CaptchaBundle/Type/CaptchaType.php

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<?php
namespace Gregwar\CaptchaBundle\Type;
use Symfony\Component\HttpFoundation\Session;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
use Symfony\Component\Form\Exception\FormException;
use Gregwar\CaptchaBundle\Validator\CaptchaValidator;
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use Gregwar\CaptchaBundle\Generator\CaptchaGenerator;
use Gregwar\CaptchaBundle\DataTransformer\EmptyTransformer;
/**
* Captcha type
*
* @author Gregwar <g.passault@gmail.com>
*/
class CaptchaType extends AbstractType
{
/**
* Options
* @var array
*/
private $options = array();
/**
* Session key
* @var string
*/
private $key = 'captcha';
public function __construct(Session $session, $config)
{
$this->session = $session;
$this->options = $config;
}
public function buildForm(FormBuilder $builder, array $options)
{
$this->key = $builder->getForm()->getName();
$builder->addValidator(
new CaptchaValidator($this->session, $this->key)
);
}
public function buildView(FormView $view, FormInterface $form)
{
$fingerprint = null;
if ($this->options['keep_value'] && $this->session->has($this->key.'_fingerprint')) {
$fingerprint = $this->session->get($this->key.'_fingerprint');
}
$generator = new CaptchaGenerator($this->generateCaptchaValue(),
$this->options['image_folder'],
$this->options['web_path'],
$this->options['gc_freq'],
$this->options['expiration'],
$this->options['font'],
$fingerprint,
$this->options['quality']);
if ($this->options['as_file']) {
$view->set('captcha_code', $generator->getFile($this->options['width'], $this->options['height']));
} else {
$view->set('captcha_code', $generator->getCode($this->options['width'], $this->options['height']));
}
$view->set('captcha_width', $this->options['width']);
$view->set('captcha_height', $this->options['height']);
if ($this->options['keep_value']) {
$this->session->set($this->key.'_fingerprint', $generator->getFingerprint());
}
$view->set('value', '');
}
public function getDefaultOptions(array $options = array())
{
$this->options = array_replace($this->options, $options);
$this->options['property_path'] = false;
return $this->options;
}
public function getParent(array $options)
{
return 'text';
}
public function getName()
{
return 'captcha';
}
private function generateCaptchaValue()
{
if (!$this->options['keep_value'] || !$this->session->has($this->key)) {
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$value = '';
$chars = str_split($this->options['charset']);
for ($i=0; $i<$this->options['length']; $i++) {
$value.= $chars[array_rand($chars)];
}
$this->session->set($this->key, $value);
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} else {
$value = $this->session->get($this->key);
}
return $value;
}
}