Add hot topics widget

back/main.py

@@ -582,6 +582,19 @@ def get_post_info():
     except Exception as e:
         return jsonify({"code": 2003, "data": str(e)})
 
+@app.route('/api/hot_topics', methods=['GET'])
+def get_hot_topics():
+    try:
+        rows = db.session.query(
+            Hashtag.name,
+            db.func.count(Hashtag.name).label('count')
+        ).group_by(Hashtag.name).order_by(db.func.count(Hashtag.name).desc()).limit(5).all()
+
+        data = [{"name": name, "count": int(count)} for name, count in rows]
+        return jsonify({"code": 1000, "data": {"list": data}})
+    except Exception as e:
+        return jsonify({"code": 2003, "data": str(e)})
+    
 # --- 彩蛋 ---
 @app.route('/api/teapot', methods=['GET'])
 def return_418():

front/src/api.ts

@@ -55,6 +55,11 @@ export interface StaticsData {
   images: number;
 }
 
+export interface HotTopicItem {
+  name: string;
+  count: number;
+}
+
 export const testApiStatus = async (): Promise<boolean> => {
   try {
     const response = await fetch('/api/test');
@@ -123,6 +128,23 @@ const notifyInvalidIdentity = () => {
   }
 };
 
+export const getHotTopics = async (): Promise<HotTopicItem[]> => {
+  try {
+    const response = await fetch('/api/hot_topics');
+    if (!response.ok) {
+      throw new Error(`HTTP error! status: ${response.status}`);
+    }
+    const json = await response.json();
+    if (json.code === 1000 && json.data && Array.isArray(json.data.list)) {
+      return json.data.list as HotTopicItem[];
+    }
+    throw new Error('Invalid response code or missing data');
+  } catch (error) {
+    console.error('Failed to fetch hot topics:', error);
+    throw error;
+  }
+};
+
 const handlePostApiCode = (json: any) => {
   if (json && json.code === 2004) {
     notifyInvalidIdentity();

front/src/components/Widgets.tsx

@@ -12,6 +12,7 @@ import {
   useToastController,
   Toast,
   ToastTitle,
+  Divider,
 } from '@fluentui/react-components';
 import { 
   CheckmarkCircle20Filled, 
@@ -19,8 +20,8 @@ import {
   ArrowClockwise20Regular
 } from '@fluentui/react-icons';
 import { useLayout } from '../context/LayoutContext';
-import { testApiStatus, getStatics } from '../api';
+import { testApiStatus, getStatics, getHotTopics } from '../api';
-import type { StaticsData } from '../api';
+import type { StaticsData, HotTopicItem } from '../api';
 
 const useStyles = makeStyles({
   container: {
@@ -71,31 +72,55 @@ const useStyles = makeStyles({
   headerText: {
     fontSize: tokens.fontSizeBase300,
     fontWeight: tokens.fontWeightSemibold,
-  }
+  },
+  topicList: {
+    padding: `${tokens.spacingVerticalS} ${tokens.spacingHorizontalM}`,
+    display: 'flex',
+    flexDirection: 'column',
+    gap: tokens.spacingVerticalS,
+  },
+  topicRow: {
+    display: 'flex',
+    flexDirection: 'column',
+    gap: tokens.spacingVerticalXXS,
+    padding: `${tokens.spacingVerticalS} 0`,
+  },
+  topicName: {
+    fontSize: tokens.fontSizeBase300,
+    color: tokens.colorNeutralForeground1,
+  },
+  topicCount: {
+    fontSize: tokens.fontSizeBase200,
+    color: tokens.colorNeutralForeground3,
+  },
 });
 
-const StatusDisplay: React.FC = () => {
+const Widgets: React.FC = () => {
   const styles = useStyles();
   const { toasterId, refreshTrigger, staticsRefreshTrigger } = useLayout();
   const { dispatchToast } = useToastController(toasterId);
   const [isApiOnline, setIsApiOnline] = useState<boolean | null>(null);
   const [statics, setStatics] = useState<StaticsData | null>(null);
+  const [topics, setTopics] = useState<HotTopicItem[]>([]);
   const [isTestLoading, setIsTestLoading] = useState<boolean>(true);
   const [isStaticsLoading, setIsStaticsLoading] = useState<boolean>(true);
+  const [isTopicsLoading, setIsTopicsLoading] = useState<boolean>(true);
   const checkStatus = useCallback(async () => {
     const online = await testApiStatus();
     setIsApiOnline(online);
     setIsTestLoading(false);
   }, []);
-  const refreshStatics = useCallback(async (isManual: boolean = false) => {
+  const refreshWidgets = useCallback(async (isManual: boolean = false) => {
     setIsStaticsLoading(true);
+    setIsTopicsLoading(true);
     try {
-      const data = await getStatics();
+      const [staticsData, topicsData] = await Promise.all([getStatics(), getHotTopics()]);
-      setStatics(data);
+      setStatics(staticsData);
+      setTopics(topicsData);
       if (isManual) {
         dispatchToast(
           <Toast>
-            <ToastTitle>统计数据已刷新</ToastTitle>
+            <ToastTitle>小组件数据已刷新</ToastTitle>
           </Toast>,
           { intent: 'success' }
         );
@@ -103,15 +128,17 @@ const StatusDisplay: React.FC = () => {
     } catch (error) {
       console.error('Failed to refresh statics:', error);
       setStatics(null); // 失败时重置数据
+      setTopics([]);
     } finally {
       setIsStaticsLoading(false);
+      setIsTopicsLoading(false);
     }
   }, [dispatchToast]);
 
