Cc.php

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<?php
namespace Magento\Payment\Model\Method;

use Magento\Framework\DataObject;
use Magento\Quote\Api\Data\PaymentInterface;
use Magento\Quote\Model\Quote\Payment;

class Cc extends \Magento\Payment\Model\Method\AbstractMethod
{
    protected $_formBlockType = \Magento\Payment\Block\Form\Cc::class;

    protected $_infoBlockType = \Magento\Payment\Block\Info\Cc::class;

    protected $_canSaveCc = false;

    protected $_moduleList;

    protected $_localeDate;

    public function __construct(
        \Magento\Framework\Model\Context $context,
        \Magento\Framework\Registry $registry,
        \Magento\Framework\Api\ExtensionAttributesFactory $extensionFactory,
        \Magento\Framework\Api\AttributeValueFactory $customAttributeFactory,
        \Magento\Payment\Helper\Data $paymentData,
        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
        \Magento\Payment\Model\Method\Logger $logger,
        \Magento\Framework\Module\ModuleListInterface $moduleList,
        \Magento\Framework\Stdlib\DateTime\TimezoneInterface $localeDate,
        \Magento\Framework\Model\ResourceModel\AbstractResource $resource = null,
        \Magento\Framework\Data\Collection\AbstractDb $resourceCollection = null,
        array $data = []
    ) {
        parent::__construct(
            $context,
            $registry,
            $extensionFactory,
            $customAttributeFactory,
            $paymentData,
            $scopeConfig,
            $logger,
            $resource,
            $resourceCollection,
            $data
        );
        $this->_moduleList = $moduleList;
        $this->_localeDate = $localeDate;
    }

    public function validate()
    {
        /*
         * calling parent validate function
         */
        parent::validate();

        $info = $this->getInfoInstance();
        $errorMsg = false;
        $availableTypes = explode(',', $this->getConfigData('cctypes'));

        $ccNumber = $info->getCcNumber();

        // remove credit card number delimiters such as "-" and space
        $ccNumber = preg_replace('/[\-\s]+/', '', $ccNumber);
        $info->setCcNumber($ccNumber);

        $ccType = '';

        if (in_array($info->getCcType(), $availableTypes)) {
            if ($this->validateCcNum(
                $ccNumber
            ) || $this->otherCcType(
                $info->getCcType()
            ) && $this->validateCcNumOther(
                // Other credit card type number validation
                $ccNumber
            )
            ) {
                $ccTypeRegExpList = [
                    //Solo, Switch or Maestro. International safe
                    'SO' => '/(^(6334)[5-9](\d{11}$|\d{13,14}$))|(^(6767)(\d{12}$|\d{14,15}$))/',
                    'SM' => '/(^(5[0678])\d{11,18}$)|(^(6[^05])\d{11,18}$)|(^(601)[^1]\d{9,16}$)|(^(6011)\d{9,11}$)' .
                        '|(^(6011)\d{13,16}$)|(^(65)\d{11,13}$)|(^(65)\d{15,18}$)' .
                        '|(^(49030)[2-9](\d{10}$|\d{12,13}$))|(^(49033)[5-9](\d{10}$|\d{12,13}$))' .
                        '|(^(49110)[1-2](\d{10}$|\d{12,13}$))|(^(49117)[4-9](\d{10}$|\d{12,13}$))' .
                        '|(^(49118)[0-2](\d{10}$|\d{12,13}$))|(^(4936)(\d{12}$|\d{14,15}$))/',
                    // Visa
                    'VI' => '/^4[0-9]{12}([0-9]{3})?$/',
                    // Master Card
                    'MC' => '/^(?:5[1-5][0-9]{2}|222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}$/',
                    // American Express
                    'AE' => '/^3[47][0-9]{13}$/',
                    // Discover
                    'DI' => '/^(6011((0|9|[2-4])[0-9]{11,14}|(74|7[7-9]|8[6-9])[0-9]{10,13})|6(4[4-9][0-9]{13,16}|' .
                        '5[0-9]{14,17}))/',
                    'DN' => '/^3(0[0-5][0-9]{13,16}|095[0-9]{12,15}|(6|[8-9])[0-9]{14,17})/',
                    // UnionPay
                    'UN' => '/^622(1(2[6-9][0-9]{10,13}|[3-9][0-9]{11,14})|[3-8][0-9]{12,15}|9([[0-1][0-9]{11,14}|' .
                        '2[0-5][0-9]{10,13}))|62[4-6][0-9]{13,16}|628[2-8][0-9]{12,15}/',
                    // JCB
                    'JCB' => '/^35(2[8-9][0-9]{12,15}|[3-8][0-9]{13,16})/',
                    'MI' => '/^(5(0|[6-9])|63|67(?!59|6770|6774))\d*$/',
                    'MD' => '/^(6759(?!24|38|40|6[3-9]|70|76)|676770|676774)\d*$/',
                ];

