ListProducts.php

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<?php
namespace Magento\Downloadable\Block\Customer\Products;

use Magento\Downloadable\Model\Link\Purchased\Item;

class ListProducts extends \Magento\Framework\View\Element\Template
{
    protected $currentCustomer;

    protected $_linksFactory;

    protected $_itemsFactory;

    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Customer\Helper\Session\CurrentCustomer $currentCustomer,
        \Magento\Downloadable\Model\ResourceModel\Link\Purchased\CollectionFactory $linksFactory,
        \Magento\Downloadable\Model\ResourceModel\Link\Purchased\Item\CollectionFactory $itemsFactory,
        array $data = []
    ) {
        $this->currentCustomer = $currentCustomer;
        $this->_linksFactory = $linksFactory;
        $this->_itemsFactory = $itemsFactory;
        parent::__construct($context, $data);
    }

    protected function _construct()
    {
        parent::_construct();
        $purchased = $this->_linksFactory->create()
            ->addFieldToFilter('customer_id', $this->currentCustomer->getCustomerId())
            ->addOrder('created_at', 'desc');
        $this->setPurchased($purchased);
        $purchasedIds = [];
        foreach ($purchased as $_item) {
            $purchasedIds[] = $_item->getId();
        }
        if (empty($purchasedIds)) {
            $purchasedIds = [null];
        }
        $purchasedItems = $this->_itemsFactory->create()->addFieldToFilter(
            'purchased_id',
            ['in' => $purchasedIds]
        )->addFieldToFilter(
            'status',
            ['nin' => [Item::LINK_STATUS_PENDING_PAYMENT, Item::LINK_STATUS_PAYMENT_REVIEW]]
        )->setOrder(
            'item_id',
            'desc'
        );
        $this->setItems($purchasedItems);
    }

    protected function _prepareLayout()
    {
        parent::_prepareLayout();

        $pager = $this->getLayout()->createBlock(
            \Magento\Theme\Block\Html\Pager::class,
            'downloadable.customer.products.pager'
        )->setCollection(
            $this->getItems()
        )->setPath('downloadable/customer/products');
        $this->setChild('pager', $pager);
        $this->getItems()->load();
        foreach ($this->getItems() as $item) {
            $item->setPurchased($this->getPurchased()->getItemById($item->getPurchasedId()));
        }
        return $this;
    }

    public function getOrderViewUrl($orderId)
    {
        return $this->getUrl('sales/order/view', ['order_id' => $orderId]);
    }

    public function getBackUrl()
    {
        if ($this->getRefererUrl()) {
            return $this->getRefererUrl();
        }
        return $this->getUrl('customer/account/');
    }

    public function getRemainingDownloads($item)
    {
        if ($item->getNumberOfDownloadsBought()) {
            $downloads = $item->getNumberOfDownloadsBought() - $item->getNumberOfDownloadsUsed();
            return $downloads;
        }
        return __('Unlimited');
    }

    public function getDownloadUrl($item)
    {
        return $this->getUrl('downloadable/download/link', ['id' => $item->getLinkHash(), '_secure' => true]);
    }

    public function getIsOpenInNewWindow()
    {
        return $this->_scopeConfig->isSetFlag(
            \Magento\Downloadable\Model\Link::XML_PATH_TARGET_NEW_WINDOW,
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
        );
    }
}