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1.게시글 작성, 2.게시글 목록 조회(게시판), 3.게시글 조회, 4.게시글에 댓글 작성, 5.댓글에 대댓글 작성, 6.대댓글 조회 기능 초안 구현하여 second commit
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8 files changed

Lines changed: 437 additions & 35 deletions

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‎src/main/java/com/webservice/algorithmchef/controller/BoardController.java‎

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package com.webservice.algorithmchef.controller;
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import com.webservice.algorithmchef.dto.board.BoardCommentRequest;
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import com.webservice.algorithmchef.dto.board.BoardPostResponse;
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import com.webservice.algorithmchef.dto.board.BoardPostListResponse;
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import com.webservice.algorithmchef.dto.board.BoardPostRequest;
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import com.webservice.algorithmchef.dto.board.CommentReplyListResponse;
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import com.webservice.algorithmchef.service.BoardService;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.ResponseEntity;
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import org.springframework.security.core.annotation.AuthenticationPrincipal;
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import org.springframework.security.core.userdetails.UserDetails;
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import org.springframework.web.bind.annotation.*;
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import java.util.Map;
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@Slf4j
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@RestController
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@RequestMapping("/board")
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@RequiredArgsConstructor
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public class BoardController {
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private final BoardService boardService;
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/**
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* 1. 게시글 목록 조회
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* GET /board/posts
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*/
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@GetMapping("/posts")
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public ResponseEntity<BoardPostListResponse> getPostList(
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@RequestParam(defaultValue = "0") int page,
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@RequestParam(defaultValue = "20") int size,
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@RequestParam(defaultValue = "createdAt,desc") String sort,
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@RequestParam(required = false) String filter
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) {
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BoardPostListResponse response = boardService.getPostList(page, size, sort, filter);
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return ResponseEntity.ok(response);
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}
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/**
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* 2. 새 게시글 작성
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* POST /board/post
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*/
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@PostMapping("/post")
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public ResponseEntity<Map<String, String>> createPost(
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@RequestBody BoardPostRequest requestDto,
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@AuthenticationPrincipal UserDetails userDetails
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) {
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if (userDetails == null) {
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return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
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}
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boardService.createPost(requestDto, userDetails.getUsername());
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return ResponseEntity.status(HttpStatus.CREATED)
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.body(Map.of("message", "새 게시글 작성완료 되었습니다."));
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}
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/**
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* 3. 게시글 상세 조회
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* GET /board/post/{postId}
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*/
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@GetMapping("/post/{postId}")
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public ResponseEntity<BoardPostResponse> getPostDetail(
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@PathVariable Long postId,
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@RequestParam(defaultValue = "0") int page,
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@RequestParam(defaultValue = "20") int size,
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@RequestParam(defaultValue = "createdAt,asc") String sort
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) {
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try {
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BoardPostResponse response = boardService.getPostDetail(postId, page, size, sort);
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return ResponseEntity.ok(response);
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} catch (IllegalArgumentException e) {
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return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
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}
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}
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/**
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* 6. 댓글 작성
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* POST /board/post/{postId}/comment
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*/
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@PostMapping("/post/{postId}/comment")
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public ResponseEntity<Map<String, String>> createComment(
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@PathVariable Long postId,
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@RequestBody BoardCommentRequest requestDto,
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@AuthenticationPrincipal UserDetails userDetails
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) {
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if (userDetails == null) {
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return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
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}
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try {
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boardService.createComment(postId, requestDto, userDetails.getUsername());
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return ResponseEntity.status(HttpStatus.CREATED)
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.body(Map.of("message", "댓글 작성완료"));
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} catch (IllegalArgumentException e) {
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return ResponseEntity.badRequest().body(Map.of("error", e.getMessage()));
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}
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}
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/**
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* 5. 대댓글 조회
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* GET /board/comments/{commentId}/replies
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*/
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@GetMapping("/comments/{commentId}/replies")
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public ResponseEntity<CommentReplyListResponse> getReplies(
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@PathVariable Long commentId,
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@RequestParam(defaultValue = "0") int page,
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@RequestParam(defaultValue = "20") int size,
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@RequestParam(defaultValue = "createdAt,asc") String sort
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) {
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try {
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CommentReplyListResponse response = boardService.getReplies(commentId, page, size, sort);
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return ResponseEntity.ok(response);
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} catch (IllegalArgumentException e) {
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return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
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}
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}
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}

‎src/main/java/com/webservice/algorithmchef/dto/board/BoardPostListResponse.java‎

