class EntityCreateAnyAccessCheck

class EntityCreateAnyAccessCheck implements AccessInterface {
  
  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;
  
  /**
   * The entity type bundle info.
   *
   * @var \Drupal\Core\Entity\EntityTypeBundleInfoInterface
   */
  protected $entityTypeBundleInfo;
  
  /**
   * The key used by the routing requirement.
   *
   * @var string
   */
  protected $requirementsKey = '_entity_create_any_access';
  
  /**
   * Constructs an EntityCreateAnyAccessCheck object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
   *   The entity type bundle info.
   */
  public function __construct(EntityTypeManagerInterface $entity_type_manager, EntityTypeBundleInfoInterface $entity_type_bundle_info) {
    $this->entityTypeManager = $entity_type_manager;
    $this->entityTypeBundleInfo = $entity_type_bundle_info;
  }
  
  /**
   * Checks access to create an entity of any bundle for the given route.
   *
   * @param \Symfony\Component\Routing\Route $route
   *   The route to check against.
   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
   *   The parameterized route.
   * @param \Drupal\Core\Session\AccountInterface $account
   *   The currently logged in account.
   *
   * @return \Drupal\Core\Access\AccessResultInterface
   *   The access result.
   */
  public function access(Route $route, RouteMatchInterface $route_match, AccountInterface $account) {
    $entity_type_id = $route->getRequirement($this->requirementsKey);
    $entity_type = $this->entityTypeManager
      ->getDefinition($entity_type_id);
    $access_control_handler = $this->entityTypeManager
      ->getAccessControlHandler($entity_type_id);
    // In case there is no "bundle" entity key, check create access with no
    // bundle specified.
    if (!$entity_type->hasKey('bundle')) {
      return $access_control_handler->createAccess(NULL, $account, [], TRUE);
    }
    $access = AccessResult::neutral();
    $bundles = array_keys($this->entityTypeBundleInfo
      ->getBundleInfo($entity_type_id));
    // Include list cache tag as access might change if more bundles are added.
    if ($entity_type->getBundleEntityType()) {
      $access->addCacheTags($this->entityTypeManager
        ->getDefinition($entity_type->getBundleEntityType())
        ->getListCacheTags());
      if (empty($route->getOption('_ignore_create_bundle_access'))) {
        // Check if the user is allowed to create new bundles. If so, allow
        // access, so the add page can show a link to create one.
        // @see \Drupal\Core\Entity\Controller\EntityController::addPage()
        $bundle_access_control_handler = $this->entityTypeManager
          ->getAccessControlHandler($entity_type->getBundleEntityType());
        $access = $access->orIf($bundle_access_control_handler->createAccess(NULL, $account, [], TRUE));
        if ($access->isAllowed()) {
          return $access;
        }
      }
    }
    // Check whether an entity of any bundle may be created.
    foreach ($bundles as $bundle) {
      $bundle_access = $access_control_handler->createAccess($bundle, $account, [], TRUE);
      $access->inheritCacheability($bundle_access);
      if ($bundle_access instanceof AccessResultReasonInterface && $bundle_access->getReason() !== "" && $access->getReason() === "") {
        $access->setReason($bundle_access->getReason());
      }
      // In case there is at least one bundle the user can create entities for,
      // access is allowed.
      if ($bundle_access->isAllowed()) {
        return AccessResult::allowed()->inheritCacheability($access);
      }
    }
    return $access;
  }

}