Pviewed.php

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<?php
namespace Magento\Sales\Block\Adminhtml\Order\Create\Sidebar;

use Magento\Framework\Pricing\PriceCurrencyInterface;

class Pviewed extends \Magento\Sales\Block\Adminhtml\Order\Create\Sidebar\AbstractSidebar
{
    protected $_productFactory;

    protected $_eventFactory;

    public function __construct(
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Backend\Model\Session\Quote $sessionQuote,
        \Magento\Sales\Model\AdminOrder\Create $orderCreate,
        PriceCurrencyInterface $priceCurrency,
        \Magento\Sales\Model\Config $salesConfig,
        \Magento\Reports\Model\EventFactory $eventFactory,
        \Magento\Catalog\Model\ProductFactory $productFactory,
        array $data = []
    ) {
        $this->_eventFactory = $eventFactory;
        $this->_productFactory = $productFactory;
        parent::__construct($context, $sessionQuote, $orderCreate, $priceCurrency, $salesConfig, $data);
    }

    protected function _construct()
    {
        parent::_construct();
        $this->setId('sales_order_create_sidebar_pviewed');
        $this->setDataId('pviewed');
    }

    public function getHeaderText()
    {
        return __('Recently Viewed Products');
    }

    public function getItemCollection()
    {
        $productCollection = $this->getData('item_collection');
        if ($productCollection === null) {
            $stores = [];
            $website = $this->_storeManager->getStore($this->getStoreId())->getWebsite();
            foreach ($website->getStores() as $store) {
                $stores[] = $store->getId();
            }

            $collection = $this->_eventFactory->create()->getCollection()->addStoreFilter(
                $stores
            )->addRecentlyFiler(
                \Magento\Reports\Model\Event::EVENT_PRODUCT_VIEW,
                $this->getCustomerId(),
                0
            );
            $productIds = [];
            foreach ($collection as $event) {
                $productIds[] = $event->getObjectId();
            }

            $productCollection = null;
            if ($productIds) {
                $productCollection = $this->_productFactory->create()->getCollection()->setStoreId(
                    $this->getQuote()->getStoreId()
                )->addStoreFilter(
                    $this->getQuote()->getStoreId()
                )->addAttributeToSelect(
                    'name'
                )->addAttributeToSelect(
                    'price'
                )->addAttributeToSelect(
                    'small_image'
                )->addIdFilter(
                    $productIds
                )->load();
            }
            $this->setData('item_collection', $productCollection);
        }
        return $productCollection;
    }

    public function canRemoveItems()
    {
        return false;
    }

    public function getIdentifierId($item)
    {
        return $item->getId();
    }
}