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[feat] 내가 추천한 게시글 목록 조회 기능 구현 #104 (#115)
* feat: 내가 '좋아요'한 게시글 목록을 위한 DTO 추가 * feat: 내가 '좋아요'한 게시글 목록 DTO 추가 * feat: 마이페이지 '좋아요' 게시글 리포지토리 추가 - 사용자가 '좋아요'한 게시글 목록을 조회하기 위한 리포지토리 구현 - `findMyLikedPostsFirstPage`: 첫 페이지 조회 쿼리 추가 - `findMyLikedPostsAfter`: 무한 스크롤을 위한 다음 페이지 조회 쿼리 추가 - '좋아요' 상태가 활성화되고 게시글이 삭제되지 않은 항목만 조회하도록 필터링 * feat: 마이페이지 '좋아요' 게시글 기능 추가 - 사용자가 '좋아요'를 누른 게시글 목록을 조회하는 `getMyLikedPosts` 메서드 추가 - 무한 스크롤(pagination)을 지원하기 위해 `lastCreatedAt` 및 `lastId` 파라미터 활용 - `MyHistoryLikedPostRepository`를 사용하여 데이터베이스에서 '좋아요' 기록을 조회 - `PostLike` 엔티티를 `MyHistoryLikedPostItemDto`로 변환하여 반환 - '좋아요' 기록이 없는 경우나 다음 페이지가 없는 경우를 처리하는 로직 포함 * feat: 마이페이지 '좋아요' 게시글 API 추가 * feat: '좋아요' 게시글 리포지토리 쿼리 추가 - 특정 게시글에 대한 사용자의 '좋아요' 기록을 찾는 `findByPostIdAndUserIdLike` 쿼리 추가 - 게시글 ID와 사용자 ID를 기준으로 '좋아요' 상태의 `PostLike` 엔티티를 조회 * feat: 내가 '좋아요'한 게시글 링크 기능 추가 - 사용자가 '좋아요'를 누른 게시글의 링크를 반환하는 `getPostLinkFromMyLikedPost` 메서드 추가 - `MyHistoryLikedPostRepository`를 사용하여 특정 게시글에 대한 사용자의 '좋아요' 기록을 조회 - '좋아요' 기록이 없거나 게시글이 삭제된 경우 예외 처리 * feat: 마이페이지 '좋아요' 게시글 링크 기능 API 추가
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‎src/main/java/com/back/domain/myhistory/controller/MyHistoryController.java‎

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import com.back.domain.myhistory.dto.MyHistoryCommentGoResponseDto;
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import com.back.domain.myhistory.dto.MyHistoryCommentListDto;
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import com.back.domain.myhistory.dto.MyHistoryPostListDto;
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import com.back.domain.myhistory.dto.MyHistoryLikedPostListDto;
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import com.back.domain.myhistory.service.MyHistoryService;
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import com.back.global.rsData.RsData;
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import jakarta.validation.constraints.Max;
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return RsData.successOf(body);
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}
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@GetMapping("/likes")
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public RsData<MyHistoryLikedPostListDto> getMyLikedPosts(
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@AuthenticationPrincipal(expression = "id") Long userId,
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@RequestParam(required = false) @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime lastCreatedAt,
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@RequestParam(required = false) Long lastId,
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@RequestParam(defaultValue = "20") @Min(1) @Max(100) int limit
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) {
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MyHistoryLikedPostListDto body = myHistoryService.getMyLikedPosts(userId, lastCreatedAt, lastId, limit);
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return RsData.successOf(body);
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}
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@GetMapping("/comments/{id}")
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public RsData<MyHistoryCommentGoResponseDto> goFromComment(
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@AuthenticationPrincipal(expression = "id") Long userId,
@@ -62,5 +74,14 @@ public RsData<MyHistoryCommentGoResponseDto> goFromComment(
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var body = myHistoryService.getPostLinkFromMyComment(userId, commentId);
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return RsData.successOf(body);
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}
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@GetMapping("/likes/{id}")
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public RsData<com.back.domain.myhistory.dto.MyHistoryPostGoResponseDto> goFromLikedPost(
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@AuthenticationPrincipal(expression = "id") Long userId,
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@PathVariable("id") Long postId
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) {
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var body = myHistoryService.getPostLinkFromMyLikedPost(userId, postId);
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return RsData.successOf(body);
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}
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}
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‎src/main/java/com/back/domain/myhistory/dto/MyHistoryLikedPostItemDto.java‎

