Direct.php

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<?php
namespace Magento\Paypal\Model;

use Magento\Quote\Api\Data\PaymentInterface;
use Magento\Sales\Model\Order\Payment;

class Direct extends \Magento\Payment\Model\Method\Cc
{
    protected $_code = \Magento\Paypal\Model\Config::METHOD_WPP_DIRECT;

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

    protected $_isGateway = true;

    protected $_canAuthorize = true;

    protected $_canCapture = true;

    protected $_canCapturePartial = true;

    protected $_canRefund = true;

    protected $_canRefundInvoicePartial = true;

    protected $_canVoid = true;

    protected $_canUseInternal = true;

    protected $_canUseCheckout = true;

    protected $_canSaveCc = false;

    protected $_canFetchTransactionInfo = true;

    protected $_canReviewPayment = true;

    protected $_pro;

    protected $_storeManager;

    protected $_urlBuilder;

    protected $_requestHttp;

    protected $_cartFactory;

    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\Paypal\Model\ProFactory $proFactory,
        \Magento\Store\Model\StoreManagerInterface $storeManager,
        \Magento\Framework\UrlInterface $urlBuilder,
        \Magento\Framework\App\RequestInterface $requestHttp,
        \Magento\Paypal\Model\CartFactory $cartFactory,
        \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,
            $moduleList,
            $localeDate,
            $resource,
            $resourceCollection,
            $data
        );
        $this->_storeManager = $storeManager;
        $this->_urlBuilder = $urlBuilder;
        $this->_requestHttp = $requestHttp;
        $this->_cartFactory = $cartFactory;

        $proInstance = array_shift($data);
        if ($proInstance && $proInstance instanceof \Magento\Paypal\Model\Pro) {
            $this->_pro = $proInstance;
        } else {
            $this->_pro = $proFactory->create();
        }
        $this->_pro->setMethod($this->_code);
    }

    public function setStore($store)
    {
        $this->setData('store', $store);
        if (null === $store) {
            $store = $this->_storeManager->getStore()->getId();
        }
        $this->_pro->getConfig()->setStoreId(is_object($store) ? $store->getId() : $store);
        return $this;
    }

    public function canUseForCurrency($currencyCode)
    {
        return $this->_pro->getConfig()->isCurrencyCodeSupported($currencyCode);
    }

    public function getConfigPaymentAction()
    {
        return $this->_pro->getConfig()->getPaymentAction();
    }

    public function getAllowedCcTypes()
    {
        $ccTypes = explode(',', $this->_pro->getConfig()->getValue('cctypes'));
        $country = $this->_pro->getConfig()->getMerchantCountry();

        if ($country == 'GB') {
            $ccTypes = array_intersect(['SM', 'SO', 'MC', 'DI', 'VI'], $ccTypes);
        } elseif ($country == 'CA') {
            $ccTypes = array_intersect(['MC', 'VI'], $ccTypes);
        }
        return implode(',', $ccTypes);
    }

    public function isAvailable(\Magento\Quote\Api\Data\CartInterface $quote = null)
    {
        return parent::isAvailable($quote) && $this->_pro->getConfig()->isMethodAvailable();
    }

    public function getConfigData($field, $storeId = null)
    {
        $value = null;
        switch ($field) {
            case 'cctypes':
                $value = $this->getAllowedCcTypes();
                break;
            case 'order_place_redirect_url':
                $value = $this->getOrderPlaceRedirectUrl();
                break;
            default:
                $value = $this->_pro->getConfig()->getValue($field);
        }
        return $value;
    }

    public function authorize(\Magento\Payment\Model\InfoInterface $payment, $amount)
    {
        return $this->_placeOrder($payment, $amount);
    }

    public function void(\Magento\Payment\Model\InfoInterface $payment)
    {
        $this->_pro->void($payment);
        return $this;
    }

    public function capture(\Magento\Payment\Model\InfoInterface $payment, $amount)
    {
        if (false === $this->_pro->capture($payment, $amount)) {
            $this->_placeOrder($payment, $amount);
        }
        return $this;
    }

    public function refund(\Magento\Payment\Model\InfoInterface $payment, $amount)
    {
        $this->_pro->refund($payment, $amount);
        return $this;
    }

    public function cancel(\Magento\Payment\Model\InfoInterface $payment)
    {
        $this->void($payment);

        return $this;
    }

    public function canReviewPayment()
    {
        return parent::canReviewPayment() && $this->_pro->canReviewPayment($this->getInfoInstance());
    }

    public function acceptPayment(\Magento\Payment\Model\InfoInterface $payment)
    {
        parent::acceptPayment($payment);
        return $this->_pro->reviewPayment($payment, \Magento\Paypal\Model\Pro::PAYMENT_REVIEW_ACCEPT);
    }

    public function denyPayment(\Magento\Payment\Model\InfoInterface $payment)
    {
        parent::denyPayment($payment);
        return $this->_pro->reviewPayment($payment, \Magento\Paypal\Model\Pro::PAYMENT_REVIEW_DENY);
    }

    public function fetchTransactionInfo(\Magento\Payment\Model\InfoInterface $payment, $transactionId)
    {
        return $this->_pro->fetchTransactionInfo($payment, $transactionId);
    }

    protected function _placeOrder(Payment $payment, $amount)
    {
        $order = $payment->getOrder();
        $api = $this->_pro->getApi()->setPaymentAction(
            $this->_pro->getConfig()->getValue('paymentAction')
        )->setIpAddress(
            $this->_requestHttp->getClientIp(false)
        )->setAmount(
            $amount
        )->setCurrencyCode(
            $order->getBaseCurrencyCode()
        )->setInvNum(
            $order->getIncrementId()
        )->setEmail(
            $order->getCustomerEmail()
        )->setNotifyUrl(
            $this->_urlBuilder->getUrl('paypal/ipn/')
        )->setCreditCardType(
            $payment->getCcType()
        )->setCreditCardNumber(
            $payment->getCcNumber()
        )->setCreditCardExpirationDate(
            $this->_getFormattedCcExpirationDate($payment->getCcExpMonth(), $payment->getCcExpYear())
        )->setCreditCardCvv2(
            $payment->getCcCid()
        );

        // add shipping and billing addresses
        if ($order->getIsVirtual()) {
            $api->setAddress($order->getBillingAddress())->setSuppressShipping(true);
        } else {
            $api->setAddress($order->getShippingAddress());
            $api->setBillingAddress($order->getBillingAddress());
        }

        // add line items
        $cart = $this->_cartFactory->create(['salesModel' => $order]);

        $api->setPaypalCart($cart)->setIsLineItemsEnabled($this->_pro->getConfig()->getValue('lineItemsEnabled'));

        // call api and import transaction and other payment information
        $api->callDoDirectPayment();
        $this->_importResultToPayment($api, $payment);

        try {
            $api->callGetTransactionDetails();
        } catch (\Magento\Framework\Exception\LocalizedException $e) {
            // if we receive errors, but DoDirectPayment response is Success, then set Pending status for transaction
            $payment->setIsTransactionPending(true);
        }
        $this->_importResultToPayment($api, $payment);
        return $this;
    }

    protected function _getFormattedCcExpirationDate($month, $year)
    {
        return sprintf('%02d%02d', $month, $year);
    }

    protected function _importResultToPayment($api, $payment)
    {
        $payment->setTransactionId($api->getTransactionId())->setIsTransactionClosed(0);
        $this->_pro->importPaymentInfo($api, $payment);
    }

    public function canVoid()
    {
        return $this->_canVoid;
    }
}