feat: 리액션 API 추가 및 추천리스트 API, 리스트 상세조회 API 재구현

src/main/java/com/listywave/common/auth/AuthorizationInterceptor.java

@@ -21,7 +21,7 @@
 public class AuthorizationInterceptor implements HandlerInterceptor {
 
     private static final UriAndMethod[] whiteList = {
-            new UriAndMethod("/lists/explore", GET),
+            new UriAndMethod("/lists/recommended", GET),
             new UriAndMethod("/lists/search", GET),
             new UriAndMethod("/lists/{listId}/comments", GET),
             new UriAndMethod("/lists/upload-url", GET),

src/main/java/com/listywave/list/application/domain/list/ListEntity.java

@@ -266,4 +266,8 @@ public void validateUpdateAuthority(User loginUser, Collaborators beforeCollabor
     public void increaseUpdateCount() {
         this.updateCount++;
     }
+
+    public boolean isOwner(User loginUser) {
+        return this.user.equals(loginUser);
+    }
 }

src/main/java/com/listywave/list/application/dto/response/ListDetailResponse.java

@@ -5,6 +5,7 @@
 import com.listywave.list.application.domain.item.Item;
 import com.listywave.list.application.domain.label.Label;
 import com.listywave.list.application.domain.list.ListEntity;
+import com.listywave.reaction.application.dto.response.ReactionResponse;
 import com.listywave.user.application.domain.User;
 import jakarta.annotation.Nullable;
 import java.time.LocalDateTime;
@@ -29,20 +30,24 @@ public record ListDetailResponse(
         boolean isPublic,
         String backgroundPalette,
         String backgroundColor,
-        int collectCount,
+        Integer collectCount,
         int viewCount,
+        int updateCount,
         long totalCommentCount,
-        @Nullable NewestComment newestComment
+        @Nullable NewestComment newestComment,
+        List<ReactionResponse> reactions
 ) {
 
     public static ListDetailResponse of(
             ListEntity list,
             User owner,
+            boolean isOwner,
             boolean isCollected,
             List<Collaborator> collaborators,
             long totalCommentCount,
             Comment newestComment,
-            Long totalReplyCount
+            Long totalReplyCount,
+            List<ReactionResponse> reactions
     ) {
         return ListDetailResponse.builder()
                 .categoryEngName(list.getCategory().name().toLowerCase())
@@ -61,10 +66,12 @@ public static ListDetailResponse of(
                 .isPublic(list.isPublic())
                 .backgroundColor(list.getBackgroundColor().name())
                 .backgroundPalette(list.getBackgroundPalette().name())
-                .collectCount(list.getCollectCount())
+                .collectCount(isOwner ? list.getCollectCount() : null)
                 .viewCount(list.getViewCount())
+                .updateCount(list.getUpdateCount())
                 .totalCommentCount(totalCommentCount)
                 .newestComment(NewestComment.of(newestComment, totalReplyCount))
+                .reactions(reactions)
                 .build();
     }
 

src/main/java/com/listywave/list/application/dto/response/RecommendedListResponse.java

@@ -0,0 +1,54 @@
+package com.listywave.list.application.dto.response;
+
+import com.listywave.list.application.domain.item.Item;
+import com.listywave.list.application.domain.list.ListEntity;
+import lombok.Builder;
+
+import java.util.List;
+
+@Builder
+public record RecommendedListResponse(
+        Long id,
+        Long ownerId,
+        String ownerNickname,
+        String title,
+        String itemImageUrl,
+        String category,
+        String backgroundColor,
+        List<Top3ItemResponse> items
+) {
+    public static RecommendedListResponse of(ListEntity list) {
+        return RecommendedListResponse.builder()
+                .id(list.getId())
+                .ownerId(list.getUser().getId())
+                .ownerNickname(list.getUser().getNickname())
+                .title(list.getTitle().getValue())
+                .itemImageUrl(list.getRepresentImageUrl())
+                .category(list.getCategory().getViewName())
+                .backgroundColor(list.getBackgroundColor().name())
+                .items(Top3ItemResponse.toList(list.getTop3Items().getValues()))
+                .build();
+    }
+
+    @Builder
+    public record Top3ItemResponse(
+            Long id,
+            int rank,
+            String title
+    ) {
+
+        public static List<Top3ItemResponse> toList(List<Item> items) {
+            return items.stream()
+                    .map(Top3ItemResponse::of)
+                    .toList();
+        }
+
+        public static Top3ItemResponse of(Item item) {
+            return Top3ItemResponse.builder()
+                    .id(item.getId())
+                    .rank(item.getRanking())
+                    .title(item.getTitle().getValue())
+                    .build();
+        }
+    }
+}

