Use blocks instead of directly modifying the template

Model/Plugin/AfterPrice.php

@@ -1,114 +0,0 @@
-<?php
-/**
- * NOTICE OF LICENSE
- *
- * This source file is subject to the Open Software License (OSL 3.0)
- * that is available through the world-wide-web at this URL:
- * http://opensource.org/licenses/osl-3.0.php
- */
-
-/**
- * @category   Magenerds
- * @package    Magenerds_GermanLaw
- * @subpackage Model
- * @copyright  Copyright (c) 2019 TechDivision GmbH (https://www.techdivision.com)
- * @link       https://www.techdivision.com/
- * @author     Florian Sydekum <[email protected]>
- */
-namespace Magenerds\GermanLaw\Model\Plugin;
-
-use Magento\Framework\Pricing\Render;
-use Magento\Framework\Pricing\SaleableInterface;
-
-/**
- * Class AfterPrice
- * @package Magenerds\GermanLaw\Model\Plugin
- */
-class AfterPrice
-{
-    /**
-     * Hold final price code
-     *
-     * @var string
-     */
-    const FINAL_PRICE = 'final_price';
-
-    /**
-     * Hold tier price code
-     *
-     * @var string
-     */
-    const TIER_PRICE = 'tier_price';
-
-    /**
-     * Hold layout
-     *
-     * @var \Magento\Framework\View\LayoutInterface
-     */
-    protected $_layout;
-
-    /**
-     * Hold after price html string
-     *
-     * @var null|string
-     */
-    protected $_afterPriceHtml = null;
-
-    /**
-     * Constructor
-     *
-     * @param \Magento\Framework\View\LayoutInterface $layout
-     */
-    public function __construct(
-        \Magento\Framework\View\LayoutInterface $layout
-    ){
-        $this->_layout = $layout;
-    }
-
-    /**
-     * Plugin for price rendering in order to display after price information
-     *
-     * @param \Magento\Framework\Pricing\Render $subject
-     * @oaram \Closure $closure
-     * @param array $params
-     * @return string
-     */
-    public function aroundRender(Render $subject, \Closure $closure, ...$params)
-    {
-        // run default render first
-        $renderHtml = $closure(...$params);
-
-        try{
-            // Get Price Code and Product
-            list($priceCode, $productInterceptor) = $params;
-            $emptyTierPrices = empty($productInterceptor->getTierPrice());
-
-            // If it is final price block and no tier prices exist set additional render
-            // If it is tier price block and tier prices exist set additional render
-            if ((static::FINAL_PRICE === $priceCode && $emptyTierPrices) || (static::TIER_PRICE === $priceCode && !$emptyTierPrices)) {
-                $renderHtml .= $this->_getAfterPriceHtml();
-            }
-        } catch (\Exception $ex) {
-            // if an error occurs, just render the default since it is preallocated
-            return $renderHtml;
-        }
-
-        return $renderHtml;
-    }
-
-    /**
-     * Renders and caches the after price html
-     *
-     * @return null|string
-     */
-    protected function _getAfterPriceHtml()
-    {
-        if (null === $this->_afterPriceHtml) {
-            $afterPriceBlock = $this->_layout->createBlock('Magenerds\GermanLaw\Block\AfterPrice', 'after_price');
-            $afterPriceBlock->setTemplate('Magenerds_GermanLaw::price/after.phtml');
-            $this->_afterPriceHtml = $afterPriceBlock->toHtml();
-        }
-
-        return $this->_afterPriceHtml;
-    }
-}

view/frontend/layout/catalog_product_view.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Open Software License (OSL 3.0)
+ * that is available through the world-wide-web at this URL:
+ * http://opensource.org/licenses/osl-3.0.php
+ */
+
+/**
+ * @category   Magenerds
+ * @package    Magenerds_GermanLaw
+ * @subpackage view
+ * @author     Konrad Langenberg <[email protected]>
+ * @copyright  Copyright (c) 2019 TechDivision GmbH (http://www.techdivision.com)
+ * @link       http://www.techdivision.com/
+ */
+ -->
+<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../../../lib/internal/Magento/Framework/View/Layout/etc/page_configuration.xsd">
+    <body>
+        <referenceContainer name="product.info.price">
+            <block after="product.price.final" class="Magenerds\GermanLaw\Block\AfterPrice" name="price.final.after" as="price.final.after"
+                   template="Magenerds_GermanLaw::price/after.phtml"/>
+        </referenceContainer>
+    </body>
+</page>