feat: add mermaid support to markdown

解决文章和草稿长度不够的问题

README.md

@@ -1,9 +1,9 @@
 <p align="center">
-  <BaseImage alt="OpenIsle" src="https://openisle-1307107697.cos.ap-guangzhou.myqcloud.com/assert/image.png" width="200">
+  <img alt="OpenIsle" src="https://openisle-1307107697.cos.ap-guangzhou.myqcloud.com/assert/image.png" width="200">
   <br>
   高效的开源社区前后端平台
   <br><br><br>
-  <BaseImage alt="Image" src="https://openisle-1307107697.cos.accelerate.myqcloud.com/dynamic_assert/22752cfac5a04a9c90c41995b9f55fed.png" width="1200">
+  <img alt="Image" src="https://openisle-1307107697.cos.accelerate.myqcloud.com/dynamic_assert/22752cfac5a04a9c90c41995b9f55fed.png" width="1200">
 </p>
 
 ## 💡 简介

backend/src/main/java/com/openisle/controller/ReactionController.java

@@ -36,6 +36,7 @@ public class ReactionController {
                                                    Authentication auth) {
         Reaction reaction = reactionService.reactToPost(auth.getName(), postId, req.getType());
         if (reaction == null) {
+            pointService.deductForReactionOfPost(auth.getName(), postId);
             return ResponseEntity.noContent().build();
         }
         ReactionDto dto = reactionMapper.toDto(reaction);
@@ -50,6 +51,7 @@ public class ReactionController {
                                                       Authentication auth) {
         Reaction reaction = reactionService.reactToComment(auth.getName(), commentId, req.getType());
         if (reaction == null) {
+            pointService.deductForReactionOfComment(auth.getName(), commentId);
             return ResponseEntity.noContent().build();
         }
         ReactionDto dto = reactionMapper.toDto(reaction);

backend/src/main/java/com/openisle/model/Draft.java

@@ -22,7 +22,7 @@ public class Draft {
 
     private String title;
 
-    @Column(columnDefinition = "TEXT")
+    @Column(columnDefinition = "LONGTEXT")
     private String content;
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false)

backend/src/main/java/com/openisle/model/PointHistoryType.java

@@ -5,6 +5,8 @@ public enum PointHistoryType {
     COMMENT,
     POST_LIKED,
     COMMENT_LIKED,
+    POST_LIKE_CANCELLED,
+    COMMENT_LIKE_CANCELLED,
     INVITE,
     FEATURE,
     SYSTEM_ONLINE,

backend/src/main/java/com/openisle/model/Post.java

@@ -31,7 +31,7 @@ public class Post {
     @Column(nullable = false)
     private String title;
 
-    @Column(nullable = false, columnDefinition = "TEXT")
+    @Column(nullable = false, columnDefinition = "LONGTEXT")
     private String content;
 
     @CreationTimestamp

backend/src/main/java/com/openisle/repository/NotificationRepository.java

@@ -5,6 +5,7 @@ import com.openisle.model.User;
 import com.openisle.model.Post;
 import com.openisle.model.Comment;
 import com.openisle.model.NotificationType;
+import com.openisle.model.ReactionType;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
@@ -29,4 +30,8 @@ public interface NotificationRepository extends JpaRepository<Notification, Long
     List<Notification> findByTypeAndFromUser(NotificationType type, User fromUser);
 
     void deleteByTypeAndFromUserAndPost(NotificationType type, User fromUser, Post post);
+
+    void deleteByTypeAndFromUserAndPostAndReactionType(NotificationType type, User fromUser, Post post, ReactionType reactionType);
+
+    void deleteByTypeAndFromUserAndCommentAndReactionType(NotificationType type, User fromUser, Comment comment, ReactionType reactionType);
 }

backend/src/main/java/com/openisle/service/NotificationService.java

@@ -114,6 +114,14 @@ public class NotificationService {
         return n;
     }
 
+    public void deleteReactionNotification(User fromUser, Post post, Comment comment, ReactionType reactionType) {
+        if (post != null) {
+            notificationRepository.deleteByTypeAndFromUserAndPostAndReactionType(NotificationType.REACTION, fromUser, post, reactionType);
+        } else if (comment != null) {
+            notificationRepository.deleteByTypeAndFromUserAndCommentAndReactionType(NotificationType.REACTION, fromUser, comment, reactionType);
+        }
+    }
+
     /**
      * Create notifications for all admins when a user submits a register request.
      * Old register request notifications from the same applicant are removed first.

