drupal_set_message(t('The book outline has been updated.'));
}
}
else {
drupal_set_message(t('There was an error adding the post to the book.'), 'error');
}
}
/**
* Menu callback; builds a form to confirm removal of a node from the book.
*
* @see book_remove_form_submit()
*
* @ingroup forms
*/
function book_remove_form(&$form_state, $node) {
$form['#node'] = $node;
$title = array('%title' => $node->title);
if ($node->book['has_children']) {
$description = 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 {
$description = t('%title may be added to hierarchy again using the Outline tab.', $title);
}
return confirm_form($form, t('Are you sure you want to remove %title from the book hierarchy?', $title), 'node/'. $node->nid, $description, t('Remove'));
}
/**
* Confirm form submit function to remove a node from the book.
*
* @see book_remove_form()
*/
function book_remove_form_submit($form, &$form_state) {
$node = $form['#node'];
if ($node->nid != $node->book['bid']) {
// Only allowed when this is not a book (top-level page).
menu_link_delete($node->book['mlid']);
db_query('DELETE FROM {book} WHERE nid = %d', $node->nid);
drupal_set_message(t('The post has been removed from the book.'));
}
$form_state['redirect'] = 'node/'. $node->nid;
}
/**
* AJAX callback to replace the book parent select options.
*
* This function is called when the selected book is changed. It updates the
* cached form (either the node form or the book outline form) and returns
* rendered output to be used to replace the select containing the possible
* parent pages in the newly selected book.
*
* @param $build_id
* The form's build_id.
* @param $bid
* A bid from from among those in the form's book select.
* @return
* Prints the replacement HTML in JSON format.
*/
function book_form_update() {
$cid = 'form_'. $_POST['form_build_id'];
$bid = $_POST['book']['bid'];
$cache = cache_get($cid, 'cache_form');
if ($cache) {
$form = $cache->data;
// Validate the bid.
if (isset($form['book']['bid']['#options'][$bid])) {
