lookyman/u2f

<?php

namespace lookyman\U2f\Server;

use lookyman\U2f\Exception\IException;
use lookyman\U2f\Exception\RegistrationException;

class RegistrationCollection implements \Countable, \IteratorAggregate
{

    /** @var Registration[] */
    private $registrations = [];

    /**
     * @return self
     */
    public function add(Registration $registration)
    {
        $this->registrations[] = $registration;
        return $this;
    }

    /**
     * @return Registration
     */
    public function getMatchingRegistration(SignResponse $response)
    {
        foreach ($this->registrations as $registration) {
            if ($registration->getKeyHandle() === $response->getKeyHandle()) {
                return $registration;
            }
        }
        throw new RegistrationException('No matching Registration found.', IException::ERR_NO_MATCHING_REGISTRATION);
    }

    /**
     * @internal
     * @return \Traversable
     */
    public function getIterator()
    {
        return new \ArrayIterator($this->registrations);
    }

    /**
     * @internal
     * @return int
     */
    public function count()
    {
        return count($this->registrations);
    }

}