[feat] 게시글 수정 구현#45

src/main/java/com/back/domain/post/post/controller/PostController.java

@@ -1,13 +1,15 @@
 package com.back.domain.post.post.controller;
 
-import com.back.domain.post.post.dto.request.PostRequestDto;
+import com.back.domain.post.post.dto.request.PostCreateRequestDto;
+import com.back.domain.post.post.dto.request.PostUpdateRequestDto;
 import com.back.domain.post.post.dto.response.PostResponseDto;
-import com.back.domain.post.post.entity.Post;
 import com.back.domain.post.post.service.PostService;
 import com.back.global.rsData.RsData;
+import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -23,14 +25,14 @@ public class PostController {
 
   /**
    * 게시글 작성 API
-   * @param postRequestDto 게시글 작성 요청 DTO
+   * @param reqBody 게시글 작성 요청 DTO
    * @return 작성된 게시글 정보
    */
   @PostMapping
   public RsData<PostResponseDto> createPost(
-      @RequestBody PostRequestDto postRequestDto
+      @Valid @RequestBody PostCreateRequestDto reqBody
   ) {
-    return RsData.successOf(postService.createPost(postRequestDto)); // code=200, message="success"
+    return RsData.successOf(postService.createPost(reqBody)); // code=200, message="success"
   }
 
   /**
@@ -53,4 +55,18 @@ public RsData<PostResponseDto> getPost(
   ) {
     return RsData.successOf(postService.getPost(postId)); // code=200, message="success"
   }
+
+  /**
+   * 게시글 수정 API
+   * @param postId 수정할 게시글 ID
+   * @param reqBody 게시글 수정 요청 DTO
+   * @return 수정된 게시글 정보
+   */
+  @PatchMapping("/{postId}")
+  public RsData<PostResponseDto> updatePost(
+      @PathVariable Long postId,
+      @Valid @RequestBody PostUpdateRequestDto reqBody
+  ) {
+    return RsData.successOf(postService.updatePost(postId, reqBody)); // code=200, message="success"
+  }
 }

src/main/java/com/back/domain/post/post/dto/request/PostCreateRequestDto.java

@@ -0,0 +1,17 @@
+package com.back.domain.post.post.dto.request;
+
+import com.back.domain.post.post.enums.PostStatus;
+import jakarta.validation.constraints.NotBlank;
+import java.util.List;
+
+public record PostCreateRequestDto(
+    Long categoryId,
+    PostStatus status,
+    @NotBlank (message = "제목은 필수입니다.")
+    String title,
+    @NotBlank (message = "내용은 필수입니다.")
+    String content,
+    String imageUrl,
+    List<String> tags
+) {
+}

src/main/java/com/back/domain/post/post/dto/request/PostRequestDto.java → src/main/java/com/back/domain/post/post/dto/request/PostUpdateRequestDto.java

@@ -1,12 +1,13 @@
 package com.back.domain.post.post.dto.request;
 
+import com.back.domain.post.post.enums.PostStatus;
 import java.util.List;
 
-public record PostRequestDto(
+public record PostUpdateRequestDto(
     Long categoryId,
+    PostStatus status,
     String title,
     String content,
-    String userNickName,
     String imageUrl,
     List<String> tags
 ) {

src/main/java/com/back/domain/post/post/entity/Post.java

@@ -31,7 +31,6 @@
 
 @Entity
 @Getter
-@Setter
 @Table(name = "post")
 @EntityListeners(AuditingEntityListener.class)
 @NoArgsConstructor(access = lombok.AccessLevel.PROTECTED)
@@ -97,8 +96,32 @@ public class Post {
   @Column(name = "view_count")
   private Integer viewCount;
 
+  public void updateCategory(Category category) {
+    this.category = category;
+  }
+
+  public void updateStatus(PostStatus status) {
+    this.status = status;
+  }
+
+  public void updateTitle(String title) {
+    this.title = title;
+  }
+
+  public void updateContent(String content) {
+    this.content = content;
+  }
+
+  public void updateImage(String imageUrl) {
+    this.imageUrl = imageUrl;
+  }
+
   public void addTag(Tag tag) {
     PostTag postTag = PostTag.create(this, tag);
     this.postTags.add(postTag);
   }
+
+  public void clearTags() {
+    this.postTags.clear();
+  }
 }

src/main/java/com/back/domain/post/post/service/PostService.java

@@ -2,7 +2,8 @@
 
 import com.back.domain.post.category.entity.Category;
 import com.back.domain.post.category.repository.CategoryRepository;
-import com.back.domain.post.post.dto.request.PostRequestDto;
+import com.back.domain.post.post.dto.request.PostCreateRequestDto;
+import com.back.domain.post.post.dto.request.PostUpdateRequestDto;
 import com.back.domain.post.post.dto.response.PostResponseDto;
 import com.back.domain.post.post.entity.Post;
 import com.back.domain.post.post.entity.Tag;
@@ -28,34 +29,23 @@ public class PostService {
 
