删除评论

src/main/java/cn/meteor/beyondclouds/modules/question/api/QuestionReplyCommentApi.java

@@ -30,6 +30,14 @@ public class QuestionReplyCommentApi {
         this.questionReplyCommentService = questionReplyCommentService;
     }
 
+    /**
+     * 发表评论
+     * @param questionReplyCommentForm 评论表单
+     * @param bindingResult 校验信息
+     * @param replyId 回复ID
+     * @param subject 访问者信息
+     * @return default
+     */
     @ApiOperation("发表评论")
     @PostMapping("/question/reply/{replyId}/comment")
     public Response publishReplyComment(@RequestBody @Valid QuestionReplyCommentForm questionReplyCommentForm, BindingResult bindingResult,
@@ -47,4 +55,22 @@ public class QuestionReplyCommentApi {
             return Response.error(e);
         }
     }
+
+    /**
+     * 删除评论
+     * @param commentId 评论ID
+     * @param subject 访问者信息
+     * @return default
+     */
+    @ApiOperation("删除评论")
+    @DeleteMapping("/question/reply/comment/{commentId}")
+    public Response deleteReplyComment(@PathVariable("commentId") String commentId, @CurrentSubject Subject subject) {
+        try {
+            questionReplyCommentService.deleteReplyComment((String) subject.getId(), commentId);
+            return Response.success();
+        } catch (QuestionReplyCommentServiceException e) {
+            e.printStackTrace();
+            return Response.error(e);
+        }
+    }
 }

src/main/java/cn/meteor/beyondclouds/modules/question/enums/QuestionReplyCommentErrorCode.java

@@ -7,7 +7,18 @@ import cn.meteor.beyondclouds.core.IErrorCode;
  * @since 2020/2/2
  */
 public enum QuestionReplyCommentErrorCode implements IErrorCode {
-    COMMENT_NOT_FOUND(5001, "父评论不存在");
+    /**
+     * 评论不存在
+     */
+    COMMENT_NOT_FOUND(5002, "该评论不存在"),
+    /**
+     * 父评论不存在
+     */
+    PARENT_COMMENT_NOT_FOUND(5001, "父评论不存在"),
+    /**
+     * 无权删除评论
+     */
+    NO_DELETE_PRIVILEGES(5003,"无权删除该评论 ");
 
     private long code;
     private String msg;

src/main/java/cn/meteor/beyondclouds/modules/question/service/IQuestionReplyCommentService.java

@@ -23,4 +23,12 @@ public interface IQuestionReplyCommentService extends IService<QuestionReplyComm
      * @throws QuestionReplyCommentServiceException 问题回复评论业务异常
      */
     void publishReplyComment(String userId, String replyId, String parentId, String comment) throws QuestionReplyCommentServiceException;
+
+    /**
+     * 删除评论
+     * @param userId 用户ID
+     * @param commentId 评论ID
+     * @throws QuestionReplyCommentServiceException 问题回复评论业务异常
+     */
+    void deleteReplyComment(String userId, String commentId) throws QuestionReplyCommentServiceException;
 }

src/main/java/cn/meteor/beyondclouds/modules/question/service/impl/QuestionReplyCommentServiceImpl.java

 package cn.meteor.beyondclouds.modules.question.service.impl;
 
+import cn.meteor.beyondclouds.modules.question.entity.Question;
 import cn.meteor.beyondclouds.modules.question.entity.QuestionReply;
 import cn.meteor.beyondclouds.modules.question.entity.QuestionReplyComment;
 import cn.meteor.beyondclouds.modules.question.enums.QuestionReplyCommentErrorCode;
@@ -8,6 +9,7 @@ import cn.meteor.beyondclouds.modules.question.exception.QuestionReplyCommentSer
 import cn.meteor.beyondclouds.modules.question.mapper.QuestionReplyCommentMapper;
 import cn.meteor.beyondclouds.modules.question.service.IQuestionReplyCommentService;
 import cn.meteor.beyondclouds.modules.question.service.IQuestionReplyService;
+import cn.meteor.beyondclouds.modules.question.service.IQuestionService;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -26,6 +28,8 @@ import org.springframework.util.StringUtils;
 @Service
 public class QuestionReplyCommentServiceImpl extends ServiceImpl<QuestionReplyCommentMapper, QuestionReplyComment> implements IQuestionReplyCommentService {
 
+    private IQuestionService questionService;
+
     private IQuestionReplyService questionReplyService;
 
     @Autowired
@@ -33,9 +37,15 @@ public class QuestionReplyCommentServiceImpl extends ServiceImpl<QuestionReplyCo
         this.questionReplyService = questionReplyService;
     }
 
+    @Autowired
+    public void setQuestionService(IQuestionService questionService) {
+        this.questionService = questionService;
+    }
+
     @Override
     public void publishReplyComment(String userId, String replyId, String parentId, String comment) throws QuestionReplyCommentServiceException {
-        Assert.hasText(replyId, "replyId must not be empty");
+        Assert.notNull(replyId, "replyId must not be null");
+        Assert.hasText(comment, "comment must not be empty");
 
         //1.判断是否存在该回复
         QuestionReply questionReply = questionReplyService.getById(replyId);
@@ -54,7 +64,7 @@ public class QuestionReplyCommentServiceImpl extends ServiceImpl<QuestionReplyCo
             parentQuestionReplyComment = getOne(questionReplyCommentQueryWrapper);
             //若父评论为空，则抛出父评论不存在异常
             if (null == parentQuestionReplyComment) {
-                throw  new QuestionReplyCommentServiceException(QuestionReplyCommentErrorCode.COMMENT_NOT_FOUND);
+                throw  new QuestionReplyCommentServiceException(QuestionReplyCommentErrorCode.PARENT_COMMENT_NOT_FOUND);
             }
          }
 
@@ -78,4 +88,37 @@ public class QuestionReplyCommentServiceImpl extends ServiceImpl<QuestionReplyCo
         }
         updateById(questionReplyComment);
     }
+
+    @Override
+    public void deleteReplyComment(String userId, String commentId) throws QuestionReplyCommentServiceException {
+        Assert.notNull(commentId, "commentId must not be null");
+        Assert.notNull(userId, "userId must not be null");
+
+        //1.判断是否存在该评论
+        QuestionReplyComment questionReplyComment = getById(commentId);
+        if (null == questionReplyComment) {
+            throw new QuestionReplyCommentServiceException(QuestionReplyCommentErrorCode.COMMENT_NOT_FOUND);
+        }
+
+        //2.判断用户是否有权限删除该评论
+        if (!questionReplyComment.getUserId().equals(userId)) {
+            //用户未发表过该评论，判断用户是否为该回复或者该问题的发布者
+
+            //得到评论对应的回复对象
+            QuestionReply questionReply = questionReplyService.getById(questionReplyComment.getReplyId());
+
+            //得到回复对应的问题对象
+            Question question = questionService.getById(questionReply.getQuestionId());
+
+            //判断用户是否为该回复或该问题的发布者
+            if (!question.getUserId().equals(userId) && !questionReply.getUserId().equals(userId)) {
+                throw new QuestionReplyCommentServiceException(QuestionReplyCommentErrorCode.NO_DELETE_PRIVILEGES);
+            }
+        }
+
+        //3.删除评论及其子评论
+        QueryWrapper<QuestionReplyComment> questionReplyCommentQueryWrapper = new QueryWrapper<>();
+        questionReplyCommentQueryWrapper.like("thread",questionReplyComment.getThread());
+        remove(questionReplyCommentQueryWrapper);
+    }
 }