implemented re-connect for chrome os, Fixes https://github.com/bcmi-labs/webide/issues/2194

Author: Stefania

src/chrome-app-daemon.js

@@ -18,10 +18,13 @@
 *
 */
 
-import { takeUntil, filter } from 'rxjs/operators';
+import { interval } from 'rxjs';
+import { filter, startWith, takeUntil } from 'rxjs/operators';
 
 import Daemon from './daemon';
 
+const POLLING_INTERVAL = 2000;
+
 export default class ChromeOsDaemon extends Daemon {
   constructor(chromeExtensionId) {
     super();
@@ -31,15 +34,31 @@ export default class ChromeOsDaemon extends Daemon {
       command: 'listPorts'
     }));
 
-    this._appConnect(chromeExtensionId);
+    this.chromeExtensionId = chromeExtensionId;
+
+    this.agentFound
+      .subscribe(agentFound => {
+        if (!agentFound) {
+          this.findApp();
+        }
+      });
+  }
+
+  findApp() {
+    interval(POLLING_INTERVAL)
+      .pipe(startWith(0))
+      .pipe(takeUntil(this.channelOpen.pipe(filter(status => status))))
+      .subscribe(() => {
+        this._appConnect();
+      });
   }
 
   /**
    * Instantiate connection and events listeners for chrome app
    */
-  _appConnect(chromeExtensionId) {
+  _appConnect() {
     if (chrome.runtime) {
-      this.channel = chrome.runtime.connect(chromeExtensionId);
+      this.channel = chrome.runtime.connect(this.chromeExtensionId);
       this.channel.onMessage.addListener(message => {
         if (message.version) {
           this.agentInfo = message;