정은선 과제 제출

README.md

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+## TODO List
+- [ ] 게시글 작성 API 구현
+- [ ] 게시글 수정 API 구현
+- [ ] 게시글 삭제 API 구현
+  - [ ] 게시글 삭제 시 예외 케이스 구현
+  - [ ] 게시글이 이미 삭제된 경우 예외 처리
+  - [ ] 존재하지 않는 게시글 삭제 요청 시 예외 처리
+- [ ] 게시글 단건 조회 API 구현
+  - [ ] 게시글에 포함된 모든 댓글 목록을 조회
+
+- [ ] 댓글 작성 API 구현
+- [ ] 댓글 수정 API 구현
+- [ ] 댓글 삭제 API 구현
+
+...
+---
+
+## 구현 시 어렵거나 이해가 되지 않는 부분
+- 예외를 어떻게 던지고 처리해야 할지 모르겠다.
+- null 값 처리
+- DTO 변환 로직 구현
+- Optional을 활용한 코드
+- 트랜잭션과 @Transactional 사용법 - 클래스 레벨에 사용해도 되는지

src/main/java/io/sparta/board/BoardApplication.java

@@ -2,8 +2,10 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
 
 @SpringBootApplication
+@EnableJpaAuditing
 public class BoardApplication {
 
 	public static void main(String[] args) {

src/main/java/io/sparta/board/controller/CommentController.java

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+package io.sparta.board.controller;
+
+import io.sparta.board.dto.CommentRequestDto;
+import io.sparta.board.dto.CommentResponseDto;
+import io.sparta.board.entity.Comment;
+import io.sparta.board.service.CommentService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/posts/{postId}/comments")
+@RequiredArgsConstructor
+public class CommentController {
+    private final CommentService commentService;
+
+    /*
+    TODO 댓글 등록
+    - 댓글 내용은 필수 항목
+    - 댓글 등록 일자 자동 기록
+     */
+    @PostMapping
+    public ResponseEntity<CommentResponseDto> createComment(
+            @RequestBody CommentRequestDto req, @PathVariable UUID postId) {
+        CommentResponseDto createComment = commentService.createComment(req, postId);
+        return ResponseEntity.ok(createComment);
+    }
+
+    /*
+    TODO 댓글 수정
+    - 댓글 내용만 수정 가능
+    - 댓글 수정 일자 자동 기록
+     */
+    @PutMapping("/{commentId}")
+    public ResponseEntity<CommentResponseDto> updateComment(
+            @PathVariable UUID commentId, @RequestBody CommentRequestDto req) {
+        CommentResponseDto updatedComment = commentService.updateComment(commentId, req);
+        return ResponseEntity.ok(updatedComment);
+    }
+
+    /*
+    TODO 댓글 삭제
+    - 삭제 후 복구 불가능
+    - 댓글 삭제 시 삭제 상태에 대한 변경만 처리(soft-delete)
+     */
+    @DeleteMapping("/{commentId}")
+    public ResponseEntity<CommentResponseDto> deleteComment(@PathVariable UUID commentId) {
+        commentService.deleteComment(commentId);
+        return ResponseEntity.noContent().build();
+    }
+}

