rtc-pluggable-signaller/index.js

Use either rtc-signaller or your own signaller which matches the signaller API

/**
  # rtc-pluggable-signaller

  By using `rtc-pluggable-signaller` in your code, you provide the ability
  for your package to customize which signalling client it uses (and
  thus have significant control) over how signalling operates in your
  environment.

  ## How it Works

  The pluggable signaller looks in the provided `opts` for a `signaller`
  attribute.  If the value of this attribute is a string, then it is
  assumed that you wish to use the default
  [`rtc-signaller`](https://github.com/rtc-io/rtc-signaller) in your
  package.  If, however, it is not a string value then it will be passed
  straight back as the signaller (assuming that you have provided an
  object that is compliant with the rtc.io signalling API).

**/
module.exports = function(opts) {
  var signaller = (opts || {}).signaller;
  var messenger = (opts || {}).messenger || require('rtc-switchboard-messenger');

  if (typeof signaller == 'string' || (signaller instanceof String)) {
    return require('rtc-signaller')(messenger(signaller, opts), opts);
  }

  return signaller;
};