【EC-CUBE2.13】新しく追加した商品種別の商品を通常商品と同じカートに追加する方法

SC_CartSession_Ex.php

<?php
/*
 * This file is part of EC-CUBE
 *
 * Copyright(c) 2000-2014 LOCKON CO.,LTD. All Rights Reserved.
 *
 * http://www.lockon.co.jp/
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

require_once CLASS_REALDIR . 'SC_CartSession.php';

class SC_CartSession_Ex extends SC_CartSession
{
    /**
     * マスターデータ管理でサンプル商品の商品種別を追加してそのIDが3の場合
    */
    const PRODUCT_TYPE_SAMPLE = 3;
    
    // カートへの商品追加
    public function addProduct($product_class_id, $quantity)
    {
        $objProduct = new SC_Product_Ex();
        $arrProduct = $objProduct->getProductsClass($product_class_id);
        $productTypeId = $arrProduct['product_type_id'];

        // サンプル商品が追加された時、通常商品と同じカートに入れる
        if($arrProduct['product_type_id'] == self::PRODUCT_TYPE_SAMPLE) {
            $productTypeId = PRODUCT_TYPE_NORMAL;
        }
		
		$find = false;
        $max = $this->getMax($productTypeId);
        for ($i = 0; $i <= $max; $i++) {
            if ($this->cartSession[$productTypeId][$i]['id'] == $product_class_id) {
                $val = $this->cartSession[$productTypeId][$i]['quantity'] + $quantity;
                if (strlen($val) <= INT_LEN) {
                    $this->cartSession[$productTypeId][$i]['quantity'] += $quantity;
                }
                $find = true;
            }
        }
        if (!$find) {
            $this->cartSession[$productTypeId][$max+1]['id'] = $product_class_id;
            $this->cartSession[$productTypeId][$max+1]['quantity'] = $quantity;
            $this->cartSession[$productTypeId][$max+1]['cart_no'] = $this->getNextCartID($productTypeId);
        }
    }
}