class Coupon
{
    /**
     * クーポンを使用ボタンを押したときの処理
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @global \usc_e_shop $usces
     * @return array
     */
    public function useCoupon() {
        global $usces;

        if (defined('WCEX_COUPON')) {
            $usces->error_message = coupon_check($usces->cart->get_entry());
            if (!empty($usces->error_message)) {
                return json_encode(['error' => $usces->error_message]);
            }
        }

        usces_get_entries();
        (new Fees())->setFees();

        return (new WelcartEntries())->getOrder();
    }

    /**
     * クーポン使用キャンセル
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return array
     */
    public function resetCoupon() {
        if (defined('WCEX_COUPON')) {
            unset($_SESSION['usces_entry']['order']['usedcoupon']);
        }

        (new Fees())->setFees();

        return (new WelcartEntries())->getOrder();
    }
}