Feat: 게시글 단건 조회 시 좋아요/북마크 여부 추가

Author: joyewon0705

src/main/java/com/back/domain/board/comment/controller/CommentControllerDocs.java

@@ -539,7 +539,8 @@ ResponseEntity<RsData<Void>> deleteComment(
                                         "parentId": 25,
                                         "author": {
                                           "id": 7,
-                                          "nickname": "이몽룡"
+                                          "nickname": "이몽룡",
+                                          "profileImageUrl": null
                                         },
                                         "content": "저도 동의합니다!",
                                         "createdAt": "2025-09-22T13:30:00",

src/main/java/com/back/domain/board/post/controller/PostController.java

@@ -59,9 +59,12 @@ public ResponseEntity<RsData<PageResponse<PostListResponse>>> getPosts(
     // 게시글 단건 조회
     @GetMapping("/{postId}")
     public ResponseEntity<RsData<PostDetailResponse>> getPost(
-            @PathVariable Long postId
+            @PathVariable Long postId,
+            @AuthenticationPrincipal CustomUserDetails user
     ) {
-        PostDetailResponse response = postService.getPost(postId);
+        PostDetailResponse response = (user != null)
+                ? postService.getPostWithUser(postId, user.getUserId())
+                : postService.getPost(postId);
         return ResponseEntity
                 .status(HttpStatus.OK)
                 .body(RsData.success(

src/main/java/com/back/domain/board/post/controller/PostControllerDocs.java

@@ -43,7 +43,8 @@ public interface PostControllerDocs {
                                         "postId": 101,
                                         "author": {
                                           "id": 5,
-                                          "nickname": "홍길동"
+                                          "nickname": "홍길동",
+                                          "profileImageUrl": null
                                         },
                                         "title": "첫 번째 게시글",
                                         "content": "안녕하세요, 첫 글입니다!",
@@ -171,7 +172,7 @@ ResponseEntity<RsData<PostResponse>> createPost(
                                         "items": [
                                           {
                                             "postId": 1,
-                                            "author": { "id": 10, "nickname": "홍길동" },
+                                            "author": { "id": 10, "nickname": "홍길동", "profileImageUrl": null },
                                             "title": "첫 글",
                                             "categories": [{ "id": 1, "name": "공지사항" }],
                                             "likeCount": 5,
@@ -247,7 +248,7 @@ ResponseEntity<RsData<PageResponse<PostListResponse>>> getPosts(
                                       "message": "게시글이 조회되었습니다.",
                                       "data": {
                                         "postId": 101,
-                                        "author": { "id": 5, "nickname": "홍길동" },
+                                        "author": { "id": 5, "nickname": "홍길동", "profileImageUrl": null },
                                         "title": "첫 번째 게시글",
                                         "content": "안녕하세요, 첫 글입니다!",
                                         "categories": [
@@ -257,6 +258,8 @@ ResponseEntity<RsData<PageResponse<PostListResponse>>> getPosts(
                                         "likeCount": 10,
                                         "bookmarkCount": 2,
                                         "commentCount": 3,
+                                        "likedByMe": false,
+                                        "bookmarkedByMe": false,
                                         "createdAt": "2025-09-22T10:30:00",
                                         "updatedAt": "2025-09-22T10:30:00"
                                       }
@@ -296,7 +299,8 @@ ResponseEntity<RsData<PageResponse<PostListResponse>>> getPosts(
             )
     })
     ResponseEntity<RsData<PostDetailResponse>> getPost(
-            @PathVariable Long postId
+            @PathVariable Long postId,
+            @AuthenticationPrincipal CustomUserDetails user
     );
 
     @Operation(
@@ -318,7 +322,8 @@ ResponseEntity<RsData<PostDetailResponse>> getPost(
                                         "postId": 101,
                                         "author": {
                                           "id": 5,
-                                          "nickname": "홍길동"
+                                          "nickname": "홍길동",
+                                          "profileImageUrl": null
                                         },
                                         "title": "수정된 게시글",
                                         "content": "안녕하세요, 수정했습니다!",

src/main/java/com/back/domain/board/post/dto/PostDetailResponse.java

@@ -29,10 +29,16 @@ public record PostDetailResponse(
         long likeCount,
         long bookmarkCount,
         long commentCount,
+        Boolean likedByMe,
+        Boolean bookmarkedByMe,
         LocalDateTime createdAt,
         LocalDateTime updatedAt
 ) {
     public static PostDetailResponse from(Post post) {
+        return from(post, false, false);
+    }
+
+    public static PostDetailResponse from(Post post, boolean likedByMe, boolean bookmarkedByMe) {
         return new PostDetailResponse(
                 post.getId(),
                 AuthorResponse.from(post.getUser()),
@@ -44,6 +50,8 @@ public static PostDetailResponse from(Post post) {
                 post.getPostLikes().size(),
                 post.getPostBookmarks().size(),
                 post.getComments().size(),
+                likedByMe,
+                bookmarkedByMe,
                 post.getCreatedAt(),
                 post.getUpdatedAt()
         );

src/main/java/com/back/domain/board/post/service/PostService.java

@@ -7,7 +7,9 @@
 import com.back.domain.board.post.dto.PostListResponse;
 import com.back.domain.board.post.dto.PostRequest;
 import com.back.domain.board.post.dto.PostResponse;
+import com.back.domain.board.post.repository.PostBookmarkRepository;
 import com.back.domain.board.post.repository.PostCategoryRepository;
+import com.back.domain.board.post.repository.PostLikeRepository;
 import com.back.domain.board.post.repository.PostRepository;
 import com.back.domain.user.entity.User;
 import com.back.domain.user.repository.UserRepository;
@@ -26,6 +28,8 @@
 @Transactional
 public class PostService {
     private final PostRepository postRepository;
+    private final PostLikeRepository postLikeRepository;
+    private final PostBookmarkRepository postBookmarkRepository;
     private final UserRepository userRepository;
     private final PostCategoryRepository postCategoryRepository;
 
@@ -85,6 +89,18 @@ public PostDetailResponse getPost(Long postId) {
         return PostDetailResponse.from(post);
     }
 
+    // TODO: 로그인 회원용 게시글 단건 조회 서비스, 추후 리팩토링 필요
+    @Transactional(readOnly = true)
+    public PostDetailResponse getPostWithUser(Long postId, Long userId) {
+        Post post = postRepository.findById(postId)
+                .orElseThrow(() -> new CustomException(ErrorCode.POST_NOT_FOUND));
+
+        boolean likedByMe = postLikeRepository.existsByUserIdAndPostId(userId, postId);
+        boolean bookmarkedByMe = postBookmarkRepository.existsByUserIdAndPostId(userId, postId);
+
+        return PostDetailResponse.from(post, likedByMe, bookmarkedByMe);
+    }
+
     /**
      * 게시글 수정 서비스
      * 1. Post 조회