src/main/java/com/listywave/list/application/service/ListService.java

@@ -32,7 +32,7 @@
 import com.listywave.list.application.dto.response.ListDetailResponse;
 import com.listywave.list.application.dto.response.ListRecentResponse;
 import com.listywave.list.application.dto.response.ListSearchResponse;
-import com.listywave.list.application.dto.response.ListTrandingResponse;
+import com.listywave.list.application.dto.response.RecommendedListResponse;
 import com.listywave.list.presentation.dto.request.ItemCreateRequest;
 import com.listywave.list.presentation.dto.request.ListCreateRequest;
 import com.listywave.list.presentation.dto.request.ListUpdateRequest;
@@ -41,6 +41,8 @@
 import com.listywave.list.repository.label.LabelRepository;
 import com.listywave.list.repository.list.ListRepository;
 import com.listywave.list.repository.reply.ReplyRepository;
+import com.listywave.reaction.application.dto.response.ReactionResponse;
+import com.listywave.reaction.application.service.ReactionService;
 import com.listywave.user.application.domain.Follow;
 import com.listywave.user.application.domain.User;
 import com.listywave.user.application.dto.FindFeedListResponse;
@@ -75,6 +77,7 @@ public class ListService {
     private final AlarmRepository alarmRepository;
     private final CollaboratorService collaboratorService;
     private final HistoryService historyService;
+    private final ReactionService reactionService;
     private final ApplicationEventPublisher applicationEventPublisher;
 
     public ListCreateResponse listCreate(ListCreateRequest request, Long loginUserId) {
@@ -134,21 +137,33 @@ public ListDetailResponse getListDetail(Long listId, Long loginUserId) {
         list.validateOwnerIsNotDeleted();
         List<Collaborator> collaborators = collaboratorService.findAllByList(list).collaborators();
 
-        boolean isCollected = false;
-        if (loginUserId != null) {
-            User user = userRepository.getById(loginUserId);
-            isCollected = collectionRepository.existsByListAndUserId(list, user.getId());
-        }
+        User user = getUserIfLoggedIn(loginUserId);
+        boolean isCollected = checkIsCollected(list, user);
+        boolean isOwner = checkIsOwner(list, user);
 
+        List<ReactionResponse> reactions = reactionService.createReactionResponses(list, user, isOwner);
         long totalCommentCount = commentRepository.countCommentsByList(list);
         Comment newestComment = commentRepository.findFirstByListOrderByCreatedDateDesc(list);
         Long totalReplyCount = replyRepository.countByComment(newestComment);
-        return ListDetailResponse.of(list, list.getUser(), isCollected, collaborators, totalCommentCount, newestComment, totalReplyCount);
+        return ListDetailResponse.of(
+                list,
+                list.getUser(),
+                isOwner,
+                isCollected,
+                collaborators,
+                totalCommentCount,
+                newestComment,
+                totalReplyCount,
+                reactions
+        );
     }
 
