bebeboutik/override/classes/OrderReturn.php

<?php
class OrderReturn extends OrderReturnCore {

    public static function getOrderDetailReturnQty($product, $id_state = 0) {
        if(Db::getInstance()->getRow('
            SELECT `id_order`
            FROM `'._DB_PREFIX_.'shipping_history`
            WHERE `id_order` = '.(int) $product['id_order'].'
            AND `id_sale` = '.(int) $product['id_sale'].'
        ') || ($id_state != 0 && $id_state == 4)) {
            $qty = (int) $product['product_quantity'] - max((int) $product['product_quantity_refunded'], (int) $product['product_quantity_return']);
        } else {
            $qty = (int) Db::getInstance()->getValue('
                SELECT SUM(`quantity`)
                FROM `'._DB_PREFIX_.'lapostews`
                WHERE `id_order_detail` = '.(int) $product['id_order_detail'].'
            ') + (int) Db::getInstance()->getValue('
                SELECT SUM(`quantity`)
                FROM `'._DB_PREFIX_.'mondialrelay_parcel`
                WHERE `id_order_detail` = '.(int) $product['id_order_detail'].'
            ') + (int) Db::getInstance()->getValue('
                SELECT SUM(`quantity`)
                FROM `'._DB_PREFIX_.'philea_parcel`
                WHERE `id_order_detail` = '.(int) $product['id_order_detail'].'
            ') - max($product['product_quantity_return'], $product['product_quantity_refunded']);
        }
        $qty -= (int) Db::getInstance()->getValue('
            SELECT SUM(d.`product_quantity`)
            FROM `'._DB_PREFIX_.'order_return_detail` d
            LEFT JOIN `'._DB_PREFIX_.'order_return` r
            ON d.`id_order_return` = r.`id_order_return`
            WHERE d.`id_order_detail` = '.(int) $product['id_order_detail'].'
            AND r.`state` < 3
        ');
        return $qty;
    }
}