69 lines
1.5 KiB
PHP
69 lines
1.5 KiB
PHP
<?php
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namespace Gregwar\CaptchaBundle\Validator;
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use Symfony\Component\Form\FormValidatorInterface;
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use Symfony\Component\HttpFoundation\Session\Session;
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use Symfony\Component\Form\FormInterface;
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use Symfony\Component\Form\FormError;
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/**
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* Captcha validator
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*
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* @author Gregwar <g.passault@gmail.com>
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*/
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class CaptchaValidator implements FormValidatorInterface
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{
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/**
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* Session
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*/
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private $session;
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/**
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* Session key to store the code
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*/
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private $key;
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public function __construct(Session $session, $key)
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{
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$this->session = $session;
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$this->key = $key;
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}
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public function validate(FormInterface $form)
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{
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$code = $form->getData();
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$excepted_code = $this->getExceptedCode();
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if (!($code && $excepted_code && is_string($code) && is_string($excepted_code)
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&& $this->niceize($code) == $this->niceize($excepted_code))) {
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$form->addError(new FormError('Bad code value'));
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}
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$this->session->remove($this->key);
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if ($this->session->has($this->key.'_fingerprint')) {
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$this->session->remove($this->key.'_fingerprint');
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}
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}
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/**
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* Retrieve the excepted CAPTCHA code
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*/
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private function getExceptedCode()
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{
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if ($this->session->has($this->key)) {
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return $this->session->get($this->key);
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}
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return null;
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}
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/**
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* Process the codes
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*/
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private function niceize($code)
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{
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return strtr(strtolower($code), 'oil', '01l');
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}
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}
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