improve signal for audio join/leave when in iframe

bbb-api-demo/src/main/webapp/demo_iframe.jsp

@@ -137,7 +137,6 @@ function getInitialState() {
 }
 
 function handleMessage(e) {
-  let neverJoinedAudio = true;
   switch (e) {
     case 'readyToConnect': {
       // get initial state
@@ -161,15 +160,9 @@ function handleMessage(e) {
     case 'notInAudio': {
       muteButton.innerHTML = 'Not in audio';
       document.getElementById('muteButton').disabled = true;
-      if (neverJoinedAudio) {
-        // poll every 1 sec to check if we joined audio
-        setTimeout(function(){
-          document.getElementById('client-content').contentWindow.postMessage('get_audio_joined_status', '*');
-        }, 1000);}
       break;
     }
     case 'joinedAudio': {
-      neverJoinedAudio = false;
       muteButton.innerHTML = '';
       document.getElementById('muteButton').disabled = false;
       document.getElementById('client-content').contentWindow.postMessage('c_mute_status', '*');

bigbluebutton-html5/imports/ui/services/audio-manager/index.js

@@ -238,10 +238,6 @@ class AudioManager {
             window.parent.postMessage({ response: muteState }, '*');
           }
 
-          if (fields.joined) {
-            window.parent.postMessage({ response: 'joinedAudio' }, '*');
-          }
-
           if (fields.talking !== undefined && fields.talking !== this.isTalking) {
             this.isTalking = fields.talking;
           }
@@ -254,6 +250,7 @@ class AudioManager {
     }
 
     if (!this.isEchoTest) {
+      window.parent.postMessage({ response: 'joinedAudio' }, '*');
       this.notify(this.messages.info.JOINED_AUDIO);
     }
   }
@@ -278,6 +275,7 @@ class AudioManager {
     if (!this.error && !this.isEchoTest) {
       this.notify(this.messages.info.LEFT_AUDIO);
     }
+    window.parent.postMessage({ response: 'notInAudio' }, '*');
   }
 
   callStateCallback(response) {