Feat:增加SSE新帖推送

src/App.tsx

@@ -1,8 +1,8 @@
 // 你好，感谢你愿意看源代码，但是悄悄告诉你，代码其实是AI写的所以质量很差喵。抱歉呜呜呜😭。
 
 import React, { useState, useEffect, useRef, useCallback } from 'react';
-import { FluentProvider, webLightTheme, webDarkTheme, tokens, Button } from '@fluentui/react-components';
+import { FluentProvider, webLightTheme, webDarkTheme, tokens, Button, MessageBar, MessageBarBody, MessageBarActions } from '@fluentui/react-components';
-import { BrowserRouter, Routes, Route } from 'react-router-dom';
+import { BrowserRouter, Routes, Route, useLocation, useNavigate } from 'react-router-dom';
 import PostCard from './components/PostCard';
 import MainLayout from './layouts/MainLayout';
 import './App.css';
@@ -21,7 +21,74 @@ import ImageViewer from './components/ImageViewer';
 import NoticeModal from './components/NoticeModal';
 import type { NoticeData } from './components/NoticeModal';
 import DevToolsModal from './components/DevToolsModal';
-import { Bug24Regular } from '@fluentui/react-icons';
+import { Bug24Regular, Dismiss24Regular } from '@fluentui/react-icons';
+import { useSSE } from './hooks/useSSE';
+
+// 全局组件，管理 SSE 和新帖提示
+function GlobalSSEManager({
+  onNewPost,
+  newPostCount,
+  showNewPostBar,
+  onRefreshClick,
+  onDismiss
+}: {
+  onNewPost: () => void;
+  newPostCount: number;
+  showNewPostBar: boolean;
+  onRefreshClick: () => void;
+  onDismiss: () => void;
+}) {
+  const [sseEnabled, setSseEnabled] = useState(false);
+
+  // 延迟启动 SSE，等待其他内容加载完成
+  useEffect(() => {
+    const timer = setTimeout(() => {
+      setSseEnabled(true);
+    }, 1000); // 延迟 1 秒后启动 SSE
+
+    return () => clearTimeout(timer);
+  }, []);
+
+  // 使用 SSE hook，始终启用（不限制页面）
+  useSSE({
+    enabled: sseEnabled,
+    onNewPost,
+    maxRetries: 3,
+  });
+
+  return (
+    <>
+      {/* 新帖提示 MessageBar - 全局显示 */}
+      {showNewPostBar && (
+        <div style={{
+          position: 'fixed',
+          top: '80px',
+          left: '50%',
+          transform: 'translateX(-50%)',
+          zIndex: 2000,
+          maxWidth: '600px',
+          width: 'calc(100% - 40px)',
+        }}>
+          <MessageBar intent="info">
+            <MessageBarBody>
+              <div onClick={onRefreshClick} style={{ cursor: 'pointer' }}>
+                有 {newPostCount} 条新帖，点击刷新
+              </div>
+            </MessageBarBody>
+            <MessageBarActions>
+              <Button
+                aria-label="dismiss"
+                appearance="transparent"
+                icon={<Dismiss24Regular />}
+                onClick={onDismiss}
+              />
+            </MessageBarActions>
+          </MessageBar>
+        </div>
+      )}
+    </>
+  );
+}
 
 function App() {
   const [isDarkMode, setIsDarkMode] = React.useState(() => {
@@ -58,6 +125,8 @@ function App() {
   const [showNotice, setShowNotice] = useState(false);
   const [showDevTools, setShowDevTools] = useState(false);
   const [isDebugMode, setIsDebugMode] = useState(false);
+  const [newPostCount, setNewPostCount] = useState(0);
+  const [showNewPostBar, setShowNewPostBar] = useState(false);
 
   useEffect(() => {
     const searchParams = new URLSearchParams(window.location.search);
@@ -114,8 +183,21 @@ function App() {
     setPage(1);
     setHomeRefreshTick((t) => t + 1);
     if (containerRef.current) containerRef.current.scrollTop = 0;
+    // 重置新帖数量
+    setNewPostCount(0);
+    setShowNewPostBar(false);
   };
 
