Sidebar.php

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<?php
namespace Magento\Checkout\Block\Cart;

use Magento\Store\Model\ScopeInterface;

class Sidebar extends AbstractCart
{
    const XML_PATH_CHECKOUT_SIDEBAR_DISPLAY = 'checkout/sidebar/display';

    const XML_PATH_CHECKOUT_SIDEBAR_COUNT = 'checkout/sidebar/count';

    protected $imageHelper;

    private $serializer;

    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Customer\Model\Session $customerSession,
        \Magento\Checkout\Model\Session $checkoutSession,
        \Magento\Catalog\Helper\Image $imageHelper,
        \Magento\Customer\CustomerData\JsLayoutDataProviderPoolInterface $jsLayoutDataProvider,
        array $data = [],
        \Magento\Framework\Serialize\Serializer\Json $serializer = null
    ) {
        if (isset($data['jsLayout'])) {
            $this->jsLayout = array_merge_recursive($jsLayoutDataProvider->getData(), $data['jsLayout']);
            unset($data['jsLayout']);
        } else {
            $this->jsLayout = $jsLayoutDataProvider->getData();
        }
        parent::__construct($context, $customerSession, $checkoutSession, $data);
        $this->_isScopePrivate = false;
        $this->imageHelper = $imageHelper;
        $this->serializer = $serializer ?: \Magento\Framework\App\ObjectManager::getInstance()
            ->get(\Magento\Framework\Serialize\Serializer\Json::class);
    }

    public function getConfig()
    {
        return [
            'shoppingCartUrl' => $this->getShoppingCartUrl(),
            'checkoutUrl' => $this->getCheckoutUrl(),
            'updateItemQtyUrl' => $this->getUpdateItemQtyUrl(),
            'removeItemUrl' => $this->getRemoveItemUrl(),
            'imageTemplate' => $this->getImageHtmlTemplate(),
            'baseUrl' => $this->getBaseUrl(),
            'minicartMaxItemsVisible' => $this->getMiniCartMaxItemsCount(),
            'websiteId' => $this->_storeManager->getStore()->getWebsiteId(),
            'maxItemsToDisplay' => $this->getMaxItemsToDisplay()
        ];
    }

    public function getSerializedConfig()
    {
        return $this->serializer->serialize($this->getConfig());
    }

    public function getImageHtmlTemplate()
    {
        return 'Magento_Catalog/product/image_with_borders';
    }

    public function getCheckoutUrl()
    {
        return $this->getUrl('checkout');
    }

    public function getShoppingCartUrl()
    {
        return $this->getUrl('checkout/cart');
    }

    public function getUpdateItemQtyUrl()
    {
        return $this->getUrl('checkout/sidebar/updateItemQty', ['_secure' => $this->getRequest()->isSecure()]);
    }

    public function getRemoveItemUrl()
    {
        return $this->getUrl('checkout/sidebar/removeItem', ['_secure' => $this->getRequest()->isSecure()]);
    }

    public function getIsNeedToDisplaySideBar()
    {
        return (bool)$this->_scopeConfig->getValue(
            self::XML_PATH_CHECKOUT_SIDEBAR_DISPLAY,
            ScopeInterface::SCOPE_STORE
        );
    }

    public function getTotalsCache()
    {
        if (empty($this->_totals)) {
            $quote = $this->getCustomQuote() ? $this->getCustomQuote() : $this->getQuote();
            $this->_totals = $quote->getTotals();
        }
        return $this->_totals;
    }

    public function getTotalsHtml()
    {
        return $this->getLayout()->getBlock('checkout.cart.minicart.totals')->toHtml();
    }

    public function getBaseUrl()
    {
        return $this->_storeManager->getStore()->getBaseUrl();
    }

    private function getMiniCartMaxItemsCount()
    {
        return (int)$this->_scopeConfig->getValue('checkout/sidebar/count', ScopeInterface::SCOPE_STORE);
    }

    private function getMaxItemsToDisplay()
    {
        return (int)$this->_scopeConfig->getValue(
            'checkout/sidebar/max_items_display_count',
            ScopeInterface::SCOPE_STORE
        );
    }
}