[FEAT] 내가 좋아요한 글 보기

src/main/java/com/example/FixLog/controller/MypagePostController.java

@@ -33,4 +33,18 @@ public ResponseEntity<Response<PageResponseDto<MyPostPageResponseDto>>> getMyPos
         return ResponseEntity.ok(Response.success("내가 작성한 글 보기 성공", data));
     }
 
+    // 내가 좋아요한 글
+    @GetMapping("/likes")
+    public ResponseEntity<Response<PageResponseDto<MyPostPageResponseDto>>> getLikedPosts(
+            @AuthenticationPrincipal UserDetails userDetails,
+            @RequestParam(defaultValue = "0") int page,
+            @RequestParam(defaultValue = "4") int size,
+            @RequestParam(defaultValue = "0") int sort) {
+
+        String email = userDetails.getUsername();
+        PageResponseDto<MyPostPageResponseDto> result = mypagePostService.getLikedPosts(email, page, sort, size);
+        return ResponseEntity.ok(Response.success("내가 좋아요한 글 보기 성공", result));
+    }
+
+
 }

src/main/java/com/example/FixLog/repository/like/PostLikeRepository.java

@@ -3,10 +3,13 @@
 import com.example.FixLog.domain.like.PostLike;
 import com.example.FixLog.domain.member.Member;
 import com.example.FixLog.domain.post.Post;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 import java.util.Optional;
 
 public interface PostLikeRepository extends JpaRepository<PostLike, Long> {
     Optional<PostLike> findByUserIdAndPostId(Member userId, Post postId);
+    Page<PostLike> findByUserId(Member user, Pageable pageable);
 }

src/main/java/com/example/FixLog/repository/post/PostRepository.java

@@ -16,5 +16,5 @@ public interface PostRepository extends JpaRepository<Post, Long> {
     Page<Post> findAllByOrderByPostLikesDesc(Pageable pageable);
 
     @EntityGraph(attributePaths = {"postLikes"})
-    Page<Post> findByUserId(Member userId, Pageable pageable);
+    Page<Post> findByUserId(Member userId, Pageable pageable); // 좋아요수 때문
 }

src/main/java/com/example/FixLog/service/MypagePostService.java

@@ -1,5 +1,6 @@
 package com.example.FixLog.service;
 
+import com.example.FixLog.domain.like.PostLike;
 import com.example.FixLog.domain.member.Member;
 import com.example.FixLog.domain.post.Post;
 import com.example.FixLog.dto.PageResponseDto;
@@ -8,6 +9,7 @@
 import com.example.FixLog.exception.ErrorCode;
 import com.example.FixLog.repository.MemberRepository;
 import com.example.FixLog.repository.fork.ForkRepository;
+import com.example.FixLog.repository.like.PostLikeRepository;
 import com.example.FixLog.repository.post.PostRepository;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
@@ -25,17 +27,19 @@ public class MypagePostService {
     private final PostRepository postRepository;
     private final MemberRepository memberRepository;
     private final ForkRepository forkRepository;
+    private final PostLikeRepository postLikeRepository;
 
-    public MypagePostService(PostRepository postRepository, MemberRepository memberRepository, ForkRepository forkRepository) {
+    public MypagePostService(PostRepository postRepository, MemberRepository memberRepository, ForkRepository forkRepository, PostLikeRepository postLikeRepository) {
         this.postRepository = postRepository;
         this.memberRepository = memberRepository;
         this.forkRepository = forkRepository;
+        this.postLikeRepository = postLikeRepository;
     }
 
     // 내가 쓴 글 보기
     public PageResponseDto<MyPostPageResponseDto> getMyPosts(String email, int page, int sort, int size) {
         Member member = memberRepository.findByEmail(email)
-                .orElseThrow(() -> new CustomException(ErrorCode.MEMBER_NOT_FOUND));
+                .orElseThrow(() -> new CustomException(ErrorCode.USER_EMAIL_NOT_FOUND));
 
         // 1: 오래된순, 0: 최신순
         Sort.Direction direction = (sort == 1) ? Sort.Direction.ASC : Sort.Direction.DESC;
@@ -57,4 +61,31 @@ public PageResponseDto<MyPostPageResponseDto> getMyPosts(String email, int page,
                 )
         );
     }
+
+    // 내가 좋아요한 글 보기
+    public PageResponseDto<MyPostPageResponseDto> getLikedPosts(String email, int page, int sort, int size) {
+        Member member = memberRepository.findByEmail(email)
+                .orElseThrow(() -> new CustomException(ErrorCode.USER_EMAIL_NOT_FOUND));
+
+        // 1: 오래된순, 0: 최신순
+        Sort.Direction direction = (sort == 1) ? Sort.Direction.ASC : Sort.Direction.DESC;
+        Pageable pageable = PageRequest.of(page, size, Sort.by(direction, "postId.createdAt"));
+
+        Page<PostLike> postLikePage = postLikeRepository.findByUserId(member, pageable);
+        List<Post> likedPosts = postLikePage.map(PostLike::getPostId).getContent();
+
+        // fork count 한번에 조회
+        List<Object[]> forkCounts = forkRepository.countForksByOriginalPosts(likedPosts);
+        Map<Long, Integer> forkCountMap = forkCounts.stream()
+                .collect(Collectors.toMap(
+                        row -> (Long) row[0],
+                        row -> ((Long) row[1]).intValue()
+                ));
+
+        return PageResponseDto.from(postLikePage.map(PostLike::getPostId), post ->
+                MyPostPageResponseDto.from(post, forkCountMap.getOrDefault(post.getPostId(), 0))
+        );
+    }
+
+
 }