Node.js聊天-用户认证

// server.js
everyone.now.joinChat = function(cookie) {
    chat.add(this, cookie);
}

everyone.now.serverMessage = function(message) {
    if (chat.hasUser(this)) {
        chat.broadcast(message);
    }
}

chat = (function() {
    var users = [];

    return {
         \"add\": function(client) {
             users.push(client);
         },
         \"hasUser\": function(client) {
             return users.some(function(user) {
                 return user === client;
             });
         },
         \"broadcast\": function(message) {
              users.each(function(user) {
                  user.clientMessage(message);
              });
         }
    }
}());

// client.js
$(function() {
    now.joinChat($.cookie(\"login\"));

    $(\"#send\").click(function() {
         now.serverMessage($(this).data(\"message\"));
    });

    now.clientMessage = function(message) {
         $(\"#messages\").append($(\"<span></span>\").text(message));
    }

});