[FIX] 관심글 조회 API 케이스 분류

src/main/java/org/websoso/WSSServer/dto/feed/InterestFeedsGetResponse.java

@@ -1,12 +1,22 @@
 package org.websoso.WSSServer.dto.feed;
 
+import static com.fasterxml.jackson.annotation.JsonInclude.Include.NON_NULL;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
 import java.util.List;
 
 public record InterestFeedsGetResponse(
- List<InterestFeedGetResponse> recommendFeeds
+ List<InterestFeedGetResponse> recommendFeeds,
+
+ @JsonInclude(NON_NULL)
+ String message
 ) {
 
  public static InterestFeedsGetResponse of(List<InterestFeedGetResponse> interestFeedGetResponses) {
- return new InterestFeedsGetResponse(interestFeedGetResponses);
+ return new InterestFeedsGetResponse(interestFeedGetResponses, null);
+ }
+
+ public static InterestFeedsGetResponse of(List<InterestFeedGetResponse> interestFeedGetResponses, String message) {
+ return new InterestFeedsGetResponse(interestFeedGetResponses, message);
  }
 }

src/main/java/org/websoso/WSSServer/service/FeedService.java

@@ -9,6 +9,7 @@
 import static org.websoso.WSSServer.exception.error.CustomUserError.PRIVATE_PROFILE_STATUS;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -269,12 +270,21 @@ public InterestFeedsGetResponse getInterestFeeds(User user) {
  .map(UserNovel::getNovel)
  .toList();
 
+ if (interestNovels.isEmpty()) {
+ return InterestFeedsGetResponse.of(Collections.emptyList(), "NO_INTEREST_NOVELS");
+ }
+
  Map<Long, Novel> novelMap = interestNovels
  .stream()
  .collect(Collectors.toMap(Novel::getNovelId, novel -> novel));
  List<Long> interestNovelIds = new ArrayList<>(novelMap.keySet());
 
  List<Feed> interestFeeds = feedRepository.findTop10ByNovelIdInOrderByFeedIdDesc(interestNovelIds);
+
+ if (interestFeeds.isEmpty()) {
+ return InterestFeedsGetResponse.of(Collections.emptyList(), "NO_ASSOCIATED_FEEDS");
+ }
+
  Set<Byte> avatarIds = interestFeeds.stream()
  .map(feed -> feed.getUser().getAvatarId())
  .collect(Collectors.toSet());