Spring

39. 댓글쓰기v6

송민경's avatar
송민경
Mar 19, 2024
39. 댓글쓰기v6

1. Board 에서 수정하기

  • isOwner → isBoardOwner
package shop.mtcoding.blog.board;

import jakarta.persistence.*;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.CreationTimestamp;
import shop.mtcoding.blog._core.utils.MyDateUtil;
import shop.mtcoding.blog.reply.Reply;
import shop.mtcoding.blog.user.User;

import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.List;

@NoArgsConstructor
@Data
@Table(name = "board_tb")
@Entity
public class Board {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String title;
    private String content;

    //@JoinColumn(name = "user_id")
    @ManyToOne(fetch = FetchType.LAZY)
    private User user; // db -> user_id

    @CreationTimestamp // pc -> db (날짜주입)
    private Timestamp createdAt;

    @OneToMany(mappedBy = "board", fetch = FetchType.LAZY, cascade = CascadeType.REMOVE) // Entity 객체의 변수명 == FK의 주인
    private List<Reply> replies = new ArrayList<>();

    @Transient // 테이블 생성이 안됨
    private boolean isBoardOwner;

    @Builder
    public Board(Integer id, String title, String content, User user, Timestamp createdAt) {
        this.id = id;
        this.title = title;
        this.content = content;
        this.user = user;
        this.createdAt = createdAt;
    }

    public String getBoardDate() {
        return MyDateUtil.timestampFormat(createdAt);
    }
}
 

2. Reply 에서 isReplyOwner 추가하기 

package shop.mtcoding.blog.reply;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIncludeProperties;
import jakarta.persistence.*;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.CreationTimestamp;
import shop.mtcoding.blog.board.Board;
import shop.mtcoding.blog.user.User;
import shop.mtcoding.blog._core.utils.MyDateUtil;

import java.sql.Timestamp;

@NoArgsConstructor
@Data // 변경되는 데이터에만 setter가 필요함
@Table(name = "reply_tb")
@Entity
public class Reply {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    private String comment;

    // 1(user) 대 N(reply)의 관계
    @ManyToOne(fetch = FetchType.LAZY)
    private User user; // user_id

    // 1(board) 대 N(reply)의 관계
    @ManyToOne(fetch = FetchType.LAZY)
    private Board board;

    @Transient
    private boolean isReplyOwner;

    @CreationTimestamp // PC로 인해 DB에 INSERT될 때 날짜 주입
    private Timestamp createdAt;

    @Builder
    public Reply(Integer id, String comment, User user, Board board, Timestamp createdAt) {
        this.id = id;
        this.comment = comment;
        this.user = user;
        this.board = board;
        this.createdAt = createdAt;
    }
}
 

3. BoardService 에서 isBoardOwner로 수정하기

isReplyOwner 추가하기 

package shop.mtcoding.blog.board;

import lombok.RequiredArgsConstructor;
import org.springframework.data.domain.Sort;
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.user.User;

import java.util.List;

@RequiredArgsConstructor
@Service
public class BoardService {

    private final BoardJPARepository boardJPARepository;

    // board와 isOwner를 응답해야하나 method는 하나밖에 응답할 수 없음 -> 하나의 덩어리로 만들어서 줘야 함
    public Board detail(int boardId, User sessionUser) {
        Board board = boardJPARepository.findByIdJoinUser(boardId)
                .orElseThrow(() -> new Exception404("게시글을 찾을 수 없습니다"));

        boolean isBoardOwner = false;
        if(sessionUser != null){
            if(sessionUser.getId() == board.getUser().getId()){
                isBoardOwner = true;
            }
        }
        board.setBoardOwner(isBoardOwner);

        board.getReplies().forEach(reply -> {
            boolean isReplyOwner = false;

            if(sessionUser != null){
                if(reply.getUser().getId() == sessionUser.getId()){
                    isReplyOwner = true;
                }
            }
            reply.setReplyOwner(isReplyOwner);
        });

        return board;
    }

    public List<Board> findAll() {
        Sort sort = Sort.by(Sort.Direction.DESC, "id");
        return boardJPARepository.findAll(sort);
    }

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

    public void update(int boardId, int sessionUserId, BoardRequest.UpdateDTO reqDTO) {

