server/www/session.js

function Session(modules) {
  var key = null;
  var name = null;
  var keys = JSON.parse(localStorage.getItem('keys')) || generateKeyPair();

  modules.messaging.addEventListener(["Welcome"], function(o) {
    key = o.key;
  });

  modules.messaging.addEventListener(["Relay", "LogIn"], function(o) {
    if(is(o.from)) {
      name = o.message.name;
    }
  });

  return {
    is: is,
    getKey: getKey,
    loggedIn: loggedIn
  };

  function is(sessionKey) {
    return key == sessionKey;
  }

  function getKey() {
    return key;
  }

  function loggedIn() {
    return name != undefined;
  }

  function generateKeyPair() {
    var crypt = new JSEncrypt({default_key_size: 1024});
    crypt.getKey();
    return {
      priv: crypt.getPrivateKey(),
      pub: crypt.getPublicKey()
    };
  }
}