[feat] 게시글 댓글 등록, 삭제

src/main/java/com/alevel/backend/controller/CommentController.java

@@ -0,0 +1,36 @@
+package com.alevel.backend.controller;
+
+import com.alevel.backend.controller.dto.CommentRequestDto;
+import com.alevel.backend.controller.dto.CommentSaveDto;
+import com.alevel.backend.domain.response.ResultResponse;
+import com.alevel.backend.service.CommentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+public class CommentController {
+
+    @Autowired
+    private CommentService commentService;
+
+    @Autowired
+    public CommentController(CommentService commentService){this.commentService=commentService;}
+
+    //댓글 등록
+    @PostMapping(value="/posts/{id}/comment")
+    public ResultResponse saveComment(@PathVariable("id") Long id, @RequestBody CommentRequestDto requestDto){
+        CommentSaveDto dto = new CommentSaveDto(id, requestDto.getUserid(),requestDto.getContent());
+        commentService.saveComment(dto);
+        return ResultResponse.success();
+    }
+
+    //댓글 삭제
+    @DeleteMapping(value="/posts/{id}/comment")
+    public ResponseEntity deleteComment(@PathVariable("id") Long id){
+        commentService.delete(id);
+        return ResponseEntity.ok(id);
+    }
+
+
+}

src/main/java/com/alevel/backend/controller/dto/CommentRequestDto.java

@@ -0,0 +1,18 @@
+package com.alevel.backend.controller.dto;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class CommentRequestDto {
+    private Long userid;
+    private String content;
+
+    public CommentRequestDto(Long userid, String content){
+        this.userid=userid;
+        this.content=content;
+    }
+}

src/main/java/com/alevel/backend/controller/dto/CommentSaveDto.java

@@ -0,0 +1,19 @@
+package com.alevel.backend.controller.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class CommentSaveDto {
+    private Long userid;
+    private Long postid;
+    private String content;
+
+    public CommentSaveDto(Long userid, Long postid, String content){
+        this.userid=userid;
+        this.postid=postid;
+        this.content=content;
+    }
+
+}

src/main/java/com/alevel/backend/domain/comment/Comment.java

@@ -31,10 +31,10 @@ public class Comment extends BaseTimeEntity {
     @Column(columnDefinition = "TEXT")
     private String content;
 
-//    @Builder
-//    public Comment(User user, Post post,String content){
-//        this.user=user;
-//        this.post=post;
-//        this.content=content;
-//    }
+    @Builder
+    public Comment(User user, Post post,String content){
+        this.user=user;
+        this.post=post;
+        this.content=content;
+    }
 }

src/main/java/com/alevel/backend/domain/comment/CommentRepository.java

@@ -12,5 +12,7 @@ public interface CommentRepository extends JpaRepository<Comment, Long> {
 
     @Query(value="SELECT COUNT(*) FROM comment c WHERE c.user_id=user_id",nativeQuery = true)
     Integer myCommentCount(Long id);
+
+
 }
 

src/main/java/com/alevel/backend/service/CommentService.java

@@ -0,0 +1,50 @@
+package com.alevel.backend.service;
+
+import com.alevel.backend.controller.dto.CommentSaveDto;
+import com.alevel.backend.domain.alcohol.AlcoholRepository;
+import com.alevel.backend.domain.comment.Comment;
+import com.alevel.backend.domain.comment.CommentRepository;
+import com.alevel.backend.domain.post.Post;
+import com.alevel.backend.domain.post.PostRepository;
+import com.alevel.backend.domain.review.ReviewRepository;
+import com.alevel.backend.domain.user.User;
+import com.alevel.backend.domain.user.UserRepository;
+import com.alevel.backend.exception.ExceededNumberException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import javax.transaction.Transactional;
+
+@Service
+public class CommentService {
+    private final CommentRepository commentRepository;
+    private final UserRepository userRepository;
+
+    private final PostRepository postRepository;
+
+
+    @Autowired
+    public CommentService(CommentRepository commentRepository, UserRepository userRepository,PostRepository postRepository) {
+        this.postRepository=postRepository;
+        this.userRepository = userRepository;
+        this.commentRepository=commentRepository;
+    }
+    public void saveComment(CommentSaveDto dto) {
+        User user = userRepository.getReferenceById(dto.getUserid());
+        Post post= postRepository.getReferenceById(dto.getPostid());
+
+        if (dto.getContent().length()>100) {
+            throw new ExceededNumberException();
+        }
+        else{
+            commentRepository.save(new Comment(user, post, dto.getContent()));
+        }
+    }
+
+    @Transactional
+    public void delete(Long id) {
+        Comment comment = commentRepository.findById(id).orElseThrow(() ->
+                new IllegalArgumentException("존재하지 않는 댓글입니다. id=" + id));
+        commentRepository.delete(comment);
+    }
+}