   // 게시글 작성 로직
   @Transactional
-  public PostResponseDto createPost(PostRequestDto postRequestDto) {
+  public PostResponseDto createPost(PostCreateRequestDto reqBody) {
     User user = rq.getActor(); // 현재 로그인한 사용자의 정보 가져오기
 
-    Category category = categoryRepository.findById(postRequestDto.categoryId())
-        .orElseThrow(() -> new IllegalArgumentException("해당 카테고리를 찾을 수 없습니다. ID: " + postRequestDto.categoryId()));
+    Category category = categoryRepository.findById(reqBody.categoryId())
+        .orElseThrow(() -> new IllegalArgumentException("해당 카테고리를 찾을 수 없습니다. ID: " + reqBody.categoryId()));
 
     Post post = Post.builder()
         .category(category)
         .user(user)
-        .title(postRequestDto.title())
-        .content(postRequestDto.content())
-        .imageUrl(postRequestDto.imageUrl())
+        .title(reqBody.title())
+        .content(reqBody.content())
+        .imageUrl(reqBody.imageUrl())
         .build();
 
-    List<String> tagNames = postRequestDto.tags();
+    List<String> tagNames = reqBody.tags();
     if (tagNames != null && !tagNames.isEmpty()) {
-      for (String tagName : tagNames) {
-        // 태그 이름으로 Tag 엔티티를 조회하거나, 없으면 새로 생성하여 저장
-        Tag tag = tagRepository.findByName(tagName)
-            .orElseGet(() -> tagRepository.save(
-                    Tag.builder()
-                        .name(tagName)
-                        .build()
-                )
-            );
-
-        post.addTag(tag);
-      }
+      addTag(tagNames, post);
     }
 
     return new PostResponseDto(postRepository.save(post));
@@ -79,4 +69,55 @@ public PostResponseDto getPost(Long postId) {
             .orElseThrow(() -> new NoSuchElementException("해당 게시글을 찾을 수 없습니다. ID: " + postId))
     );
   }
+
+  // 게시글 수정 로직
+  @Transactional
+  public PostResponseDto updatePost(Long postId, PostUpdateRequestDto reqBody) {
+    Post post = postRepository.findById(postId)
+        .orElseThrow(() -> new NoSuchElementException("해당 게시글을 찾을 수 없습니다. ID: " + postId));
+
+    if (reqBody.categoryId() != null) {
+      Category category = categoryRepository.findById(reqBody.categoryId())
+          .orElseThrow(() -> new IllegalArgumentException(
+              "해당 카테고리를 찾을 수 없습니다. ID: " + reqBody.categoryId()
+              )
+          );
+      post.updateCategory(category);
+    }
+    if (reqBody.status() != null) {
+      post.updateStatus(reqBody.status());
+    }
+    if (reqBody.title() != null && !reqBody.title().isBlank()){
+      post.updateTitle(reqBody.title());
+    }
+    if (reqBody.content() != null && !reqBody.content().isBlank()) {
+      post.updateContent(reqBody.content());
+    }
+    if (reqBody.imageUrl() != null && !reqBody.imageUrl().isBlank()) {
+      post.updateImage(reqBody.imageUrl());
+    }
+    if (reqBody.tags() != null) {
+      // 기존 태그들 삭제
+      post.clearTags();
+
+      // 새로운 태그들 추가
+      addTag(reqBody.tags(), post);
+    }
+
+    return new PostResponseDto(post);
+  }
+
+  // 태그 추가 메서드
+  private void addTag(List<String> tagNames, Post post) {
+    for (String tagName : tagNames) {
+      Tag tag = tagRepository.findByName(tagName)
+          .orElseGet(() -> tagRepository.save(
+              Tag.builder()
+                  .name(tagName)
+                  .build()
+              )
+          );
+      post.addTag(tag);
+    }
+  }
 }