Dialogflow #vitalets/google-translate-api Translation not working - node.js

Question

I am using firebase and my translation doesn't working :(
I am not getting any response from it but other functions are working fine
here is my index.js
// See https://github.com/dialogflow/dialogflow-fulfillment-nodejs
// for Dialogflow fulfillment library docs, samples, and to report issues
'use strict';
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');
const translate = require('#vitalets/google-translate-api');
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 addTwoNo(agent) {
const sno = agent.parameters['sno'];
const fno = agent.parameters['fno'];
var sum = sno + fno ;
agent.add(`Sum is `+sum)
}
function tratext(agent) {
const text = agent.parameters['text'];
const lto = agent.parameters['lang-to'];
const lfrom = agent.parameters['lang-from'];
const ltoLen = lto.length > 0;
const lfromLen = lfrom.length > 0;
if(ltoLen){
translate(agent.text, {to: lto}).then(res => {
agent.add(res.text);
}).catch(err => {
console.error(err);
});
} else {
translate(agent.text, {to: 'en'}).then(res => {
agent.add(res.text);
}).catch(err => {
console.error(err);
});
}
translate(agent, {to: 'en'}).then(res => {
console.log(res.text);
//=> I speak English
console.log(res.from.language.iso);
//=> nl
}).catch(err => {
console.error(err);
});
}
// // Uncomment and edit to make your own intent handler
// // uncomment `intentMap.set('your intent name here', yourFunctionHandler);`
// // below to get this function to be run when a Dialogflow intent is matched
// function yourFunctionHandler(agent) {
// agent.add(`This message is from Dialogflow's Cloud Functions for Firebase editor!`);
// agent.add(new Card({
// title: `Title: this is a card title`,
// imageUrl: 'https://developers.google.com/actions/images/badges/XPM_BADGING_GoogleAssistant_VER.png',
// text: `This is the body text of a card. You can even use line\n breaks and emoji! 💁`,
// buttonText: 'This is a button',
// buttonUrl: 'https://assistant.google.com/'
// })
// );
// agent.add(new Suggestion(`Quick Reply`));
// agent.add(new Suggestion(`Suggestion`));
// agent.setContext({ name: 'weather', lifespan: 2, parameters: { city: 'Rome' }});
// }
// // Uncomment and edit to make your own Google Assistant intent handler
// // uncomment `intentMap.set('your intent name here', googleAssistantHandler);`
// // below to get this function to be run when a Dialogflow intent is matched
// function googleAssistantHandler(agent) {
// let conv = agent.conv(); // Get Actions on Google library conv instance
// conv.ask('Hello from the Actions on Google client library!') // Use Actions on Google library
// agent.add(conv); // Add Actions on Google library responses to your agent's response
// }
// // See https://github.com/dialogflow/fulfillment-actions-library-nodejs
// // for a complete Dialogflow fulfillment library Actions on Google client library v2 integration sample
// Run the proper function handler based on the matched Dialogflow intent name
let intentMap = new Map();
intentMap.set('Default Welcome Intent', welcome);
intentMap.set('addTwoNo', addTwoNo);
intentMap.set('Default Fallback Intent', fallback);
intentMap.set('tratext',tratext)
// intentMap.set('your intent name here', yourFunctionHandler);
// intentMap.set('your intent name here', googleAssistantHandler);
agent.handleRequest(intentMap);
});
and here is my package.json
{
"name": "dialogflowFirebaseFulfillment",
"description": "This is the default fulfillment for a Dialogflow agents using Cloud Functions for Firebase",
"version": "0.0.1",
"private": true,
"license": "Apache Version 2.0",
"author": "Google Inc.",
"engines": {
"node": "10"
},
"scripts": {
"start": "firebase serve --only functions:dialogflowFirebaseFulfillment",
"deploy": "firebase deploy --only functions:dialogflowFirebaseFulfillment"
},
"dependencies": {
"actions-on-google": "^2.2.0",
"firebase-admin": "^5.13.1",
"firebase-functions": "^2.0.2",
"dialogflow": "^0.6.0",
"dialogflow-fulfillment": "^0.5.0",
"#vitalets/google-translate-api": "^4.0.0"
}
}
I am using pay to go firebase
i tested using addTwoNo function and it is working but translate doesn't
I hope I get some help

Answer 1

It seems that, under your tratext function(agent), you are translating the "agent" instead of the "agent.text". You could try as following:
translate(agent.text, {to: 'en'}).then(res => {
console.log(res.text);
//=> I speak English
console.log(res.from.language.iso);
//=> nl
}).catch(err => {
console.error(err);
});
Also, in order to discard any issue with the translate api authentication, you could debug the translate api by translating a dummy text. I suggest you to try using this code snippet and verify the logs generated:
translate("Hola mundo", {to: 'en'}).then(res => {
console.log(res);
}).catch(err => {
console.error(err);
});
Finally, I found a github repository where a user shared a code snippet for translating text using the dialogflow fulfillment under NodeJS, that you may use for reference.