genice.js

/**
  ### `rtc-core/genice`

  Respond appropriately to options that are passed to packages like
  `rtc-quickconnect` and trigger a `callback` (error first) with iceServer
  values.

  The function looks for either of the following keys in the options, in
  the following order or precedence:

  1. `ice` - this can either be an array of ice server values or a generator
     function (in the same format as this function).  If this key contains a
     value then any servers specified in the `iceServers` key (2) will be
     ignored.

  2. `iceServers` - an array of ice server values.
**/
module.exports = function(opts, callback) {
  var ice = (opts || {}).ice;
  var iceServers = (opts || {}).iceServers;

  if (typeof ice == 'function') {
    return ice(opts, callback);
  }
  else if (Array.isArray(ice)) {
    return callback(null, [].concat(ice));
  }

  callback(null, [].concat(iceServers || []));
};