<?php
require_once 'CartListenerInterface.php';
class PresentListener implements CartListenerInterface
{
private static $_PRESENT_TARGET_ITEM = '30:クッキーセット';
private static $_PRESENT_ITEM = '99:プレゼント';
public function update(Cart $cart)
{
if ($cart->hasItem(self::$_PRESENT_TARGET_ITEM) && !$cart->hasItem(self::$_PRESENT_ITEM)) {
$cart->addItem(self::$_PRESENT_ITEM);
}
if (!$cart->hasItem(self::$_PRESENT_TARGET_ITEM) && $cart->hasItem(self::$_PRESENT_ITEM)) {
$cart->removeItem(self::$_PRESENT_ITEM);
}
}
}