feat: 영상 목록 hasUnreadFeedback 구현 (#121)

src/main/java/com/slatto/domain/notification/repository/NotificationRepository.java

@@ -124,22 +124,22 @@ List<Notification> findUnreadGroupedNotificationsForUpdate(
         Pageable pageable
     );
 
-    // 미읽음 그룹 알림이 없으면 누적 개수는 0이다.
     @Query("""
-        select coalesce(max(n.groupCount), 0)
+        select n.targetId, coalesce(max(n.groupCount), 0)
         from Notification n
         where n.user.id = :userId
             and n.type = :type
             and n.targetType = :targetType
-            and n.targetId = :targetId
+            and n.targetId in :targetIds
             and n.isRead = false
             and n.deletedAt is null
+        group by n.targetId
         """)
-    int findUnreadGroupedNotificationCount(
+    List<Object[]> findUnreadGroupedNotificationCounts(
         @Param("userId") Long userId,
         @Param("type") NotificationType type,
         @Param("targetType") String targetType,
-        @Param("targetId") Long targetId
+        @Param("targetIds") List<Long> targetIds
     );
 
     @Modifying(clearAutomatically = true, flushAutomatically = true)

src/main/java/com/slatto/domain/notification/service/NotificationService.java

@@ -20,8 +20,10 @@
 import java.time.LocalDateTime;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
+import java.util.stream.Collectors;
 import java.util.function.IntFunction;
 
 @Service
@@ -101,18 +103,24 @@ public void markAllNotificationsAsRead(Long currentUserId) {
     }
 
     /**
-     * 영상 카드의 미읽은 피드백 개수에 사용할 그룹 알림 누적 개수를 조회한다.
+     * 영상 목록의 미읽은 피드백 누적 개수를 한 번에 조회한다.
      */
-    public int getUnreadVideoFeedbackCount(Long currentUserId, Long videoId) {
+    public Map<Long, Integer> getUnreadVideoFeedbackCounts(Long currentUserId, List<Long> videoIds) {
         validateActiveUser(currentUserId);
-        validateRequiredId(videoId);
+        if (videoIds.isEmpty()) {
+            return Map.of();
+        }
 
-        return notificationRepository.findUnreadGroupedNotificationCount(
-            currentUserId,
-            NotificationType.VIDEO_FEEDBACK_COMMENTED,
-            NotificationTargetType.VIDEO.name(),
-            videoId
-        );
+        return notificationRepository.findUnreadGroupedNotificationCounts(
+                currentUserId,
+                NotificationType.VIDEO_FEEDBACK_COMMENTED,
+                NotificationTargetType.VIDEO.name(),
+                videoIds
+            ).stream()
+            .collect(Collectors.toMap(
+                row -> (Long) row[0],
+                row -> ((Number) row[1]).intValue()
+            ));
     }
 
