Index: openacs-4/packages/notifications/lib/notification-sse.adp
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/notifications/lib/notification-sse.adp,v
diff -u
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ openacs-4/packages/notifications/lib/notification-sse.adp	6 Feb 2025 15:55:53 -0000	1.1
@@ -0,0 +1,50 @@
+<%
+  #
+  # Subscribe to the notification event
+  #
+%>
+<script <if @::__csp_nonce@ not nil> nonce="@::__csp_nonce;literal@"</if>>
+
+function messageToNotification(message) {
+    const notification = new Notification(
+        message.subject,
+        {
+            body: message.content,
+            icon: `/shared/portrait-bits.tcl?user_id=${message.from_user.user_id}`
+        }
+    );
+    return notification;
+}
+
+function notifyMe(message) {
+    if (!('Notification' in window)) {
+        console.warn('This browser does not support desktop notification');
+        return
+    }
+
+    if (Notification.permission === 'granted') {
+        // Check whether notification permissions have already been granted;
+        // if so, create a notification
+        const notification = messageToNotification(message);
+    } else if (Notification.permission !== 'denied') {
+        // We need to ask the user for permission
+        Notification.requestPermission().then((permission) => {
+            // If the user accepts, let's create a notification
+            if (permission === 'granted') {
+                const notification = messageToNotification(message);
+            }
+        });
+    } else {
+        console.warn('Your browser does not have permission to display this notification.');
+        return
+    }
+}
+
+const evtSource = new EventSource('/notifications/sse/subscribe');
+evtSource.onmessage = (event) => {
+    const message = JSON.parse(event.data);
+    notifyMe(message);
+    console.log(message);
+};
+
+</script>