khosb/modules/cart/classes/Model/Cart.php

<?php defined('SYSPATH') or die('No direct access allowed.');

/**
 * This class supports a product cart
 *
 * @package    Cart
 * @category   Models
 * @author     Deon George
 * @copyright  (c) 2009-2013 Open Source Billing
 * @license    http://dev.osbill.net/license.html
 */
class Model_Cart extends ORM {
	// Cart doesnt use the update column
	protected $_updated_column = FALSE;

	protected $_belongs_to = array(
		'product'=>array(),
		'module'=>array(),
	);

	protected $_serialize_column = array(
		'module_data',
	);

	/**
	 * Filters used to format the display of values into friendlier values
	 */
	protected $_display_filters = array(
		'recurr_schedule'=>array(
			array('StaticList_RecurSchedule::get',array(':value')),
		),
	);

	public function checkout() {
		if (! method_exists($this->mo(),'checkout'))
			throw new Kohana_Exception('Module :module doesnt implement checkout?',array(':module'=>get_class($this->mo)));

		return $this->mo()->checkout();
	}

	public function item() {
		if (! method_exists($this->mo(),'cart_item'))
			throw new Kohana_Exception('Module :module doesnt implement cart_item?',array(':module'=>get_class($this->mo)));

		return $this->mo()->cart_item();
	}

	public function mo() {
		return $this->module->instance($this->module_item);
	}

	public function motype() {
		return strtolower(preg_replace('/^Model_/','',get_class($this->mo())));
	}
}
?>