优化和完善批量删除动态功能

实现动态软删除，被删除的动态的状态将改为3，将动态关联的评论，点赞，收藏硬删除

src/main/java/com/bao/dating/controller/PostController.java

@@ -61,7 +61,7 @@ public class PostController {
     @PostMapping("/deletePost")
     public Result<String> deleteById(@RequestBody List<Long> postIds){
         int deletedCount = postService.deletePostById(postIds);
-        return Result.success(ResultCode.SUCCESS_DELETE, deletedCount > 0 ? "成功删除" : "删除失败，该动态不存在", null);
+        return Result.success(ResultCode.SUCCESS_DELETE, "成功删除" + deletedCount + "条动态", null);
     }
 
     /**

src/main/java/com/bao/dating/mapper/CommentsMapper.java

@@ -18,4 +18,11 @@ public interface CommentsMapper {
     // 根据动态ID查询评论列表
     @Select("SELECT * FROM comments WHERE post_id = #{post_id} ORDER BY created_at DESC")
     List<Comments> getCommentsByPostId(@Param("post_id") Long post_id);
+
+    /**
+     * 根据动态ID批量删除评论
+     * @param postIds
+     * @return
+     */
+    int deleteCommentsByPostIds(@Param("postIds") List<Long> postIds);
 }

src/main/java/com/bao/dating/mapper/PostFavoriteMapper.java

@@ -12,4 +12,12 @@ public interface PostFavoriteMapper {
     List<Long> selectUserIDByPostID(@Param("postId") Long postId);
     int addPostFavorite(PostFavorite postFavorite);
     int deletePostFavorite(@Param("postId") Long postId);
+
+    /**
+     * 批量删除收藏
+     * @param postIds
+     * @return
+     */
+    int deleteFavoritesByPostIds(@Param("postIds") List<Long> postIds);
+
 }

src/main/java/com/bao/dating/mapper/PostLikeMapper.java

@@ -4,6 +4,8 @@ import com.bao.dating.pojo.entity.PostLike;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 
+import java.util.List;
+
 @Mapper
 public interface PostLikeMapper {
     /**
@@ -31,4 +33,12 @@ public interface PostLikeMapper {
      * @return
      */
     int deleteByPostIdAndUserId(@Param("postId") Long postId, @Param("userId") Long userId);
+
+    /**
+     * 批量删除点赞记录
+     *
+     * @param postIds
+     * @return
+     */
+    int deleteLikesByPostIds(@Param("postIds") List<Long> postIds);
 }

src/main/java/com/bao/dating/mapper/PostMapper.java

@@ -21,11 +21,11 @@ public interface PostMapper {
     void insert(Post post);
 
     /**
-     * 根据ID删除动态
+     * 根据ID修改动态状态
      *
      * @param postIds 动态ID
      */
-    int deletePostByIds(List<Long> postIds);
+    int updatePublicById(@Param("postIds") List<Long> postIds,  @Param("userId") Long userId);
 
     /**
      * 根据ID查询动态

src/main/java/com/bao/dating/service/PostService.java

@@ -27,7 +27,7 @@ public interface PostService {
     Post createPost(PostRequestDTO postRequestDTO);
 
     /**
-     * 批量删除动态
+     * 批量删除动态（将动态状态改为已删除）
      * @param postIds 动态ID
      * @return 删除的动态对象
      */

src/main/java/com/bao/dating/service/impl/PostServiceImpl.java

@@ -4,17 +4,22 @@ import com.bao.dating.common.aliyun.GreenImageScan;
 import com.bao.dating.common.aliyun.GreenTextScan;
 import com.bao.dating.common.result.GreenAuditResult;
 import com.bao.dating.context.UserContext;
+import com.bao.dating.mapper.CommentsMapper;
+import com.bao.dating.mapper.PostFavoriteMapper;
+import com.bao.dating.mapper.PostLikeMapper;
 import com.bao.dating.mapper.PostMapper;
 import com.bao.dating.pojo.dto.PostRequestDTO;
 import com.bao.dating.pojo.entity.Post;
 import com.bao.dating.pojo.vo.PostEditVO;
 import com.bao.dating.service.PostService;
 import com.bao.dating.common.aliyun.AliOssUtil;
+import com.bao.dating.service.UserService;
 import com.bao.dating.util.FileUtil;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.CollectionUtils;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
@@ -43,6 +48,15 @@ public class PostServiceImpl implements PostService {
     @Autowired
     private PostMapper postMapper;
 
