Merge pull request #32 from IT-Cotato/feat/21-post

[Feat] Post create, delete 기능 구현

src/main/java/com/cotato/kampus/domain/post/api/PostController.java

@@ -0,0 +1,62 @@
+package com.cotato.kampus.domain.post.api;
+
+import java.util.List;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+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.RequestMapping;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+import com.cotato.kampus.domain.post.application.PostService;
+import com.cotato.kampus.domain.post.dto.request.PostCreateRequest;
+import com.cotato.kampus.domain.post.dto.response.PostCreateResponse;
+import com.cotato.kampus.domain.post.dto.response.PostDeleteResponse;
+import com.cotato.kampus.global.common.dto.DataResponse;
+import com.cotato.kampus.global.error.exception.ImageException;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+
+@RestController
+@RequiredArgsConstructor(access = AccessLevel.PROTECTED)
+@RequestMapping("/v1/api/posts")
+public class PostController {
+
+	private final PostService postService;
+
+	@PostMapping("")
+	public ResponseEntity<DataResponse<PostCreateResponse>> createPost(
+		@RequestPart PostCreateRequest request,
+		@RequestPart(required = false) List<MultipartFile> images) throws ImageException {
+
+		return ResponseEntity.ok(DataResponse.from(
+			PostCreateResponse.of(
+				postService.createPost(
+				request.boardId(),
+				request.title(),
+				request.content(),
+				request.postCategory(),
+				images
+				)
+			)
+		));
+	}
+
+	@DeleteMapping("/{postId}")
+	public ResponseEntity<DataResponse<PostDeleteResponse>> deletePost(
+		@PathVariable Long postId
+	){
+		return ResponseEntity.ok(DataResponse.from(
+			PostDeleteResponse.of(
+				postService.deletePost(
+					postId
+				)
+			)
+		));
+	}
+}

src/main/java/com/cotato/kampus/domain/post/application/PostAppender.java

@@ -0,0 +1,41 @@
+package com.cotato.kampus.domain.post.application;
+
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.cotato.kampus.domain.common.application.ApiUserResolver;
+import com.cotato.kampus.domain.common.enums.Anonymity;
+import com.cotato.kampus.domain.post.PostStatus;
+import com.cotato.kampus.domain.post.dao.PostRepository;
+import com.cotato.kampus.domain.post.domain.Post;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+
+@Component
+@RequiredArgsConstructor(access = AccessLevel.PROTECTED)
+@Transactional(readOnly = true)
+public class PostAppender {
+
+	private final ApiUserResolver apiUserResolver;
+	private final PostRepository postRepository;
+
+	@Transactional
+	public Long append(Long boardId, String title, String content, String postCategory){
+		Long userId = apiUserResolver.getUserId();
+
+		Post post = Post.builder()
+			.userId(userId)
+			.boardId(boardId)
+			.title(title)
+			.content(content)
+			.likes(0L)
+			.scraps(0L)
+			.anonymity(Anonymity.ANONYMOUS)
+			.postStatus(PostStatus.PUBLISHED)
+			.postCategory(postCategory)
+			.build();
+
+		return postRepository.save(post).getId();
+	}
+}

src/main/java/com/cotato/kampus/domain/post/application/PostFinder.java

@@ -0,0 +1,24 @@
+package com.cotato.kampus.domain.post.application;
+
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.cotato.kampus.domain.post.dao.PostRepository;
+import com.cotato.kampus.domain.post.domain.Post;
+import com.cotato.kampus.global.error.ErrorCode;
+import com.cotato.kampus.global.error.exception.AppException;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+
+@Component
+@Transactional(readOnly = true)
+@RequiredArgsConstructor(access = AccessLevel.PROTECTED)
+public class PostFinder {
+	private final PostRepository postRepository;
+
+	public Post getById(Long postId){
+		return postRepository.findById(postId)
+			.orElseThrow(() -> new AppException(ErrorCode.POST_NOT_FOUND));
+	}
+}

src/main/java/com/cotato/kampus/domain/post/application/PostImageAppender.java

@@ -0,0 +1,32 @@
+package com.cotato.kampus.domain.post.application;
+
+import java.util.List;
+
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.cotato.kampus.domain.post.dao.PostPhotoRepository;
+import com.cotato.kampus.domain.post.domain.PostPhoto;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+
+@Component
+@Transactional(readOnly = true)
+@RequiredArgsConstructor(access = AccessLevel.PROTECTED)
+public class PostImageAppender {
+
+	private final PostPhotoRepository postPhotoRepository;
+
+	@Transactional
+	public void appendAll(Long postId, List<String> imageUrls){
+		List<PostPhoto> postPhotos = imageUrls.stream()
+			.map(imageUrl -> PostPhoto.builder()
+				.postId(postId)
+				.photoUrl(imageUrl)
+				.build())
+			.toList();
+
+		postPhotoRepository.saveAll(postPhotos);
+	}
+}

