rtc-quickconnect/lib/schemes.js

Create a WebRTC connection in record time

var rtc = require('rtc-tools');
var debug = rtc.logger('rtc-quickconnect');

/**
  Schemes allow multiple connection schemes for selection when attempting to connect to
  a peer
 **/
module.exports = function(signaller, opts) {

  var schemes = {};
  var _default;

  /**
    Adds a connection scheme
   **/
  function add(scheme) {
    // Ensure valid ID
    if (!scheme || !scheme.id || typeof scheme.id !== 'string') {
      throw new Error('Cannot add invalid scheme. Requires at least an ID');
    }
    // Unique schemes
    if (schemes[scheme.id]) {
      throw new Error('Scheme ' + schemeId + ' already exists');
    }
    // Check default
    if (scheme.isDefault) {
      if (_default) {
        console.warn('Default scheme already exists');
      } else {
        _default = scheme.id;
      }
    }

    schemes[scheme.id] = scheme;
  }

  /**
    Returns the scheme with the given ID. If canDefault is true it will return the default scheme
    if no scheme with ID is found
   **/
  function get(id, canDefault) {
    return schemes[id] || (canDefault && _default ? schemes[_default] : undefined);
  }

  // Load passed in schemes
  if (opts && opts.schemes && Array.isArray(opts.schemes)) {
    opts.schemes.forEach(add);
  }

  return {
    add: add,
    get: get
  };
};