feat: 게시판 신고 — 누적 5건 시 블라인드(관리자만 열람)

- report 테이블(회원당 대상별 1회), comment.blocked 컬럼
- POST /board/posts|comments/{id}/report, 본인 글/댓글 신고 불가
- 글: 5건이면 blocked(기존 열람제한 재사용) / 댓글: blocked → 비관리자 본문 숨김
- 삭제·탈퇴 시 신고 정리

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/main/java/com/sb/web/auth/mapper/WithdrawMapper.java

@@ -27,7 +27,8 @@ public interface WithdrawMapper {
     int deletePostsByAuthor(@Param("memberId") Long memberId);
     int deleteBoardImagesByMember(@Param("memberId") Long memberId);
 
-    // 포인트 / 결제 / 세션
+    // 신고 / 포인트 / 결제 / 세션
+    int deleteReportsByMember(@Param("memberId") Long memberId);
     int deletePointHistory(@Param("memberId") Long memberId);
     int deleteIapPurchases(@Param("memberId") Long memberId);
     int deleteAuthSessions(@Param("memberId") Long memberId);

src/main/java/com/sb/web/auth/service/AuthService.java

@@ -324,7 +324,8 @@ public class AuthService {
         backupMapper.deleteCategories(memberId);
         backupMapper.deleteTags(memberId);
         backupMapper.deleteWallets(memberId);
-        // 3) 포인트 / 결제 / 세션
+        // 3) 신고 / 포인트 / 결제 / 세션
+        withdrawMapper.deleteReportsByMember(memberId);
         withdrawMapper.deletePointHistory(memberId);
         withdrawMapper.deleteIapPurchases(memberId);
         withdrawMapper.deleteAuthSessions(memberId);

src/main/java/com/sb/web/board/controller/BoardController.java

@@ -178,4 +178,22 @@ public class BoardController {
             @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
         return boardService.voteComment(commentId, req.getType(), current);
     }
+
+    /** 게시글 신고 (누적 5건 시 블라인드) */
+    @PostMapping("/posts/{id}/report")
+    public ResponseEntity<Void> reportPost(
+            @PathVariable Long id,
+            @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
+        boardService.reportPost(id, current);
+        return ResponseEntity.noContent().build();
+    }
+
+    /** 댓글 신고 (누적 5건 시 블라인드) */
+    @PostMapping("/comments/{commentId}/report")
+    public ResponseEntity<Void> reportComment(
+            @PathVariable Long commentId,
+            @RequestAttribute(AuthInterceptor.CURRENT_MEMBER) SessionUser current) {
+        boardService.reportComment(commentId, current);
+        return ResponseEntity.noContent().build();
+    }
 }

src/main/java/com/sb/web/board/domain/Comment.java

@@ -24,5 +24,6 @@ public class Comment implements Serializable {
     private String authorGooglePicture; // 조회 시 member JOIN (저장 안 함)
     private String authorProfileImage;  // 조회 시 member JOIN (저장 안 함)
     private String content;
+    private Boolean blocked;            // 신고 누적 블라인드
     private LocalDateTime createdAt;
 }

src/main/java/com/sb/web/board/dto/CommentResponse.java

@@ -24,6 +24,7 @@ public class CommentResponse {
     private Integer downCount; // 비추천 수
     private String myVote;     // 현재 사용자의 투표: UP / DOWN / null
     private Boolean hot;       // 인기 댓글(추천 50+ & 1일 이내) 상단 노출
+    private Boolean blocked;   // 신고 누적 블라인드(관리자만 본문 열람)
 
     public static CommentResponse from(Comment c) {
         return CommentResponse.builder()
@@ -33,6 +34,7 @@ public class CommentResponse {
                 .authorGooglePicture(c.getAuthorGooglePicture())
                 .authorProfileImage(c.getAuthorProfileImage())
                 .content(c.getContent())
+                .blocked(Boolean.TRUE.equals(c.getBlocked()))
                 .createdAt(c.getCreatedAt())
                 .upCount(0)
                 .downCount(0)

src/main/java/com/sb/web/board/mapper/CommentMapper.java

@@ -18,4 +18,7 @@ public interface CommentMapper {
     int delete(@Param("id") Long id);
 
     int deleteByPostId(@Param("postId") Long postId);
+
+    /** 신고 누적 블라인드 설정 */
+    int updateBlocked(@Param("id") Long id, @Param("blocked") boolean blocked);
 }

