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<?php
namespace Drupal\Core\Entity;
use Drupal\Core\Config\Entity\ConfigDependencyDeleteFormTrait;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
/**
* Provides a trait for an entity deletion form.
*
* This trait relies on the StringTranslationTrait and the logger method added
* by FormBase.
*
* @ingroup entity_api
*/
trait EntityDeleteFormTrait {
use ConfigDependencyDeleteFormTrait;
/**
* Gets the entity of this form.
*
* Provided by \Drupal\Core\Entity\EntityForm.
*
* @return \Drupal\Core\Entity\EntityInterface
* The entity.
*/
abstract public function getEntity();
/**
* Gets the logger for a specific channel.
*
* Provided by \Drupal\Core\Form\FormBase.
*
* @param string $channel
* The name of the channel.
*
* @return \Psr\Log\LoggerInterface
* The logger for this channel.
*/
abstract protected function logger($channel);
/**
* {@inheritdoc}
*/
public function getQuestion() {
return $this->t('Are you sure you want to delete the @entity-type %label?', [
'@entity-type' => $this->getEntity()->getEntityType()->getLowercaseLabel(),
'%label' => $this->getEntity()->label(),
]);
}
/**
* {@inheritdoc}
*/
public function getConfirmText() {
return $this->t('Delete');
}
/**
* Gets the message to display to the user after deleting the entity.
*
* @return string
* The translated string of the deletion message.
*/
protected function getDeletionMessage() {
$entity = $this->getEntity();
return $this->t('The @entity-type %label has been deleted.', [
'@entity-type' => $entity->getEntityType()->getLowercaseLabel(),
'%label' => $entity->label(),
]);
}
/**
* {@inheritdoc}
*/
public function getCancelUrl() {
$entity = $this->getEntity();
if ($entity->hasLinkTemplate('collection')) {
// If available, return the collection URL.
return $entity->urlInfo('collection');
}
else {
// Otherwise fall back to the default link template.
return $entity->urlInfo();
}
}
/**
* Returns the URL where the user should be redirected after deletion.
*
* @return \Drupal\Core\Url
* The redirect URL.
*/
protected function getRedirectUrl() {
$entity = $this->getEntity();
if ($entity->hasLinkTemplate('collection')) {
// If available, return the collection URL.
return $entity->urlInfo('collection');
}
else {
// Otherwise fall back to the front page.
return Url::fromRoute('<front>');
}
}
/**
* Logs a message about the deleted entity.
*/
protected function logDeletionMessage() {
$entity = $this->getEntity();
$this->logger($entity->getEntityType()->getProvider())->notice('The @entity-type %label has been deleted.', [
'@entity-type' => $entity->getEntityType()->getLowercaseLabel(),
'%label' => $entity->label(),
]);
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
$this->getEntity()->delete();
drupal_set_message($this->getDeletionMessage());
$form_state->setRedirectUrl($this->getCancelUrl());
$this->logDeletionMessage();
}
}