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<?php
namespace Drupal\book\Form;
use Drupal\book\BookManagerInterface;
use Drupal\Core\Form\ConfirmFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\node\NodeInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* Remove form for book module.
*/
class BookRemoveForm extends ConfirmFormBase {
/**
* The book manager.
*
* @var \Drupal\book\BookManagerInterface
*/
protected $bookManager;
/**
* The node representing the book.
*
* @var \Drupal\node\NodeInterface
*/
protected $node;
/**
* Constructs a BookRemoveForm object.
*
* @param \Drupal\book\BookManagerInterface $book_manager
* The book manager.
*/
public function __construct(BookManagerInterface $book_manager) {
$this->bookManager = $book_manager;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container) {
return new static(
$container->get('book.manager')
);
}
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'book_remove_form';
}
/**
* {@inheritdoc}
*/
public function buildForm(array $form, FormStateInterface $form_state, NodeInterface $node = NULL) {
$this->node = $node;
return parent::buildForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function getDescription() {
$title = ['%title' => $this->node->label()];
if ($this->node->book['has_children']) {
return $this->t('%title has associated child pages, which will be relocated automatically to maintain their connection to the book. To recreate the hierarchy (as it was before removing this page), %title may be added again using the Outline tab, and each of its former child pages will need to be relocated manually.', $title);
}
else {
return $this->t('%title may be added to hierarchy again using the Outline tab.', $title);
}
}
/**
* {@inheritdoc}
*/
public function getConfirmText() {
return $this->t('Remove');
}
/**
* {@inheritdoc}
*/
public function getQuestion() {
return $this->t('Are you sure you want to remove %title from the book hierarchy?', ['%title' => $this->node->label()]);
}
/**
* {@inheritdoc}
*/
public function getCancelUrl() {
return $this->node->urlInfo();
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
if ($this->bookManager->checkNodeIsRemovable($this->node)) {
$this->bookManager->deleteFromBook($this->node->id());
drupal_set_message($this->t('The post has been removed from the book.'));
}
$form_state->setRedirectUrl($this->getCancelUrl());
}
}