[feat] 내활동: 내가 쓴 글 목록에서 클릭시 해당 게시글로 이동 구현 #86

src/main/java/com/back/domain/myhistory/controller/MyHistoryController.java

@@ -33,6 +33,15 @@ public RsData<MyHistoryPostListDto> getMyPosts(
         MyHistoryPostListDto body = myHistoryService.getMyPosts(userId, lastCreatedAt, lastId, limit);
         return RsData.successOf(body);
     }
+
+    @GetMapping("/posts/{id}")
+    public RsData<com.back.domain.myhistory.dto.MyHistoryPostGoResponseDto> goFromPost(
+            @AuthenticationPrincipal(expression = "id") Long userId,
+            @PathVariable("id") Long postId
+    ) {
+        var body = myHistoryService.getPostLinkFromMyPost(userId, postId);
+        return RsData.successOf(body);
+    }
 
     @GetMapping("/comments")
     public RsData<MyHistoryCommentListDto> getMyComments(

src/main/java/com/back/domain/myhistory/dto/MyHistoryPostGoResponseDto.java

@@ -0,0 +1,12 @@
+package com.back.domain.myhistory.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class MyHistoryPostGoResponseDto {
+    private Long postId;
+    private String postApiUrl;
+}
+

src/main/java/com/back/domain/myhistory/repository/MyHistoryPostRepository.java

@@ -36,4 +36,10 @@ List<Post> findMyPostsAfter(@Param("userId") Long userId,
                                 @Param("lastCreatedAt") LocalDateTime lastCreatedAt,
                                 @Param("lastId") Long lastId,
                                 Pageable pageable);
+
+    @Query("""
+        select p from Post p
+         where p.id = :id and p.user.id = :userId
+    """)
+    Post findByIdAndUserId(@Param("id") Long id, @Param("userId") Long userId);
 }

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

@@ -95,4 +95,17 @@ public MyHistoryCommentGoResponseDto getPostLinkFromMyComment(Long userId, Long
         String apiUrl = "/api/posts/" + postId;
         return new MyHistoryCommentGoResponseDto(postId, apiUrl);
     }
+
+    @Transactional(readOnly = true)
+    public MyHistoryPostGoResponseDto getPostLinkFromMyPost(Long userId, Long postId) {
+        Post p = myHistoryPostRepository.findByIdAndUserId(postId, userId);
+        if (p == null) {
+            throw new ServiceException(404, "게시글을 찾을 수 없습니다.");
+        }
+        if (p.getStatus() == PostStatus.DELETED) {
+            throw new ServiceException(410, "삭제된 게시글입니다.");
+        }
+        String apiUrl = "/api/posts/" + p.getId();
+        return new MyHistoryPostGoResponseDto(p.getId(), apiUrl);
+    }
 }