AbstractEmail.php

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<?php
namespace Magento\ProductAlert\Block\Email;

use Magento\Framework\Pricing\PriceCurrencyInterface;
use Magento\Framework\App\ObjectManager;
use Magento\ProductAlert\Block\Product\ImageProvider;

abstract class AbstractEmail extends \Magento\Framework\View\Element\Template
{
    protected $_products = [];

    protected $_store;

    protected $_maliciousCode;

    protected $priceCurrency;

    protected $imageBuilder;

    private $imageProvider;

    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Framework\Filter\Input\MaliciousCode $maliciousCode,
        PriceCurrencyInterface $priceCurrency,
        \Magento\Catalog\Block\Product\ImageBuilder $imageBuilder,
        array $data = [],
        ImageProvider $imageProvider = null
    ) {
        $this->imageBuilder = $imageBuilder;
        $this->priceCurrency = $priceCurrency;
        $this->_maliciousCode = $maliciousCode;
        $this->imageProvider = $imageProvider ?: ObjectManager::getInstance()->get(ImageProvider::class);

        parent::__construct($context, $data);
    }

    public function getFilteredContent($content)
    {
        return $this->_maliciousCode->filter($content);
    }

    public function setStore($store)
    {
        if ($store instanceof \Magento\Store\Model\Website) {
            $store = $store->getDefaultStore();
        }
        if (!$store instanceof \Magento\Store\Model\Store) {
            $store = $this->_storeManager->getStore($store);
        }

        $this->_store = $store;

        return $this;
    }

    public function getStore()
    {
        if ($this->_store === null) {
            $this->_store = $this->_storeManager->getStore();
        }
        return $this->_store;
    }

    public function formatPrice($price, $format = true, $includeContainer = true)
    {
        return $format
            ? $this->priceCurrency->convertAndFormat($price, $includeContainer)
            : $this->priceCurrency->convert($price);
    }

    public function reset()
    {
        $this->_products = [];
    }

    public function addProduct(\Magento\Catalog\Model\Product $product)
    {
        $this->_products[$product->getId()] = $product;
    }

    public function getProducts()
    {
        return $this->_products;
    }

    protected function _getUrlParams()
    {
        return ['_scope' => $this->getStore(), '_scope_to_url' => true];
    }

    protected function getPriceRender()
    {
        return $this->_layout->createBlock(
            \Magento\Framework\Pricing\Render::class,
            '',
            ['data' => ['price_render_handle' => 'catalog_product_prices']]
        );
    }

    public function getProductPriceHtml(
        \Magento\Catalog\Model\Product $product,
        $priceType,
        $renderZone = \Magento\Framework\Pricing\Render::ZONE_ITEM_LIST,
        array $arguments = []
    ) {
        if (!isset($arguments['zone'])) {
            $arguments['zone'] = $renderZone;
        }

        $priceRender = $this->getPriceRender();
        $price = '';

        if ($priceRender) {
            $price = $priceRender->render(
                $priceType,
                $product,
                $arguments
            );
        }
        return $price;
    }

    public function getImage($product, $imageId, $attributes = [])
    {
        return $this->imageProvider->getImage($product, $imageId, $attributes);
    }
}