   useEffect(() => {
     // 初始加载
     checkStatus();
-    refreshStatics(false);
+    refreshWidgets(false);
 
     // 每 10 秒测试一次后端 API 状态
     const testInterval = setInterval(checkStatus, 10000);
@@ -119,20 +146,20 @@ const StatusDisplay: React.FC = () => {
     return () => {
       clearInterval(testInterval);
     };
-  }, [checkStatus, refreshStatics]);
+  }, [checkStatus, refreshWidgets]);
 
   // Listen for global refresh trigger
   useEffect(() => {
     if (refreshTrigger > 0) {
-      refreshStatics(false);
+      refreshWidgets(false);
     }
-  }, [refreshTrigger, refreshStatics]);
+  }, [refreshTrigger, refreshWidgets]);
 
   useEffect(() => {
     if (staticsRefreshTrigger > 0) {
-      refreshStatics(false);
+      refreshWidgets(false);
     }
-  }, [staticsRefreshTrigger, refreshStatics]);
+  }, [staticsRefreshTrigger, refreshWidgets]);
 
   return (
     <div className={styles.container}>
@@ -164,16 +191,6 @@ const StatusDisplay: React.FC = () => {
       <Card className={styles.card}>
         <CardHeader
           header={<Text className={styles.headerText}>统计数据</Text>}
-          action={
-            <Button
-              className={styles.refreshButton}
-              appearance="subtle"
-              icon={<ArrowClockwise20Regular fontSize={16} />}
-              onClick={() => refreshStatics(true)}
-              disabled={isStaticsLoading}
-              title="刷新统计数据"
-            />
-          }
         />
         <div className={styles.statsContainer}>
           {isStaticsLoading && !statics ? (
@@ -198,8 +215,41 @@ const StatusDisplay: React.FC = () => {
           )}
         </div>
       </Card>
+
+      <Card className={styles.card}>
+        <CardHeader
+          header={<Text className={styles.headerText}># 趋势</Text>}
+          action={
+            <Button
+              className={styles.refreshButton}
+              appearance="subtle"
+              icon={<ArrowClockwise20Regular fontSize={16} />}
+              onClick={() => refreshWidgets(true)}
+              disabled={isTopicsLoading || isStaticsLoading}
+              title="刷新小组件数据"
+            />
+          }
+        />
+        <div className={styles.topicList}>
+          {isTopicsLoading ? (
+            <Spinner size="tiny" label="加载中..." />
+          ) : topics.length === 0 ? (
+            <Text className={styles.labelText} italic>暂无话题</Text>
+          ) : (
+            topics.map((topic, index) => (
+              <React.Fragment key={`${topic.name}-${index}`}>
+                <div className={styles.topicRow}>
+                  <Text className={styles.topicName}>#{topic.name}</Text>
+                  <Text className={styles.topicCount}>{topic.count}个投稿</Text>
+                </div>
+                {index < topics.length - 1 && <Divider />}
+              </React.Fragment>
+            ))
+          )}
+        </div>
+      </Card>
     </div>
   );
 };
 
-export default StatusDisplay;
+export default Widgets;

front/src/layouts/MainLayout.tsx

@@ -4,7 +4,7 @@ import { Outlet } from 'react-router-dom';
 import Header from './components/Header';
 import Sidebar from './components/Sidebar';
 import Footer from './components/Footer';
-import StatusDisplay from '../components/StatusDisplay';
+import Widgets from '../components/Widgets';
 import { LayoutProvider, useLayout } from '../context/LayoutContext';
 
 const useStyles = makeStyles({
@@ -66,7 +66,7 @@ const LayoutContent = ({ toasterId, overlays }: { toasterId: string; overlays?:
             <Outlet />
           </main>
           <aside className={styles.rightPanel}>
-            <StatusDisplay />
+            <Widgets />
           </aside>
         </div>
         <Footer />