"Translate" a php class from oscommerce to Prestashop

Hello, Maybe you already known oscommerce orders class, I need the same for Prestashop. Object will called like this : $order = new order($my_orders_id); Required variables: $order->totals $order->info $order->customer $order->billing $order->delivery $order->products Take care, all required variables must have same names and formats than oscommerce. I need this class in order to make work my orders manager with Prestashop without change existing scripts.