        Board board = boardJPARepository.findById(boardId)
                .orElseThrow(() -> new Exception404("게시글을 찾을 수 없습니다"));

        board.setTitle(reqDTO.getTitle());
        board.setContent(reqDTO.getContent());
    }

    public Board updateForm(int boardId, int sessionUserId) {
        // 1. 조회 및 예외처리
        Board board = boardJPARepository.findById(boardId)
                .orElseThrow(() -> new Exception404("게시글을 찾을 수 없습니다"));
        // 2. 권한 처리
        if (sessionUserId != board.getUser().getId()) {
            throw new Exception403("게시글 수정페이지로 이동할 권한이 없습니다");
        }
        return board;
    }

    @Transactional
    public void save(BoardRequest.SaveDTO reqDTO, User sessionUser) {
        boardJPARepository.save(reqDTO.toEntity(sessionUser));
    }
}
 

4. detail.mustache에서 수정하기

  • {{#board.boardOwner}}
  • {{#replyOwner}}
{{> /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="/reply/{{id}}/delete" method="post">
                            <button class="btn">🗑</button>
                        </form>
                    {{/replyOwner}}
                </div>
            {{/board.replies}}
        </div>
    </div>
</div>

{{> /layout/footer}}
 

5. ReplyRequest 에서 SaveDTO 만들기

  • 정보를 가방에 담아서 뷰에 전달하기
package shop.mtcoding.blog.reply;

import lombok.Data;
import shop.mtcoding.blog.board.Board;
import shop.mtcoding.blog.user.User;

public class ReplyRequest {

    @Data
    public static class SaveDTO {
        private Integer boardId;
        private String comment;

        public Reply toEntity(User sessionUser, Board board){
            return Reply.builder()
                    .comment(comment)
                    .board(board)
                    .user(sessionUser)
                    .build();
        }
    }
}
 

6. ReplyController 에서 save 만들기

package shop.mtcoding.blog.reply;

import jakarta.servlet.http.HttpSession;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Controller;
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();
    }
}
 

7. WebMvcConfig 에서 “/reply/**” 주소 추가하기

package shop.mtcoding.blog._core.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import shop.mtcoding.blog._core.intercepter.LoginInterceptor;

@Configuration // IoC
public class WebMvcConfig implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginInterceptor())
                .addPathPatterns("/board/**", "/user/**", "/reply/**")
                .excludePathPatterns("/board/{id:\\d+}");
    }
}
 

8. ReplyService 에 save 추가하기

  • 먼저 게시글을 조회하고 그 게시글에 댓글 저장하기
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.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 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);
    }
}
 

9. SaveDTO 에 Reply toEntity 에 .board() 수정하기

  • board를 조회해서 넣어야 함
package shop.mtcoding.blog.reply;

import lombok.Data;
import shop.mtcoding.blog.board.Board;
import shop.mtcoding.blog.user.User;

public class ReplyRequest {

    @Data
    public static class SaveDTO {
        private Integer boardId;
        private String comment;

        public Reply toEntity(User sessionUser, Board board){
            return  Reply.builder()
                    .comment(comment)
                    .board(board) // 조회해서 넣어야 함
                    .user(sessionUser)
                    .build();
        }
    }
}
notion image
 

10. 댓글 목록 정렬하기

 @OrderBy("id desc") // 최신순으로 정렬
package shop.mtcoding.blog.board;

import jakarta.persistence.*;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.CreationTimestamp;
import shop.mtcoding.blog._core.utils.MyDateUtil;
import shop.mtcoding.blog.reply.Reply;
import shop.mtcoding.blog.user.User;

import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.List;

@NoArgsConstructor
@Data
@Table(name = "board_tb")
@Entity
public class Board {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String title;
    private String content;

    //@JoinColumn(name = "user_id")
    @ManyToOne(fetch = FetchType.LAZY)
    private User user; // db -> user_id

    @CreationTimestamp // pc -> db (날짜주입)
    private Timestamp createdAt;

    @OrderBy("id desc")
    @OneToMany(mappedBy = "board", fetch = FetchType.LAZY, cascade = CascadeType.REMOVE) // Entity 객체의 변수명 == FK의 주인
    private List<Reply> replies = new ArrayList<>();

    @Transient // 테이블 생성이 안됨
    private boolean isBoardOwner;

    @Builder
    public Board(Integer id, String title, String content, User user, Timestamp createdAt) {
        this.id = id;
        this.title = title;
        this.content = content;
        this.user = user;
        this.createdAt = createdAt;
    }

    public String getBoardDate() {
        return MyDateUtil.timestampFormat(createdAt);
    }
}
notion image
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