Feat: 내 댓글 목록 조회 API 구현

Author: joyewon0705

src/main/java/com/back/domain/board/comment/dto/MyCommentResponse.java

@@ -0,0 +1,55 @@
+package com.back.domain.board.comment.dto;
+
+import com.back.domain.board.comment.entity.Comment;
+
+import java.time.LocalDateTime;
+
+/**
+ * 내 댓글 목록 응답 DTO
+ *
+ * @param commentId     댓글 ID
+ * @param postId        게시글 ID
+ * @param postTitle     게시글 제목
+ * @param parentId      부모 댓글 ID
+ * @param parentContent 부모 댓글 내용 (50자)
+ * @param content       댓글 내용
+ * @param likeCount     좋아요 수
+ * @param createdAt     댓글 생성 일시
+ * @param updatedAt     댓글 수정 일시
+ */
+public record MyCommentResponse(
+        Long commentId,
+        Long postId,
+        String postTitle,
+        Long parentId,
+        String parentContent,
+        String content,
+        long likeCount,
+        LocalDateTime createdAt,
+        LocalDateTime updatedAt
+) {
+    public static MyCommentResponse from(Comment comment) {
+        return new MyCommentResponse(
+                comment.getId(),
+                comment.getPost().getId(),
+                comment.getPost().getTitle(),
+                comment.getParent() != null
+                        ? comment.getParent().getId()
+                        : null,
+                comment.getParent() != null
+                        ? truncate(comment.getParent().getContent())
+                        : null,
+                comment.getContent(),
+                comment.getLikeCount(),
+                comment.getCreatedAt(),
+                comment.getUpdatedAt()
+        );
+    }
+
+    private static String truncate(String content) {
+        int length = 50;
+        return (content == null || content.length() <= length)
+                ? content
+                : content.substring(0, length) + "...";
+    }
+}

src/main/java/com/back/domain/board/comment/repository/CommentRepository.java

@@ -2,9 +2,12 @@
 
 import com.back.domain.board.comment.entity.Comment;
 import com.back.domain.board.comment.repository.custom.CommentRepositoryCustom;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 @Repository
 public interface CommentRepository extends JpaRepository<Comment, Long>, CommentRepositoryCustom {
+    Page<Comment> findAllByUserId(Long userId, Pageable pageable);
 }

src/main/java/com/back/domain/user/controller/UserController.java

@@ -1,5 +1,6 @@
 package com.back.domain.user.controller;
 
+import com.back.domain.board.comment.dto.MyCommentResponse;
 import com.back.domain.board.common.dto.PageResponse;
 import com.back.domain.board.post.dto.PostListResponse;
 import com.back.domain.user.dto.ChangePasswordRequest;
@@ -88,4 +89,18 @@ public ResponseEntity<RsData<PageResponse<PostListResponse>>> getMyPosts(
                         response
                 ));
     }
+
+    // 내 댓글 목록 조회
+    @GetMapping("/me/comments")
+    public ResponseEntity<RsData<PageResponse<MyCommentResponse>>> getMyComments(
+            @AuthenticationPrincipal CustomUserDetails user,
+            @PageableDefault(sort = "createdAt", direction = Sort.Direction.DESC) Pageable pageable
+    ) {
+        PageResponse<MyCommentResponse> response = userService.getMyComments(user.getUserId(), pageable);
+        return ResponseEntity
+                .ok(RsData.success(
+                        "내 댓글 목록이 조회되었습니다.",
+                        response
+                ));
+    }
 }

src/main/java/com/back/domain/user/service/UserService.java

@@ -1,5 +1,7 @@
 package com.back.domain.user.service;
 
+import com.back.domain.board.comment.dto.MyCommentResponse;
+import com.back.domain.board.comment.repository.CommentRepository;
 import com.back.domain.board.common.dto.PageResponse;
 import com.back.domain.board.post.dto.PostListResponse;
 import com.back.domain.board.post.repository.PostRepository;
@@ -30,6 +32,7 @@ public class UserService {
     private final UserRepository userRepository;
     private final UserProfileRepository userProfileRepository;
     private final PostRepository postRepository;
+    private final CommentRepository commentRepository;
     private final PasswordEncoder passwordEncoder;
 
     /**
@@ -150,6 +153,24 @@ public PageResponse<PostListResponse> getMyPosts(Long userId, Pageable pageable)
         return PageResponse.from(page);
     }
 
+    /**
+     * 내 댓글 목록 조회 서비스
+     * 1. 사용자 조회 및 상태 검증
+     * 2. 댓글 목록 조회
+     * 3. PageResponse 반환
+     */
+    @Transactional(readOnly = true)
+    public PageResponse<MyCommentResponse> getMyComments(Long userId, Pageable pageable) {
+
+        // 사용자 조회 및 상태 검증
+        User user = getValidUser(userId);
+
+        // 댓글 목록 조회 및 응답 반환
+        Page<MyCommentResponse> page = commentRepository.findAllByUserId(user.getId(), pageable)
+                .map(MyCommentResponse::from);
+        return PageResponse.from(page);
+    }
+
     /**
      * 유효한 사용자 조회 및 상태 검증
      *