Invoke another player when one media response(audio playing) is done - action

Question

I have a problem.
I pick up a dialogflow, google action sample (playing a audio file)
I want to build for several audio files.
So when media response is done, media status is invoked.
So at that time, I want to play next audio automatically.
Please help me. I need your kind help.
Thanks.
This is my code.
'use strict';
const {
dialogflow,
SimpleResponse,
Image,
Suggestions,
MediaObject,
} = require('actions-on-google');
const functions = require('firebase-functions');
const app = dialogflow({debug: true});
app.intent('Media Response', (conv) => {
if (!conv.surface.capabilities
.has('actions.capability.MEDIA_RESPONSE_AUDIO')) {
conv.ask('Sorry, this device does not support audio playback.');
conv.ask('Which response would you like to see next?');
return;
}
conv.ask('This is a media response example.');
conv.ask(new MediaObject({
name: 'Jazz in Paris',
url: 'https://storage.googleapis.com/automotive-media/Jazz_In_Paris.mp3',
description: 'A funky Jazz tune',
icon: new Image({
url: 'https://storage.googleapis.com/automotive-media/album_art.jpg',
alt: 'Album cover of an ocean view',
}),
}));
conv.ask(new Suggestions(['cancel']));
});
app.intent('Media Status', (conv) => {
const mediaStatus = conv.arguments.get('MEDIA_STATUS');
let response = 'Unknown media status received.';
if (mediaStatus && mediaStatus.status === 'FINISHED') {
response = 'Hope you enjoyed the tune! ';
}
conv.ask(response);
conv.ask('Media ended successfully');
conv.ask(new Suggestions(['exit']));
});
exports.dialogflowFirebaseFulfillment = functions.https.onRequest(app);
I tried to invoke another response on 'Media Status' intent.
app.intent('Media Status', (conv) => {
const mediaStatus = conv.arguments.get('MEDIA_STATUS');
let response = 'Unknown media status received.';
if (mediaStatus && mediaStatus.status === 'FINISHED') {
conv.ask(new MediaObject({
name: 'Jazz in Paris',
url: 'https://storage.googleapis.com/automotive-media/Jazz_In_Paris.mp3',
description: 'A funky Jazz tune',
icon: new Image({
url: 'https://storage.googleapis.com/automotive-media/album_art.jpg',
alt: 'Album cover of an ocean view',
}),
}));
conv.ask(new Suggestions(['cancel']));
});
}
});
Then "Webhook failed for intent: Media Status" error happend. How should I solve this problem? Thank you.

Answer 1

All responses that include a MediaObject must also include a SimpleResponse - which is usually just some text that is said before the Media.
For example, in the "Media Response" Intent Handler when you send your first MediaObject, you have the line:
conv.ask('This is a media response example.');
But this sort of line is missing from the "Media Status" Intent Handler.