Custom Dialogflow Fulfillment response - dialogflow-es

Question

I am trying to return an object as a response from Dialogflow fulfillment.
I wanted to return some object to be handled later by my front end but I am getting an error:
Error: Unknown response type: "{"fruit1": "apple", "fruit2":
"orange"}";
It's likely that I may be doing it wrong. Here's the code that I have, problem is on function intent1f.
use strict';
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');
process.env.DEBUG = 'dialogflow:debug'; // enables lib debugging statements
exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
const agent = new WebhookClient({ request, response });
console.log('Dialogflow Request headers: ' + JSON.stringify(request.headers));
console.log('Dialogflow Request body: ' + JSON.stringify(request.body));
function welcome(agent) {
agent.add(`Welcome to my agent!`);
}
function fallback(agent) {
agent.add(`I didn't understand`);
agent.add(`I'm sorry, can you try again?`);
}
function intent1f(agent) {
var someObject = {"fruit1": "apple",
"fruit2": "orange"};
agent.add(someObject);
}
let intentMap = new Map();
intentMap.set('Default Welcome Intent', welcome);
intentMap.set('Default Fallback Intent', fallback);
intentMap.set('intent1', intent1f);
// intentMap.set('your intent name here', googleAssistantHandler);
agent.handleRequest(intentMap);
});
Is there a way where I can return an object / self defined json via Dialogflow Fulfillment? agent.add() seems to only accept strings but I may be wrong.

Answer 1

function intent1f(agent) {
var someObject = {
"fruit1": "apple",
"fruit2": "orange"
};
agent.add(JSON.stringify(someObject));
}
On your client side you can use JSON.parse() to have same object.