src/main/java/io/sparta/board/controller/PostController.java

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+package io.sparta.board.controller;
+
+import io.sparta.board.dto.PostRequestDto;
+import io.sparta.board.dto.PostResponseDto;
+import io.sparta.board.entity.Post;
+import io.sparta.board.repository.PostRepository;
+import io.sparta.board.service.PostService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/posts")
+@RequiredArgsConstructor
+public class PostController {
+    private final PostService postService;
+
+    /*
+    TODO 게시글 작성
+    - 게시글 제목, 내용은 필수 항목
+    - 게시글 작성 일자 자동 기록
+     */
+    @PostMapping
+    public ResponseEntity<PostResponseDto> createPost(@RequestBody PostRequestDto requestDto) {
+        PostResponseDto createdPost = postService.createPost(requestDto);
+        return  ResponseEntity.ok(createdPost);
+    }
+
+    /*
+    TODO 게시글 수정
+    - 제목과 내용만 수정 가능
+    - 게시글 수정 일자 자동 기록
+     */
+    @PutMapping("/{id}")
+    public ResponseEntity<PostResponseDto> updatePost(@PathVariable UUID id,
+                                                      @RequestBody PostRequestDto requestDto) {
+        PostResponseDto updatedPost = postService.updatePost(id, requestDto);
+        return ResponseEntity.ok(updatedPost);
+    }
+
+    /*
+    TODO 게시글 삭제
+
+     - 삭제 시 게시글과 함께 해당 게시글의 모든 댓글도 삭제 처리
+     - 삭제 후 복구 불가능
+     - 게시글 삭제 시 삭제 상태에 대한 변경만 처리(soft-delete)
+     */
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deletePost(@PathVariable UUID id) {
+        postService.deletePost(id);
+        return ResponseEntity.noContent().build();
+    }
+
+    /*
+    TODO 게시글 단건 조회
+    - 게시글에 포함된 모든 댓글 목록을 조회
+    - 삭제된 데이터는 조회 불가능
+     */
+    @GetMapping("/{id}")
+    public ResponseEntity<PostResponseDto> getPostById(@PathVariable UUID id) {
+        PostResponseDto getPost = postService.getPostById(id);
+        return ResponseEntity.ok(getPost);
+    }
+}

src/main/java/io/sparta/board/dto/CommentRequestDto.java

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+package io.sparta.board.dto;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class CommentRequestDto {
+    private String content;
+}

src/main/java/io/sparta/board/dto/CommentResponseDto.java

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+package io.sparta.board.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class CommentResponseDto {
+    private UUID id;
+    private String content;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+}

src/main/java/io/sparta/board/dto/PostRequestDto.java

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+package io.sparta.board.dto;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class PostRequestDto {
+    private String title;
+    private String content;
+}

src/main/java/io/sparta/board/dto/PostResponseDto.java

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+package io.sparta.board.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.UUID;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class PostResponseDto {
+    private UUID id;
+    private String title;
+    private String content;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+
+    private List<CommentResponseDto> comments;
+}

src/main/java/io/sparta/board/entity/BaseEntity.java

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+package io.sparta.board.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.MappedSuperclass;
+import lombok.Getter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.time.LocalDateTime;
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener.class)
+@Getter
+public class BaseEntity {
+    @CreatedDate
+    @Column(updatable = false)
+    private LocalDateTime createdAt;
+
+    @LastModifiedDate
+    private LocalDateTime updatedAt;
+}

src/main/java/io/sparta/board/entity/Comment.java

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+package io.sparta.board.entity;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
+
+import java.sql.Timestamp;
+import java.util.UUID;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Table(name = "p_comment")
+public class Comment extends BaseEntity {
+    @Id
+    @GeneratedValue
+    private UUID id;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id", nullable = false)
+    private Post post;
+
+    @Column(nullable = false, columnDefinition = "TEXT")
+    private String content;
+
+    @Column(nullable = false)
+    private boolean deleted=false;
+
+}

src/main/java/io/sparta/board/entity/Post.java

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+package io.sparta.board.entity;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
+
+import java.sql.Timestamp;
+import java.util.List;
+import java.util.UUID;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Table(name = "p_post")
+public class Post extends BaseEntity {
+    @Id
+    @GeneratedValue
+    private UUID id;
+
+    @Column(nullable = false, length = 100)
+    private String title;
+
+    @Column(nullable = false, columnDefinition = "TEXT")
+    private String content;
+
+    @Column(nullable = false)
+    private boolean deleted = false;
+
+    @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Comment> comments;
+}

src/main/java/io/sparta/board/repository/CommentRepository.java

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+package io.sparta.board.repository;
+
+import io.sparta.board.entity.Comment;
+import io.sparta.board.entity.Post;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+@Repository
+public interface CommentRepository extends JpaRepository<Comment, UUID> {
+}

src/main/java/io/sparta/board/repository/PostRepository.java

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+package io.sparta.board.repository;
+
+import io.sparta.board.entity.Post;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+import java.util.UUID;
+
+@Repository
+public interface PostRepository extends JpaRepository<Post, UUID> {
+    Optional<Post> findByIdAndDeletedFalse(UUID id);
+}