/**
* Duplicate a page and its descendants.
*
* @param Page $page The page to be duplicated.
* @param string|null $title Optional, the title of the copy, if null (default) the title of the copied page.
* @param Page|null $parent Optional, the parent of the copy, if null (default) the parent of the copied page.
*
* @return Page The copy of the page.
*
* @throws InvalidArgumentException Raises if the page is recursively duplicated in itself.
*/
private function duplicateRecursively(Page $page, $title = null, Page $parent = null)
{
if (null !== $parent && true === $parent->isDescendantOf($page)) {
throw new InvalidArgumentException('Cannot recursively duplicate a page in itself');
}
// Storing current children before clonage
$children = $this->getDescendants($page, 1);
// Cloning the page
$new_page = $this->copy($page, $title, $parent);
$this->_em->flush($new_page);
// Cloning children
foreach (array_reverse($children) as $child) {
if (!(Page::STATE_DELETED & $child->getState())) {
$new_child = $this->duplicateRecursively($child, null, $new_page);
$new_page->cloningData = array_merge_recursive($new_page->cloningData, $new_child->cloningData);
}
}
return $new_page;
}