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package com.webservice.algorithmchef.dto.board;
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import com.webservice.algorithmchef.model.BoardPost;
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import lombok.AllArgsConstructor;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import java.time.format.DateTimeFormatter;
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import java.util.List;
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@Getter
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@NoArgsConstructor
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@AllArgsConstructor
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@Builder
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public class BoardPostListResponse {
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// 목록 조회 시 반환할 래퍼 클래스
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private List<BoardPostSimple> posts;
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private PageInfo pageInfo;
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@Getter
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@Builder
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public static class BoardPostSimple {
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private String title;
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private String userId;
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private String createdAt;
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private String category;
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private String content; // 목록 미리보기용
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public static BoardPostSimple from(BoardPost post) {
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return BoardPostSimple.builder()
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.title(post.getTitle())
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// User 엔티티의 userId (로그인 아이디) 사용
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.userId(post.getUser().getUserId())
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// 날짜 포맷팅 (yyyy-MM-dd)
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.createdAt(post.getCreatedAt().format(DateTimeFormatter.ofPattern("yyyy-MM-dd")))
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.category(post.getCategory())
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.content(post.getContent())
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.build();
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}
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}
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}

‎src/main/java/com/webservice/algorithmchef/dto/board/BoardPostResponse.java‎

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@@ -1,5 +1,6 @@
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package com.webservice.algorithmchef.dto.board;
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import com.webservice.algorithmchef.model.BoardComment;
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import com.webservice.algorithmchef.model.BoardPost;
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import lombok.AllArgsConstructor;
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import lombok.Builder;
@@ -14,31 +15,53 @@
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@AllArgsConstructor
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@Builder
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public class BoardPostResponse {
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private Long postId;
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private Long userId; // 작성자 식별자
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private String writerName; // 작성자 닉네임/이름 (User 테이블 조인 필요 시)
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private String userId;
2120
private String category;
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private String title;
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private String content; // BLOB -> String 변환된 내용
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private String content;
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private LocalDateTime createdAt;
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private LocalDateTime modifiedDate;
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private List<CommentSimple> comments;
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private PageInfo pageInfo;
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@Getter
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@Builder
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public static class CommentSimple {
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private Long commentId;
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private String userId;
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private String content;
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private LocalDateTime createdAt;
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private boolean isDeleted;
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private int replyCount;
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27-
// 해당 게시글에 달린 댓글 목록 (선택사항: 상세 조회 시 같이 내려줄 경우 필요)
28-
private List<BoardCommentResponse> comments;
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public static CommentSimple from(BoardComment comment) {
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// 삭제된 댓글 처리
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String displayContent = comment.isDeleted() ? "삭제된 댓글입니다." : comment.getContent();
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// 유저 처리 (삭제된 유저일 경우 로직 추가 가능, 여기선 기본 처리)
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String displayUserId = comment.getUser() != null ? comment.getUser().getUserId() : "(삭제된 사용자)";
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return CommentSimple.builder()
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.commentId(comment.getCommentId())
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.userId(displayUserId)
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.content(displayContent)
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.createdAt(comment.getCreatedAt())
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.isDeleted(comment.isDeleted())
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// 대댓글 개수 (Children 리스트 사이즈)
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.replyCount(comment.getChildren().size())
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.build();
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}
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}
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30-
// Entity -> DTO 변환 편의 메서드
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public static BoardPostResponse from(BoardPost post, String writerName, List<BoardCommentResponse> comments) {
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public static BoardPostResponse of(BoardPost post, List<CommentSimple> comments, PageInfo pageInfo) {
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return BoardPostResponse.builder()
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.postId(post.getPostId())
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.userId(post.getUser().getId()) // User 객체에서 ID 추출 가정
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.writerName(writerName)
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.userId(post.getUser().getUserId())
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.category(post.getCategory())
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.title(post.getTitle())
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.content(post.getContent()) // post.getContent()가 String을 반환한다고 가정
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.content(post.getContent())
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.createdAt(post.getCreatedAt())
40-
.modifiedDate(post.getModifiedDate())
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.comments(comments)
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.pageInfo(pageInfo)
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.build();
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}
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}

‎src/main/java/com/webservice/algorithmchef/dto/board/CommentReplyListResponse.java‎

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package com.webservice.algorithmchef.dto.board;
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import com.webservice.algorithmchef.dto.board.BoardPostResponse.CommentSimple;
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import lombok.AllArgsConstructor;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import java.util.List;
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@Getter
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@NoArgsConstructor
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@AllArgsConstructor
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@Builder
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public class CommentReplyListResponse {
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private List<CommentSimple> replies;
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private PageInfo pageInfo;
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}