     @Transactional

src/main/java/com/slatto/domain/video/dto/response/VideoResponse.java

@@ -22,19 +22,18 @@ public record VideoDetailResDTO(
             String thumbnailUrl,
             @Schema(description = "영상 진행 상태", example = "IN_PROGRESS") String progressStatus,
             @Schema(description = "로그인한 사용자의 북마크 여부", example = "true") boolean bookmarked,
-            @Schema(description = "로그인한 사용자의 읽지 않은 피드백 개수", example = "0")
-            int unreadCommentCount,
             @Schema(description = "프로젝트 소개", example = "프로젝트 소개글") String description,
             @Schema(description = "영상 메모", example = "영상에 관련된 메모", nullable = true) String memo,
             @Schema(description = "프로젝트 태그", example = "[\"뮤직비디오\", \"단편\", \"외주\", \"연출\"]")
             List<String> projectTags,
             @Schema(description = "생성일", example = "2026-05-20T00:00:00") LocalDateTime createdAt,
             @Schema(description = "수정일", example = "2026-05-25T00:00:00") LocalDateTime updatedAt
     ) {
-        public static VideoDetailResDTO from(Video video, boolean bookmarked, List<String> projectTags) {
-            // TODO: 피드백 도메인의 사용자별 읽지 않은 피드백 개수 조회 기능 연동 후 실제 값으로 교체
-            int unreadCommentCount = 0;
-
+        public static VideoDetailResDTO from(
+                Video video,
+                boolean bookmarked,
+                List<String> projectTags
+        ) {
             return new VideoDetailResDTO(
                     video.getId(),
                     video.getProject().getId(),
@@ -44,7 +43,6 @@ public static VideoDetailResDTO from(Video video, boolean bookmarked, List<Strin
                     video.getThumbnailUrl(),
                     video.getProgressStatus().name(),
                     bookmarked,
-                    unreadCommentCount,
                     video.getProject().getDescription(),
                     video.getMemo(),
                     projectTags,
@@ -132,14 +130,15 @@ public record VideoItemResDTO(
             @Schema(example = "https://img.youtube.com/vi/abc123/maxresdefault.jpg") String thumbnailUrl,
             @Schema(example = "true") boolean bookmarked,
             @Schema(example = "IN_PROGRESS") String progressStatus,
-            @Schema(example = "3") int unreadCommentCount,
+            @Schema(description = "읽지 않은 피드백 존재 여부", example = "true")
+            boolean hasUnreadFeedback,
             LocalDateTime createdAt,
             LocalDateTime updatedAt
     ) {
-        public static VideoItemResDTO from(Video video, boolean bookmarked) {
+        public static VideoItemResDTO from(Video video, boolean bookmarked, boolean hasUnreadFeedback) {
             return new VideoItemResDTO(
                     video.getId(), video.getTitle(), video.getThumbnailUrl(), bookmarked,
-                    video.getProgressStatus().name(), 0, video.getCreatedAt(), video.getUpdatedAt()
+                    video.getProgressStatus().name(), hasUnreadFeedback, video.getCreatedAt(), video.getUpdatedAt()
             );
         }
     }

src/main/java/com/slatto/domain/video/service/VideoService.java

@@ -1,6 +1,7 @@
 package com.slatto.domain.video.service;
 
 import com.slatto.domain.project.entity.Project;
+import com.slatto.domain.notification.service.NotificationService;
 import com.slatto.domain.project.enums.LengthType;
 import com.slatto.domain.user.enums.CategoryName;
 import com.slatto.domain.user.enums.Kind;
@@ -32,6 +33,7 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.stream.Stream;
 
@@ -53,6 +55,7 @@ public class VideoService {
     private final VideoProjectAccessRepository projectAccessRepository;
     private final VideoRepository videoRepository;
     private final VideoBookmarkRepository videoBookmarkRepository;
+    private final NotificationService notificationService;
     private final YoutubeUrlParser youtubeUrlParser;
     private final YoutubeApiClient youtubeApiClient;
 
@@ -192,10 +195,15 @@ public VideoListResDTO getVideos(Long memberId, Long projectId, Long cursor, Int
         Set<Long> bookmarkedVideoIds = videoIds.isEmpty()
                 ? Set.of()
                 : Set.copyOf(videoBookmarkRepository.findBookmarkedVideoIdsByUserIdAndVideoIds(memberId, videoIds));
+        Map<Long, Integer> unreadCommentCounts = notificationService.getUnreadVideoFeedbackCounts(
+                memberId,
+                videoIds
+        );
         List<VideoItemResDTO> items = currentPageVideos.stream()
                 .map(video -> VideoItemResDTO.from(
                         video,
-                        bookmarkedVideoIds.contains(video.getId())
+                        bookmarkedVideoIds.contains(video.getId()),
+                        unreadCommentCounts.getOrDefault(video.getId(), 0) > 0
                 ))
                 .toList();
         Long nextCursor = hasNext && !items.isEmpty() ? items.getLast().videoId() : null;