feat: 게시물 전체 개수 조회 API (#41)

src/main/java/project/backend/business/post/PostService.java

@@ -17,6 +17,7 @@
 import project.backend.business.post.request.PostListServiceRequest;
 import project.backend.business.post.request.UpdatePostServiceRequest;
 import project.backend.business.post.response.CreateUpdatePostResponse;
+import project.backend.business.post.response.PostCountResponse;
 import project.backend.business.post.response.PostDetailResponse;
 import project.backend.business.post.response.PostListResponse;
 import project.backend.business.post.response.dto.PostDetailDto;
@@ -58,6 +59,12 @@ public PostListResponse getPosts(Long userId, PostListServiceRequest postListSer
     return PostListResponse.from(postListDtos);
   }
 
+  @Transactional(readOnly = true)
+  public PostCountResponse getTotalPostCount(Long userId) {
+    int count = postReader.readActivatePostCountByUserId(userId);
+    return PostCountResponse.from(count);
+  }
+
   @Transactional(readOnly = true)
   public PostDetailResponse getPostDetail(Long userId,
       PostDetailServiceRequest postDetailServiceRequest) {

src/main/java/project/backend/business/post/implement/PostReader.java

@@ -85,4 +85,8 @@ public PostDetailDto readPostDetailWithTags(Long userId,
                                 "yy.MM.dd"))
                         .build();
   }
+
+  public int readActivatePostCountByUserId(Long userId) {
+    return postRepository.countPostsByUserIdAndStatusAndActivatedTrue(userId, PostStatus.PUBLISHED);
+  }
 }

src/main/java/project/backend/business/post/response/PostCountResponse.java

@@ -0,0 +1,18 @@
+package project.backend.business.post.response;
+
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+public class PostCountResponse {
+
+  private final int totalCount;
+
+  public static PostCountResponse from(int count) {
+    return PostCountResponse.builder()
+                            .totalCount(count)
+                            .build();
+  }
+
+}

src/main/java/project/backend/presentation/post/PostController.java

@@ -18,6 +18,7 @@
 import project.backend.business.post.request.PostDetailServiceRequest;
 import project.backend.business.post.request.PostListServiceRequest;
 import project.backend.business.post.response.CreateUpdatePostResponse;
+import project.backend.business.post.response.PostCountResponse;
 import project.backend.business.post.response.PostDetailResponse;
 import project.backend.business.post.response.PostListResponse;
 import project.backend.presentation.post.docs.PostControllerDocs;
@@ -35,6 +36,13 @@ public class PostController implements PostControllerDocs {
 
   private final PostService postService;
 
+  @AssignCurrentUserInfo
+  @GetMapping("/count")
+  public ResponseEntity<PostCountResponse> getPostCount(CurrentUserInfo userInfo) {
+    PostCountResponse response = postService.getTotalPostCount(userInfo.getUserId());
+    return new ResponseEntity<>(response, HttpStatus.OK);
+  }
+
   @AssignCurrentUserInfo
   @GetMapping
   public ResponseEntity<PostListResponse> getPosts(CurrentUserInfo userInfo,

src/main/java/project/backend/presentation/post/docs/PostControllerDocs.java

@@ -6,6 +6,7 @@
 import io.swagger.v3.oas.annotations.tags.Tag;
 import org.springframework.http.ResponseEntity;
 import project.backend.business.post.response.CreateUpdatePostResponse;
+import project.backend.business.post.response.PostCountResponse;
 import project.backend.business.post.response.PostDetailResponse;
 import project.backend.business.post.response.PostListResponse;
 import project.backend.entity.post.PostStatus;
@@ -16,7 +17,7 @@
 @Tag(name = "게시글 API")
 public interface PostControllerDocs {
 
-  @Operation(summary = "게시글 목록 조회 API", description = "로그인한 유저가 작성한 게시글을 최근 작성한 순서대로 조회합니다.")
+  @Operation(summary = "게시글 목록 조회 API", description = "로그인한 유저의 게시글을 최근 작성한 순서대로 조회.")
   @Parameter(name = "userInfo", hidden = true)
   @Parameter(name = "page", description = "조회할 페이지 번호. 시작 = 0")
   @Parameter(name = "archiveId", description = "조회할 아카이브 번호.")
@@ -27,6 +28,10 @@ ResponseEntity<PostListResponse> getPosts(
       Long archiveId,
       String search);
 
+  @Operation(summary = "게시글 개수 조회 API", description = "로그인한 유저가 작성한 게시글의 총 개수 조회.")
+  @Parameter(name = "userInfo", hidden = true)
+  ResponseEntity<PostCountResponse> getPostCount(CurrentUserInfo userInfo);
+
   @Operation(summary = "요약 요청 API", description = "요약 옵션을 통해 웹사이트 요약.")
   @Parameter(name = "userInfo", hidden = true)
   ResponseEntity<CreateUpdatePostResponse> createPost(

src/main/java/project/backend/repository/post/PostRepository.java

@@ -10,6 +10,8 @@
 @Repository
 public interface PostRepository extends JpaRepository<Post, Long>, JpaSpecificationExecutor {
 
+  int countPostsByUserIdAndStatusAndActivatedTrue(Long userId, PostStatus status);
+
   Optional<Post> findPostAndUserAndActivatedTrueById(Long postId);
 
   Optional<Post> findByIdAndUserIdAndActivatedTrue(Long postId, Long userId);