Raphaël G. Git Repositories - packbundle/blob - Form/CaptchaType.php

   1 <?php declare(strict_types=1);
   2
   3 /*
   4  * This file is part of the Rapsys PackBundle package.
   5  *
   6  * (c) Raphaël Gertz <symfony@rapsys.eu>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Rapsys\PackBundle\Form;
  13
  14 use Rapsys\PackBundle\Util\ImageUtil;
  15 use Rapsys\PackBundle\Util\SluggerUtil;
  16
  17 use Symfony\Contracts\Translation\TranslatorInterface;
  18 use Symfony\Component\Form\AbstractType;
  19 use Symfony\Component\Form\Extension\Core\Type\HiddenType;
  20 use Symfony\Component\Form\Extension\Core\Type\IntegerType;
  21 use Symfony\Component\Form\FormBuilderInterface;
  22 use Symfony\Component\Form\FormEvents;
  23 use Symfony\Component\Form\FormEvent;
  24 use Symfony\Component\Form\FormError;
  25
  26 /**
  27  * Captcha Type class definition
  28  *
  29  * @see https://symfony.com/doc/current/form/create_custom_field_type.html
  30  */
  31 class CaptchaType extends AbstractType {
  32         /**
  33          * Constructor
  34          *
  35          * @param ImageUtil $image
  36          * @param SluggerUtil $slugger
  37          * @param TranslatorInterface $translator The translator instance
  38          */
  39         public function __construct(protected ImageUtil $image, protected SluggerUtil $slugger, protected TranslatorInterface $translator) {
  40         }
  41
  42         /**
  43          * Build form
  44          *
  45          * {@inheritdoc}
  46          */
  47         public function buildForm(FormBuilderInterface $builder, array $options): void {
  48                 //Set captcha
  49                 $captcha = $this->image->getCaptcha((new \DateTime('-1 year'))->getTimestamp());
  50
  51                 //Add captcha token
  52                 $builder->add('_captcha_token', HiddenType::class, ['data' => $captcha['token'], 'empty_data' => $captcha['token']]);
  53
  54                 //Add captcha
  55                 $builder->add('captcha', IntegerType::class, ['label_attr' => ['class' => 'captcha'], 'label' => '<img src="'.htmlentities($captcha['src']).'" alt="'.htmlentities($captcha['equation']).'" />', 'label_html' => true, 'translation_domain' => false]);
  56
  57                 //Add event listener on captcha
  58                 $builder->addEventListener(FormEvents::PRE_SUBMIT, [$this, 'validateCaptcha']);
  59     }
  60
  61         /**
  62          * Validate captcha
  63          *
  64          * @param FormEvent $event The form event
  65          */
  66         public function validateCaptcha(FormEvent $event): void {
  67                 //Get form
  68                 $form = $event->getForm();
  69
  70                 //Get event data
  71                 $data = $event->getData();
  72
  73                 //Set token
  74                 $token = $form->get('_captcha_token')->getConfig()->getData();
  75
  76                 //Without captcha
  77                 if (empty($data['captcha'])) {
  78                         //Add error on captcha
  79                         $form->addError(new FormError($this->translator->trans('Captcha is empty')));
  80
  81                         //Reset captcha token
  82                         $data['_captcha_token'] = $token;
  83
  84                         //Set event data
  85                         $event->setData($data);
  86                 //With invalid captcha
  87                 } elseif ($this->slugger->hash($data['captcha']) !== $data['_captcha_token']) {
  88                         //Add error on captcha
  89                         $form->addError(new FormError($this->translator->trans('Captcha is invalid')));
  90
  91                         //Reset captcha token
  92                         $data['_captcha_token'] = $token;
  93
  94                         //Set event data
  95                         $event->setData($data);
  96                 }
  97         }
  98 }