UpdateCashboxesOnBusinessValueUpdate::executeEvent

public function executeEvent(): SaleResult
{
	$valueUnchanged =
		isset($this->oldMapping['PROVIDER_VALUE'], $this->newMapping['PROVIDER_VALUE'])
		&& $this->oldMapping['PROVIDER_VALUE'] === $this->newMapping['PROVIDER_VALUE']
	;
	$isPaySystemValue = isset($this->consumerKey) && mb_strpos($this->consumerKey, Service::PAY_SYSTEM_PREFIX) === 0;

	if (empty($this->oldMapping) || $valueUnchanged || !$isPaySystemValue)
	{
		return new SaleResult();
	}

	$paySystemIterator = SalePaySystemManager::getList([
		'filter' => [
			'=ACTIVE' => 'Y',
		]
	]);

	while ($paySystemItem = $paySystemIterator->fetch())
	{
		$this->currentPaySystemService = new Service($paySystemItem);
		if ($this->currentPaySystemService->getConsumerName() !== $this->consumerKey || !($this->currentPaySystemService->isSupportPrintCheck()))
		{
			continue;
		}

		/** @var SaleCashboxCashboxPaySystem $cashboxClass */
		$cashboxClass = $this->currentPaySystemService->getCashboxClass();
		$paySystemCodeForKkm = $cashboxClass::getPaySystemCodeForKkm();
		if ($paySystemCodeForKkm !== $this->codeKey)
		{
			continue;
		}

		$cashboxesToChange = $this->getListOfCashboxesToChange();

		$newKkmId = $this->newMapping['PROVIDER_VALUE'];

		if ($this->valueHasBeenCleared())
		{
			$newKkmId = $this->getNewKkmId();

			/*
			 * if we can't set a new ID, then it's
			 * impossible to use an existing cashbox
			 * or create a new one, so we have to
			 * delete the old cashbox
			 */
			if (empty($newKkmId))
			{
				$this->deleteCashboxesToChange();
				continue;
			}

			$existingCashboxes = SaleCashboxManager::getList([
				'select' => ['ID', 'KKM_ID'],
				'filter' => [
					'=HANDLER' => $cashboxClass,
					'=KKM_ID' => $newKkmId,
				],
			]);

			/**
			 * If any cashboxes with the default ID exist, we can use them
			 * We don't need any cashboxes with the old ids, and we
			 * also don't need to edit any cashboxes as the needed ones
			 * exist already
			 */
			if ($existingCashboxes->fetch())
			{
				$this->deleteCashboxesToChange();
				continue;
			}
		}

		foreach ($cashboxesToChange as $cashboxItem)
		{
			SaleCashboxManager::update($cashboxItem['ID'], ['KKM_ID' => $newKkmId]);
		}
	}

	return new SaleResult();
}