lookyman/recaptcha

<?php

/**
 * This file is part of lookyman/ReCaptcha (https://github.com/lookyman/recaptcha)
 *
 * Copyright (c) 2015 Lukáš Unger (looky.msc@gmail.com)
 *
 * For the full copyright and license information, please view the file LICENSE that was distributed with this source code.
 */

namespace lookyman\ReCaptcha;

use lookyman\ReCaptcha\Client\IClient;
use lookyman\ReCaptcha\Exception\BadResponseException;
use lookyman\ReCaptcha\Exception\ClientException;
use lookyman\ReCaptcha\Forms\Controls\ReCaptchaControl;
use Nette\Http\IRequest;
use Nette\SmartObject;
use Nette\Utils\Json;

/**
 * Validates ReCaptchaControl.
 *
 * @author Lukáš Unger <looky.msc@gmail.com>
 */
class Validator
{

    use SmartObject;

    /** @var \lookyman\ReCaptcha\Config */
    private $config;

    /** @var \lookyman\ReCaptcha\Client\IClient */
    private $client;

    /** @var \Nette\Http\IRequest */
    private $request;

    public function __construct(Config $config, IClient $client, IRequest $request)
    {
        $this->config = $config;
        $this->client = $client;
        $this->request = $request;
    }

    /**
     * @return bool
     * @throws \lookyman\ReCaptcha\Exception\ClientException
     * @throws \lookyman\ReCaptcha\Exception\BadResponseException
     */
    public function validateControl(ReCaptchaControl $control)
    {
        if (!$control->isFilled()) {
            return FALSE;
        }

        try {
            $response = $this->client->validate(
                $this->config->getVerificationUrl(),
                $this->config->getSecretKey(),
                $control->getValue(),
                $this->config->getValidateRemoteIp()
                    ? $this->request->getRemoteAddress()
                    : NULL
            );

        } catch (\Exception $e) {
            throw new ClientException('There was an error while contacting the verification API.', NULL, $e);
        }

        $code = $response->getStatusCode();
        if ($code !== 200) {
            throw new BadResponseException('The verification API did not respond correctly.', $code);
        }
        $answer = Json::decode($response->getBody()->getContents());
        return isset($answer->success) && $answer->success === TRUE;
    }

}