Twilio simple PBX function

twilio-pbx-fn.js

exports.handler = function(context, event, callback) {
  const moment = require('moment');

  //// Useful for debugging
  //const util = require('util');
  //console.log(util.inspect(context.getTwilioClient()));
  //console.log(util.inspect(event));
  
  // be sure to update numDigits below to match, or delete it for variable length
  let phoneBook = {
    "888" : "+1-800-800-8000", // super 8 motel
    "666" : "+1-800-466-8356", // motel 6
    "000" : null
  };
  let callerId = event.Caller; // || "+1-000-000-0000"; // default caller ID
  let digits   = event.Digits;
  
  let twiml = new Twilio.twiml.VoiceResponse();

  if (digits && phoneBook[digits]) {
    twiml.say("Dialing extension " + digits);
    twiml.dial({ callerId: callerId }, phoneBook[digits]);
    twiml.hangup();
  }

  // Twilio time is in UTC. This allows 10 am to 7 pm PDT, or 9 am to 6 pm PST, weekdays.
  // Twilio doesn't seem to have https://momentjs.com/timezone/ installed.
  if ((moment().hour() >= 17 || moment().hour() < 2) && moment().isoWeekday() <= 5) {
    let gather = twiml.gather({ numDigits: 3, timeout: 3 });
    gather.say("Thank you for calling COMPANY NAME. Please dial your party's extension, or, hold, to leave a message.");
  } else {
    twiml.say("Thank you for calling COMPANY NAME. You have reached us outside business hours.");
  }
  twiml.redirect("http://twimlets.com/voicemail?Email=[YOUR-EMAIL]&Message=Please%20leave%20a%20message.&Transcribe=true");
  callback(null, twiml);
};