+    @Autowired
+    private PostLikeMapper postLikeMapper;
+
+    @Autowired
+    private PostFavoriteMapper postFavoriteMapper;
+
+    @Autowired
+    private CommentsMapper commentsMapper;
+
     /**
      * 上传媒体文件
      * @param files 媒体文件数组
@@ -177,7 +191,7 @@ public class PostServiceImpl implements PostService {
     }
 
     /**
-     * 批量删除动态
+     * 批量删除动态（将动态状态改为已删除）
      *
      * @param postIds 动态ID
      * @return 删除的动态对象
@@ -188,19 +202,21 @@ public class PostServiceImpl implements PostService {
         // 判断用户权限
         Long userId = UserContext.getUserId();
 
-        // 遍历所有要删除的帖子ID，验证权限
+        if (CollectionUtils.isEmpty(postIds)) {
-        for (Long postId : postIds) {
+            return 0;
-            Post post = postMapper.selectById(postId);
-            if (post == null) {
-                throw new RuntimeException("动态不存在");
-            }
-            // 验证用户权限
-            if (post.getUserId() == null || !post.getUserId().equals(userId)) {
-                throw new RuntimeException("无权限删除此动态");
-            }
         }
-        // 批量删除动态
+        int affected = postMapper.updatePublicById(postIds, userId);
-        return postMapper.deletePostByIds(postIds);
+
+        if (affected == 0) {
+            throw new RuntimeException("未删除任何动态，可能无权限或动态不存在");
+        }
+
+        // 删除动态下的评论、点赞、收藏
+        commentsMapper.deleteCommentsByPostIds(postIds);
+        postLikeMapper.deleteLikesByPostIds(postIds);
+        postFavoriteMapper.deleteFavoritesByPostIds(postIds);
+
+        return affected;
     }
 
     /**

src/main/resources/com/bao/dating/mapper/CommentsMapper.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.bao.dating.mapper.CommentsMapper">
+
+    <!-- 批量删除动态下的所有评论 -->
+    <delete id="deleteCommentsByPostIds">
+        DELETE FROM comments
+        WHERE post_id IN
+        <foreach collection="postIds" item="postId" open="(" close=")" separator=",">
+            #{postId}
+        </foreach>
+    </delete>
+
+</mapper>

src/main/resources/com/bao/dating/mapper/PostFavoriteMapper.xml

@@ -14,4 +14,14 @@
     <select id="selectUserIDByPostID" resultType="java.lang.Long">
         SELECT user_id FROM post_favorite WHERE post_id = #{postId}
     </select>
+
+    <!--批量删除动态收藏-->
+    <delete id="deleteFavoritesByPostIds">
+        DELETE FROM post_favorite
+        WHERE post_id IN
+        <foreach collection="postIds" item="postId" open="(" close=")" separator=",">
+            #{postId}
+        </foreach>
+    </delete>
+
 </mapper>

src/main/resources/com/bao/dating/mapper/PostLikeMapper.xml

@@ -14,4 +14,14 @@
     <delete id="deleteByPostIdAndUserId">
         delete from dating.post_like where post_id = #{postId} and user_id = #{userId}
     </delete>
+
+    <!--批量删除点赞记录-->
+    <delete id="deleteLikesByPostIds">
+        DELETE FROM post_like
+        WHERE post_id IN
+        <foreach collection="postIds" item="postId" open="(" close=")" separator=",">
+            #{postId}
+        </foreach>
+    </delete>
+
 </mapper>

src/main/resources/com/bao/dating/mapper/PostMapper.xml

@@ -28,25 +28,19 @@
          #{isPublic}, 0, 0, #{createdAt}, #{updatedAt})
     </insert>
 
-    <!--动态删除-->
+    <!--修改动态状态-->
-    <delete id="deletePostByIds">
+    <update id="updatePublicById">
-        DELETE FROM post WHERE post_id IN
+        UPDATE post
+        <set>
+            is_public = 3,
+            updated_at = NOW()
+        </set>
+        WHERE post_id IN
         <foreach item="postId" index="index" collection="postIds" separator="," open="(" close=")">
             #{postId}
         </foreach>
-    </delete>
+        AND user_id = #{userId}
-    <!--删除收藏记录-->
+    </update>
-    <delete id="1">
-        DELETE FROM post_favorite WHERE post_id = #{postId}
-    </delete>
-    <!--删除点赞记录-->
-    <delete id="2">
-        DELETE FROM post_like WHERE post_id = #{postId}
-    </delete>
-    <!--动态评论删除-->
-    <delete id="3">
-        DELETE FROM comments WHERE post_id = #{postId}
-    </delete>
 
     <!--动态查询-->
     <resultMap id="PostResultMap" type="com.bao.dating.pojo.entity.Post">