<?php
/**
 * User: Rodion Abdurakhimov
 * Date: 24/6/16
 * Time: 13:51
 */

require($_SERVER["DOCUMENT_ROOT"].'/bitrix/modules/main/include/prolog_before.php');

$coupon = filter_input(INPUT_POST, 'coupon', FILTER_SANITIZE_STRING);
$result = [];

if (strlen($coupon) > 0) {
    try {
        $couponUsed = Epages\DiscountCoupons::getCouponStatus($coupon);

        if ($couponUsed == 'Y') {
            $result['error'] = "Купон $coupon уже занят";
        }

        $result['result'] = $couponStatus;
    } catch (\Exception $e) {
        $result['error'] = $e->getMessage();
    }
}

die(json_encode($result));