完成评论删除和评论字数长度校验

my-project-backend/src/main/java/com/example/controller/ForumController.java

@@ -106,4 +106,11 @@ public class ForumController {
                                               @RequestParam @Min(0) int page) {
         return RestBean.success(topicService.comments(tid, page + 1));
     }
+
+    @GetMapping("/delete-comment")
+    public RestBean<Void> deleteComment(@RequestParam @Min(0) int id,
+                                              @RequestAttribute(Const.ATTR_USER_ID) int uid) {
+        topicService.deleteComment(id, uid);
+        return RestBean.success();
+    }
 }

my-project-backend/src/main/java/com/example/service/TopicService.java

@@ -24,5 +24,6 @@ public interface TopicService extends IService<Topic> {
     void interact(Interact interact, boolean state);
     List<TopicPreviewVO> listCollectTopic(int uid);
     String createComment(AddCommentVO vo, int uid);
+    void deleteComment(int id, int uid);
     List<CommentVO> comments(int tid, int pageNumber);
 }

my-project-backend/src/main/java/com/example/service/impl/TopicServiceImpl.java

@@ -74,7 +74,7 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
 
     @Override
     public String createTopic(int uid, TopicCreateVO vo) {
-        if(!this.textLimitCheck(vo.getContent()))
+        if(!this.textLimitCheck(vo.getContent(), 20000))
             return "文章长度过大，发文失败！";
         String key = Const.FORUM_TOPIC_CREATE_COUNTER + uid;
         if(!flowUtils.limitPeriodCounterCheck(key, 3, 3600))
@@ -161,6 +161,8 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
 
     @Override
     public String createComment(AddCommentVO vo, int uid) {
+        if(!this.textLimitCheck(JSONObject.parseObject(vo.getContent()), 2000))
+            return "评论长度过大，发表失败！";
         String key = Const.FORUM_TOPIC_COMMENT_COUNTER + uid;
         if(!flowUtils.limitPeriodCounterCheck(key, 2, 60))
             return "发表评论频繁，请稍后再试!";
@@ -172,6 +174,14 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
         return null;
     }
 
+    @Override
+    public void deleteComment(int id, int uid) {
+        commentMapper.delete(Wrappers.<TopicComment>query()
+                .eq("id", id)
+                .eq("uid", uid)
+        );
+    }
+
     @Override
     public List<CommentVO> comments(int tid, int pageNumber) {
         Page<TopicComment> comments = Page.of(pageNumber, 10);
@@ -279,12 +289,12 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
         }
     }
 
-    private boolean textLimitCheck(JSONObject object) {
+    private boolean textLimitCheck(JSONObject object, int limit) {
         if(object == null) return false;
         long length = 0;
         for (Object op : object.getJSONArray("ops")) {
             length += JSONObject.from(op).getString("insert").length();
         }
-        return length <= 20000;
+        return length <= limit;
     }
 }

my-project-frontend/src/components/TopicCommentEditor.vue

@@ -19,6 +19,10 @@ function init() {
 }
 
 function submitComment() {
+    if(deltaToText(content).length > 2000) {
+        ElMessage.warning('评论字数长度已经超出最大限制，请缩减评论内容！')
+        return
+    }
     post('/api/forum/add-comment', {
         tid: props.tid,
         content: JSON.stringify(content.value),
@@ -29,11 +33,17 @@ function submitComment() {
     })
 }
 
-function deltaToSimpleText(delta) {
+function deltaToText(delta) {
+    if(!delta?.ops) return ""
     let str = ''
-    for (let op of JSON.parse(delta).ops) {
-        str += op.insert
+    for (let ops of delta.ops) {
+        str += ops.insert
     }
+    return str.replace(/\s/g, "")
+}
+
+function deltaToSimpleText(delta) {
+    let str = deltaToText(JSON.parse(delta))
     if(str.length > 35) str = str.substring(0, 35) + "..."
     return str
 }
@@ -52,7 +62,10 @@ function deltaToSimpleText(delta) {
                     <quill-editor style="height: 100px" v-model:content="content"
                                   placeholder="请发表友善的评论，不要使用脏话骂人，都是大学生素质高一点"/>
                 </div>
-                <div style="margin-top: 10px;text-align: right">
+                <div style="margin-top: 10px;display: flex">
+                    <div style="flex: 1;font-size: 13px;color: grey">
+                        字数统计: {{deltaToText(content).length}}（最大支持2000字）
+                    </div>
                     <el-button @click="submitComment" type="success" plain>发表评论</el-button>
                 </div>
             </div>

my-project-frontend/src/views/forum/TopicDetail.vue

@@ -77,6 +77,13 @@ function loadComments(page){
     topic.page = page + 1
     get(`/api/forum/comments?tid=${tid}&page=${page}`, data => topic.comments = data)
 }
+
+function deleteComment(id) {
+    get(`/api/forum/delete-comment?id=${id}`, () => {
+        ElMessage.success('删除评论成功！')
+        loadComments(topic.page - 1)
+    })
+}
 </script>
 
 <template>
@@ -176,6 +183,7 @@ function loadComments(page){
                             <el-link :icon="ChatSquare" @click="comment.show = true;comment.quote = item"
                                      type="info">&nbsp;回复评论</el-link>
                             <el-link :icon="Delete" type="danger" v-if="item.user.id === store.user.id"
+                                     @click="deleteComment(item.id)"
                                      style="margin-left: 20px">&nbsp;删除评论</el-link>
                         </div>
                     </div>
@@ -194,7 +202,7 @@ function loadComments(page){
                       :submit="updateTopic"/>
         <topic-comment-editor :show="comment.show" @close="comment.show = false"
                               :quote="comment.quote" :tid="tid"
-                              @comment="comment.show = false;loadComments(Math.min(1, Math.ceil(topic.data.commentCount / 10)))"/>
+                              @comment="comment.show = false;loadComments(Math.ceil(topic.data.commentCount / 10) - 1)"/>
         <div class="add-comment" @click="comment.show = true">
             <el-icon><Plus /></el-icon>
         </div>