Issue #2905337 by bojanz: Add a commerce_entity_render twig filter

commerce.services.yml

@@ -50,6 +50,11 @@ services:
     class: Drupal\commerce\Config\ConfigUpdater
     arguments: ['@entity_type.manager', '@config.storage', '@config.factory']
 
+  commerce.twig_extension:
+    class: Drupal\commerce\TwigExtension\CommerceTwigExtension
+    tags:
+      - { name: twig.extension }
+
   cache_context.country:
     class: Drupal\commerce\Cache\Context\CountryCacheContext
     arguments: ['@commerce.current_country']

modules/price/src/TwigExtension/PriceTwigExtension.php

@@ -22,7 +22,7 @@ class PriceTwigExtension extends \Twig_Extension {
    * @inheritdoc
    */
   public function getName() {
-    return 'commerce_price.twig_extenstion';
+    return 'commerce_price.twig_extension';
   }
 
   /**

src/TwigExtension/CommerceTwigExtension.php

+<?php
+
+namespace Drupal\commerce\TwigExtension;
+
+use Drupal\Core\Entity\ContentEntityInterface;
+
+/**
+ * Provides the Commerce Twig extensions.
+ */
+class CommerceTwigExtension extends \Twig_Extension {
+
+  /**
+   * @inheritdoc
+   */
+  public function getFilters() {
+    return [
+      new \Twig_SimpleFilter('commerce_entity_render', [$this, 'renderEntity']),
+    ];
+  }
+
+  /**
+   * @inheritdoc
+   */
+  public function getName() {
+    return 'commerce.twig_extension';
+  }
+
+  /**
+   * Renders an entity in the given view mode.
+   *
+   * Example: {{ order_item.getPurchasableEntity|commerce_entity_render }}
+   *
+   * @param mixed $entity
+   *   The entity.
+   * @param string $view_mode
+   *   The view mode.
+   *
+   * @return array
+   *   A renderable array for the rendered entity.
+   *
+   * @throws \InvalidArgumentException
+   */
+  public static function renderEntity($entity, $view_mode = 'default') {
+    if (empty($entity)) {
+      // Nothing to render.
+      return [];
+    }
+    if (!($entity instanceof ContentEntityInterface)) {
+      throw new \InvalidArgumentException('The "commerce_entity_render" filter must be given a content entity.');
+    }
+
+    $view_builder = \Drupal::entityTypeManager()->getViewBuilder($entity->getEntityTypeId());
+    return $view_builder->view($entity, $view_mode);
+  }
+
+}

tests/modules/commerce_test/commerce_test.module

+<?php
+
+/**
+ * @file
+ * Test module for Commerce.
+ */
+
+/**
+ * Implements hook_theme().
+ */
+function commerce_test_theme($existing, $type, $theme, $path) {
+  return [
+    'render_entity' => [
+      'template' => 'commerce-test-entity-render',
+      'variables' => [
+        'entity' => NULL,
+      ],
+    ],
+  ];
+}

tests/modules/commerce_test/templates/commerce-test-entity-render.html.twig

+{{ entity|commerce_entity_render }}

tests/src/Kernel/CommerceTwigExtensionTest.php

+<?php
+
+namespace Drupal\Tests\commerce\Kernel;
+
+use Drupal\commerce_price\Entity\Currency;
+
+/**
+ * Tests the commerce twig filters.
+ *
+ * @group commerce
+ */
+class CommerceTwigExtensionTest extends CommerceKernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = [
+    'commerce_test',
+  ];
+
+  /**
+   * Tests trying to render a config entity.
+   */
+  public function testRenderConfigEntity() {
+    $theme = [
+      '#theme' => 'render_entity',
+      '#entity' => Currency::load('USD'),
+    ];
+    $this->setExpectedException('InvalidArgumentException');
+    $this->render($theme);
+  }
+
+  /**
+   * Tests rendering a content entity.
+   */
+  public function testRenderContentEntity() {
+    $account = $this->createUser();
+
+    $theme = [
+      '#theme' => 'render_entity',
+      '#entity' => $account,
+    ];
+    $this->render($theme);
+    $this->assertText('Member for');
+  }
+
+}