Text->Watson->Twilio->Phone Call

gistfile1.txt

var express = require('express');
var watson = require('watson-developer-cloud');
var fs = require('fs');
var router = express.Router();
var twilio = require('twilio');
var cfenv = require('cfenv');
var appEnv = cfenv.getAppEnv();
var AWS = require('aws-sdk'); 
AWS.config.update({accessKeyId: 'XXXXXX', secretAccessKey: 'XXXXXX'});

// This endpoint is called by Twilio to provide the call data
router.post('/:id/callaction', function(req, res, next) {
	var message = req.body.message;
	var file = req.param('id');
	
	res.contentType('application/xml');
	res.send('<?xml version="1.0" encoding="UTF-8"?><Response><Play>https://s3.amazonaws.com/CoffeeBeanBucket/'+file+'.wav</Play></Response>');
});

// This endpoint is used to perform the operation, JSON data is posted like so: {"message":"This is a test message","phonenumber":"5555555555"}
router.post('/send', function(req, res, next) {
	var message = req.body.message;
	var phonenumber = req.body.phonenumber;

	console.log("Sending message:" + message);

	var text_to_speech = watson.text_to_speech({
	  username: 'XXXXXXX',
	  password: 'XXXXXXX',
	  version: 'v1'
	});

	var params = {
	  text: message,
	  voice: 'VoiceEnUsMichael', // Optional voice
	  accept: 'audio/wav'
	};
	
	// convert the text to speech and save it on the disk
	var transcript = text_to_speech.synthesize(params);
	transcript.pipe(fs.createWriteStream('output.wav'));
	
	transcript.on('end', function () { 
		var s3 = new AWS.S3(); 

		// read the file off disk
  		fs.readFile('output.wav', function (err, data) {
  			var filename = Date.now();// + ".wav";
			var params = {Bucket: 'CoffeeBeanBucket', Key: filename+'.wav', Body: data, ACL:'public-read', ContentType:'audio/x-wav'};
			
			// upload the file to Amazon S3
			s3.putObject(params, function(err, data) {
				if (err)       
					console.log(err)     
				else{
					// when the file is uploaded, place the call
					var client = new twilio.RestClient('XXXXXX', 'XXXXXX');

					client.makeCall({
					    to: phonenumber,
					    from:'2162424007',
					    url: appEnv.url+'/voice/'+filename+'/callaction'
					}, function(err, call) {
						if (err){
							console.log("Twilio Error:" + err);
						}
					    console.log('This call\'s unique ID is: ' + call.sid);
					    console.log('This call was created at: ' + call.dateCreated);
					});
				}

			});
		});
	});

	res.json({"result":"okay"});
});

module.exports = router;