/**
* @singleton method used to instantiate class object
* @access public
* @return class instance
*/
public static function instance(EE_Line_Item $grand_total = NULL)
{
// check if class object is instantiated
if (!self::$_instance instanceof EE_Cart) {
//try getting the cart out of the session
$saved_cart = empty($grand_total) ? EE_Registry::instance()->SSN->get_session_data('cart') : NULL;
self::$_instance = $saved_cart instanceof EE_Cart ? $saved_cart : new self($grand_total);
unset($saved_cart);
}
// once everything is all said and done, save the cart to the EE_Session
add_action('shutdown', array(self::$_instance, 'save_cart'), 90);
return self::$_instance;
}
/**
* Resets the cart completely (whereas empty_cart
* @param EE_Line_Item $grand_total
* @return EE_Cart
*/
public static function reset(EE_Line_Item $grand_total = NULL)
{
remove_action('shutdown', array(self::$_instance, 'save_cart'), 90);
EE_Registry::instance()->SSN->reset_cart();
self::$_instance = NULL;
return self::instance($grand_total);
}
/**
* Resets the cart completely (whereas empty_cart
* @param EE_Line_Item $grand_total
* @param EE_Session $session
* @return EE_Cart
*/
public static function reset(EE_Line_Item $grand_total = null, EE_Session $session = null)
{
remove_action('shutdown', array(self::$_instance, 'save_cart'), 90);
if ($session instanceof EE_Session) {
$session->reset_cart();
}
self::$_instance = null;
return self::instance($grand_total, $session);
}