     @Transactional(readOnly = true)
-    public List<ListTrandingResponse> fetchTrandingLists() {
-        return listRepository.fetchTrandingLists();
+    public List<RecommendedListResponse> getRecommendedLists() {
+        List<ListEntity> recommendedLists = listRepository.findRecommendedLists();
+        return recommendedLists.stream()
+                .map(RecommendedListResponse::of)
+                .toList();
     }
 
     public void deleteList(Long listId, Long loginUserId) {
@@ -312,4 +327,16 @@ public void changeVisibility(Long loginUserId, Long listId) {
         list.validateOwner(user);
         list.updateVisibility();
     }
+
+    private User getUserIfLoggedIn(Long loginUserId) {
+        return (loginUserId != null) ? userRepository.getById(loginUserId) : null;
+    }
+
+    private boolean checkIsCollected(ListEntity list, User user) {
+        return (user != null) && collectionRepository.existsByListAndUserId(list, user.getId());
+    }
+
+    private boolean checkIsOwner(ListEntity list, User user) {
+        return (user != null) && list.isOwner(user);
+    }
 }

src/main/java/com/listywave/list/presentation/controller/ListController.java

@@ -8,7 +8,7 @@
 import com.listywave.list.application.dto.response.ListDetailResponse;
 import com.listywave.list.application.dto.response.ListRecentResponse;
 import com.listywave.list.application.dto.response.ListSearchResponse;
-import com.listywave.list.application.dto.response.ListTrandingResponse;
+import com.listywave.list.application.dto.response.RecommendedListResponse;
 import com.listywave.list.application.service.ListService;
 import com.listywave.list.presentation.dto.request.ListCreateRequest;
 import com.listywave.list.presentation.dto.request.ListUpdateRequest;
@@ -54,10 +54,10 @@ ResponseEntity<ListDetailResponse> getListDetail(
         return ResponseEntity.ok(listDetailResponse);
     }
 
-    @GetMapping("/lists/explore")
-    ResponseEntity<List<ListTrandingResponse>> fetchTrandingLists() {
-        List<ListTrandingResponse> trandingList = listService.fetchTrandingLists();
-        return ResponseEntity.ok().body(trandingList);
+    @GetMapping("/lists/recommended")
+    ResponseEntity<List<RecommendedListResponse>> getRecommendedLists() {
+        List<RecommendedListResponse> recommendedLists = listService.getRecommendedLists();
+        return ResponseEntity.ok().body(recommendedLists);
     }
 
     @DeleteMapping("/lists/{listId}")

src/main/java/com/listywave/list/repository/list/custom/CustomListRepository.java

@@ -2,7 +2,6 @@
 
 import com.listywave.list.application.domain.category.CategoryType;
 import com.listywave.list.application.domain.list.ListEntity;
-import com.listywave.list.application.dto.response.ListTrandingResponse;
 import com.listywave.user.application.domain.User;
 import java.time.LocalDateTime;
 import java.util.List;
@@ -11,7 +10,7 @@
 
 public interface CustomListRepository {
 
-    List<ListTrandingResponse> fetchTrandingLists();
+    List<ListEntity> findRecommendedLists();
 
     Slice<ListEntity> getRecentLists(LocalDateTime cursorUpdatedDate, CategoryType category, Pageable pageable);
 

src/main/java/com/listywave/list/repository/list/custom/impl/CustomListRepositoryImpl.java

@@ -5,28 +5,21 @@
 import static com.listywave.common.exception.ErrorCode.NOT_SUPPORT_FILTER_ARGUMENT_EXCEPTION;
 import static com.listywave.common.util.PaginationUtils.checkEndPage;
 import static com.listywave.list.application.domain.category.CategoryType.ENTIRE;
-import static com.listywave.list.application.domain.comment.QComment.comment;
 import static com.listywave.list.application.domain.item.QItem.item;
 import static com.listywave.list.application.domain.list.QListEntity.listEntity;
-import static com.listywave.list.application.domain.reply.QReply.reply;
+import static com.listywave.reaction.application.domain.QReactionStats.reactionStats;
 import static com.listywave.user.application.domain.QUser.user;
-import static com.querydsl.jpa.JPAExpressions.select;
 
 import com.listywave.common.exception.CustomException;
 import com.listywave.list.application.domain.category.CategoryType;
 import com.listywave.list.application.domain.list.ListEntity;
-import com.listywave.list.application.dto.response.ListTrandingResponse;
 import com.listywave.list.repository.list.custom.CustomListRepository;
 import com.listywave.user.application.domain.User;
-import com.querydsl.core.types.ExpressionUtils;
-import com.querydsl.core.types.Projections;
 import com.querydsl.core.types.dsl.BooleanExpression;
-import com.querydsl.core.types.dsl.Expressions;
-import com.querydsl.core.types.dsl.NumberPath;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import java.time.LocalDateTime;
+import java.util.Comparator;
 import java.util.List;
-import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Slice;
@@ -36,64 +29,39 @@ public class CustomListRepositoryImpl implements CustomListRepository {
 
     private final JPAQueryFactory queryFactory;
 
