Arcanedev\NoCaptcha\NoCaptcha

Complexity

Total Complexity

27

Size/Duplication

Total Lines	386
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	6

Test Coverage

Coverage

93.75%

Importance

Changes

0

20 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	8	1
A	setSecret()	0	8	1
A	getSiteKey()	0	4	1
A	setSiteKey()	0	8	1
A	setLang()	0	6	1
A	setRequestClient()	0	6	1
A	getLastResponse()	0	4	1
A	input()	0	6	1
A	verify()	0	8	1
A	verifyRequest()	0	10	1
A	script()	0	11	2
A	getApiScript()	0	13	1
A	hasLang()	0	4	1
A	hasCallbackName()	0	4	2
A	checkKey()	0	8	1
A	checkIsString()	0	8	2
A	checkIsNotEmpty()	0	6	2
A	sendVerifyRequest()	0	8	1
A	getScriptSrc()	0	15	4
A	toHtmlString()	0	4	1

<?php namespace Arcanedev\NoCaptcha;

use Arcanedev\NoCaptcha\Utilities\Request;
use Illuminate\Support\Arr;
use Illuminate\Support\HtmlString;
use Psr\Http\Message\ServerRequestInterface;

/**
 * Class     NoCaptcha
 *
 * @package  Arcanedev\NoCaptcha
 * @author   ARCANEDEV <arcanedev.maroc@gmail.com>
 */
class NoCaptcha implements Contracts\NoCaptcha
{
    /* -----------------------------------------------------------------
     |  Constants
     | -----------------------------------------------------------------
     */

    const CLIENT_URL   = 'https://www.google.com/recaptcha/api.js';
    const VERIFY_URL   = 'https://www.google.com/recaptcha/api/siteverify';
    const CAPTCHA_NAME = 'g-recaptcha-response';

    /* -----------------------------------------------------------------
     |  Properties
     | -----------------------------------------------------------------
     */

    /**
     * The shared key between your site and ReCAPTCHA
     *
     * @var string
     */
    private $secret;

    /**
     * Your site key
     *
     * @var string
     */
    private $siteKey;

    /**
     * Forces the widget to render in a specific language.
     * Auto-detects the user's language if unspecified.
     *
     * @var string
     */
    protected $lang;

    /**
     * Decides if we've already loaded the script file or not.
     *
     * @param bool
     */
    protected $scriptLoaded = false;

    /**
     * HTTP Request Client
     *
     * @var \Arcanedev\NoCaptcha\Contracts\Utilities\Request
     */
    protected $request;

    /**
     * ReCaptcha's response.
     *
     * @var \Arcanedev\NoCaptcha\Utilities\Response|null
     */
    protected $response;

    /* -----------------------------------------------------------------
     |  Constructor
     | -----------------------------------------------------------------
     */

    /**
     * NoCaptcha constructor.
     *
     * @param  string       $secret
     * @param  string       $siteKey
     * @param  string|null  $lang
     */
    public function __construct($secret, $siteKey, $lang = null)
    {
        $this->setSecret($secret);
        $this->setSiteKey($siteKey);
        $this->setLang($lang);

        $this->setRequestClient(new Request);
    }

    /* -----------------------------------------------------------------
     |  Getters & Setters
     | -----------------------------------------------------------------
     */

    /**
     * Set the secret key.
     *
     * @param  string  $secret
     *
     * @return self
     */
    protected function setSecret($secret)
    {
        self::checkKey('secret key', $secret);

        $this->secret = $secret;

        return $this;
    }

    /**
     * Get the site key.
     *
     * @return string
     */
    public function getSiteKey()
    {
        return $this->siteKey;
    }

    /**
     * Set Site key.
     *
     * @param  string  $siteKey
     *
     * @return self
     */
    protected function setSiteKey($siteKey)
    {
        self::checkKey('site key', $siteKey);

        $this->siteKey = $siteKey;

        return $this;
    }

    /**
     * Set language code.
     *
     * @param  string  $lang
     *
     * @return self
     */
    public function setLang($lang)
    {
        $this->lang = $lang;

        return $this;
    }

    /**
     * Set HTTP Request Client.
     *
     * @param  \Arcanedev\NoCaptcha\Contracts\Utilities\Request  $request
     *
     * @return self
     */
    public function setRequestClient(Contracts\Utilities\Request $request)
    {
        $this->request = $request;

        return $this;
    }

    /**
     * Get the last response.
     *
     * @return \Arcanedev\NoCaptcha\Utilities\Response|null
     */
    public function getLastResponse()
    {
        return $this->response;
    }

    /* -----------------------------------------------------------------
     |  Main Methods
     | -----------------------------------------------------------------
     */