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package com.back.domain.myhistory.dto;
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import com.back.domain.post.post.entity.Post;
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import com.back.domain.post.post.entity.PostLike;
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import java.time.LocalDateTime;
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import lombok.Builder;
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import lombok.Getter;
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@Getter
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@Builder
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public class MyHistoryLikedPostItemDto {
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private Long id;
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private String title;
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private String imageUrl;
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private LocalDateTime likedAt;
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private Integer likeCount;
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private Integer commentCount;
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public static MyHistoryLikedPostItemDto from(PostLike pl) {
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Post p = pl.getPost();
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return MyHistoryLikedPostItemDto.builder()
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.id(p.getId())
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.title(p.getTitle())
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.imageUrl(p.getImageUrl())
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.likedAt(pl.getCreatedAt())
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.likeCount(p.getLikeCount())
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.commentCount(p.getCommentCount())
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.build();
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}
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}
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‎src/main/java/com/back/domain/myhistory/dto/MyHistoryLikedPostListDto.java‎

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package com.back.domain.myhistory.dto;
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import java.time.LocalDateTime;
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import java.util.List;
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import lombok.AllArgsConstructor;
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import lombok.Getter;
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@Getter
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@AllArgsConstructor
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public class MyHistoryLikedPostListDto {
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private List<MyHistoryLikedPostItemDto> items;
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private boolean hasNext;
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private LocalDateTime nextCreatedAt;
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private Long nextId;
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}
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‎src/main/java/com/back/domain/myhistory/repository/MyHistoryLikedPostRepository.java‎

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package com.back.domain.myhistory.repository;
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import com.back.domain.post.post.entity.PostLike;
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import com.back.domain.post.post.enums.PostLikeStatus;
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import com.back.domain.post.post.enums.PostStatus;
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import java.time.LocalDateTime;
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import java.util.List;
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import org.springframework.data.domain.Pageable;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.data.jpa.repository.Query;
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import org.springframework.data.repository.query.Param;
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import org.springframework.stereotype.Repository;
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@Repository
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public interface MyHistoryLikedPostRepository extends JpaRepository<PostLike, Long> {
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@Query("""
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select pl from PostLike pl
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join fetch pl.post p
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where pl.user.id = :userId
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and pl.status = :like
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and p.status <> :deleted
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order by pl.createdAt desc, pl.id desc
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""")
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List<PostLike> findMyLikedPostsFirstPage(@Param("userId") Long userId,
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@Param("like") PostLikeStatus like,
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@Param("deleted") PostStatus deleted,
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Pageable pageable);
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@Query("""
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select pl from PostLike pl
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join fetch pl.post p
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where pl.user.id = :userId
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and pl.status = :like
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and p.status <> :deleted
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and (pl.createdAt < :lastCreatedAt or (pl.createdAt = :lastCreatedAt and pl.id < :lastId))
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order by pl.createdAt desc, pl.id desc
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""")
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List<PostLike> findMyLikedPostsAfter(@Param("userId") Long userId,
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@Param("like") PostLikeStatus like,
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@Param("deleted") PostStatus deleted,
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@Param("lastCreatedAt") LocalDateTime lastCreatedAt,
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@Param("lastId") Long lastId,
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Pageable pageable);
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@Query("""
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select pl from PostLike pl
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join fetch pl.post p
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where p.id = :postId
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and pl.user.id = :userId
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and pl.status = :like
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""")
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PostLike findByPostIdAndUserIdLike(@Param("postId") Long postId,
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@Param("userId") Long userId,
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@Param("like") PostLikeStatus like);
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}

