[스프링 부트 쇼핑몰 프로젝트 with JPA] 17-3. 게시판 - Service

이 내용은 스프링 부트 쇼핑몰 프로젝트 with JPA 책을 학습한 내용입니다.

Service

BoardService

  import com.example.walkingmate_back.board.dto.*;
  import com.example.walkingmate_back.board.entity.Board;
  import com.example.walkingmate_back.board.entity.BoardComment;
  import com.example.walkingmate_back.board.repository.BoardRepository;
  import com.example.walkingmate_back.user.entity.UserEntity;
  import com.example.walkingmate_back.user.repository.UserRepository;
  import lombok.RequiredArgsConstructor;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Pageable;
  import org.springframework.data.domain.Sort;
  import org.springframework.stereotype.Service;
  import org.springframework.transaction.annotation.Transactional;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;

  /**
   *    게시글 등록, 수정, 삭제, 단일 조회, 전체 조회
   *    - 서비스 로직
   *
   *   @version          1.00 / 2023.08.07
   *   @author           전우진
   */

  @Service
  @RequiredArgsConstructor
  @Transactional
  public class BoardService {

      private final BoardRepository boardRepository;
      private final UserRepository userRepository;

      /**
       * 사용자 확인 후 게시글 저장
       * - 전우진 2023.07.10
       */
      public BoardResponseDTO saveBoard(BoardRequestDTO boardRequestDTO, String userId) {
          UserEntity user = userRepository.findById(userId).orElse(null);

          if(user != null) { // 사용자가 존재하는 경우
              Board board = new Board(user, boardRequestDTO.getTitle(), boardRequestDTO.getContent());
              boardRepository.save(board);

              return BoardResponseDTO.builder()
                      .id(board.getId())
                      .userId(board.getUser().getId())
                      .title(board.getTitle())
                      .content(board.getContent())
                      .regTime(board.getRegTime())
                      .updateTime(board.getUpdateTime())
                      .recommend(board.getRecommend())
                      .build();
          } else {
              // 사용자가 존재하지 않는 경우
              return null;
          }
      }

      /**
       * 게시글 탐색 후 게시글 수정
       * - 전우진 2023.07.10
       */
      public BoardResponseDTO updateBoard(Board board, BoardUpdateDTO boardUpdateDTO, String userId) {

          if(userId.equals(board.getUser().getId())) {
              board.update(boardUpdateDTO);
              boardRepository.save(board);

              return BoardResponseDTO.builder()
                      .id(board.getId())
                      .userId(board.getUser().getId())
                      .title(board.getTitle())
                      .content(board.getContent())
                      .regTime(board.getRegTime())
                      .updateTime(board.getUpdateTime())
                      .recommend(board.getRecommend())
                      .build();
          }
          return null;
      }

      /**
       * 게시글 탐색 후 게시글 삭제
       * - 전우진 2023.07.10
       */
      public BoardResponseDTO deleteBoard(Board board, String userId) {
          if(userId.equals(board.getUser().getId())) {
              boardRepository.delete(board);

              return BoardResponseDTO.builder()
                      .id(board.getId())
                      .userId(board.getUser().getId())
                      .title(board.getTitle())
                      .content(board.getContent())
                      .regTime(board.getRegTime())
                      .updateTime(board.getUpdateTime())
                      .recommend(board.getRecommend())
                      .build();
          }
          return null;
      }

      /**
       * 단일 게시글 조회, 댓글 리턴
       * - 전우진 2023.07.11
       */
      public BoardResponseDTO getBoard(Long id, String userId) {
          Board board = boardRepository.findById(id).orElse(null);

          if(board != null) { // 게시글이 존재하는 경우
              // 댓글
              List<BoardComment> comments = board.getComments();