backend/src/main/java/com/openisle/service/PointService.java

@@ -150,6 +150,16 @@ public class PointService {
         return addPoint(poster, 10, PointHistoryType.POST_LIKED, post, null, reactioner);
     }
 
+    public int deductForReactionOfPost(String reactionerName, Long postId) {
+        User poster = postRepository.findById(postId).orElseThrow().getAuthor();
+        User reactioner = userRepository.findByUsername(reactionerName).orElseThrow();
+        if (poster.getId().equals(reactioner.getId())) {
+            return 0;
+        }
+        Post post = postRepository.findById(postId).orElseThrow();
+        return addPoint(poster, -10, PointHistoryType.POST_LIKE_CANCELLED, post, null, reactioner);
+    }
+
     // 考虑点赞者和评论者是同一个的情况
     public int awardForReactionOfComment(String reactionerName, Long commentId) {
         // 根据帖子id找到评论者
@@ -169,6 +179,17 @@ public class PointService {
         return addPoint(commenter, 10, PointHistoryType.COMMENT_LIKED, post, comment, reactioner);
     }
 
+    public int deductForReactionOfComment(String reactionerName, Long commentId) {
+        User commenter = commentRepository.findById(commentId).orElseThrow().getAuthor();
+        User reactioner = userRepository.findByUsername(reactionerName).orElseThrow();
+        if (commenter.getId().equals(reactioner.getId())) {
+            return 0;
+        }
+        Comment comment = commentRepository.findById(commentId).orElseThrow();
+        Post post = comment.getPost();
+        return addPoint(commenter, -10, PointHistoryType.COMMENT_LIKE_CANCELLED, post, comment, reactioner);
+    }
+
     public java.util.List<PointHistory> listHistory(String userName) {
         User user = userRepository.findByUsername(userName).orElseThrow();
         if (pointHistoryRepository.countByUser(user) == 0) {

backend/src/main/java/com/openisle/service/ReactionService.java

@@ -42,6 +42,7 @@ public class ReactionService {
         java.util.Optional<Reaction> existing =
                 reactionRepository.findByUserAndPostAndType(user, post, type);
         if (existing.isPresent()) {
+            notificationService.deleteReactionNotification(user, post, null, type);
             reactionRepository.delete(existing.get());
             return null;
         }
@@ -65,6 +66,7 @@ public class ReactionService {
         java.util.Optional<Reaction> existing =
                 reactionRepository.findByUserAndCommentAndType(user, comment, type);
         if (existing.isPresent()) {
+            notificationService.deleteReactionNotification(user, null, comment, type);
             reactionRepository.delete(existing.get());
             return null;
         }

frontend_nuxt/app.vue

@@ -138,7 +138,7 @@ const goToNewPost = () => {
   height: 60px;
   border-radius: 50%;
   position: fixed;
-  bottom: 40px;
+  bottom: 70px;
   right: 20px;
   font-size: 20px;
   cursor: pointer;

frontend_nuxt/assets/global.css

@@ -162,6 +162,7 @@ body {
   border-radius: 4px;
   line-height: 1.5;
   position: relative;
+  white-space: break-spaces;
 }
 
 .info-content-text pre .line-numbers {
@@ -188,7 +189,6 @@ body {
   font-family: 'Maple Mono', monospace;
   font-size: 13px;
   border-radius: 4px;
-  white-space: break-spaces;
   background-color: var(--code-highlight-background-color);
   color: var(--text-color);
 }

frontend_nuxt/components/AvatarCropper.vue

@@ -2,7 +2,7 @@
   <div v-if="show" class="cropper-modal">
     <div class="cropper-body">
       <div class="cropper-wrapper">
-        <BaseImage ref="image" :src="src" alt="to crop" />
+        <img ref="image" :src="src" alt="to crop" />
       </div>
       <div class="cropper-actions">
         <button class="cropper-btn" @click="$emit('close')">取消</button>

frontend_nuxt/components/HeaderComponent.vue

@@ -63,7 +63,7 @@
           <DropdownMenu v-if="isLogin" ref="userMenu" :items="headerMenuItems">
             <template #trigger>
               <div class="avatar-container">
-                <BaseImage class="avatar-img" :src="avatar" alt="avatar" />
+                <img class="avatar-img" :src="avatar" alt="avatar" />
                 <i class="fas fa-caret-down dropdown-icon"></i>
               </div>
             </template>