                $ccNumAndTypeMatches = isset(
                    $ccTypeRegExpList[$info->getCcType()]
                ) && preg_match(
                    $ccTypeRegExpList[$info->getCcType()],
                    $ccNumber
                );
                $ccType = $ccNumAndTypeMatches ? $info->getCcType() : 'OT';

                if (!$ccNumAndTypeMatches && !$this->otherCcType($info->getCcType())) {
                    $errorMsg = __('The credit card number doesn\'t match the credit card type.');
                }
            } else {
                $errorMsg = __('Invalid Credit Card Number');
            }
        } else {
            $errorMsg = __('This credit card type is not allowed for this payment method.');
        }

        //validate credit card verification number
        if ($errorMsg === false && $this->hasVerification()) {
            $verifcationRegEx = $this->getVerificationRegEx();
            $regExp = isset($verifcationRegEx[$info->getCcType()]) ? $verifcationRegEx[$info->getCcType()] : '';
            if (!$info->getCcCid() || !$regExp || !preg_match($regExp, $info->getCcCid())) {
                $errorMsg = __('Please enter a valid credit card verification number.');
            }
        }

        if ($ccType != 'SS' && !$this->_validateExpDate($info->getCcExpYear(), $info->getCcExpMonth())) {
            $errorMsg = __('Please enter a valid credit card expiration date.');
        }

        if ($errorMsg) {
            throw new \Magento\Framework\Exception\LocalizedException($errorMsg);
        }

        return $this;
    }

    public function hasVerification()
    {
        $configData = $this->getConfigData('useccv');
        if ($configData === null) {
            return true;
        }
        return (bool)$configData;
    }

    public function getVerificationRegEx()
    {
        $verificationExpList = [
            'VI' => '/^[0-9]{3}$/',
            'MC' => '/^[0-9]{3}$/',
            'AE' => '/^[0-9]{4}$/',
            'DI' => '/^[0-9]{3}$/',
            'DN' => '/^[0-9]{3}$/',
            'UN' => '/^[0-9]{3}$/',
            'SS' => '/^[0-9]{3,4}$/',
            'SM' => '/^[0-9]{3,4}$/',
            'SO' => '/^[0-9]{3,4}$/',
            'OT' => '/^[0-9]{3,4}$/',
            'JCB' => '/^[0-9]{3,4}$/',
            'MI' => '/^[0-9]{3}$/',
            'MD' => '/^[0-9]{3}$/',
        ];
        return $verificationExpList;
    }

    protected function _validateExpDate($expYear, $expMonth)
    {
        $date = new \DateTime();
        if (!$expYear || !$expMonth || (int)$date->format('Y') > $expYear
            || (int)$date->format('Y') == $expYear && (int)$date->format('m') > $expMonth
        ) {
            return false;
        }
        return true;
    }

    public function assignData(\Magento\Framework\DataObject $data)
    {
        $additionalData = $data->getData(PaymentInterface::KEY_ADDITIONAL_DATA);
        if (!is_object($additionalData)) {
            $additionalData = new DataObject($additionalData ?: []);
        }

        $info = $this->getInfoInstance();
        $info->addData(
            [
                'cc_type' => $additionalData->getCcType(),
                'cc_owner' => $additionalData->getCcOwner(),
                'cc_last_4' => substr($additionalData->getCcNumber(), -4),
                'cc_number' => $additionalData->getCcNumber(),
                'cc_cid' => $additionalData->getCcCid(),
                'cc_exp_month' => $additionalData->getCcExpMonth(),
                'cc_exp_year' => $additionalData->getCcExpYear(),
                'cc_ss_issue' => $additionalData->getCcSsIssue(),
                'cc_ss_start_month' => $additionalData->getCcSsStartMonth(),
                'cc_ss_start_year' => $additionalData->getCcSsStartYear()
            ]
        );

        return $this;
    }

    public function otherCcType($type)
    {
        return $type == 'OT';
    }

    public function validateCcNum($ccNumber)
    {
        $cardNumber = strrev($ccNumber);
        $numSum = 0;

        for ($i = 0; $i < strlen($cardNumber); $i++) {
            $currentNum = substr($cardNumber, $i, 1);

            if ($i % 2 == 1) {
                $currentNum *= 2;
            }

            if ($currentNum > 9) {
                $firstNum = $currentNum % 10;
                $secondNum = ($currentNum - $firstNum) / 10;
                $currentNum = $firstNum + $secondNum;
            }

            $numSum += $currentNum;
        }

        return $numSum % 10 == 0;
    }

    public function validateCcNumOther($ccNumber)
    {
        return preg_match('/^\\d+$/', $ccNumber);
    }

    public function isAvailable(\Magento\Quote\Api\Data\CartInterface $quote = null)
    {
        return $this->getConfigData('cctypes', $quote ? $quote->getStoreId() : null) && parent::isAvailable($quote);
    }
}