class NodeAddAccessCheck

class NodeAddAccessCheck implements AccessInterface {
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs an EntityCreateAccessCheck object.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     */
    public function __construct(EntityTypeManagerInterface $entity_type_manager) {
        $this->entityTypeManager = $entity_type_manager;
    }
    
    /**
     * Checks access to the node add page for the node type.
     *
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The currently logged in account.
     * @param \Drupal\node\NodeTypeInterface $node_type
     *   (optional) The node type. If not specified, access is allowed if there
     *   exists at least one node type for which the user may create a node.
     *
     * @return \Drupal\Core\Access\AccessResultInterface
     *   The access result.
     */
    public function access(AccountInterface $account, NodeTypeInterface $node_type = NULL) {
        $access_control_handler = $this->entityTypeManager
            ->getAccessControlHandler('node');
        // If checking whether a node of a particular type may be created.
        if ($account->hasPermission('administer content types')) {
            return AccessResult::allowed()->cachePerPermissions();
        }
        if ($node_type) {
            return $access_control_handler->createAccess($node_type->id(), $account, [], TRUE);
        }
        // If checking whether a node of any type may be created.
        foreach ($this->entityTypeManager
            ->getStorage('node_type')
            ->loadMultiple() as $node_type) {
            if (($access = $access_control_handler->createAccess($node_type->id(), $account, [], TRUE)) && $access->isAllowed()) {
                return $access;
            }
        }
        // No opinion.
        return AccessResult::neutral();
    }

}