              List<BoardCommentResponseDTO> commentDTOList = new ArrayList<>();
              Map<Long, BoardCommentResponseDTO> commentDTOHashMap = new HashMap<>();

              comments.forEach( c -> {
                  BoardCommentResponseDTO boardCommentResponseDTO = new BoardCommentResponseDTO(c.getId(), c.getBoard().getId(), c.getUser().getId(), c.getContent(), c.getParent() == null ? 0 : c.getParent().getId(), c.getRegTime(), c.getUpdateTime());
                  commentDTOHashMap.put(boardCommentResponseDTO.getId(), boardCommentResponseDTO);
                  if(c.getParent() != null) commentDTOHashMap.get(c.getParent().getId()).getChildren().add(boardCommentResponseDTO);
                  else commentDTOList.add(boardCommentResponseDTO);
              });

              return BoardResponseDTO.builder()
                      .id(board.getId())
                      .userId(board.getUser().getId())
                      .title(board.getTitle())
                      .content(board.getContent())
                      .regTime(board.getRegTime())
                      .updateTime(board.getUpdateTime())
                      .recommend(board.getRecommend())
                      .isrecommend(board.getRecommends().stream().anyMatch(recommend -> recommend.getUser().getId().equals(userId)))
                      .comments(commentDTOList)
                      .build();

          } else {
              // 게시글이 존재하지 않는 경우

              return null;
          }
      }

      /**
       * 게시글 페이징 후 최근 값부터 댓글 포함 리턴
       * - 전우진 2023.07.11
       */
      public List<BoardResponseDTO> getAllBoard(int page, String userId) {

          Pageable pageable = PageRequest.of(page - 1, 10, Sort.by("id").descending());

          List<Board> boards = boardRepository.findAllBoard(pageable);
          List<BoardResponseDTO> result = new ArrayList<>();

          for (Board board : boards) {
              List<BoardCommentResponseDTO> commentDTOList = new ArrayList<>();
              Map<Long, BoardCommentResponseDTO> commentDTOHashMap = new HashMap<>();

              board.getComments().forEach( c -> {
                  BoardCommentResponseDTO boardCommentResponseDTO = new BoardCommentResponseDTO(c.getId(), c.getBoard().getId(), c.getUser().getId(), c.getContent(), c.getParent() == null ? 0 : c.getParent().getId(), c.getRegTime(), c.getUpdateTime());
                  commentDTOHashMap.put(boardCommentResponseDTO.getId(), boardCommentResponseDTO);
                  if(c.getParent() != null) commentDTOHashMap.get(c.getParent().getId()).getChildren().add(boardCommentResponseDTO);
                  else commentDTOList.add(boardCommentResponseDTO);
              });

              BoardResponseDTO boardResponseDTO = new BoardResponseDTO(
                      board.getId(),
                      board.getUser().getId(),
                      board.getTitle(),
                      board.getContent(),
                      board.getRegTime(),
                      board.getUpdateTime(),
                      board.getRecommend(),
                      board.getRecommends().stream().anyMatch(recommend -> recommend.getUser().getId().equals(userId)),
                      commentDTOList
              );

              result.add(boardResponseDTO);
          }

          return result;
      }

      public Board FindBoard(Long id){
          return boardRepository.findById(id).orElse(null);
      }
  }

BoardCommentService

  import com.example.walkingmate_back.board.dto.*;
  import com.example.walkingmate_back.board.entity.Board;
  import com.example.walkingmate_back.board.entity.BoardComment;
  import com.example.walkingmate_back.board.repository.BoardCommentRepository;
  import com.example.walkingmate_back.board.repository.BoardRepository;
  import com.example.walkingmate_back.user.entity.UserEntity;
  import lombok.RequiredArgsConstructor;
  import org.springframework.stereotype.Service;
  import org.springframework.transaction.annotation.Transactional;

  /**
   *    댓글 등록, 수정, 삭제 - 대댓글 포함
   *    - 서비스 로직
   *
   *   @version          1.00 / 2023.08.07
   *   @author           전우진
   */

  @Service
  @RequiredArgsConstructor
  @Transactional
  public class BoardCommentService {
      private final BoardCommentRepository boardCommentRepository;
      private final BoardRepository boardRepository;

