ESW price plugin

RetailerAdjustmentPlugin.php

<?php
/**
 * Imagination Media
 *
 * @category  ImaginationMedia
 * @package   ImaginationMedia_EshopWorld
 * @author    Calin Diacon <calin@imaginationmedia.com>
 * @copyright Copyright (c) 2020 Imagination Media (https://www.imaginationmedia.com/)
 * @license   https://opensource.org/licenses/OSL-3.0.php Open Software License 3.0
 */

namespace ImaginationMedia\EshopWorld\Plugin;

use EShopWorld\Checkout\Pricing\Adjustment\RetailerAdjustment;
use Magento\Framework\Pricing\SaleableInterface;
use Magento\Store\Model\StoreManagerInterface;

class RetailerAdjustmentPlugin
{
    /**
     * @var StoreManagerInterface
     */
    private $storeManager;

    /**
     * RetailerAdjustmentPlugin constructor.
     * @param StoreManagerInterface $storeManager
     */
    public function __construct(StoreManagerInterface $storeManager)
    {
        $this->storeManager = $storeManager;
    }

    /**
     * @param RetailerAdjustment $subject
     * @param callable $proceed
     * @param $amount
     * @param SaleableInterface $saleableItem
     * @param array $context
     * @return mixed
     * @throws \Magento\Framework\Exception\LocalizedException
     * @throws \Magento\Framework\Exception\NoSuchEntityException
     */
    public function aroundApplyAdjustment(
        RetailerAdjustment $subject,
        callable $proceed,
        $amount,
        SaleableInterface $saleableItem,
        $context = []
    ) {
        $fromCurrency = $this->storeManager->getStore($saleableItem->getStoreId())->getBaseCurrency()->getCode();
        $toCurrency = $this->storeManager->getStore()->getCurrentCurrency()->getCode();
        if ($fromCurrency == 'USD' && $toCurrency == 'USD') {
            return $amount;
        } else {
            return $proceed($amount, $saleableItem, $context);
        }
    }
}