페이지네이션 처리 시 최대 다음 페이지 수를 5개로 제한

backend/src/main/java/codezap/global/pagination/FixedPage.java

@@ -0,0 +1,6 @@
+package codezap.global.pagination;
+
+import java.util.List;
+
+public record FixedPage<T> (List<T> contents, int nextPages) {
+}

backend/src/main/java/codezap/global/pagination/FixedPageCounter.java

@@ -0,0 +1,32 @@
+package codezap.global.pagination;
+
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Component;
+
+import com.querydsl.core.types.dsl.BooleanExpression;
+import com.querydsl.core.types.dsl.EntityPathBase;
+import com.querydsl.jpa.impl.JPAQueryFactory;
+
+@Component
+public class FixedPageCounter {
+
+    private static final int MAXIMUM_PAGE = 5;
+
+    public int countNextFixedPage(
+            JPAQueryFactory queryFactory,
+            EntityPathBase<?> entityPath,
+            Pageable pageable,
+            BooleanExpression... conditions
+    ) {
+        int maximumElementsCount = pageable.getPageSize() * MAXIMUM_PAGE;
+        long nextFixedElementCounts = queryFactory
+                .selectFrom(entityPath)
+                .where(conditions)
+                .offset(pageable.getOffset())
+                .limit(maximumElementsCount)
+                .fetch()
+                .size();
+
+        return (int) Math.ceil((double) nextFixedElementCounts / pageable.getPageSize());
+    }
+}

backend/src/main/java/codezap/likes/repository/LikesJpaRepository.java

@@ -1,10 +1,6 @@
 package codezap.likes.repository;
 
-import org.springframework.data.domain.Page;
-import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.query.Param;
 
 import codezap.likes.domain.Likes;
 import codezap.member.domain.Member;
@@ -17,11 +13,4 @@ public interface LikesJpaRepository extends JpaRepository<Likes, Long> {
     boolean existsByMemberAndTemplate(Member member, Template template);
 
     long countByTemplate(Template template);
-
-    @Query("""
-            SELECT l.template
-            FROM Likes l
-            WHERE l.member.id = :memberId AND (l.template.member.id = :memberId OR l.template.visibility = 'PUBLIC')
-            """)
-    Page<Template> findAllByMemberId(@Param(value = "memberId") Long memberId, Pageable pageable);
 }

backend/src/main/java/codezap/likes/repository/LikesRepository.java

@@ -2,8 +2,6 @@
 
 import java.util.List;
 
-import org.springframework.data.domain.Page;
-import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Repository;
 
 import codezap.likes.domain.Likes;
@@ -37,8 +35,4 @@ public void deleteByMemberAndTemplate(Member member, Template template) {
     public void deleteAllByTemplateIds(List<Long> templateIds) {
         likesQueryDslRepository.deleteAllByTemplateIds(templateIds);
     }
-
-    public Page<Template> findAllByMemberId(Long memberId, Pageable pageable) {
-        return likesJpaRepository.findAllByMemberId(memberId, pageable);
-    }
 }

backend/src/main/java/codezap/likes/service/LikesService.java

@@ -2,11 +2,11 @@
 
 import java.util.List;
 
-import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import codezap.global.pagination.FixedPage;
 import codezap.likes.domain.Likes;
 import codezap.likes.repository.LikesRepository;
 import codezap.member.domain.Member;
@@ -37,10 +37,6 @@ public boolean isLiked(Member member, Template template) {
         return likesRepository.existsByMemberAndTemplate(member, template);
     }
 
-    public Page<Template> findAllByMemberId(Long memberId, Pageable pageable) {
-        return likesRepository.findAllByMemberId(memberId, pageable);
-    }
-
     @Transactional
     public void cancelLike(Member member, long templateId) {
         Template template = templateRepository.fetchById(templateId);

backend/src/main/java/codezap/template/dto/response/FindAllTemplatesResponse.java

@@ -5,10 +5,8 @@
 import io.swagger.v3.oas.annotations.media.Schema;
 
 public record FindAllTemplatesResponse(
-        @Schema(description = "전체 페이지 개수", example = "1")
-        int totalPages,
-        @Schema(description = "총 템플릿 개수", example = "134")
-        long totalElements,
+        @Schema(description = "최대 페이지 개수, 최대 5개입니다.", example = "1")
+        int maxPages,
         @Schema(description = "템플릿 목록")
         List<FindAllTemplateItemResponse> templates
 ) {

backend/src/main/java/codezap/template/repository/TemplateQueryDSLRepository.java

@@ -1,18 +1,17 @@
 package codezap.template.repository;
 
-import static codezap.template.domain.QTemplate.template;
-
 import java.util.List;
-import java.util.Objects;
 
