add sse service and plugin

config/nuxtConfig/plugins.js

@@ -10,6 +10,7 @@ export default {
     '~/plugins/Data/dataProvider',
     '~/plugins/Data/dataDeleter',
     '~/plugins/vuexOrm.js',
-    '~/plugins/phone-input'
+    '~/plugins/phone-input',
+    { src: '~/plugins/sse.ts', mode: 'client' },
   ]
 }

plugins/sse.ts

@@ -0,0 +1,15 @@
+import {Plugin} from "@nuxt/types";
+import SseSource from "~/services/sse/sseSource";
+
+/**
+ * Setup SSE EventSource, allowing the app to listen for Mercure updates
+ * @param ctx
+ */
+const ssePlugin: Plugin = ({ $config, store }) => {
+  const sseSource = new SseSource($config.baseUrl_mercure, store.state.profile.access.id)
+
+  sseSource.subscribe()
+  window.addEventListener('beforeunload', () => { sseSource.unsubscribe() })
+}
+
+export default ssePlugin

services/sse/sse.ts → services/sse/sseSource.ts

@@ -1,6 +1,6 @@
 import { EventSourcePolyfill } from "event-source-polyfill";
 
-class Sse {
+class SseSource {
   private readonly accessId: number
   private readonly url: URL
   private eventSource: EventSource | null = null
@@ -54,4 +54,4 @@ class Sse {
   }
 }
 
-export default Sse
+export default SseSource