/**
* Save the tree.
*
* @param TreeBuilder $builder
* @param array $items
* @param null $parent
*/
public function save(TreeBuilder $builder, array $items = [], $parent = null)
{
$model = $builder->getTreeModel();
$items = $items ?: $builder->getRequestValue('items');
foreach ($items as $index => $item) {
/* @var EloquentModel $entry */
$entry = $model->find($item['id']);
$entry->{$builder->getTreeOption('sort_column', 'sort_order')} = $index + 1;
$entry->{$builder->getTreeOption('parent_column', 'parent_id')} = $parent;
$entry->save();
if (isset($item['children'])) {
$this->save($builder, $item['children'], $item['id']);
}
}
}