Debug when user stays online at closing browser

src/backend/backend.js

@@ -153,34 +153,22 @@ const openSocket = () => {
 		});
 };
 
-// auth helpers -----------------------------------------------------------
-
-const setAuth = (t, u) => {
-	authToken = t;
-	authUser = u;
-	saveAuthToStorage(t, u);
-	openSocket();
-};
-
-const clearAuth = () => {
-	authToken = null;
-	authUser = null;
-	clearAuthStorage();
-	if (hub) {
-		hub.stop();
-		hub = null;
-	}
-};
-
 // presence ---------------------------------------------------------------
 
-const patchOnline = async (on) => {
+// patchOnline(on, keep = false)  ← keep=true will add keepalive: true
+
+const patchOnline = async (on, keep = false) => {
 	if (!authUser) return;
 
 	try {
-		await $fetch(USERS_URL, {
+		await fetch(USERS_URL, {
 			method: "PUT",
+
+			headers: { "Content-Type": "application/json", ...authHeader() },
+
 			body: JSON.stringify({ user_id: authUser, isOnline: on ? 1 : 0 }),
+
+			...(keep ? { keepalive: true } : {}),
 		});
 	} catch (e) {
 		console.warn("[online] PUT failed:", e.message);
@@ -191,6 +179,77 @@ export const currentUserOnline = () => patchOnline(true);
 
 export const currentUserOffline = () => patchOnline(false);
 
+// leave / background handlers -------------------------------------------
+
+let leaveHandlerInstalled = false;
+
+const sendOfflineKeepalive = () => patchOnline(false, true);
+
+const handleVisibility = () => {
+	if (document.visibilityState === "hidden") sendOfflineKeepalive();
+
+	if (document.visibilityState === "visible") currentUserOnline();
+};
+
+const installLeaveHandlers = () => {
+	if (leaveHandlerInstalled) return;
+
+	window.addEventListener("pagehide", sendOfflineKeepalive); // tab / window close
+
+	window.addEventListener("freeze", sendOfflineKeepalive); // page-lifecycle freeze
+
+	window.addEventListener("resume", currentUserOnline); // page-lifecycle resume
+
+	document.addEventListener("visibilitychange", handleVisibility);
+
+	leaveHandlerInstalled = true;
+};
+
+const removeLeaveHandlers = () => {
+	if (!leaveHandlerInstalled) return;
+
+	window.removeEventListener("pagehide", sendOfflineKeepalive);
+
+	window.removeEventListener("freeze", sendOfflineKeepalive);
+
+	window.removeEventListener("resume", currentUserOnline);
+
+	document.removeEventListener("visibilitychange", handleVisibility);
+
+	leaveHandlerInstalled = false;
+};
+
+// setAuth … add
+
+const setAuth = (t, u) => {
+	authToken = t;
+
+	authUser = u;
+
+	saveAuthToStorage(t, u);
+
+	openSocket();
+
+	installLeaveHandlers(); // ← here
+};
+
+// clearAuth … add
+
+const clearAuth = () => {
+	authToken = null;
+
+	authUser = null;
+
+	clearAuthStorage();
+
+	if (hub) {
+		hub.stop();
+		hub = null;
+	}
+
+	removeLeaveHandlers(); // ← here
+};
+
 // bootstrap after login/restore -----------------------------------------
 
 const bootstrapSession = async (uid) => {

src/components/UserAccount.jsx

@@ -86,7 +86,7 @@ const UserAccount = () => {
 
 	/* -------------------------------------------------- */
 
-  /* Firestore-like subscriptions & online/offline flag */
+	/*           Firestore-like subscriptions             */
 
 	/* -------------------------------------------------- */
 
@@ -101,21 +101,6 @@ const UserAccount = () => {
 
 		currentUserOnline();
 
-    /* window closed or refreshed */
-
-    const beforeUnload = () => currentUserOffline();
-
-    window.addEventListener("beforeunload", beforeUnload);
-
-    /* tab visibility switch */
-
-    const visChange = () =>
-      document.visibilityState === "visible"
-        ? currentUserOnline()
-        : currentUserOffline();
-
-    document.addEventListener("visibilitychange", visChange);
-
 		/* cleanup */
 
 		return () => {
@@ -124,10 +109,6 @@ const UserAccount = () => {
 			unsubUsers();
 
 			unsubPosts();
-
-      window.removeEventListener("beforeunload", beforeUnload);
-
-      document.removeEventListener("visibilitychange", visChange);
 		};
 	}, []);
 
@@ -165,8 +146,8 @@ const UserAccount = () => {
 	/* -------------------------------------------------- */
 
 	return (
-    <div className='bg-200 vw-100 main-container overflow-hidden'>
-      <Container className='w-100 p-0' fluid>
+		<div className="bg-200 vw-100 main-container overflow-hidden">
+			<Container className="w-100 p-0" fluid>
 				<Router>
 					<RouteStateSync />
 
@@ -175,29 +156,29 @@ const UserAccount = () => {
 					<Switch>
 						{/* Friends list ------------------------------------------------ */}
 
-            <Route path='/fakebook/friends/list' component={FriendsListPage} />
+						<Route path="/fakebook/friends/list" component={FriendsListPage} />
 
 						{/* Single photo ----------------------------------------------- */}
 
-            <Route path='/fakebook/photo/:userID/:n' component={PhotoViewer} />
+						<Route path="/fakebook/photo/:userID/:n" component={PhotoViewer} />
 
 						{/* Watch (video feed) ----------------------------------------- */}
 
 						<Route
-              path='/fakebook/watch'
-              render={(props) => <HomePage {...props} className='pt-5' />}
+							path="/fakebook/watch"
+							render={(props) => <HomePage {...props} className="pt-5" />}
 						/>
 
 						{/* User profile ----------------------------------------------- */}
 
-            <Route path='/fakebook/:userName' component={Profile} />
+						<Route path="/fakebook/:userName" component={Profile} />
 
 						{/* News-feed root --------------------------------------------- */}
 
 						<Route
-              path='/fakebook'
+							path="/fakebook"
 							exact
-              render={(props) => <HomePage {...props} className='pt-5' />}
+							render={(props) => <HomePage {...props} className="pt-5" />}
 						/>
 					</Switch>
 				</Router>