CVV2Match.php

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<?php
namespace Magento\Paypal\Model\Payflow\Service\Response\Validator;

use Magento\Framework\DataObject;
use Magento\Paypal\Model\Payflow\Service\Response\ValidatorInterface;
use Magento\Paypal\Model\Payflow\Transparent;

class CVV2Match implements ValidatorInterface
{
    const CVV2MATCH = 'cvv2match';

    const AMT = 'amt';

    const ERROR_MESSAGE = 'Card security code does not match.';

    const RESPONSE_YES = 'y';

    const RESPONSE_NO = 'n';

    const RESPONSE_NOT_SUPPORTED = 'x';
    const CONFIG_ON = 1;

    const CONFIG_OFF = 0;

    const CONFIG_NAME = 'avs_security_code';
    public function validate(DataObject $response, Transparent $transparentModel)
    {
        if ($transparentModel->getConfig()->getValue(static::CONFIG_NAME) === static::CONFIG_OFF) {
            return true;
        }

        if ($this->isMatchCvv($response)) {
            return true;
        }

        if ($this->isNotMatchCvv($response)) {
            $response->setRespmsg(static::ERROR_MESSAGE);
            return false;
        }

        if ($this->isCvvDoNotExists($response)) {
            return true;
        }

        $response->setRespmsg(static::ERROR_MESSAGE);
        return false;
    }

    protected function isMatchCvv(DataObject $response)
    {
        $cvvMatch = strtolower((string) $response->getData(static::CVV2MATCH));
        return $cvvMatch === static::RESPONSE_YES || $cvvMatch === static::RESPONSE_NOT_SUPPORTED;
    }

    protected function isNotMatchCvv(DataObject $response)
    {
        return strtolower((string) $response->getData(static::CVV2MATCH)) === static::RESPONSE_NO;
    }

    protected function isCvvDoNotExists(DataObject $response)
    {
        return $response->getData(static::CVV2MATCH) == '';
    }
}