-import org.springframework.data.domain.Page;
-import org.springframework.data.domain.PageImpl;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Repository;
 
 import com.querydsl.core.types.dsl.BooleanExpression;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 
+import codezap.global.pagination.FixedPage;
+import codezap.global.pagination.FixedPageCounter;
+import codezap.likes.domain.QLikes;
+import codezap.template.domain.QTemplate;
 import codezap.template.domain.Template;
 import codezap.template.domain.Visibility;
 import lombok.RequiredArgsConstructor;
@@ -23,8 +22,9 @@ public class TemplateQueryDSLRepository {
 
     private final JPAQueryFactory queryFactory;
     private final TemplateSearchExpressionProvider expressionProvider;
+    private final FixedPageCounter fixedPageCounter;
 
-    public Page<Template> findTemplates(
+    public FixedPage<Template> findTemplates(
             Long memberId,
             String keyword,
             Long categoryId,
@@ -33,8 +33,8 @@ public Page<Template> findTemplates(
             Pageable pageable
     ) {
         List<Template> content = getTemplates(memberId, keyword, categoryId, tagIds, visibility, pageable);
-        long count = count(memberId, keyword, categoryId, tagIds, visibility);
-        return new PageImpl<>(content, pageable, count);
+        int nextFixedPage = countMaxPageOfTemplates(memberId, keyword, categoryId, tagIds, visibility, pageable);
+        return new FixedPage<>(content, nextFixedPage);
     }
 
     private List<Template> getTemplates(
@@ -45,29 +45,30 @@ private List<Template> getTemplates(
             Visibility visibility,
             Pageable pageable
     ) {
-        return queryFactory
-                .selectFrom(template)
-                .leftJoin(template.category).fetchJoin()
-                .leftJoin(template.member).fetchJoin()
+        return queryFactory.selectFrom(QTemplate.template)
+                .leftJoin(QTemplate.template.category).fetchJoin()
+                .leftJoin(QTemplate.template.member).fetchJoin()
                 .where(matchesKeyword(memberId, keyword, categoryId, tagIds, visibility))
                 .orderBy(TemplateOrderSpecifierUtils.getOrderSpecifier(pageable.getSort()))
                 .offset(pageable.getOffset())
                 .limit(pageable.getPageSize())
                 .fetch();
     }
 
-    private long count(
+    private int countMaxPageOfTemplates(
             Long memberId,
             String keyword,
             Long categoryId,
             List<Long> tagIds,
-            Visibility visibility
+            Visibility visibility,
+            Pageable pageable
     ) {
-        return Objects.requireNonNull(queryFactory
-                .select(template.count())
-                .from(template)
-                .where(matchesKeyword(memberId, keyword, categoryId, tagIds, visibility))
-                .fetchOne());
+        return fixedPageCounter.countNextFixedPage(
+                queryFactory,
+                QTemplate.template,
+                pageable,
+                matchesKeyword(memberId, keyword, categoryId, tagIds, visibility)
+        );
     }
 
     private BooleanExpression[] matchesKeyword(
@@ -85,5 +86,34 @@ private BooleanExpression[] matchesKeyword(
                 expressionProvider.matchesKeyword(keyword)
         };
     }
+
+    public FixedPage<Template> findAllLikedByMemberId(Long memberId, Pageable pageable) {
+        List<Template> content = queryFactory.select(QLikes.likes.template)
+                .from(QLikes.likes)
+                .where(isLikedTemplateByMember(memberId))
+                .orderBy(TemplateOrderSpecifierUtils.getOrderSpecifier(pageable.getSort()))
+                .offset(pageable.getOffset())
+                .limit(pageable.getPageSize())
+                .fetch();
+
+        return new FixedPage<>(content, countMaxPageOfLikeTemplates(memberId, pageable));
+    }
+
+    private int countMaxPageOfLikeTemplates(Long memberId, Pageable pageable) {
+        return fixedPageCounter.countNextFixedPage(
+                queryFactory,
+                QLikes.likes,
+                pageable,
+                isLikedTemplateByMember(memberId)
+        );
+    }
+
+    private static BooleanExpression isLikedTemplateByMember(Long memberId) {
+        BooleanExpression isLikedByMemberId = QLikes.likes.member.id.eq(memberId);
+        BooleanExpression isLikedTemplateByMemberId = QLikes.likes.template.member.id.eq(memberId);
+        BooleanExpression isTemplatePublic = QLikes.likes.template.visibility.eq(Visibility.PUBLIC);
+
+        return isLikedByMemberId.and(isLikedTemplateByMemberId.or(isTemplatePublic));
+    }
 }
 

backend/src/main/java/codezap/template/repository/TemplateRepository.java

@@ -2,12 +2,12 @@
 
 import java.util.List;
 
-import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Repository;
 
 import codezap.global.exception.CodeZapException;
 import codezap.global.exception.ErrorCode;
+import codezap.global.pagination.FixedPage;
 import codezap.template.domain.Template;
 import codezap.template.domain.Visibility;
 import lombok.RequiredArgsConstructor;
@@ -28,12 +28,16 @@ public List<Template> findByMemberId(Long id) {
         return templateJpaRepository.findByMemberId(id);
     }
 
