<?php

namespace Drupal\custom_forms\Controller;

use Drupal\Core\Entity\Controller\EntityViewController;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityRepositoryInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Render\RendererInterface;
use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Class CustomFormViewController
 *
 * @package Drupal\custom_forms\Controller
 */
class CustomFormViewController extends EntityViewController {

  /**
   * The current user.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $currentUser;

  /**
   * The entity repository service.
   *
   * @var \Drupal\Core\Entity\EntityRepositoryInterface
   */
  protected $entityRepository;

  /**
   * Creates an CustomFormViewController object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer service.
   * @param \Drupal\Core\Session\AccountInterface $current_user
   *   The current user. For backwards compatibility this is optional, however
   *   this will be removed before Drupal 9.0.0.
   * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
   *   The entity repository.
   */
  public function __construct(EntityTypeManagerInterface $entity_type_manager, RendererInterface $renderer, AccountInterface $current_user = NULL, EntityRepositoryInterface $entity_repository = NULL) {
    parent::__construct($entity_type_manager, $renderer);
    $this->currentUser = $current_user ?: \Drupal::currentUser();
    if (!$entity_repository) {
      @trigger_error('The entity.repository service must be passed to CustomFormViewController::__construct(), it is required before Drupal 9.0.0. See https://www.drupal.org/node/2549139.', E_USER_DEPRECATED);
      $entity_repository = \Drupal::service('entity.repository');
    }
    $this->entityRepository = $entity_repository;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static(
      $container->get('entity_type.manager'),
      $container->get('renderer'),
      $container->get('current_user'),
      $container->get('entity.repository')
    );
  }

  /**
   * {@inheritdoc}
   */
  public function view(EntityInterface $custom_form, $view_mode = 'full', $langcode = NULL) {
    return parent::view($custom_form, $view_mode, $langcode);
  }

  /**
   * The _title_callback for the page that renders a single custom form.
   *
   * @param \Drupal\Core\Entity\EntityInterface $custom_form
   *   The current custom form.
   *
   * @return string
   *   The page title.
   */
  public function title(EntityInterface $custom_form) {
    return $this->entityRepository->getTranslationFromContext($custom_form)->label();
  }
}