    /**
     * @param  string  $name
     *
     * @return \Illuminate\Support\HtmlString
     */
    public function input($name = 'g-recaptcha-response')
    {
        return $this->toHtmlString(
            '<input type="hidden" id="'.$name.'" name="'.$name.'">'
        );
    }

    /**
     * Verify Response.
     *
     * @param  string  $response
     * @param  string  $clientIp
     *
     * @return \Arcanedev\NoCaptcha\Utilities\Response
     */
    public function verify($response, $clientIp = null)
    {
        return $this->response = $this->sendVerifyRequest([
            'secret'   => $this->secret,
            'response' => $response,
            'remoteip' => $clientIp
        ]);
    }

    /**
     * Calls the reCAPTCHA siteverify API to verify whether the user passes CAPTCHA
     * test using a PSR-7 ServerRequest object.
     *
     * @param  \Psr\Http\Message\ServerRequestInterface  $request
     *
     * @return \Arcanedev\NoCaptcha\Utilities\Response
     */
    public function verifyRequest(ServerRequestInterface $request)
    {
        $body   = $request->getParsedBody();
        $server = $request->getServerParams();

        return $this->verify(
            $body[self::CAPTCHA_NAME] ?? '',
            $server['REMOTE_ADDR'] ?? null
        );
    }

    /**
     * Get script tag.
     *
     * @param  string|null  $callbackName
     *
     * @return \Illuminate\Support\HtmlString
     */
    public function script($callbackName = null)
    {
        $script = '';

        if ( ! $this->scriptLoaded) {
            $script = '<script src="'.$this->getScriptSrc($callbackName).'"></script>';
            $this->scriptLoaded = true;
        }

        return $this->toHtmlString($script);
    }

    /**
     * Get the NoCaptcha API Script.
     *
     * @return \Illuminate\Support\HtmlString
     */
    public function getApiScript()
    {
        return $this->toHtmlString(
            "<script>
                window.noCaptcha = {
                    render: function(action, callback) {
                        grecaptcha.execute('".$this->getSiteKey()."', {action})
                              .then(callback);
                    }
                }
            </script>"
        );
    }

    /* -----------------------------------------------------------------
     |  Check Methods
     | -----------------------------------------------------------------
     */

    /**
     * Check if has lang.
     *
     * @return bool
     */
    private function hasLang()
    {
        return ! empty($this->lang);
    }

    /**
     * Check if callback is not empty.
     *
     * @param  string|null  $callbackName
     *
     * @return bool
     */
    private function hasCallbackName($callbackName)
    {
        return ! (is_null($callbackName) || trim($callbackName) === '');
    }

    /**
     * Check key.
     *
     * @param  string  $name
     * @param  string  $value
     */
    private static function checkKey($name, &$value)
    {
        self::checkIsString($name, $value);

        $value = trim($value);

        self::checkIsNotEmpty($name, $value);
    }

    /**
     * Check if the value is a string value.
     *
     * @param  string  $name
     * @param  string  $value
     *
     * @throws \Arcanedev\NoCaptcha\Exceptions\ApiException
     */
    private static function checkIsString($name, $value)
    {
        if ( ! is_string($value)) {
            throw new Exceptions\ApiException(
                "The {$name} must be a string value, ".gettype($value).' given.'
            );
        }
    }

    /**
     * Check if the value is not empty.
     *
     * @param string  $name
     * @param string  $value
     *
     * @throws \Arcanedev\NoCaptcha\Exceptions\ApiException
     */
    private static function checkIsNotEmpty($name, $value)
    {
        if (empty($value)) {
            throw new Exceptions\ApiException("The {$name} must not be empty");
        }
    }

    /* -----------------------------------------------------------------
     |  Other Methods
     | -----------------------------------------------------------------
     */

    /**
     * Send verify request to API and get response.
     *
     * @param  array  $query
     *
     * @return \Arcanedev\NoCaptcha\Utilities\Response
     */
    private function sendVerifyRequest(array $query = [])
    {
        $query = array_filter($query);

        return $this->request->send(
            static::VERIFY_URL.'?'.http_build_query($query)
        );
    }

    /**
     * Get script source link.
     *
     * @param  string|null  $callbackName
     *
     * @return string
     */
    private function getScriptSrc($callbackName = null)
    {
        $queries = [];

        if ($this->hasLang())
            Arr::set($queries, 'hl', $this->lang);

        Arr::set($queries, 'render', $this->getSiteKey());

        if ($this->hasCallbackName($callbackName)) {
            Arr::set($queries, 'onload', $callbackName);
        }

        return static::CLIENT_URL . (count($queries) ? '?' . http_build_query($queries) : '');
    }

    /**
     * Transform the string to an Html serializable object
     *
     * @param  string  $html
     *
     * @return \Illuminate\Support\HtmlString
     */
    protected function toHtmlString($html)
    {
        return new HtmlString($html);
    }
}