Easy facebook component

FBCore.php

<?php
#Facebook component
class FBCore extends CApplicationComponent {

        //we want to use setters and getter for the public vars.
        protected $_appId;
        protected $_appSecret;

        //this won't be set via config properties!
        protected $_facebook;

        public function init()
        {
                parent::init();
        }

        // this can be called the Facebook singleton :)
        // it will instantiate the facebook original lib and return a reference to it.
        public function getFacebook()
        {
                if($this->_facebook!==null)
                        return $this->_facebook;

                Yii::import('path.to.the.PHPSDK.Facebook');
                $this->_facebook=new Facebook(array(
                        'appId'=>$this->getAppId(),
                        'secret'=>$this->getAppSecret(),
                ));

                return $this->_facebook;
        }

        // this will be called right at component initialization, 
        // thus making $this->_appId available in the component.
        public function setAppId($str)
        {
                $this->_appId=$str;
        }

        public function getAppId()
        {
                return $this->_appId;
        }

        public function setAppSecret($str)
        {
                $this->_appSecret=$str;
        }

        public function getAppSecret()
        {
                return $this->_appSecret;
        }

        // now, as far as i know the original facebook library has some nice methods, so why write them here again ?
        // instead, let's make use of PHP's __call function and call those methods 
        // basically, this is like a class inheritance(class FBCore extends Facebook)

        // note, __call() will be called only if a requested method doesn't exists in this component class.
        public function __call($method, $args)
        {
                $facebook=$this->getFacebook();
                // if the method exists in the fb class, call it, otherwise let PHP handle the error.
                if(method_exists($facebook, $method))
                {
                        return call_user_func_array(array($facebook, $method), $args);
                }
        }

}
?>

With the above implementation, you can use FB like:

Yii::app()->fbcore->getUser();
// in this case, __call will be called because your component does not have a method called getUser() but facebook class does.

Yii::app()->fbcore->facebook->getUser();
// in this case you access the fb lib directly, thus __call won't be called.