orderpaymentresolver.php

<?php
 
namespace Bitrix\Sale\Helpers\Controller\Action\Entity;
 
use Bitrix\Sale\Order;
use Bitrix\Sale\Payment;
use Bitrix\Sale\PaySystem;
 
final class OrderPaymentResolver
{
    public static function findOrCreatePaymentEqualOrderSum(int $orderId, ?int $paySystemId = null): ?Payment
    {
        if ($payment = self::findPaymentEqualOrderSum($orderId))
        {
            return $payment;
        }
 
        $order = Order::load($orderId);
        if (!$order)
        {
            return null;
        }
 
        if (!$service = self::buildPaySystemService($order, $paySystemId))
        {
            return null;
        }
 
        $paymentSum = $order->getPrice();
        $paymentCollection = $order->getPaymentCollection();
        $payment = $paymentCollection->createItem($service);
        $result = $payment->setField('SUM', $paymentSum);
 
        $result = $result->isSuccess() ? $order->save() : $result;
 
        if ($result->isSuccess())
        {
            return $payment;
        }
 
        return null;
    }
 
    private static function findPaymentEqualOrderSum(int $orderId): ?Payment
    {
        $order = Order::load($orderId);
        if (!$order)
        {
            return null;
        }
 
        $paymentSum = $order->getPrice();
 
        $filter = [
            'ORDER_ID' => $order->getId(),
            'SUM' => $paymentSum,
        ];
 
        $paymentRow = Payment::getList([
            'filter' => $filter,
            'select' => ['ORDER_ID', 'ID'],
            'limit' => 1
        ]);
        if ($paymentData = $paymentRow->fetch())
        {
            $paymentId = (int)$paymentData['ID'];
            $payment = $order->getPaymentCollection()->getItemById($paymentId);
 
            return $payment;
        }
        return null;
    }
 
    private static function buildPaySystemService(Order $order, ?int $paySystemId = null): ?PaySystem\Service
    {
        if ($paySystemId === null)
        {
            $paySystemId = self::getDefaultPaySystemId($order);
        }
 
        return PaySystem\Manager::getObjectById($paySystemId);
    }
 
    private static function getDefaultPaySystemId(Order $order): int
    {
        $paySystem = [];
        $paySystemList = PaySystem\Manager::getListWithRestrictionsByOrder($order);
 
        foreach ($paySystemList as $item)
        {
            if ($item['ACTION_FILE'] === 'cash')
            {
                $paySystem = $item;
                break;
            }
        }
 
        if (!$paySystem)
        {
            $paySystem = current($paySystemList);
        }
 
        return (int)$paySystem['ID'];
    }
}