment(postId, commentId);
+    return RsData.successOf(null); // code=200, message="success"
+  }
 }

src/main/java/com/back/domain/post/comment/dto/request/CommentCreateRequestDto.java

@@ -1,8 +1,10 @@
 package com.back.domain.post.comment.dto.request;
 
+import com.back.domain.post.comment.enums.CommentStatus;
 import jakarta.validation.constraints.NotBlank;
 
 public record CommentCreateRequestDto(
+    CommentStatus status,
     @NotBlank (message = "내용은 필수입니다.")
     String content
 ) {

src/main/java/com/back/domain/post/comment/dto/request/CommentUpdateRequestDto.java

@@ -1,6 +1,9 @@
 package com.back.domain.post.comment.dto.request;
 
+import com.back.domain.post.comment.enums.CommentStatus;
+
 public record CommentUpdateRequestDto(
+    CommentStatus status,
     String content
 ) {
 }

src/main/java/com/back/domain/post/comment/dto/response/CommentResponseDto.java

@@ -1,6 +1,7 @@
 package com.back.domain.post.comment.dto.response;
 
 import com.back.domain.post.comment.entity.Comment;
+import com.back.domain.post.comment.enums.CommentStatus;
 import java.time.LocalDateTime;
 
 public record CommentResponseDto(
@@ -9,6 +10,7 @@ public record CommentResponseDto(
     String userNickName,
     LocalDateTime createdAt,
     LocalDateTime updatedAt,
+    CommentStatus status,
     String content
 ) {
 
@@ -19,6 +21,7 @@ public CommentResponseDto(Comment comment) {
         comment.getUser().getNickname(),
         comment.getCreatedAt(),
         comment.getUpdatedAt(),
+        comment.getStatus(),
         comment.getContent()
     );
   }

src/main/java/com/back/domain/post/comment/entity/Comment.java

@@ -1,10 +1,14 @@
 package com.back.domain.post.comment.entity;
 
+import com.back.domain.post.comment.enums.CommentStatus;
 import com.back.domain.post.post.entity.Post;
+import com.back.domain.post.post.enums.PostStatus;
 import com.back.domain.user.entity.User;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.EntityListeners;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
 import jakarta.persistence.FetchType;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
@@ -53,10 +57,20 @@ public class Comment {
   @LastModifiedDate
   private LocalDateTime updatedAt;
 
+  // 댓글 게시 상태 (기본값: 공개)
+  @Builder.Default
+  @Enumerated(EnumType.STRING)
+  @Column(name = "status", nullable = false)
+  private CommentStatus status = CommentStatus.PUBLIC;
+
   // 댓글 내용
   @Column(name = "content", nullable = false, columnDefinition = "TEXT")
   private String content;
 
+  public void updateStatus(CommentStatus status) {
+    this.status = status;
+  }
+
   public void updateContent(String content) {
     this.content = content;
   }

src/main/java/com/back/domain/post/comment/enums/CommentStatus.java

@@ -0,0 +1,15 @@
+package com.back.domain.post.comment.enums;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public enum CommentStatus {
+  PUBLIC("공개", "모든 사용자가 볼 수 있는 상태"),
+  PRIVATE("비공개", "게시글 작성자와 댓글 작성자만 볼 수 있는 상태"),
+  DELETED("삭제됨", "삭제 처리된 댓글 상태");
+
+  private final String title;
+  private final String description;
+}

src/main/java/com/back/domain/post/comment/service/CommentService.java

@@ -4,6 +4,7 @@
 import com.back.domain.post.comment.dto.request.CommentUpdateRequestDto;
 import com.back.domain.post.comment.dto.response.CommentResponseDto;
 import com.back.domain.post.comment.entity.Comment;
+import com.back.domain.post.comment.enums.CommentStatus;
 import com.back.domain.post.comment.repository.CommentRepository;
 import com.back.domain.post.post.entity.Post;
 import com.back.domain.post.post.repository.PostRepository;
@@ -58,12 +59,7 @@ public List<CommentResponseDto> getComments(Long postId, Long lastId) {
   // 댓글 단건 조회 로직
   @Transactional(readOnly = true)
   public CommentResponseDto getComment(Long postId, Long commentId) {
-    Comment comment = commentRepository.findById(commentId)
-        .orElseThrow(() -> new IllegalArgumentException("댓글이 존재하지 않습니다. id=" + commentId));
-
-    if (!comment.getPost().getId().equals(postId)) {
-      throw new IllegalStateException("댓글이 해당 게시글에 속하지 않습니다.");
-    }
+    Comment comment = findCommentWithValidation(postId, commentId);
 
     return new CommentResponseDto(comment);
   }
@@ -73,12 +69,7 @@ public CommentResponseDto getComment(Long postId, Long commentId) {
   public CommentResponseDto updateComment(Long postId, Long commentId, CommentUpdateRequestDto requestDto) {
     User user = rq.getActor();
 
-    Comment comment = commentRepository.findById(commentId)
-        .orElseThrow(() -> new IllegalArgumentException("댓글이 존재하지 않습니다. id=" + commentId));
-
-    if (!comment.getPost().getId().equals(postId)) {
-      throw new IllegalStateException("댓글이 해당 게시글에 속하지 않습니다.");
-    }
+    Comment comment = findCommentWithValidation(postId, commentId);
 
     if (!comment.getUser().equals(user)) {
       throw new IllegalStateException("본인의 댓글만 수정할 수 있습니다.");
@@ -87,4 +78,33 @@ public CommentResponseDto updateComment(Long postId, Long commentId, CommentUpda
     comment.updateContent(requestDto.content());
     return new CommentResponseDto(comment);
   }
+
+  // 댓글 삭제 로직
+  @Transactional
+  public void deleteComment(Long postId, Long commentId) {
+    User user = rq.getActor();
+
+    Comment comment = findCommentWithValidation(postId, commentId);
+
+    if (!comment.getUser().equals(user)) {
+      throw new IllegalStateException("본인의 댓글만 삭제할 수 있습니다.");
+    }
+
+    comment.updateStatus(CommentStatus.DELETED);
+
+    // soft delete를 사용하기 위해 레포지토리 삭제 작업은 진행하지 않음.
+//    commentRepository.delete(comment);
+  }
+
+  // 댓글과 게시글의 연관관계 검증
+  private Comment findCommentWithValidation(Long postId, Long commentId) {
+    Comment comment = commentRepository.findById(commentId)
+        .orElseThrow(() -> new IllegalArgumentException("댓글이 존재하지 않습니다. id=" + commentId));
+
+    if (!comment.getPost().getId().equals(postId)) {
+      throw new IllegalStateException("댓글이 해당 게시글에 속하지 않습니다.");
+    }
+
+    return comment;
+  }
 }