      /**
       * 게시글 & 사용자 확인 후 댓글 저장
       * - 전우진 2023.08.07
       */
      public BoardCommentResponseDTO saveCommemt(BoardCommentRequestDTO boardCommentRequestDTO, UserEntity user, Long boardId) {

          Board board = boardRepository.findById(boardId).orElse(null);
          if(board == null) return null; // 게시글이 존재하지 않는 경우

          BoardComment boardComment = new BoardComment(user, board, boardCommentRequestDTO.getContent());

          BoardComment parentComment;
          Long parentId = 0L;
          if(boardCommentRequestDTO.getParentId() != null) { // 부모 댓글이 있는 경우
              parentComment = boardCommentRepository.findById(boardCommentRequestDTO.getParentId()).orElse(null);

              boardComment.updateParent(parentComment);
              parentId = parentComment.getId();
          }

          boardCommentRepository.save(boardComment);

          return BoardCommentResponseDTO.builder()
                  .id(boardComment.getId())
                  .boardId(boardComment.getBoard().getId())
                  .userId(boardComment.getUser().getId())
                  .content(boardComment.getContent())
                  .regTime(boardComment.getRegTime())
                  .updateTime(boardComment.getUpdateTime())
                  .parentId(parentId)
                  .recommend(boardComment.getRecommend())
                  .build();
      }

      /**
       * 게시글 탐색 후 댓글 수정
       * - 전우진 2023.08.07
       */
      public BoardCommentResponseDTO updateComment(BoardComment boardComment, BoardCommentUpdateDTO boardCommentUpdateDTO, String userId) {
          if(userId.equals(boardComment.getUser().getId())) {
              boardComment.update(boardCommentUpdateDTO);
              boardCommentRepository.save(boardComment);

              return BoardCommentResponseDTO.builder()
                      .id(boardComment.getId())
                      .boardId(boardComment.getBoard().getId())
                      .userId(boardComment.getUser().getId())
                      .content(boardComment.getContent())
                      .regTime(boardComment.getRegTime())
                      .updateTime(boardComment.getUpdateTime())
                      .recommend(boardComment.getRecommend())
                      .build();
          }
          return null;
      }

      /**
       * 게시글 탐색 후 댓글 삭제
       * - 전우진 2023.08.07
       */
      public BoardCommentResponseDTO deleteComment(BoardComment boardComment, String userId) {

          if(boardComment.getChildren().size() != 0) { // 자식 있는 경우
              boardCommentRepository.deleteAllByParentId(boardComment.getId());
              boardCommentRepository.delete(boardComment);
          } else {
              boardCommentRepository.delete(boardComment);
          }
          return BoardCommentResponseDTO.builder()
                  .id(boardComment.getId())
                  .boardId(boardComment.getBoard().getId())
                  .userId(boardComment.getUser().getId())
                  .content(boardComment.getContent())
                  .regTime(boardComment.getRegTime())
                  .updateTime(boardComment.getUpdateTime())
                  .recommend(boardComment.getRecommend())
                  .build();
      }

      public BoardComment FindBoardComment(Long id){
          return boardCommentRepository.findById(id).orElse(null);
      }

  }

*RecommendService

import com.example.walkingmate_back.board.dto.BoardCommentResponseDTO;
import com.example.walkingmate_back.board.dto.BoardResponseDTO;
import com.example.walkingmate_back.board.entity.Board;
import com.example.walkingmate_back.board.entity.BoardComment;
import com.example.walkingmate_back.board.entity.Recommend;
import com.example.walkingmate_back.board.entity.RecommendComment;
import com.example.walkingmate_back.board.repository.BoardCommentRepository;
import com.example.walkingmate_back.board.repository.BoardRepository;
import com.example.walkingmate_back.board.repository.RecommendCommentRepository;
import com.example.walkingmate_back.board.repository.RecommendRepository;
import com.example.walkingmate_back.user.entity.UserEntity;
import com.example.walkingmate_back.user.repository.UserRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**