frontend_nuxt/components/MessageFloatWindow.vue

@@ -16,6 +16,7 @@
         @click="reboundToDefault"
       ></i>
       <i class="fas fa-expand" title="在页面中打开" @click="expand"></i>
+      <i class="fas fa-times" title="关闭" @click="close"></i>
     </div>
   </div>
 </template>
@@ -48,6 +49,10 @@ function expand() {
   navigateTo(target)
 }
 
+function close() {
+  floatRoute.value = null
+}
+
 function injectBaseTag() {
   if (!iframeRef.value) return
 

frontend_nuxt/package.json

@@ -17,6 +17,7 @@
     "highlight.js": "^11.11.1",
     "ldrs": "^1.0.0",
     "markdown-it": "^14.1.0",
+    "mermaid": "^10.9.4",
     "nprogress": "^0.2.0",
     "nuxt": "latest",
     "sanitize-html": "^2.17.0",

frontend_nuxt/pages/message-box/[id].vue

@@ -113,17 +113,23 @@ const error = ref(null)
 const conversationId = route.params.id
 const currentUser = ref(null)
 const messagesListEl = ref(null)
-let lastMessageEl = null
 const currentPage = ref(0)
 const totalPages = ref(0)
 const loadingMore = ref(false)
-let scrollInterval = null
 const conversationName = ref('')
 const isChannel = ref(false)
 const isFloatMode = computed(() => route.query.float !== undefined)
 const floatRoute = useState('messageFloatRoute')
 const replyTo = ref(null)
 
+const isUserNearBottom = ref(true)
+function updateNearBottom() {
+  const el = messagesListEl.value
+  if (!el) return
+  const threshold = 40 // px
+  isUserNearBottom.value = el.scrollHeight - el.scrollTop - el.clientHeight <= threshold
+}
+
 const hasMoreMessages = computed(() => currentPage.value < totalPages.value - 1)
 
 const otherParticipant = computed(() => {
@@ -133,20 +139,37 @@ const otherParticipant = computed(() => {
   return participants.value.find((p) => p.id !== currentUser.value.id)
 })
 
-function isSentByCurrentUser(message) {
-  return message.sender.id === currentUser.value?.id
-}
-
-function handleAvatarError(event) {
-  event.target.src = '/default-avatar.svg'
-}
-
 function setReply(message) {
   replyTo.value = message
 }
 
-// No changes needed here, as renderMarkdown is now imported.
+/** 改造：滚动函数 —— smooth & instant */
-// The old function is removed.
+function scrollToBottomSmooth() {
+  const el = messagesListEl.value
+  if (!el) return
+  // 优先使用原生 smooth，失败则降级
+  try {
+    el.scrollTo({ top: el.scrollHeight, behavior: 'smooth' })
+  } catch {
+    // 降级：简易动画
+    const start = el.scrollTop
+    const end = el.scrollHeight
+    const duration = 200
+    const startTs = performance.now()
+    function step(now) {
+      const p = Math.min(1, (now - startTs) / duration)
+      el.scrollTop = start + (end - start) * p
+      if (p < 1) requestAnimationFrame(step)
+    }
+    requestAnimationFrame(step)
+  }
+}
+
+function scrollToBottomInstant() {
+  const el = messagesListEl.value
+  if (!el) return
+  el.scrollTop = el.scrollHeight
+}
 
 async function fetchMessages(page = 0) {
   if (page === 0) {
@@ -181,7 +204,6 @@ async function fetchMessages(page = 0) {
       isChannel.value = conversationData.channel
     }
 
-    // Since the backend sorts by descending, we need to reverse for correct chat order
     const newMessages = pageData.content.reverse().map((item) => ({
       ...item,
       src: item.sender.avatar,
@@ -202,12 +224,16 @@ async function fetchMessages(page = 0) {
     currentPage.value = pageData.number
     totalPages.value = pageData.totalPages
 