‎src/main/java/com/webservice/algorithmchef/dto/board/PageInfo.java‎

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package com.webservice.algorithmchef.dto.board;
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import lombok.AllArgsConstructor;
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import lombok.Builder;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import org.springframework.data.domain.Page;
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@Getter
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@NoArgsConstructor
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@AllArgsConstructor
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@Builder
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public class PageInfo {
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private int page;
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private int size;
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private long totalElements;
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private int totalPages;
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public static PageInfo from(Page<?> page) {
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return PageInfo.builder()
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.page(page.getNumber())
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.size(page.getSize())
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.totalElements(page.getTotalElements())
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.totalPages(page.getTotalPages())
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.build();
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}
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}

‎src/main/java/com/webservice/algorithmchef/repository/BoardCommentRepository.java‎

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package com.webservice.algorithmchef.repository;
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import com.webservice.algorithmchef.model.BoardComment;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.Pageable;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.data.jpa.repository.Query;
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import org.springframework.data.repository.query.Param;
@@ -22,15 +24,25 @@ public interface BoardCommentRepository extends JpaRepository<BoardComment, Long
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List<BoardComment> findByPost_PostIdOrderByCreatedAtAsc(Long postId);
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2426
/**
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* (선택 사항) 특정 게시글의 '최상위 댓글(부모가 없는 댓글)'만 조회합니다.
26-
* 대댓글을 지연 로딩(Lazy Loading)으로 가져오거나 페이징이 필요할 때 사용합니다.
27+
* 특정 게시글의 '최상위 댓글(부모가 없는 댓글)'만 페이징 조회합니다.
28+
* 게시글 상세 조회 시 댓글 목록 페이징에 사용됩니다.
2729
*/
28-
List<BoardComment> findByPost_PostIdAndParentCommentIsNullOrderByCreatedAtAsc(Long postId);
30+
Page<BoardComment> findByPost_PostIdAndParentCommentIsNull(Long postId, Pageable pageable);
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3032
/**
3133
* (성능 최적화용) 게시글의 댓글을 가져올 때 작성자(User) 정보까지 한 번에 가져옵니다 (Fetch Join).
3234
* N+1 문제를 방지하여 조회 성능을 높입니다.
3335
*/
3436
@Query("SELECT c FROM BoardComment c JOIN FETCH c.user WHERE c.post.postId = :postId ORDER BY c.createdAt ASC")
3537
List<BoardComment> findCommentsByPostIdWithUser(@Param("postId") Long postId);
38+
39+
/**
40+
* 특정 부모 댓글의 자식 댓글(대댓글)을 페이징하여 조회합니다.
41+
* 대댓글 더보기 기능 등에 사용됩니다.
42+
* * @param parentCommentId 부모 댓글 ID (CommentId)
43+
*
44+
* @param pageable 페이징 정보
45+
* @return 대댓글 Page 객체
46+
*/
47+
Page<BoardComment> findByParentComment_CommentId(Long parentCommentId, Pageable pageable);
3648
}

‎src/main/java/com/webservice/algorithmchef/repository/BoardPostRepository.java‎

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11
package com.webservice.algorithmchef.repository;
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33
import com.webservice.algorithmchef.model.BoardPost;
4+
import org.springframework.data.domain.Page;
5+
import org.springframework.data.domain.Pageable;
46
import org.springframework.data.jpa.repository.JpaRepository;
57
import org.springframework.stereotype.Repository;
68

7-
import java.util.List;
8-
99
@Repository
1010
public interface BoardPostRepository extends JpaRepository<BoardPost, Long> {
11+
// 카테고리 필터링 + 페이징
12+
Page<BoardPost> findByCategory(String category, Pageable pageable);
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12-
/**
13-
* 게시글 전체 목록을 작성일 기준 내림차순(최신순)으로 조회합니다.
14-
* 사용처: 게시판 메인 화면
15-
*/
16-
List<BoardPost> findAllByOrderByCreatedAtDesc();
17-
18-
/**
19-
* 특정 카테고리의 게시글 목록을 작성일 기준 내림차순으로 조회합니다.
20-
* 사용처: 카테고리별 필터링 (나눔, 질문 등)
21-
*/
22-
List<BoardPost> findByCategoryOrderByCreatedAtDesc(String category);
23-
24-
/**
25-
* 특정 사용자가 작성한 게시글 목록을 조회합니다.
26-
* 사용처: 마이페이지 - 내가 쓴 글
27-
*/
28-
List<BoardPost> findByUser_IdOrderByCreatedAtDesc(Long userId);
14+
// 전체 페이징 (필터 없을 때) - findAll(Pageable)은 JpaRepository에 기본 내장됨
2915
}

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