entity_generic-8.x-3.x-dev/src/GenericViewBuilder.php

<?php

namespace Drupal\entity_generic;

use Drupal\Core\Entity\EntityViewBuilder;
use Drupal\Core\Entity\EntityInterface;

/**
 * Render controller for entities.
 */
class GenericViewBuilder extends EntityViewBuilder {

  /**
   * {@inheritdoc}
   */
  public function buildComponents(array &$build, array $entities, array $displays, $view_mode) {
    if (empty($entities)) {
      return;
    }

    parent::buildComponents($build, $entities, $displays, $view_mode);

    foreach ($entities as $id => $entity) {
      $bundle = $entity->bundle();
      $display = $displays[$bundle];

      // Add Language field text element to entity render array.
      if ($display->getComponent('langcode')) {
        $build[$id]['langcode'] = array(
          '#type' => 'item',
          '#title' => t('Language'),
          '#markup' => $entity->language()->getName(),
          '#prefix' => '<div id="field-language-display">',
          '#suffix' => '</div>',
        );
      }
    }
  }

  /**
   * Provides entity-specific defaults to the build process.
   *
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity for which the defaults should be provided.
   * @param string $view_mode
   *   The view mode that should be used.
   *
   * @return array
   *   Build array.
   */
  protected function getBuildDefaults(EntityInterface $entity, $view_mode) {
    $build = parent::getBuildDefaults($entity, $view_mode);
    $build['#theme'] = 'entity_generic';
    return $build;
  }

}