server.js

/**
* Copyright 2019 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const express = require('express');
const request = require('request');
const app = express();
const dialogflowSessionClient =
require('../botlib/dialogflow_session_client.js');
const bodyParser = require('body-parser');

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

//For authenticating dialogflow_session_client.js, create a Service Account and
// download its key file. Set the environmental variable
// GOOGLE_APPLICATION_CREDENTIALS to the key file's location.
//See https://dialogflow.com/docs/reference/v2-auth-setup and
// https://cloud.google.com/dialogflow/docs/setup for details.

const projectId = 'PRUEBA';
const phoneNumber = "14155238886";
const accountSid = 'AC2b4a7e397baff68fdf6a3b86837b7d0b';
const authToken = '4f67b167a1adceab80898a33d1bf9538';

const client = require('twilio')(accountSid, authToken);
const MessagingResponse = require('twilio').twiml.MessagingResponse;
const sessionClient = new dialogflowSessionClient(projectId);

const listener = app.listen(process.env.PORT, function() {
console.log('Your Twilio integration server is listening on port '
+ listener.address().port);
});

app.post('/', async function(req, res) {
const body = req.body;
const text = body.Body;
const id = body.From;
const dialogflowResponse = (await sessionClient.detectIntent(
text, id, body)).fulfillmentText;
const twiml = new MessagingResponse();
const message = twiml.message(dialogflowResponse);
res.send(twiml.toString());
});

process.on('SIGTERM', () => {
listener.close(() => {
console.log('Closing http server.');
process.exit(0);
});
});