-    @Override
-    public List<ListTrandingResponse> fetchTrandingLists() {
-        List<ListTrandingResponse> responses = getTrandingResponses();
-        return responses.stream()
-                .map(t -> t.with(getRepresentImageUrl(t.id())))
-                .collect(Collectors.toList());
+    public List<ListEntity> findRecommendedLists() {
+        List<Long> recommendedListIds = findRecommendedListIds();
+        return findRecommendedListsByIds(recommendedListIds);
     }
 
-    private List<ListTrandingResponse> getTrandingResponses() {
+    public List<Long> findRecommendedListIds() {
         LocalDateTime thirtyDaysAgo = LocalDateTime.now().minusDays(30);
-        NumberPath<Long> trandingScoreAlias = Expressions.numberPath(Long.class, "trandingScore");
-
         return queryFactory
-                .select(Projections.constructor(ListTrandingResponse.class,
-                        listEntity.id.as("id"),
-                        listEntity.user.id.as("ownerId"),
-                        listEntity.user.nickname.value.as("ownerNickname"),
-                        listEntity.user.profileImageUrl.value.as("ownerProfileImageUrl"),
-                        listEntity.title.value.as("title"),
-                        listEntity.description.value.as("description"),
-                        listEntity.backgroundColor.as("backgroundColor"),
-                        ExpressionUtils.as(
-                                select(
-                                        listEntity.collectCount.multiply(3).add(
-                                                comment.countDistinct().add(reply.count()).multiply(2)
-                                        ).castToNum(Long.class)
-                                )
-                                        .from(comment)
-                                        .leftJoin(reply).on(reply.comment.id.eq(comment.id))
-                                        .where(comment.list.id.eq(listEntity.id)), trandingScoreAlias))
-                )
-                .from(listEntity)
+                .select(reactionStats.list.id)
+                .from(reactionStats)
+                .join(reactionStats.list, listEntity)
                 .join(listEntity.user, user)
                 .where(
-                        listEntity.updatedDate.goe(thirtyDaysAgo),
+                        reactionStats.updatedDate.goe(thirtyDaysAgo),
                         listEntity.isPublic.eq(true),
                         listEntity.user.isDelete.eq(false)
                 )
-                .distinct()
-                .orderBy(trandingScoreAlias.desc())
+                .groupBy(reactionStats.list.id)
+                .orderBy(reactionStats.count.sum().desc(), listEntity.updatedDate.desc())
                 .limit(10)
                 .fetch();
     }
 
-    private String getRepresentImageUrl(Long id) {
-        String imageUrl = queryFactory
-                .select(item.imageUrl.value)
-                .from(item)
-                .where(
-                        item.list.id.eq(id).and(
-                                item.imageUrl.value.ne("")
-                        )
-                )
-                .orderBy(item.ranking.asc())
-                .limit(1)
-                .fetchOne();
+    public List<ListEntity> findRecommendedListsByIds(List<Long> listIds) {
+        List<ListEntity> recommendedLists = queryFactory
+                .selectFrom(listEntity)
+                .join(listEntity.user, user).fetchJoin()
+                .leftJoin(item).on(listEntity.id.eq(item.list.id))
+                .where(listEntity.id.in(listIds))
+                .fetch();
 
-        return imageUrl != null ? imageUrl : "";
+        recommendedLists.sort(Comparator.comparingInt(o -> listIds.indexOf(o.getId())));
+        return recommendedLists;
     }
 
     @Override