<?php
/**
 * Event_Handler_Shop_Cart
 *
 *
 * $Id: ITS.php 1611 2014-04-14 08:22:22Z gerd $
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

WBClass::load('WBEvent_Handler'
, 'WBEvent_Handler_Shop');

/**
 * Event_Handler_Shop
 *
 * An empty event handler
 *
 * @version 0.1.1
 * @package WB
 * @subpackage base
 * @deprecated in favour of ValueAce
 */
class WBEvent_Handler_Shop_Cart extends WBEvent_Handler_Shop
{
    /**
     * handler config
     *
     * Parameters:
     *  - loadcart: this parameter holds the id-fields name to load cart data
     *
     * @var array
     */
    protected $config   =   array(
                                'loadcart'  =>  ''
                                );

    /**
     * @var WBShop_Cart
     */
    protected $cart;

    /**
     * constructor
     *
     */
    public function __construct()
    {
        $params         =   array();
        $params['mode'] =   WBShop_Cart::CART_MODE_ADMIN;
        $this->cart     =   WBClass::create('WBShop_Cart', $params);
        // set dummy user
        $this->cart->setUser('1');
    }

    /**
     * Load Cart
     *
     * Check config -> "loadcart". If not empty, get cart's id from event data where "loadcart"
     * points to.
     *
     * @param WBEvent $e
     */
    protected function loadCart($e)
    {
        // no need to load
        if (empty($this->config['loadcart'])) {
            return;
        }

        $id =   $e->get($this->config['loadcart'], '');
        if (empty($id)) {
            $ex =   array(
                        'msg'   =>  'Loading cart failed - cart id is empty',
                        'code'  =>  1,
                        'class' =>  __CLASS__
                    );
            throw WBClass::create('WBException_Config', $ex);
        }

        $this->cart->load($id, false, true);

        if ('__new' == $this->cart->getId()) {
            $ex =   array(
                        'msg'   =>  'Loading cart failed - cart not found',
                        'code'  =>  2,
                        'class' =>  __CLASS__
                    );
            throw WBClass::create('WBException_Datasource', $ex);
        }
    }

    /**
     * Merge Cart's Data With Event
     *
     * Add cart data to event data and prefix keys with "cart_"
     * @param WBEvent $e
     */
    protected function mergeCartData($e)
    {
        $cart   =   $this->cart->get();
        foreach ($cart as $k => $v) {
            $e->set('cart_' . $k, $v);
        }
    }
}