게시글 좋아요, 댓글 좋아요 저장
- 서비스 로직
@version 1.00 / 2023.08.30
@author 전우진
/

@Service
@RequiredArgsConstructor
@Transactional
public class RecommendService {

private final RecommendRepository recommendRepository;
private final UserRepository userRepository;
private final BoardRepository boardRepository;
private final BoardCommentRepository boardCommentRepository;
private final RecommendCommentRepository recommendCommentRepository;

/**
 * 좋아요 존재 여부 확인 후 체크
 * - 전우진 2023.08.04
 */
public BoardResponseDTO saveRecommend(Long boardId, String userId) {
    Board board = boardRepository.findById(boardId).orElse(null);
    if(board != null) {
        // 좋아요 존재 여부
        boolean existingRecommend = recommendRepository.existsByBoardIdAndUserId(boardId, userId);

        // 존재하는 경우 - 좋아요 - 1
        if(existingRecommend) {

            if(board != null) {
                board.setRecommend(board.getRecommend() - 1);
            }

            recommendRepository.deleteByBoardIdAndUserId(boardId, userId);

            return BoardResponseDTO.builder()
                    .id(board.getId())
                    .userId(board.getUser().getId())
                    .title(board.getTitle())
                    .content(board.getContent())
                    .recommend(board.getRecommend())
                    .isrecommend(false)
                    .build();
        }

        // 존재하지 않는 경우 - 좋아요 + 1
        UserEntity user = userRepository.findById(userId).orElse(null);

        if(user == null || board == null) {
            return null;
        }

        board.setRecommend(board.getRecommend() + 1);

        Recommend newRecommend = new Recommend(user, board);
        recommendRepository.save(newRecommend);

        return BoardResponseDTO.builder()
                .id(board.getId())
                .userId(board.getUser().getId())
                .title(board.getTitle())
                .content(board.getContent())
                .recommend(board.getRecommend())
                .isrecommend(true)
                .build();
    } else {
        return null;
    }
}

/**
 * 댓글 좋아요 존재 여부 확인 후 체크
 * - 전우진 2023.08.30
 */
public BoardCommentResponseDTO saveRecommendComment(Long commentId, String userId) {
    BoardComment boardComment = boardCommentRepository.findById(commentId).orElse(null);
    if(boardComment != null) {
        // 좋아요 존재 여부
        boolean existingRecommend = recommendCommentRepository.existsByBoardCommentIdAndUserId(commentId, userId);

        // 존재하는 경우 - 좋아요 - 1
        if(existingRecommend) {

            if(boardComment != null) {
                boardComment.setRecommend(boardComment.getRecommend() - 1);
            }

            recommendCommentRepository.deleteByBoardCommentIdAndUserId(commentId, userId);

            return BoardCommentResponseDTO.builder()
                    .id(boardComment.getId())
                    .boardId(boardComment.getBoard().getId())
                    .userId(boardComment.getUser().getId())
                    .content(boardComment.getContent())
                    .regTime(boardComment.getRegTime())
                    .updateTime(boardComment.getUpdateTime())
                    .recommend(boardComment.getRecommend())
                    .isrecommend(false)
                    .build();
        }

        // 존재하지 않는 경우 - 좋아요 + 1
        UserEntity user = userRepository.findById(userId).orElse(null);

        if(user == null || boardComment == null) {
            return null;
        }

        boardComment.setRecommend(boardComment.getRecommend() + 1);

        RecommendComment newRecommend = new RecommendComment(user, boardComment);
        recommendCommentRepository.save(newRecommend);

        return BoardCommentResponseDTO.builder()
                .id(boardComment.getId())
                .boardId(boardComment.getBoard().getId())
                .userId(boardComment.getUser().getId())
                .content(boardComment.getContent())
                .regTime(boardComment.getRegTime())
                .updateTime(boardComment.getUpdateTime())
                .recommend(boardComment.getRecommend())
                .isrecommend(true)
                .build();
    } else {
        return null;
    }
}

}
```

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Service

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