Twilio Voicemail to Email via SendGrid

VoicemailToEmail

exports.handler = function(context, event, callback) {
    const sgMail = require('@sendgrid/mail');
    sgMail.setApiKey(context.SG_API_KEY);
    let spam = 0;
    if(event.AddOns){
        const addOns = JSON.parse(event.AddOns);
    
        if (('nomorobo_spamscore' in addOns.results)) {
            spam = addOns.results.nomorobo_spamscore.result.score;
        }
    }

  
  // REQUIRED - you must set this
  let phoneNumber = "sip:uri@dmail.com";  
  
  // generate the TwiML to tell Twilio how to forward this call
  let twiml = new Twilio.twiml.VoiceResponse();
  
  //The caller is sent to voicemail if the function is called by the action handler and the DialCallStatus does not equal completed.
  
  if(typeof(event.DialCallStatus) != 'undefined' && event.DialCallStatus !== 'completed'){
    twiml.say("Please leave a message and I will call you back as soon as possible.");
    twiml.record({
        timeout: 60,
        transcribe: true,
        transcribeCallback: "/deskphone_voicemail"
    });
    
    // return the TwiML
    callback(null, twiml);
    
  // This code block is only fired when the TranscriptionSid is present in the event. 
  
  }else if(event.TranscriptionSid){
      let client = context.getTwilioClient();
      client.transcriptions(event.TranscriptionSid).fetch().then(transcription => {
          const msg = {
              to: 'you@example.com',
              from: 'noreply@example.com',
              subject: 'new voicemail',
              templateId: 'd-XXXXXXXXX',
              dynamic_template_data: {
                From: event.From,
                Time: Date(transcription.dateCreated),
                RecordingUrl: event.RecordingUrl,
                Transcription: transcription.transcriptionText
            }
          };
         return sgMail.send(msg);
      }).then(done => {
          callback(null);
      });
   // If the call completes successfully this block is called and the the function stops
  }else if(event.DialCallStatus === 'completed'){
    console.log("call complete");
    callback(null);
    
  // This code block is fired on a new inbound call. If the nomospam addon is present, the spam score will be evaluated. 
  
  }else{
      if (spam === 0) {
    let dial = twiml.dial({
      timeout: 14,
      method: 'POST',
      action: '/deskphone_voicemail'
    });
    
    dial.sip(phoneNumber);
    }else {
        twiml.say('Sorry, you are calling from a restricted number. Good bye.');
    }
  
    // return the TwiML
    callback(null, twiml);
  }
};