[REST API] 17. Blog V3 : Reply

1. DTO Setting

• ReplyRequest

@Data
    public static class SaveDTO {
        @NotNull(message = "board의 id가 전달되어야 합니다")
        private Integer boardId;
        @NotEmpty(message = "내용을 입력하세요")
        private String content;

        public Reply toEntity(User sessionUser) {
            return Reply.builder()
                    .content(content)
                    .board(Board.builder().id(boardId).build())
                    .user(sessionUser)
                    .build();
        }
    }

• ReplyResponse

@Data
    public static class DTO {
        private Integer id;
        private String content;
        private Integer userId;
        private Integer boardId;
        private String createdAt; // 날짜는 String으로 리턴한다 (날짜 타입 공부하기 전까지)

        public DTO(Reply reply) {
            this.id = reply.getId();
            this.content = reply.getContent();
            this.userId = reply.getUser().getId();
            this.boardId = reply.getBoard().getId();
            this.createdAt = reply.getCreatedAt().toString();
        }
    }

2. 댓글 작성

• ReplyController

@PostMapping("/s/api/reply")
    public ResponseEntity<?> save(@Valid @RequestBody ReplyRequest.SaveDTO reqDTO, Errors errors) {
        User sessionUser = (User) session.getAttribute("sessionUser");
        ReplyResponse.DTO respDTO = replyService.댓글쓰기(reqDTO, sessionUser);
        return Resp.ok(respDTO);
    }

• ReplyService

@Transactional
    public ReplyResponse.DTO 댓글쓰기(ReplyRequest.SaveDTO reqDTO, User sessionUser) {
        Reply replyPS = replyRepository.save(reqDTO.toEntity(sessionUser));
        return new ReplyResponse.DTO(replyPS);
    }

Result

3. 댓글 삭제

• ReplyController

@DeleteMapping("/s/api/reply/{id}")
    public ResponseEntity<?> delete(@PathVariable("id") Integer id) {
        User sessionUser = (User) session.getAttribute("sessionUser");
        replyService.댓글삭제(id, sessionUser.getId());
        return Resp.ok(null);
    }

• ReplyService

@Transactional
    public void 댓글삭제(Integer id, Integer sessionUserId) {
        Reply replyPS = replyRepository.findById(id)
                .orElseThrow(() -> new ExceptionApi404("자원을 찾을 수 없습니다"));

        if (!replyPS.getUser().getId().equals(sessionUserId)) {
            throw new ExceptionApi403("권한이 없습니다");
        }

        replyRepository.deleteById(id);
    }

Result