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\RapsysPackBundle;
  15 use Rapsys\PackBundle\Util\ImageUtil;
  16 use Rapsys\PackBundle\Util\SluggerUtil;
  17
  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\FormError;
  23 use Symfony\Component\Form\FormEvent;
  24 use Symfony\Component\Form\FormEvents;
  25 use Symfony\Component\OptionsResolver\OptionsResolver;
  26 use Symfony\Contracts\Translation\TranslatorInterface;
  27
  28 /**
  29  * Captcha Type class definition
  30  *
  31  * @see https://symfony.com/doc/current/form/create_custom_field_type.html
  32  */
  33 class CaptchaType extends AbstractType {
  34         /**
  35          * Constructor
  36          *
  37          * @param ?ImageUtil $image The image instance
  38          * @param ?SluggerUtil $slugger The slugger instance
  39          * @param ?TranslatorInterface $translator The translator instance
  40          */
  41         public function __construct(protected ?ImageUtil $image = null, protected ?SluggerUtil $slugger = null, protected ?TranslatorInterface $translator = null) {
  42         }
  43
  44         /**
  45          * {@inheritdoc}
  46          *
  47          * Build form
  48          */
  49         public function buildForm(FormBuilderInterface $builder, array $options): void {
  50                 //With image, slugger and translator
  51                 if (!empty($options['captcha']) && $this->image !== null && $this->slugger !== null && $this->translator !== null) {
  52                         //Set captcha
  53                         $captcha = $this->image->getCaptcha();
  54
  55                         //Add captcha token
  56                         $builder->add('_captcha_token', HiddenType::class, ['data' => $captcha['token'], 'empty_data' => $captcha['token'], 'mapped' => false]);
  57
  58                         //Add captcha
  59                         $builder->add('captcha', IntegerType::class, ['label_attr' => ['class' => 'captcha'], 'label' => '<img src="'.htmlentities($captcha['src']).'" alt="'.htmlentities($captcha['equation']).'" />', 'label_html' => true, 'mapped' => false, 'translation_domain' => false]);
  60
  61                         //Add event listener on captcha
  62                         $builder->addEventListener(FormEvents::PRE_SUBMIT, [$this, 'validateCaptcha']);
  63                 }
  64         }
  65
  66         /**
  67          * {@inheritdoc}
  68          */
  69         public function configureOptions(OptionsResolver $resolver): void {
  70                 //Call parent configure options
  71                 parent::configureOptions($resolver);
  72
  73                 //Set defaults
  74                 $resolver->setDefaults(['captcha' => false, 'translation_domain' => RapsysPackBundle::getAlias()]);
  75
  76                 //Add extra captcha option
  77                 $resolver->setAllowedTypes('captcha', 'boolean');
  78         }
  79
  80         /**
  81          * Validate captcha
  82          *
  83          * @param FormEvent $event The form event
  84          */
  85         public function validateCaptcha(FormEvent $event): void {
  86                 //Get form
  87                 $form = $event->getForm();
  88
  89                 //Get event data
  90                 $data = $event->getData();
  91
  92                 //Set token
  93                 $token = $form->get('_captcha_token')->getConfig()->getData();
  94
  95                 //Without captcha
  96                 if (empty($data['captcha'])) {
  97                         //Add error on captcha
  98                         $form->addError(new FormError($this->translator->trans('Captcha is empty')));
  99
 100                         //Reset captcha token
 101                         $data['_captcha_token'] = $token;
 102
 103                         //Set event data
 104                         $event->setData($data);
 105                 //With invalid captcha
 106                 } elseif ($this->slugger->hash($data['captcha']) !== $data['_captcha_token']) {
 107                         //Add error on captcha
 108                         $form->addError(new FormError($this->translator->trans('Captcha is invalid')));
 109
 110                         //Reset captcha token
 111                         $data['_captcha_token'] = $token;
 112
 113                         //Set event data
 114                         $event->setData($data);
 115                 }
 116         }
 117 }