#27 feat: Comment 생성 API구현

server/src/main/java/com/yogit/server/board/controller/CommenrController.java

@@ -0,0 +1,40 @@
+package com.yogit.server.board.controller;
+
+import com.yogit.server.board.dto.request.comment.CreateCommentReq;
+import com.yogit.server.board.dto.response.comment.CommentRes;
+import com.yogit.server.board.service.comment.CommentService;
+import com.yogit.server.global.dto.ApplicationResponse;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiResponse;
+import io.swagger.annotations.ApiResponses;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@Slf4j
+@RestController
+@RequiredArgsConstructor // private final DI의존주입
+@RequestMapping("/comments")
+public class CommenrController {
+
+    private final CommentService commentService;
+    /**
+     * 코멘트 등록
+     * @author 토마스
+     */
+    @ApiOperation(value = "코멘트 등록", notes = "코멘트 내용을 입력해 등록 요청.")
+    @ApiResponses({
+            @ApiResponse(code= 201, message = "요청에 성공하였습니다."),
+            @ApiResponse(code= 404, message = "존재하지 않는 유저입니다."),
+            @ApiResponse(code= 404, message = "존재하지 않는 클립보드입니다."),
+            @ApiResponse(code = 4000 , message =  "서버 오류입니다.")
+    })
+    @PostMapping("")
+    public ApplicationResponse<CommentRes> createComment(@RequestBody @Validated CreateCommentReq createCommentReq){
+        return commentService.createComment(createCommentReq);
+    }
+}

server/src/main/java/com/yogit/server/board/dto/request/comment/CreateCommentReq.java

@@ -0,0 +1,26 @@
+package com.yogit.server.board.dto.request.comment;
+
+import io.swagger.annotations.ApiModelProperty;
+import io.swagger.annotations.ApiParam;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.validation.constraints.NotBlank;
+
+@Data
+@NoArgsConstructor
+public class CreateCommentReq {
+
+    @ApiModelProperty(example = "1")
+    @ApiParam(value = "유저 ID", required = true)
+    private Long userId;
+
+    @ApiModelProperty(example = "1")
+    @ApiParam(value = "ClipBoard ID", required = true)
+    private Long clipBoardId;
+
+    @ApiModelProperty(example = "경복궁역 몇 번 출구인가요?")
+    @ApiParam(value = "클립보드 상세 내용", required = true)
+    @NotBlank
+    private String content;
+}

server/src/main/java/com/yogit/server/board/entity/Comment.java

@@ -1,5 +1,6 @@
 package com.yogit.server.board.entity;
 
+import com.yogit.server.board.dto.request.comment.CreateCommentReq;
 import com.yogit.server.config.domain.BaseEntity;
 import com.yogit.server.user.entity.User;
 import lombok.AccessLevel;
@@ -26,4 +27,14 @@ public class Comment extends BaseEntity {
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "clip_board_id")
     private ClipBoard clipBoard;
+
+    /*
+    연관관계 편의 메소드
+     */
+
+    public Comment(CreateCommentReq dto, User user, ClipBoard clipBoard) {
+        this.content = dto.getContent();
+        this.user = user;
+        this.clipBoard = clipBoard;
+    }
 }

server/src/main/java/com/yogit/server/board/service/comment/CommentService.java

@@ -0,0 +1,10 @@
+package com.yogit.server.board.service.comment;
+
+import com.yogit.server.board.dto.request.comment.CreateCommentReq;
+import com.yogit.server.board.dto.response.comment.CommentRes;
+import com.yogit.server.global.dto.ApplicationResponse;
+
+public interface CommentService {
+
+    ApplicationResponse<CommentRes> createComment(CreateCommentReq createCommentReq);
+}

server/src/main/java/com/yogit/server/board/service/comment/CommentServiceImpl.java

@@ -0,0 +1,46 @@
+package com.yogit.server.board.service.comment;
+
+import com.yogit.server.board.dto.request.comment.CreateCommentReq;
+import com.yogit.server.board.dto.response.comment.CommentRes;
+import com.yogit.server.board.entity.ClipBoard;
+import com.yogit.server.board.entity.Comment;
+import com.yogit.server.board.exception.clipboard.NotFoundClipBoardException;
+import com.yogit.server.board.repository.ClipBoardRepository;
+import com.yogit.server.board.repository.CommentRepository;
+import com.yogit.server.global.dto.ApplicationResponse;
+import com.yogit.server.user.entity.User;
+import com.yogit.server.user.exception.NotFoundUserException;
+import com.yogit.server.user.repository.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional(readOnly = true)
+@RequiredArgsConstructor
+public class CommentServiceImpl implements CommentService{
+
+    private final CommentRepository commentRepository;
+    private final UserRepository userRepository;
+    private final ClipBoardRepository clipBoardRepository;
+
+
+
+    @Transactional(readOnly = false)
+    @Override
+    public ApplicationResponse<CommentRes> createComment(CreateCommentReq dto){
+
+        User user = userRepository.findById(dto.getUserId())
+                .orElseThrow(() -> new NotFoundUserException());
+
+        ClipBoard clipBoard = clipBoardRepository.findClipBoardById(dto.getClipBoardId())
+                .orElseThrow(() -> new NotFoundClipBoardException());
+
+        Comment comment = new Comment(dto, user, clipBoard);
+        Comment savedComment = commentRepository.save(comment);
+        CommentRes commentRes = CommentRes.toDto(savedComment);
+        return ApplicationResponse.create("코멘트 생성을 성공했습니다.", commentRes);
+    }
+
+
+}