lookyman/u2f

<?php

namespace lookyman\U2f\Server;

use lookyman\U2f\Exception\IException;
use lookyman\U2f\Exception\SignRequestException;

class SignRequestCollection implements \Countable, \IteratorAggregate, \JsonSerializable
{

    /** @var SignRequest[] */
    private $requests = [];

    /**
     * @return self
     */
    public function add(SignRequest $request)
    {
        $this->requests[] = $request;
        return $this;
    }

    /**
     * @return SignRequest
     */
    public function getMatchingRequest(SignResponse $response)
    {
        foreach ($this->requests as $request) {
            if ($request->getKeyHandle() === $response->getKeyHandle() && $request->getChallenge() === $response->getChallenge()) {
                return $request;
            }
        }
        throw new SignRequestException('No matching request found.', IException::ERR_NO_MATCHING_REQUEST);
    }

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

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

    /**
     * @internal
     * @return SignRequest[]
     */
    public function jsonSerialize()
    {
        return $this->requests;
    }

}