40. 댓글삭제하기v6

1. detail.mustache에 주소 수정하기

• boardId와 replyId 두 개가 필요함!

{{> /layout/header}}

<div class="container p-5">

    {{#board.boardOwner}}
        <!-- 수정삭제버튼 -->
        <div class="d-flex justify-content-end">
            <a href="/board/{{board.id}}/update-form" class="btn btn-warning me-1">수정</a>
            <form action="/board/{{board.id}}/delete" method="post">
                <button class="btn btn-danger">삭제</button>
            </form>
        </div>
    {{/board.boardOwner}}

    <div class="d-flex justify-content-end">
        <b>작성자</b> : {{board.user.username}}
    </div>

    <!-- 게시글내용 -->
    <div>
        <h2><b>{{board.title}}</b></h2>
        <hr/>
        <div class="m-4 p-2">
            {{board.content}}
        </div>
    </div>

    <!-- 댓글 -->
    <div class="card mt-3">
        <!-- 댓글등록 -->
        <div class="card-body">
            <form action="/reply/save" method="post">
                <input type="hidden" name="boardId" value="{{board.id}}">
                <textarea class="form-control" rows="2" name="comment"></textarea>
                <div class="d-flex justify-content-end">
                    <button type="submit" class="btn btn-outline-primary mt-1">댓글등록</button>
                </div>
            </form>
        </div>

        <!-- 댓글목록 -->
        <div class="card-footer">
            <b>댓글리스트</b>
        </div>
        <div class="list-group">
            {{#board.replies}}
                <!-- 댓글아이템 -->
                <div class="list-group-item d-flex justify-content-between align-items-center">
                    <div class="d-flex">
                        <div class="px-1 me-1 bg-primary text-white rounded">{{user.username}}</div>
                        <div>{{comment}}</div>
                    </div>
                    {{#replyOwner}}
                        <form action="/board/{{board.id}}/reply/{{id}}/delete" method="post">
                            <button class="btn">🗑</button>
                        </form>
                    {{/replyOwner}}
                </div>
            {{/board.replies}}
        </div>
    </div>
</div>

{{> /layout/footer}}

2. ReplyController에서 delete 만들기

• boardId와 replyId 두 개가 필요함!

package shop.mtcoding.blog.reply;

import jakarta.servlet.http.HttpSession;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import shop.mtcoding.blog.user.User;

@RequiredArgsConstructor
@Controller
public class ReplyController {

    private final ReplyService replyService;
    private final HttpSession session;

    @PostMapping("/reply/save")
    public String save(ReplyRequest.SaveDTO reqDTO) {
        User sessionUser = (User) session.getAttribute("sessionUser");
        replyService.save(reqDTO, sessionUser);
        return "redirect:/board/" + reqDTO.getBoardId();
    }

    @PostMapping("/board/{boardId}/reply/{replyId}/delete")
    public String delete(@PathVariable Integer boardId, @PathVariable Integer replyId) {
        User sessionUser = (User) session.getAttribute("sessionUser");
        replyService.delete(replyId, sessionUser.getId());
        return "redirect:/board/" + boardId;
    }
}

3. ReplyService 에서 delete() 만들기

package shop.mtcoding.blog.reply;

import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import shop.mtcoding.blog._core.errors.exception.Exception403;
import shop.mtcoding.blog._core.errors.exception.Exception404;
import shop.mtcoding.blog.board.Board;
import shop.mtcoding.blog.board.BoardJPARepository;
import shop.mtcoding.blog.user.User;

@RequiredArgsConstructor
@Service
public class ReplyService {

    private final BoardJPARepository boardJPARepository;
    private final ReplyJPARepository replyJPARepository;

    @Transactional
    public void delete(int boardId, Integer sessionUserId) {
        Reply reply = replyJPARepository.findById(boardId)
                .orElseThrow(() -> new Exception404("댓글을 찾을 수 없습니다"));
        if (sessionUserId != reply.getUser().getId()) {
            throw new Exception403("댓글을 삭제할 권한이 없습니다");
        }
        replyJPARepository.deleteById(boardId);
    }

    @Transactional
    public void save(ReplyRequest.SaveDTO reqDTO, User sessionUser) {
        Board board = boardJPARepository.findById(reqDTO.getBoardId())
                .orElseThrow(() -> new Exception404("없는 게시글에 댓글을 작성할 수 없어요"));

        Reply reply = reqDTO.toEntity(sessionUser, board);

        replyJPARepository.save(reply);
    }
}