-    // Scrolling is now fully handled by the watcher
     await nextTick()
     if (page > 0 && list) {
+      // 加载更多：保持原视口位置
       const newScrollHeight = list.scrollHeight
       list.scrollTop = newScrollHeight - oldScrollHeight
+    } else if (page === 0) {
+      // 首次加载：定位到底部（不用动画，避免“闪动感”）
+      scrollToBottomInstant()
     }
+    updateNearBottom()
   } catch (e) {
     error.value = e.message
     toast.error(e.message)
@@ -272,9 +298,10 @@ async function sendMessage(content, clearInput) {
     })
     clearInput()
     replyTo.value = null
-    setTimeout(() => {
+
-      scrollToBottom()
+    await nextTick()
-    }, 100)
+    // 仅“发送消息成功后”才平滑滚动到底部
+    scrollToBottomSmooth()
   } catch (e) {
     toast.error(e.message)
   } finally {
@@ -290,7 +317,6 @@ async function markConversationAsRead() {
       method: 'POST',
       headers: { Authorization: `Bearer ${token}` },
     })
-    // After marking as read, refresh the global unread count
     refreshGlobalUnreadCount()
     refreshChannelUnread()
   } catch (e) {
@@ -298,37 +324,12 @@ async function markConversationAsRead() {
   }
 }
 
-function scrollToBottom() {
-  if (messagesListEl.value) {
-    const element = messagesListEl.value
-    // 強制滾動到底部，使用 smooth 行為確保視覺效果
-    element.scrollTop = element.scrollHeight
-
-    // 再次確認滾動位置
-    setTimeout(() => {
-      if (element.scrollTop < element.scrollHeight - element.clientHeight) {
-        element.scrollTop = element.scrollHeight
-      }
-    }, 50)
-  }
-}
-
-watch(
-  messages,
-  async (newMessages) => {
-    if (newMessages.length === 0) return
-
-    await nextTick()
-
-    // Simple, reliable scroll to bottom
-    setTimeout(() => {
-      scrollToBottom()
-    }, 100)
-  },
-  { deep: true },
-)
-
 onMounted(async () => {
+  // 监听列表滚动，实时感知是否接近底部
+  if (messagesListEl.value) {
+    messagesListEl.value.addEventListener('scroll', updateNearBottom, { passive: true })
+  }
+
   currentUser.value = await fetchCurrentUser()
   if (currentUser.value) {
     await fetchMessages(0)
@@ -345,9 +346,8 @@ onMounted(async () => {
 
 watch(isConnected, (newValue) => {
   if (newValue) {
-    // 等待一小段时间确保连接稳定
     setTimeout(() => {
-      subscription = subscribe(`/topic/conversation/${conversationId}`, (message) => {
+      subscription = subscribe(`/topic/conversation/${conversationId}`, async (message) => {
         // 避免重复显示当前用户发送的消息
         if (message.sender.id !== currentUser.value.id) {
           messages.value.push({
@@ -357,11 +357,10 @@ watch(isConnected, (newValue) => {
               openUser(message.sender.id)
             },
           })
-          // 实时收到消息时自动标记为已读
+          // 收到消息后只标记已读，不强制滚动（符合“非发送不拉底”）
           markConversationAsRead()
-          setTimeout(() => {
+          await nextTick()
-            scrollToBottom()
+          updateNearBottom()
-          }, 100)
         }
       })
     }, 500)
@@ -369,23 +368,12 @@ watch(isConnected, (newValue) => {
 })
 
 onActivated(async () => {
-  // This will be called every time the component is activated (navigated to)
+  // 返回页面时：刷新数据与已读，不做强制滚动，保持用户当前位置
   if (currentUser.value) {
     await fetchMessages(0)
     await markConversationAsRead()
-
-    // 確保滾動到底部 - 使用多重延遲策略
     await nextTick()
-    setTimeout(() => {
+    updateNearBottom()
-      scrollToBottom()
-    }, 100)
-    setTimeout(() => {
-      scrollToBottom()
-    }, 300)
-    setTimeout(() => {
-      scrollToBottom()
-    }, 500)
-
     if (!isConnected.value) {
       const token = getToken()
       if (token) connect(token)
@@ -406,6 +394,9 @@ onUnmounted(() => {
     subscription.unsubscribe()
     subscription = null
   }
+  if (messagesListEl.value) {
+    messagesListEl.value.removeEventListener('scroll', updateNearBottom)
+  }
   disconnect()
 })
 

