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<?php
namespace Drupal\node\Form;
use Drupal\Core\Database\Connection;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Form\ConfirmFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* Provides a form for reverting a node revision.
*/
class NodeRevisionDeleteForm extends ConfirmFormBase {
/**
* The node revision.
*
* @var \Drupal\node\NodeInterface
*/
protected $revision;
/**
* The node storage.
*
* @var \Drupal\Core\Entity\EntityStorageInterface
*/
protected $nodeStorage;
/**
* The node type storage.
*
* @var \Drupal\Core\Entity\EntityStorageInterface
*/
protected $nodeTypeStorage;
/**
* The database connection.
*
* @var \Drupal\Core\Database\Connection
*/
protected $connection;
/**
* Constructs a new NodeRevisionDeleteForm.
*
* @param \Drupal\Core\Entity\EntityStorageInterface $node_storage
* The node storage.
* @param \Drupal\Core\Entity\EntityStorageInterface $node_type_storage
* The node type storage.
* @param \Drupal\Core\Database\Connection $connection
* The database connection.
*/
public function __construct(EntityStorageInterface $node_storage, EntityStorageInterface $node_type_storage, Connection $connection) {
$this->nodeStorage = $node_storage;
$this->nodeTypeStorage = $node_type_storage;
$this->connection = $connection;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container) {
$entity_manager = $container->get('entity.manager');
return new static(
$entity_manager->getStorage('node'),
$entity_manager->getStorage('node_type'),
$container->get('database')
);
}
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'node_revision_delete_confirm';
}
/**
* {@inheritdoc}
*/
public function getQuestion() {
return t('Are you sure you want to delete the revision from %revision-date?', ['%revision-date' => format_date($this->revision->getRevisionCreationTime())]);
}
/**
* {@inheritdoc}
*/
public function getCancelUrl() {
return new Url('entity.node.version_history', ['node' => $this->revision->id()]);
}
/**
* {@inheritdoc}
*/
public function getConfirmText() {
return t('Delete');
}
/**
* {@inheritdoc}
*/
public function buildForm(array $form, FormStateInterface $form_state, $node_revision = NULL) {
$this->revision = $this->nodeStorage->loadRevision($node_revision);
$form = parent::buildForm($form, $form_state);
return $form;
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
$this->nodeStorage->deleteRevision($this->revision->getRevisionId());
$this->logger('content')->notice('@type: deleted %title revision %revision.', ['@type' => $this->revision->bundle(), '%title' => $this->revision->label(), '%revision' => $this->revision->getRevisionId()]);
$node_type = $this->nodeTypeStorage->load($this->revision->bundle())->label();
drupal_set_message(t('Revision from %revision-date of @type %title has been deleted.', ['%revision-date' => format_date($this->revision->getRevisionCreationTime()), '@type' => $node_type, '%title' => $this->revision->label()]));
$form_state->setRedirect(
'entity.node.canonical',
['node' => $this->revision->id()]
);
if ($this->connection->query('SELECT COUNT(DISTINCT vid) FROM {node_field_revision} WHERE nid = :nid', [':nid' => $this->revision->id()])->fetchField() > 1) {
$form_state->setRedirect(
'entity.node.version_history',
['node' => $this->revision->id()]
);
}
}
}