send notifications over SSE to be displayed inside the app

app/utils/events.server.ts

@@ -0,0 +1,15 @@
+import { EventEmitter } from "events";
+
+import type { NotificationPayload } from "~/utils/web-push.server";
+
+declare global {
+	var notifications: EventEmitter;
+}
+
+global.notifications = global.notifications || new EventEmitter();
+
+export const events = global.notifications;
+
+export function notifySSE(payload: NotificationPayload) {
+	global.notifications.emit("notification", payload);
+}