+  const handleNewPostBarDismiss = useCallback(() => {
+    setShowNewPostBar(false);
+    setNewPostCount(0);
+  }, []);
+
+  const handleNewPost = useCallback(() => {
+    setNewPostCount((prev) => prev + 1);
+    setShowNewPostBar(true);
+  }, []);
+
   // 移除触摸下拉刷新逻辑
 
   // 撤销 Pointer 事件回退，恢复为纯 Touch 逻辑
@@ -163,6 +245,116 @@ function App() {
   return (
     <FluentProvider theme={isDarkMode ? webDarkTheme : webLightTheme}>
       <BrowserRouter>
+        <AppContent
+          isDarkMode={isDarkMode}
+          setIsDarkMode={setIsDarkMode}
+          articles={articles}
+          page={page}
+          loading={loading}
+          hasMore={hasMore}
+          refreshing={refreshing}
+          containerRef={containerRef}
+          lastArticleRef={lastArticleRef}
+          onWheel={onWheel}
+          openImageViewer={openImageViewer}
+          doRefresh={doRefresh}
+          newPostCount={newPostCount}
+          showNewPostBar={showNewPostBar}
+          handleNewPost={handleNewPost}
+          handleNewPostBarDismiss={handleNewPostBarDismiss}
+          isDebugMode={isDebugMode}
+          showDevTools={showDevTools}
+          setShowDevTools={setShowDevTools}
+        />
+        <ToastContainer theme={isDarkMode ? 'dark' : 'light'} />
+        <Toaster
+          position="top-center"
+          toastOptions={{
+            style: {
+              background: isDarkMode ? '#333' : '#fff',
+              color: isDarkMode ? '#fff' : '#333',
+            },
+          }}
+        />
+        {imageViewer.open && imageViewer.src && (
+          <ImageViewer src={imageViewer.src!} alt={imageViewer.alt} onClose={closeImageViewer} />
+        )}
+        {showNotice && noticeData && (
+          <div style={{
+            position: 'fixed',
+            top: 0,
+            left: 0,
+            right: 0,
+            bottom: 0,
+            backgroundColor: 'rgba(0, 0, 0, 0.5)',
+            zIndex: 2000,
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+          }}>
+            <NoticeModal
+              data={noticeData}
+              onClose={() => setShowNotice(false)}
+              onNeverShow={(version) => {
+                localStorage.setItem('notice_version', String(version));
+                setShowNotice(false);
+              }}
+            />
+          </div>
+        )}
+        {showDevTools && <DevToolsModal onClose={() => setShowDevTools(false)} />}
+      </BrowserRouter>
+    </FluentProvider>
+  );
+}
+
+// 内部组件，在 BrowserRouter 内部，可以使用 useNavigate
+function AppContent({
+  isDarkMode,
+  setIsDarkMode,
+  articles,
+  loading,
+  hasMore,
+  refreshing,
+  containerRef,
+  lastArticleRef,
+  onWheel,
+  openImageViewer,
+  doRefresh,
+  newPostCount,
+  showNewPostBar,
+  handleNewPost,
+  handleNewPostBarDismiss,
+  isDebugMode,
+  showDevTools,
+  setShowDevTools,
+}: any) {
+  const navigate = useNavigate();
+  const location = useLocation();
+
+  const handleNewPostBarClick = () => {
+    // 如果不在首页，先跳转到首页
+    if (location.pathname !== '/') {
+      navigate('/');
+      // 等待导航完成后刷新
+      setTimeout(() => {
+        doRefresh();
+      }, 100);
+    } else {
+      // 已经在首页，直接刷新
+      doRefresh();
+    }
+  };
+
+  return (
+    <>
+      <GlobalSSEManager
+        onNewPost={handleNewPost}
+        newPostCount={newPostCount}
+        showNewPostBar={showNewPostBar}
+        onRefreshClick={handleNewPostBarClick}
+        onDismiss={handleNewPostBarDismiss}
+      />
       <Routes>
           <Route path="/" element={<MainLayout isDarkMode={isDarkMode} onToggleTheme={() => setIsDarkMode(!isDarkMode)} />}>
             <Route
@@ -230,43 +422,6 @@ function App() {
           <Route path="/admin" element={<AdminPage isDarkMode={isDarkMode} onToggleTheme={() => setIsDarkMode(!isDarkMode)} />} />
           <Route path="*" element={<NotFound />} />
         </Routes>
-      </BrowserRouter>
-      <ToastContainer theme={isDarkMode ? 'dark' : 'light'} />
-      <Toaster
-        position="top-center"
-        toastOptions={{
-          style: {
-            background: isDarkMode ? '#333' : '#fff',
-            color: isDarkMode ? '#fff' : '#333',
-          },
-        }}
-      />
-      {imageViewer.open && imageViewer.src && (
-        <ImageViewer src={imageViewer.src!} alt={imageViewer.alt} onClose={closeImageViewer} />
-      )}
-      {showNotice && noticeData && (
-        <div style={{
-          position: 'fixed',
-          top: 0,
-          left: 0,
-          right: 0,
-          bottom: 0,
-          backgroundColor: 'rgba(0, 0, 0, 0.5)',
-          zIndex: 2000,
-          display: 'flex',
-          alignItems: 'center',
-          justifyContent: 'center',
-        }}>
-          <NoticeModal
-            data={noticeData}
-            onClose={() => setShowNotice(false)}
-            onNeverShow={(version) => {
-              localStorage.setItem('notice_version', String(version));
-              setShowNotice(false);
-            }}
-          />
-        </div>
-      )}
 
