<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');

/**
 * Session Class
 */
class CI_Session {
	private $sess_cookie_name = 'ci_session';

	private $cookie_prefix = '';
	private $cookie_domain = '';
	private $cookie_path = '';

	private $userdata = array();
	private $CI;

	/**
	 * Session Constructor
	 */
	function __construct($params = array())
	{
		$this->CI =& get_instance();

		foreach (array('sess_cookie_name', 'cookie_prefix', 'cookie_domain', 'cookie_path') as $key) {
			$this->$key = isset($params[$key]) ? $params[$key] : $this->CI->config->item($key);
		}

		// Set the cookie name
		$this->sess_cookie_name = $this->cookie_prefix . $this->sess_cookie_name;

		// Get the session data
		$this->_cookie_read();
	}

	/**
	 * Add or change data in the "userdata" array
	 */
	function set_userdata($newdata = array(), $newval = '')
	{
		if (is_string($newdata)) {
			$newdata = array($newdata => $newval);
		}

		if (count($newdata) > 0) {
			foreach ($newdata as $key => $val) {
				$this->userdata[$key] = $val;
			}
		}
	}

	/**
	 * Delete a session variable from the "userdata" array
	 */
	function unset_userdata($newdata = array())
	{
		if (is_string($newdata)) {
			$newdata = array($newdata => '');
		}

		if (count($newdata) > 0) {
			foreach ($newdata as $key => $val) {
				unset($this->newdata[$key]);
			}
		}
	}

	/**
	 * Fetch a specific item from the session array
	 */
	function userdata($item)
	{
		return isset($this->userdata[$item]) ? $this->userdata[$item] : FALSE;
	}

	/**
	 * Fetch all session data
	 */
	function all_userdata()
	{
		return isset($this->userdata) ? $this->userdata : FALSE;
	}

	/**
	 * Create a new session
	 */
	function sess_create($userdata = NULL, $expire = 0)
	{
		if (is_array($userdata) && count($userdata))
			$this->set_userdata($userdata);

		$userdata = serialize($this->userdata);
		$sess_expiration = $expire ? $expire + time() : 0;

		// Set the cookie
		setcookie(
			$this->sess_cookie_name,
			$userdata,
			$sess_expiration,
			$this->cookie_path,
			$this->cookie_domain
		);
	}

	/**
	 * Destroy the current session
	 */
	function sess_destroy()
	{
		// Kill the cookie
		setcookie(
			$this->sess_cookie_name,
			'',
			time() - (60 * 60 * 24 * 30),
			$this->cookie_path,
			$this->cookie_domain
		);
	}

	/**
	 * Fetch the current session data if it exists
	 */
	private function _cookie_read()
	{
		$session = $this->CI->input->cookie($this->sess_cookie_name);

		if ($session === FALSE) {
			return FALSE;
		}

		$session = unserialize($session);

		if (!is_array($session)) {
			$this->sess_destroy();
			return FALSE;
		}

		// Session is valid
		$this->userdata = $session;

		return TRUE;
	}
}

// END Session Class
//
// /* End of file Session.php */
// /* Location: ./application/libraries/Session.php */