[Feat]#108 community 응답 필드 추가 및 수정

src/main/java/com/redo/domain/community/controller/CommunityController.java

@@ -77,11 +77,12 @@ public ApiResponse<CommunityPageResponseDTO> getCommunityPosts(
     // 커뮤니티 게시글 상세 조회 API
     @GetMapping("/{communityId}")
     public ApiResponse<CommunityDetailResponseDTO> getCommunityPost(
+            @AuthenticationPrincipal Long userId,
             @PathVariable Long communityId
     ) {
         return ApiResponse.onSuccess(
                 CommunitySuccessCode.GET_COMMUNITY_POST_SUCCESS,
-                communityService.getCommunityPost(communityId)
+                communityService.getCommunityPost(userId, communityId)
         );
     }
 

src/main/java/com/redo/domain/community/converter/CommunityConverter.java

@@ -72,7 +72,10 @@ public static CommunityDetailResponseDTO toCommunityDetailResponse(
             String writer,
             String profileImageUrl,
             String characterCode,
-            String imageUrl
+            List<String> imageUrls,
+            long numComments,
+            boolean isLiked,
+            boolean isMine
     ) {
         return new CommunityDetailResponseDTO(
                 community.getId(),
@@ -82,7 +85,12 @@ public static CommunityDetailResponseDTO toCommunityDetailResponse(
                 characterCode,
                 community.getContent(),
                 community.getCreatedAt(),
-                imageUrl
+                imageUrls,
+                String.valueOf(community.getCategory().getCode()),
+                numComments,
+                community.getLikeCount() == null ? 0 : community.getLikeCount(),
+                isLiked,
+                isMine
         );
     }
 

src/main/java/com/redo/domain/community/dto/res/CommunityDetailResponseDTO.java

@@ -1,6 +1,9 @@
 package com.redo.domain.community.dto.res;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
+
 import java.time.LocalDateTime;
+import java.util.List;
 
 public record CommunityDetailResponseDTO(
         Long id,
@@ -10,6 +13,12 @@ public record CommunityDetailResponseDTO(
         String characterCode,
         String content,
         LocalDateTime createdAt,
-        String imageUrl
+        List<String> imageUrls,
+        String category,
+        Long numComments,
+        Integer numLikes,
+        // ApiResponse 의 isSuccess 와 동일하게, Jackson 이 is 접두사를 떼지 않도록 이름을 고정한다.
+        @JsonProperty("isLiked") boolean isLiked,
+        @JsonProperty("isMine") boolean isMine
 ) {
 }

src/main/java/com/redo/domain/community/repository/CommunityCommentRepository.java

@@ -27,6 +27,9 @@ interface CommunityCommentCount {
         long getCommentCount();
     }
 
+    // 상세 조회용: 단일 게시글의 삭제되지 않은 댓글 수를 집계한다.
+    long countByCommunityAndDeletedAtIsNull(Community community);
+
     List<CommunityComment> findByCommunityAndIdGreaterThanAndDeletedAtIsNullOrderByIdAsc(
             Community community,
             Long cursor,

src/main/java/com/redo/domain/community/repository/CommunityImgRepository.java

@@ -5,11 +5,11 @@
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import java.util.List;
-import java.util.Optional;
 
 public interface CommunityImgRepository extends JpaRepository<CommunityImg, Long> {
 
-    Optional<CommunityImg> findFirstByCommunityOrderByDisplayOrderAsc(Community community);
+    // 상세 조회용: 단일 게시글의 첨부 이미지 전체를 display_order 오름차순으로 조회한다.
+    List<CommunityImg> findByCommunityOrderByDisplayOrderAsc(Community community);
 
     // 목록 조회용: 여러 게시글의 이미지를 한 번에 조회한다(display_order 오름차순, 게시글별 첫 항목이 대표 이미지).
     List<CommunityImg> findByCommunityInOrderByDisplayOrderAsc(List<Community> communities);

src/main/java/com/redo/domain/community/service/CommunityService.java

@@ -41,6 +41,7 @@
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.stream.Collectors;
 
 @Service
@@ -87,7 +88,7 @@ public Page<CommunityResponseDTO> getCommunityPosts(Integer category, Pageable p
     }
 
     // 게시글 상세 조회 로직
-    public CommunityDetailResponseDTO getCommunityPost(Long communityId) {
+    public CommunityDetailResponseDTO getCommunityPost(Long userId, Long communityId) {
         Community community = communityRepository.findByIdAndDeletedAtIsNull(communityId)
                 .orElseThrow(() -> new CommunityException(CommunityErrorCode.COMMUNITY_NOT_FOUND));
 
@@ -98,10 +99,24 @@ public CommunityDetailResponseDTO getCommunityPost(Long communityId) {
                 getNickname(profile),
                 getProfileImageUrl(profile),
                 getCharacterCode(profile),
-                getRepresentativeImageUrl(community)
+                getImageUrls(community),
+                communityCommentRepository.countByCommunityAndDeletedAtIsNull(community),
+                isLiked(userId, community),
+                isMine(userId, community)
         );
     }
 
+    // 조회자가 해당 게시글에 좋아요를 눌렀는지 판별하는 로직
+    private boolean isLiked(Long userId, Community community) {
+        return userId != null
+                && communityLikeRepository.existsById(new CommunityLikeId(community.getId(), userId));
+    }
+
+    // 조회자가 해당 게시글의 작성자인지 판별하는 로직
+    private boolean isMine(Long userId, Community community) {
+        return userId != null && userId.equals(community.getUser().getId());
+    }
+
     // 게시글 등록 로직
     @Transactional
     public CommunityCreateResponseDTO createCommunityPost(Long userId, CommunityCreateRequestDTO request) {
@@ -312,12 +327,13 @@ private Map<Long, String> getRepresentativeImageKeys(List<Community> communities
                 ));
     }
 
-    // 대표 이미지(display_order 최솟값)의 S3 객체 키를 조회용 Presigned URL로 변환하는 로직
-    private String getRepresentativeImageUrl(Community community) {
-        return communityImgRepository.findFirstByCommunityOrderByDisplayOrderAsc(community)
+    // 상세 조회용: 첨부 이미지 전체의 S3 객체 키를 등록 순서(display_order)대로 Presigned URL로 변환하는 로직
+    private List<String> getImageUrls(Community community) {
+        return communityImgRepository.findByCommunityOrderByDisplayOrderAsc(community).stream()
                 .map(CommunityImg::getImageKey)
                 .map(this::createImageUrl)
-                .orElse(null);
+                .filter(Objects::nonNull)
+                .toList();
     }
 
     // S3 객체 키를 이미지 조회용 Presigned URL로 변환하는 로직