contacts_events-8.x-1.x-dev/modules/villages/src/Form/VillageGroupForm.php

<?php

namespace Drupal\contacts_events_villages\Form;

use Drupal\Core\Entity\ContentEntityForm;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

/**
 * Form controller for Camping village group edit forms.
 *
 * @ingroup contacts_events_villages
 */
class VillageGroupForm extends ContentEntityForm {

  /**
   * {@inheritdoc}
   */
  public function getEntityFromRouteMatch(RouteMatchInterface $route_match, $entity_type_id) {
    /** @var \Drupal\contacts_events_villages\Entity\VillageGroup $entity */
    $entity = parent::getEntityFromRouteMatch($route_match, $entity_type_id);

    // Pre-populate event ID from URL.
    if ($entity->isNew()) {
      $event = $route_match->getParameter('contacts_event');
      $entity->setEvent($event);
    }
    elseif ($entity->get('event')->isEmpty()) {
      throw new NotFoundHttpException('Invalid event.');
    }

    return $entity;
  }

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    /** @var \Drupal\contacts_events_villages\Entity\VillageGroup $entity */
    $entity = parent::validateForm($form, $form_state);

    /** @var \Drupal\contacts_events_villages\Plugin\VillageGroupTypeManager $plugin_manager */
    $plugin_manager = \Drupal::service('plugin.manager.c_events_village_group_type');
    /** @var \Drupal\contacts_events_villages\Plugin\VillageGroupTypeInterface $type_plugin */
    $type_plugin = $plugin_manager->createInstance($entity->bundle());

    // Check that an exiting entity does not already exist.
    $existing = $type_plugin->getExisting($entity);
    $error_message = $this->t('A group already exists for the following configuration.');
    if ($entity->isNew() && !$existing->isNew()) {
      $form_state->setErrorByName(NULL, $error_message);
    }
    elseif (!$entity->isNew() && $existing->isNew()) {
      $form_state->setErrorByName(NULL, $error_message);
    }
    elseif (!$entity->isNew() && !$existing->isNew() && $existing->id() !== $entity->id()) {
      $form_state->setErrorByName(NULL, $error_message);
    }

    return $entity;
  }

  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {
    /** @var \Drupal\contacts_events_villages\Entity\VillageGroup $entity */
    $entity = $this->entity;

    $status = parent::save($form, $form_state);

    switch ($status) {
      case SAVED_NEW:
        $this->messenger()->addMessage($this->t('Created the %label Camping village group.', [
          '%label' => $entity->label(),
        ]));
        break;

      default:
        $this->messenger()->addMessage($this->t('Saved the %label Camping village group.', [
          '%label' => $entity->label(),
        ]));
    }
    $form_state->setRedirect('entity.c_events_village_group.collection', [
      'contacts_event' => $entity->getEventId(),
    ]);
  }

}