-    public Page<Template> findAll(
+    public FixedPage<Template> findAll(
             Long memberId, String keyword, Long categoryId, List<Long> tagIds, Visibility visibility, Pageable pageable
     ) {
         return templateQueryDSLRepository.findTemplates(memberId, keyword, categoryId, tagIds, visibility, pageable);
     }
 
+    public FixedPage<Template> findAllLikedByMemberId(Long memberId, Pageable pageable) {
+        return templateQueryDSLRepository.findAllLikedByMemberId(memberId, pageable);
+    }
+
     public boolean existsByCategoryId(Long categoryId) {
         return templateJpaRepository.existsByCategoryId(categoryId);
     }

backend/src/main/java/codezap/template/service/TemplateService.java

@@ -3,14 +3,14 @@
 import java.util.HashSet;
 import java.util.List;
 
-import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import codezap.category.domain.Category;
 import codezap.global.exception.CodeZapException;
 import codezap.global.exception.ErrorCode;
+import codezap.global.pagination.FixedPage;
 import codezap.member.domain.Member;
 import codezap.template.domain.Template;
 import codezap.template.domain.Visibility;
@@ -45,7 +45,7 @@ public List<Template> getByMemberId(Long memberId) {
         return templateRepository.findByMemberId(memberId);
     }
 
-    public Page<Template> findAllBy(
+    public FixedPage<Template> findAllBy(
             Long memberId,
             String keyword,
             Long categoryId,
@@ -56,6 +56,10 @@ public Page<Template> findAllBy(
         return templateRepository.findAll(memberId, keyword, categoryId, tagIds, visibility, pageable);
     }
 
+    public FixedPage<Template> findAllByMemberId(Long memberId, Pageable pageable) {
+        return templateRepository.findAllLikedByMemberId(memberId, pageable);
+    }
+
     @Transactional
     public Template update(
             Member member,

backend/src/main/java/codezap/template/service/facade/TemplateApplicationService.java

@@ -4,7 +4,6 @@
 
 import jakarta.annotation.Nullable;
 
-import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -13,10 +12,10 @@
 import codezap.category.service.CategoryService;
 import codezap.global.exception.CodeZapException;
 import codezap.global.exception.ErrorCode;
+import codezap.global.pagination.FixedPage;
 import codezap.likes.service.LikedChecker;
 import codezap.likes.service.LikesService;
 import codezap.member.domain.Member;
-import codezap.member.service.MemberService;
 import codezap.tag.domain.Tag;
 import codezap.tag.service.TagService;
 import codezap.template.domain.SourceCode;
@@ -45,7 +44,6 @@ public class TemplateApplicationService {
     private final TagService tagService;
     private final ThumbnailService thumbnailService;
     private final LikesService likesService;
-    private final MemberService memberService;
 
     @Transactional
     public Long create(Member member, CreateTemplateRequest createTemplateRequest) {
@@ -94,7 +92,7 @@ public FindAllTemplatesResponse findAllBy(
             List<Long> tagIds,
             Pageable pageable
     ) {
-        Page<Template> templates = templateService.findAllBy(
+        FixedPage<Template> templates = templateService.findAllBy(
                 memberId, keyword, categoryId, tagIds, Visibility.PUBLIC, pageable
         );
         return makeAllTemplatesResponse(templates, (template) -> false);
@@ -108,7 +106,7 @@ public FindAllTemplatesResponse findAllBy(
             Pageable pageable,
             Member loginMember
     ) {
-        Page<Template> templates = templateService.findAllBy(
+        FixedPage<Template> templates = templateService.findAllBy(
                 memberId, keyword, categoryId, tagIds, getVisibilityLevel(memberId, loginMember), pageable
         );
         return makeAllTemplatesResponse(templates, (template -> likesService.isLiked(loginMember, template)));
@@ -123,18 +121,17 @@ private Visibility getVisibilityLevel(Long memberId, Member loginMember) {
     }
 
     public FindAllTemplatesResponse findAllByLiked(Long memberId, Pageable pageable) {
-        Page<Template> likeTemplate = likesService.findAllByMemberId(memberId, pageable);
+        FixedPage<Template> likeTemplate = templateService.findAllByMemberId(memberId, pageable);
         return makeAllTemplatesResponse(likeTemplate, (template -> true));
     }
 
-    private FindAllTemplatesResponse makeAllTemplatesResponse(Page<Template> page, LikedChecker likedChecker) {
-        List<Template> templates = page.getContent();
+    private FindAllTemplatesResponse makeAllTemplatesResponse(FixedPage<Template> page, LikedChecker likedChecker) {
+        List<Template> templates = page.contents();
         List<FindAllTemplateItemResponse> findAllTemplateByResponse =
                 getFindAllTemplateItemResponses(templates, likedChecker);
 
         return new FindAllTemplatesResponse(
-                page.getTotalPages(),
-                page.getTotalElements(),
+                page.nextPages(),
                 findAllTemplateByResponse);
     }