src/Form/Subscriber/CountrySubscriber.php line 49

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  1. <?php
  4. namespace App\Form\Subscriber;
  7. use App\Entity\Common\Country;
  8. use App\Entity\Common\County;
  9. use Doctrine\ORM\EntityManagerInterface;
  10. use Doctrine\ORM\EntityRepository;
  11. use Symfony\Bridge\Doctrine\Form\Type\EntityType;
  12. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  13. use Symfony\Component\Form\FormEvent;
  14. use Symfony\Component\Form\FormEvents;
  16. class CountrySubscriber implements EventSubscriberInterface
  17. {
  18.     /**
  19.      * @var EntityManagerInterface
  20.      */
  21.     private EntityManagerInterface $em;
  23.     public function __construct(EntityManagerInterface $em)
  24.     {
  25.         $this->em = $em;
  26.     }
  28.     /**
  29.      * @inheritDoc
  30.      */
  31.     public static function getSubscribedEvents()
  32.     {
  33.         return [
  34.             FormEvents::PRE_SET_DATA => 'onPreSetData',
  35.             FormEvents::POST_SUBMIT => 'onPostSubmit'
  36.         ];
  37.     }
  39.     /**
  40.      * Adds *county* field to checkout form
  41.      *
  42.      * Available options of this field depend on the value of
  43.      * *country* field. If a valid country value exists,
  44.      * then only counties of that country will be loaded, otherwise
  45.      * an empty dropdown should be presented to end user.
  46.      *
  47.      * @param FormEvent $event
  48.      */
  49.     public function onPreSetData(FormEvent $event)
  50.     {
  51.         $country = $event->getData();
  52.         $form = $event->getForm()->getParent();
  53.         if (null !== $country) {
  54.             $form->add('county', EntityType::class, [
  55.                 'required' => false,
  56.                 'class' => County::class,
  57.                 'choice_label' => 'name',
  58.                 'placeholder' => 'Επιλέξτε νομό',
  59.                 'query_builder' => function (EntityRepository $er) use ($country) {
  60.                     return $er->createQueryBuilder('c')
  61.                         ->where('c.country = :country')
  62.                         ->setParameter('country', $country)
  63.                         ->orderBy('c.name');
  64.                 },
  65.                 'label' => '* Νομός'
  66.             ]);
  67.         } else {
  68.             $country = $this->em->getRepository(Country::class)->find(86);
  69.             $form->add('county', EntityType::class, [
  70.                 'required' => false,
  71.                 'class' => County::class,
  72.                 'choice_label' => 'name',
  73.                 'placeholder' => 'Επιλέξτε νομό',
  74.                 'label' => '* Νομός'
  75.             ]);
  76.         }
  77.     }
  79.     /**
  80.      * Populates *county* form field according to selected country
  81.      *
  82.      * @param FormEvent $event
  83.      */
  84.     public function onPostSubmit(FormEvent $event)
  85.     {
  86.         $countryId = $event->getData();
  87.         $country = $this->em->getRepository(Country::class)->find($countryId);
  88.         if (null !== $country) {
  89.             $form = $event->getForm()->getParent();
  90.             $form->add('county', EntityType::class, [
  91.                 'class' => County::class,
  92.                 'choice_label' => 'name',
  93.                 'placeholder' => 'Επιλέξτε νομό',
  94.                 'query_builder' => function (EntityRepository $er) use ($country) {
  95.                     return $er->createQueryBuilder('c')
  96.                         ->where('c.country = :country')
  97.                         ->setParameter('country', $country)
  98.                         ->orderBy('c.name');
  99.                 },
  100.                 'label' => '* Νομός'
  101.             ]);
  102.         }
  103.     }
  104. }