app.js

calls = require('./calls')

srf.invite((req, res) => {
  const ms = req.app.locals.ms;
  ms.connectCaller(req, res, next)
    .then(({endpoint, dialog}) => {
      setHandlers(req, res, dialog, endpoint)

      to = calls.parseURI(req.msg.headers.to);
      to_number = calls.convertToE164(to.user)

      calls.check_is_valid(to_number)
      .then((number) => {
        if (!number) {
          console.log(`[${req.callid}] ${to_number} does not match`)
          calls.playback_failure(endpoint)
          .then(() => {
            hangup(endpoint, dialog, req.callid);
            // Stop execution somehow?
          });
        }
        console.log("Never get here")
      });
    }); // End ms.ConnectCaller
}); // End invite

function hangup(endpoint, dialog, call_id) {
  if (call_id) console.log(`[${call_id}] Destroying ${call_id} from hangup function`)
  if (dialog) dialog.destroy()
  if (endpoint) endpoint.destroy
  return true
}

function setHandlers(req, res, dialog, endpoint) {
  dialog.on('destroy', () => {
    console.log(`Received BYE, deleting ${req.callid}`)
    endpoint.destroy();
    //  calls.delete_call(req.call_id);
  });

}