<?php

class Whatever
{
    public function invalidate()
    {
        if (\count($this->objects_to_invalidate) < 1)
        {
            return [];
        }

        try
        {
            $endpoint = '/zones/pull.json/417146/cache';

            $this->maxcdn_client->delete($endpoint, ['files' => $this->objects_to_invalidate]);

            return $this->objects_to_invalidate;
        }
        catch (RWSException $exception)
        {
            $error_message = '[MaxCDN] ' . $exception->getMessage();

            throw new CdnException($error_message, $exception->getCode());
        }
    }
}