23.12.07) TIL

게시글 좋아요 기능 좋아요 취소기능을 구현했다. (댓글도 만들었지만, 게시글 좋아요 기능과 변수만 다르고 거의 같다)

 

// 게시글 좋아요 하기
@PostMapping
public ResponseEntity<?> likePost(@PathVariable Long postId,
    @AuthenticationPrincipal UserDetailsImpl userDetails) {

  User loginUser = userDetails.getUser();
  likePostService.likePost(loginUser, postId);
  return ResponseEntity.status(HttpStatus.CREATED).body("요청 성공");
}

// 게시글 좋아요 하기
@Transactional
public LikePost likePost(User loginUser, Long postId) {
  Post post = postRepository.findById(postId).orElseThrow(PostNotFoundException::new);

  if (likePostRepository.findByUserAndPost(loginUser, post).isPresent()) {
    throw new DuplicatedLikeException();
  }

  LikePost likePost = LikePost.fromUserAndPost(loginUser, post);
  return likePostRepository.save(likePost);
}

 

 

// 게시글 좋아요 취소하기
@DeleteMapping
public ResponseEntity<?> unLikePost(@PathVariable Long postId,
    @AuthenticationPrincipal UserDetailsImpl userDetails) {

  User loginUser = userDetails.getUser();
  likePostService.unLikePost(loginUser, postId);
  return ResponseEntity.ok().body("요청 성공");
}

// 게시글 좋아요 취소하기
@Transactional
public void unLikePost(User loginUser, Long postId) {
  Post post = postRepository.findById(postId).orElseThrow(PostNotFoundException::new);

  LikePost likePost = likePostRepository.findByUserAndPost(loginUser, post)
      .orElseThrow(NotFoundLikeException::new);

  likePostRepository.deleteById(likePost.getId());
}