src/main/java/com/sb/web/board/mapper/ReportMapper.java

@@ -0,0 +1,23 @@
+package com.sb.web.board.mapper;
+
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+/**
+ * 신고(report) 매퍼 — 글/댓글 신고 누적 집계.
+ */
+@Mapper
+public interface ReportMapper {
+
+    /** 신고 추가 (회원당 대상별 1회 — 중복은 무시) */
+    int insertIgnore(@Param("targetType") String targetType,
+                     @Param("targetId") Long targetId,
+                     @Param("memberId") Long memberId,
+                     @Param("reason") String reason);
+
+    int countByTarget(@Param("targetType") String targetType, @Param("targetId") Long targetId);
+
+    int deleteByTarget(@Param("targetType") String targetType, @Param("targetId") Long targetId);
+
+    int deleteByMember(@Param("memberId") Long memberId);
+}

src/main/java/com/sb/web/board/service/BoardService.java

@@ -14,6 +14,7 @@ import com.sb.web.board.dto.Recommender;
 import com.sb.web.board.dto.VoteResponse;
 import com.sb.web.board.mapper.CommentMapper;
 import com.sb.web.board.mapper.PostMapper;
+import com.sb.web.board.mapper.ReportMapper;
 import com.sb.web.board.mapper.TagMapper;
 import com.sb.web.board.mapper.VoteMapper;
 import com.sb.web.common.exception.ApiException;
@@ -41,6 +42,7 @@ public class BoardService {
     private final TagMapper tagMapper;
     private final CommentMapper commentMapper;
     private final VoteMapper voteMapper;
+    private final ReportMapper reportMapper;
     private final PointService pointService;
     private final RedisTemplate<String, Object> redisTemplate;
 
@@ -48,6 +50,10 @@ public class BoardService {
     private static final Duration VIEW_DEDUP_TTL = Duration.ofHours(24);
     private static final String UP = "UP";
     private static final String DOWN = "DOWN";
+    private static final String T_POST = "POST";
+    private static final String T_COMMENT = "COMMENT";
+    /** 신고 누적 블라인드 임계 */
+    private static final int REPORT_BLIND_THRESHOLD = 5;
 
     // 인기 글/댓글: 등록 1일 이내 + 추천 50건 이상이면 상단에 최대 3건 노출
     private static final int HOT_WITHIN_HOURS = 24;
@@ -185,6 +191,7 @@ public class BoardService {
         // 투표 정리(댓글 투표는 댓글 삭제 전에 — 서브쿼리가 comment 참조)
         voteMapper.deleteCommentVotesByPost(id);
         voteMapper.deletePostVotesByPost(id);
+        reportMapper.deleteByTarget(T_POST, id);
         tagMapper.deletePostTagsByPostId(id);
         commentMapper.deleteByPostId(id);
         postMapper.delete(id);
@@ -217,9 +224,43 @@ public class BoardService {
         }
         assertCanModify(comment.getAuthorId(), user);
         voteMapper.deleteCommentVotesByComment(commentId);
+        reportMapper.deleteByTarget(T_COMMENT, commentId);
         commentMapper.delete(commentId);
     }
 
+    /* ===================== 신고 ===================== */
+
+    /** 게시글 신고 — 회원당 1회, 누적 5건이면 블라인드(관리자만 열람) */
+    @Transactional
+    public void reportPost(Long postId, SessionUser user) {
+        Post post = mustFindPost(postId);
+        if (post.getAuthorId().equals(user.getId())) {
+            throw new ApiException(HttpStatus.BAD_REQUEST, "본인 글은 신고할 수 없습니다.");
+        }
+        reportMapper.insertIgnore(T_POST, postId, user.getId(), null);
+        if (!Boolean.TRUE.equals(post.getBlocked())
+                && reportMapper.countByTarget(T_POST, postId) >= REPORT_BLIND_THRESHOLD) {
+            postMapper.updateBlocked(postId, true, "신고 누적으로 블라인드되었습니다.");
+        }
+    }
+
+    /** 댓글 신고 — 회원당 1회, 누적 5건이면 블라인드(관리자만 열람) */
+    @Transactional
+    public void reportComment(Long commentId, SessionUser user) {
+        Comment comment = commentMapper.findById(commentId);
+        if (comment == null) {
+            throw new ApiException(HttpStatus.NOT_FOUND, "댓글을 찾을 수 없습니다.");
+        }
+        if (comment.getAuthorId().equals(user.getId())) {
+            throw new ApiException(HttpStatus.BAD_REQUEST, "본인 댓글은 신고할 수 없습니다.");
+        }
+        reportMapper.insertIgnore(T_COMMENT, commentId, user.getId(), null);
+        if (!Boolean.TRUE.equals(comment.getBlocked())
+                && reportMapper.countByTarget(T_COMMENT, commentId) >= REPORT_BLIND_THRESHOLD) {
+            commentMapper.updateBlocked(commentId, true);
+        }
+    }
+
     /* ===================== 추천/비추천 ===================== */
 
