function book_form_node_confirm_form_alter in Drupal 8
Same name and namespace in other branches
- 9 core/modules/book/book.module \book_form_node_confirm_form_alter()
Implements hook_form_BASE_FORM_ID_alter() for \Drupal\node\Form\NodeDeleteForm.
Alters the confirm form for a single node deletion.
File
- core/
modules/ book/ book.module, line 331 - Allows users to create and organize related content in an outline.
Code
function book_form_node_confirm_form_alter(&$form, FormStateInterface $form_state) {
// Only need to alter the delete operation form.
if ($form_state
->getFormObject()
->getOperation() !== 'delete') {
return;
}
/** @var \Drupal\node\NodeInterface $node */
$node = $form_state
->getFormObject()
->getEntity();
if (!book_type_is_allowed($node
->getType())) {
// Not a book node.
return;
}
if (isset($node->book) && $node->book['has_children']) {
$form['book_warning'] = [
'#markup' => '<p>' . t('%title is part of a book outline, and has associated child pages. If you proceed with deletion, the child pages will be relocated automatically.', [
'%title' => $node
->label(),
]) . '</p>',
'#weight' => -10,
];
}
}