src/main/java/com/cotato/kampus/domain/post/application/PostService.java

@@ -0,0 +1,52 @@
+package com.cotato.kampus.domain.post.application;
+
+import java.util.List;
+
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import com.cotato.kampus.domain.product.application.PostDeleter;
+import com.cotato.kampus.global.error.exception.ImageException;
+import com.cotato.kampus.global.util.s3.S3Uploader;
+
+import jakarta.transaction.Transactional;
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor(access = lombok.AccessLevel.PROTECTED)
+public class PostService {
+
+	private final S3Uploader s3Uploader;
+	private final PostAppender postAppender;
+	private final PostDeleter postDeleter;
+	private final PostImageAppender postImageAppender;
+	private static final String PRODUCT_IMAGE_FOLDER = "post";
+
+	@Transactional
+	public Long createPost(
+		Long boardId,
+		String title,
+		String content,
+		String postCategory,
+		List<MultipartFile> images
+	) throws ImageException {
+		// s3에 이미지 업로드
+		List<String> imageUrls = (images == null || images.isEmpty()) ?
+			List.of() : s3Uploader.uploadFiles(images, PRODUCT_IMAGE_FOLDER);
+
+		// 게시글 추가
+		Long postId = postAppender.append(boardId, title, content, postCategory);
+
+		// 게시글 이미지 추가
+		postImageAppender.appendAll(postId, imageUrls);
+
+		return postId;
+	}
+
+	@Transactional
+	public Long deletePost(Long postId){
+		postDeleter.delete(postId);
+
+		return postId;
+	}
+}

src/main/java/com/cotato/kampus/domain/post/dao/PostPhotoRepository.java

@@ -0,0 +1,10 @@
+package com.cotato.kampus.domain.post.dao;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.cotato.kampus.domain.post.domain.PostPhoto;
+
+@Repository
+public interface PostPhotoRepository extends JpaRepository<PostPhoto, Long> {
+}

src/main/java/com/cotato/kampus/domain/post/dao/PostRepository.java

@@ -0,0 +1,10 @@
+package com.cotato.kampus.domain.post.dao;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.cotato.kampus.domain.post.domain.Post;
+
+@Repository
+public interface PostRepository extends JpaRepository<Post, Long> {
+}

src/main/java/com/cotato/kampus/domain/post/dto/request/PostCreateRequest.java

@@ -0,0 +1,9 @@
+package com.cotato.kampus.domain.post.dto.request;
+
+public record PostCreateRequest(
+	Long boardId,
+	String title,
+	String content,
+	String postCategory
+) {
+}

src/main/java/com/cotato/kampus/domain/post/dto/response/PostCreateResponse.java

@@ -0,0 +1,7 @@
+package com.cotato.kampus.domain.post.dto.response;
+
+public record PostCreateResponse(Long id) {
+	public static PostCreateResponse of(Long id){
+		return new PostCreateResponse(id);
+	}
+}

src/main/java/com/cotato/kampus/domain/post/dto/response/PostDeleteResponse.java

@@ -0,0 +1,7 @@
+package com.cotato.kampus.domain.post.dto.response;
+
+public record PostDeleteResponse(Long id) {
+	public static PostDeleteResponse of(Long id){
+		return new PostDeleteResponse(id);
+	}
+}

src/main/java/com/cotato/kampus/domain/product/application/PostDeleter.java

@@ -0,0 +1,35 @@
+package com.cotato.kampus.domain.product.application;
+
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.cotato.kampus.domain.common.application.ApiUserResolver;
+import com.cotato.kampus.domain.post.application.PostFinder;
+import com.cotato.kampus.domain.post.dao.PostRepository;
+import com.cotato.kampus.domain.post.domain.Post;
+import com.cotato.kampus.domain.user.domain.User;
+import com.cotato.kampus.global.error.ErrorCode;
+import com.cotato.kampus.global.error.exception.AppException;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+
+@Component
+@Transactional(readOnly = true)
+@RequiredArgsConstructor(access = AccessLevel.PROTECTED)
+public class PostDeleter {
+	private final ApiUserResolver apiUserResolver;
+	private final PostRepository postRepository;
+	private final PostFinder postFinder;
+
+	public void delete(Long postId){
+		User user = apiUserResolver.getUser();
+
+		Post post = postFinder.getById(postId);
+
+		if(post.getUserId() != user.getId()){
+			throw new AppException(ErrorCode.POST_NOT_AUTHOR);
+		}
+		postRepository.delete(post);
+	}
+}

src/main/java/com/cotato/kampus/global/error/ErrorCode.java

@@ -19,6 +19,7 @@ public enum ErrorCode {
 
 	//Post
 	POST_NOT_FOUND(HttpStatus.NOT_FOUND, "해당 게시글을 찾을 수 없습니다.", "POST-001"),
+	POST_NOT_AUTHOR(HttpStatus.FORBIDDEN, "게시글 작성자가 아니므로 삭제할 수 없습니다.", "POST-002"),
 
 	//File
 	FILE_EXTENSION_FAULT(HttpStatus.BAD_REQUEST, "F-001", "해당 파일 확장자 명이 존재하지 않습니다."),