     /** 게시글 추천/비추천 토글. 같은 표 재요청 시 취소, 반대면 전환. */
@@ -301,6 +342,13 @@ public class BoardService {
             }
             return cr;
         }).toList());
+        // 신고 누적 블라인드 댓글: 관리자가 아니면 본문 숨김
+        boolean viewerAdmin = isAdmin(viewer);
+        if (!viewerAdmin) {
+            comments.forEach(cr -> {
+                if (Boolean.TRUE.equals(cr.getBlocked())) cr.setContent(null);
+            });
+        }
         comments = orderWithHot(comments);
 
         PostDetail detail = PostDetail.of(post, tags, comments);

src/main/resources/db/board.sql

@@ -95,6 +95,22 @@ CREATE TABLE IF NOT EXISTS comment (
     KEY idx_comment_post (post_id)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
+-- 댓글 신고 누적 블라인드 플래그 (멱등)
+ALTER TABLE comment ADD COLUMN IF NOT EXISTS blocked TINYINT(1) NOT NULL DEFAULT 0 COMMENT '신고 누적 블라인드';
+
+-- 신고 (글/댓글). 회원당 대상별 1회. 5건 누적 시 블라인드(관리자만 열람).
+CREATE TABLE IF NOT EXISTS report (
+    id          BIGINT       NOT NULL AUTO_INCREMENT,
+    target_type VARCHAR(10)  NOT NULL COMMENT 'POST / COMMENT',
+    target_id   BIGINT       NOT NULL,
+    member_id   BIGINT       NOT NULL COMMENT '신고자',
+    reason      VARCHAR(255) NULL,
+    created_at  DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (id),
+    UNIQUE KEY uk_report (target_type, target_id, member_id),
+    KEY idx_report_target (target_type, target_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
 -- 게시글 추천/비추천 (회원당 1표, UP/DOWN). 같은 표 재요청 시 취소, 반대면 전환.
 CREATE TABLE IF NOT EXISTS post_vote (
     post_id    BIGINT     NOT NULL,

src/main/resources/mapper/CommentMapper.xml

@@ -11,11 +11,12 @@
         <result property="authorGooglePicture" column="author_google_picture"/>
         <result property="authorProfileImage" column="author_profile_image"/>
         <result property="content" column="content"/>
+        <result property="blocked" column="blocked"/>
         <result property="createdAt" column="created_at"/>
     </resultMap>
 
     <select id="findByPostId" parameterType="long" resultMap="commentResultMap">
-        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.created_at,
+        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.blocked, c.created_at,
                m.google_picture AS author_google_picture, m.profile_image AS author_profile_image
         FROM comment c
         LEFT JOIN member m ON m.id = c.author_id
@@ -24,13 +25,17 @@
     </select>
 
     <select id="findById" parameterType="long" resultMap="commentResultMap">
-        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.created_at,
+        SELECT c.id, c.post_id, c.author_id, c.author_name, c.content, c.blocked, c.created_at,
                m.google_picture AS author_google_picture, m.profile_image AS author_profile_image
         FROM comment c
         LEFT JOIN member m ON m.id = c.author_id
         WHERE c.id = #{id}
     </select>
 
+    <update id="updateBlocked">
+        UPDATE comment SET blocked = #{blocked} WHERE id = #{id}
+    </update>
+
     <insert id="insert" parameterType="com.sb.web.board.domain.Comment"
             useGeneratedKeys="true" keyProperty="id">
         INSERT INTO comment (post_id, author_id, author_name, content, created_at)

src/main/resources/mapper/ReportMapper.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.sb.web.board.mapper.ReportMapper">
+
+    <insert id="insertIgnore">
+        INSERT IGNORE INTO report (target_type, target_id, member_id, reason, created_at)
+        VALUES (#{targetType}, #{targetId}, #{memberId}, #{reason}, NOW())
+    </insert>
+
+    <select id="countByTarget" resultType="int">
+        SELECT COUNT(*) FROM report WHERE target_type = #{targetType} AND target_id = #{targetId}
+    </select>
+
+    <delete id="deleteByTarget">
+        DELETE FROM report WHERE target_type = #{targetType} AND target_id = #{targetId}
+    </delete>
+
+    <delete id="deleteByMember">
+        DELETE FROM report WHERE member_id = #{memberId}
+    </delete>
+
+</mapper>

src/main/resources/mapper/WithdrawMapper.xml

@@ -52,7 +52,10 @@
         DELETE FROM board_image WHERE member_id = #{memberId}
     </delete>
 
-    <!-- 포인트 / 결제 / 세션 -->
+    <!-- 신고 / 포인트 / 결제 / 세션 -->
+    <delete id="deleteReportsByMember">
+        DELETE FROM report WHERE member_id = #{memberId}
+    </delete>
     <delete id="deletePointHistory">
         DELETE FROM point_history WHERE member_id = #{memberId}
     </delete>