‎src/main/java/com/back/domain/myhistory/service/MyHistoryService.java‎

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import com.back.domain.myhistory.dto.*;
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import com.back.domain.myhistory.repository.MyHistoryCommentRepository;
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import com.back.domain.myhistory.repository.MyHistoryPostRepository;
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import com.back.domain.myhistory.repository.MyHistoryLikedPostRepository;
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import com.back.domain.post.comment.entity.Comment;
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import com.back.domain.post.post.entity.Post;
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import com.back.domain.post.post.enums.PostStatus;
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private final MyHistoryPostRepository myHistoryPostRepository;
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private final MyHistoryCommentRepository myHistoryCommentRepository;
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private final MyHistoryLikedPostRepository myHistoryLikedPostRepository;
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@Transactional(readOnly = true)
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public MyHistoryPostListDto getMyPosts(Long userId, LocalDateTime lastCreatedAt, Long lastId, int limit) {
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String apiUrl = "/api/posts/" + p.getId();
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return new MyHistoryPostGoResponseDto(p.getId(), apiUrl);
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}
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@Transactional(readOnly = true)
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public MyHistoryLikedPostListDto getMyLikedPosts(Long userId, LocalDateTime lastCreatedAt, Long lastId, int limit) {
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int safeLimit = Math.max(1, Math.min(limit, 100));
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int fetchSize = safeLimit + 1;
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List<com.back.domain.post.post.entity.PostLike> rows;
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if (lastCreatedAt == null || lastId == null) {
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rows = myHistoryLikedPostRepository.findMyLikedPostsFirstPage(
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userId,
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com.back.domain.post.post.enums.PostLikeStatus.LIKE,
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com.back.domain.post.post.enums.PostStatus.DELETED,
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PageRequest.of(0, fetchSize)
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);
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} else {
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rows = myHistoryLikedPostRepository.findMyLikedPostsAfter(
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userId,
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com.back.domain.post.post.enums.PostLikeStatus.LIKE,
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com.back.domain.post.post.enums.PostStatus.DELETED,
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lastCreatedAt,
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lastId,
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PageRequest.of(0, fetchSize)
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);
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}
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boolean hasNext = rows.size() > safeLimit;
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if (hasNext) rows = rows.subList(0, safeLimit);
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List<MyHistoryLikedPostItemDto> items = new ArrayList<>();
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for (com.back.domain.post.post.entity.PostLike postLike : rows) items.add(MyHistoryLikedPostItemDto.from(postLike));
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LocalDateTime nextCreatedAt = null;
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Long nextId = null;
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if (hasNext && !rows.isEmpty()) {
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com.back.domain.post.post.entity.PostLike last = rows.get(rows.size() - 1);
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nextCreatedAt = last.getCreatedAt();
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nextId = last.getId();
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}
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return new MyHistoryLikedPostListDto(items, hasNext, nextCreatedAt, nextId);
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}
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@Transactional(readOnly = true)
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public MyHistoryPostGoResponseDto getPostLinkFromMyLikedPost(Long userId, Long postId) {
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com.back.domain.post.post.entity.PostLike postLike = myHistoryLikedPostRepository.findByPostIdAndUserIdLike(
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postId,
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userId,
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com.back.domain.post.post.enums.PostLikeStatus.LIKE
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);
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if (postLike == null) {
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throw new ServiceException(404, "좋아요한 게시글을 찾을 수 없습니다.");
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}
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Post post = postLike.getPost();
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if (post.getStatus() == PostStatus.DELETED) {
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throw new ServiceException(410, "삭제된 게시글입니다.");
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}
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String apiUrl = "/api/posts/" + post.getId();
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return new MyHistoryPostGoResponseDto(post.getId(), apiUrl);
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}
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}

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