chore: OliveTin 3k progress

frontend/js/websocket.js

@@ -0,0 +1,50 @@
+import {
+  refreshServerConnectionLabel
+} from './marshaller.js'
+
+export function checkWebsocketConnection () {
+  reconnectWebsocket()
+}
+
+window.websocketAvailable = false
+
+async function reconnectWebsocket () {
+  if (window.websocketAvailable) {
+    return
+  }
+
+  try {
+    window.websocketAvailable = true
+    for await (let e of window.client.eventStream()) {
+      handleEvent(e)
+    }
+  } catch (err) {
+    console.error('Websocket connection failed: ', err)
+  }
+
+  window.websocketAvailable = false
+  console.log('Reconnecting websocket...')
+}
+
+function handleEvent (msg) {
+  const typeName = msg.event.value.$typeName.replace('olivetin.api.v1.', '')
+
+  console.log("Websocket event receved: ", typeName)
+
+  const j = new Event(typeName)
+  j.payload = msg.event.value
+
+  switch (typeName) {
+    case 'EventOutputChunk':
+    case 'EventConfigChanged':
+    case 'EventEntityChanged':
+    case 'EventExecutionFinished':
+    case 'EventExecutionStarted':
+      window.dispatchEvent(j)
+      break
+    default:
+      console.warn('Unhandled websocket message type from server: ', typeName)
+
+      window.showBigError('ws-unhandled-message', 'handling websocket message', 'Unhandled websocket message type from server: ' + typeName, true)
+  }
+}