         {/* DevTools Trigger */}
         {isDebugMode && (
@@ -280,8 +435,7 @@ function App() {
             />
           </div>
         )}
-      {showDevTools && <DevToolsModal onClose={() => setShowDevTools(false)} />}
+      </>
-    </FluentProvider>
     );
 }
 

src/hooks/useSSE.ts

@@ -0,0 +1,100 @@
+import { useEffect, useRef, useState } from 'react';
+import { API_CONFIG } from '../config';
+
+interface UseSSEOptions {
+  onNewPost?: () => void;
+  maxRetries?: number;
+  enabled?: boolean;
+}
+
+export function useSSE(options: UseSSEOptions = {}) {
+  const {
+    onNewPost,
+    maxRetries = 3,
+    enabled = true,
+  } = options;
+
+  const [isConnected, setIsConnected] = useState(false);
+  const eventSourceRef = useRef<EventSource | null>(null);
+  const retriesRef = useRef(0);
+  const reconnectTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+  const onNewPostRef = useRef(onNewPost);
+
+  // 更新 ref 以获取最新的回调
+  useEffect(() => {
+    onNewPostRef.current = onNewPost;
+  }, [onNewPost]);
+
+  useEffect(() => {
+    if (!enabled) {
+      return;
+    }
+
+    const connect = () => {
+      // 如果已经达到最大重连次数，放弃连接
+      if (retriesRef.current >= maxRetries) {
+        return;
+      }
+
+      try {
+        const eventSource = new EventSource(`${API_CONFIG.BASE_URL}/stream`);
+        eventSourceRef.current = eventSource;
+
+        eventSource.onopen = () => {
+          setIsConnected(true);
+          retriesRef.current = 0; // 重置重试计数
+        };
+
+        eventSource.onmessage = (event) => {
+          const data = event.data;
+
+          if (data === 'heartbeat') {
+            // 心跳消息，不做处理
+            return;
+          }
+
+          if (data === 'new_post') {
+            // 新投稿通知
+            onNewPostRef.current?.();
+          }
+        };
+
+        eventSource.onerror = () => {
+          setIsConnected(false);
+          eventSource.close();
+
+          // 如果还没达到最大重连次数，尝试重连
+          if (retriesRef.current < maxRetries) {
+            retriesRef.current += 1;
+
+            // 使用指数退避策略重连
+            const delay = Math.min(1000 * Math.pow(2, retriesRef.current - 1), 10000);
+            reconnectTimeoutRef.current = setTimeout(() => {
+              connect();
+            }, delay);
+          }
+        };
+      } catch {
+        setIsConnected(false);
+      }
+    };
+
+    // 初始连接
+    connect();
+
+    // 清理函数
+    return () => {
+      if (eventSourceRef.current) {
+        eventSourceRef.current.close();
+        eventSourceRef.current = null;
+      }
+      if (reconnectTimeoutRef.current) {
+        clearTimeout(reconnectTimeoutRef.current);
+        reconnectTimeoutRef.current = null;
+      }
+      setIsConnected(false);
+    };
+  }, [enabled, maxRetries]);
+
+  return { isConnected };
+}