frontend_nuxt/pages/points.vue

@@ -104,6 +104,31 @@
                     ，获得{{ item.amount }}积分
                   </template>
                 </template>
+                <template v-else-if="item.type === 'POST_LIKE_CANCELLED' && item.fromUserId">
+                  你的帖子
+                  <NuxtLink :to="`/posts/${item.postId}`" class="timeline-link">
+                    {{ item.postTitle }}
+                  </NuxtLink>
+                  被
+                  <NuxtLink :to="`/users/${item.fromUserId}`" class="timeline-link">
+                    {{ item.fromUserName }}
+                  </NuxtLink>
+                  取消点赞，扣除{{ -item.amount }}积分
+                </template>
+                <template v-else-if="item.type === 'COMMENT_LIKE_CANCELLED' && item.fromUserId">
+                  你的评论
+                  <NuxtLink
+                    :to="`/posts/${item.postId}#comment-${item.commentId}`"
+                    class="timeline-link"
+                  >
+                    {{ stripMarkdownLength(item.commentContent, 100) }}
+                  </NuxtLink>
+                  被
+                  <NuxtLink :to="`/users/${item.fromUserId}`" class="timeline-link">
+                    {{ item.fromUserName }}
+                  </NuxtLink>
+                  取消点赞，扣除{{ -item.amount }}积分
+                </template>
                 <template v-else-if="item.type === 'POST_LIKED' && item.fromUserId">
                   帖子
                   <NuxtLink :to="`/posts/${item.postId}`" class="timeline-link">{{
@@ -227,6 +252,8 @@ const iconMap = {
   FEATURE: 'fas fa-star',
   LOTTERY_JOIN: 'fas fa-ticket-alt',
   LOTTERY_REWARD: 'fas fa-ticket-alt',
+  POST_LIKE_CANCELLED: 'fas fa-thumbs-down',
+  COMMENT_LIKE_CANCELLED: 'fas fa-thumbs-down',
 }
 
 const loadTrend = async () => {

frontend_nuxt/utils/markdown.js

@@ -96,6 +96,9 @@ const md = new MarkdownIt({
   linkify: true,
   breaks: true,
   highlight: (str, lang) => {
+    if (lang === 'mermaid') {
+      return `<pre class="mermaid">${str}</pre>`
+    }
     let code = ''
     if (lang && hljs.getLanguage(lang)) {
       code = hljs.highlight(str, { language: lang, ignoreIllegals: true }).value
@@ -182,7 +185,7 @@ const SANITIZE_CFG = {
   allowedClasses: {
     a: ['mention-link'],
     img: ['emoji'],
-    pre: ['code-block'],
+    pre: ['code-block', 'mermaid'],
     div: ['line-numbers', 'line-number'],
     code: ['hljs', /^language-/],
     button: ['copy-code-btn'],
@@ -208,8 +211,15 @@ const SANITIZE_CFG = {
 /** @section 渲染 & 事件 */
 export function renderMarkdown(text) {
   const raw = md.render(text || '')
-  // ⭐ 核心：对最终 HTML 进行一次净化
+  const html = sanitizeHtml(raw, SANITIZE_CFG)
-  return sanitizeHtml(raw, SANITIZE_CFG)
+  if (typeof window !== 'undefined') {
+    setTimeout(async () => {
+      const mermaid = await import('mermaid')
+      mermaid.default.initialize({ startOnLoad: false })
+      mermaid.default.run({ nodes: document.querySelectorAll('.mermaid') })
+    })
+  }
+  return html
 }
 
 export function handleMarkdownClick(e) {

frontend_nuxt/utils/time.js

@@ -4,6 +4,17 @@ export default class TimeManager {
     if (Number.isNaN(date.getTime())) return ''
 
     const now = new Date()
+    const diffMs = now.getTime() - date.getTime()
+
+    if (diffMs >= 0 && diffMs < 60 * 1000) {
+      return '刚刚'
+    }
+
+    if (diffMs >= 0 && diffMs < 60 * 60 * 1000) {
+      const mins = Math.floor(diffMs / 60_000)
+      return `${mins || 1}分钟前`
+    }
+
     const startOfToday = new Date(now.getFullYear(), now.getMonth(), now.getDate())
     const startOfDate = new Date(date.getFullYear(), date.getMonth(), date.getDate())
     const diffDays = Math.floor((startOfToday - startOfDate) / 86400000)