gistfile1.php[345]

<?php

include(APPPATH.'libraries/facebook-client/facebook.php');

class Facebook_connect {

	private $_obj;
	private $_api_key		= NULL;
	private $_secret_key	= NULL;
	public 	$user 			= NULL;
	public 	$user_id 		= FALSE;
	public 	$session_ended 	= FALSE;
	
	public $fb;
	public $client;

	function Facebook_connect()
	{
		$this->_obj =& get_instance();

		$this->_obj->load->config('facebook');
		$this->_obj->load->library('session');
		
		$this->_api_key		= $this->_obj->config->item('facebook_api_key');
		$this->_secret_key	= $this->_obj->config->item('facebook_secret_key');
		;
		$this->fb = new Facebook($this->_api_key, $this->_secret_key);
		
		$this->client = $this->fb->api_client;
		
		$this->user_id = $this->fb->get_loggedin_user();
		
		$this->_manage_session();
	}

	private function _manage_session()
	{
		
		if($this->user_id){//test to make sure session is not expired
		    try {
		        $this->fb->api_client->fql_query('SELECT uid FROM user WHERE uid='.$this->user_id); //is it actually still fresh???
		    } catch (Exception $ex) {
		    	//if it's expired
		    	$this->fb->clear_cookie_state();
		       	$this->session_ended = TRUE;
		    }
		}
		
		$user = $this->_obj->session->userdata('facebook_user');
		
		if ( $user === FALSE && $this->user_id !== NULL ) //if there is id & facebook_user session hasn't been set yet
		{
			$this->session_ended = FALSE;
			$profile_data = array('uid','first_name', 'last_name', 'name', 'locale', 'pic_square', 'profile_url');
			$info = $this->fb->api_client->users_getInfo($this->user_id, $profile_data);

			$user = $info[0];

			$this->_obj->session->set_userdata('facebook_user', $user);
		}
		elseif ( $user !== FALSE && $this->user_id === NULL ) //logged in but logged out of fb, should redirect.
		{
			$this->fb->clear_cookie_state();
			$this->session_ended = TRUE;
		}
		
		if ( $user !== FALSE )//set $this->user variable...
		{
			$this->user = $user;
		}
	}
}