/**
* Creates a {@link Blueprint} instance from an {@link ActiveRecord\Query}.
*
* @param Query $query
*
* @return Blueprint
*/
public static function from(Query $query)
{
$query->mode(\PDO::FETCH_CLASS, __NAMESPACE__ . '\\BluePrintNode');
$relation = array();
$children = array();
$index = array();
foreach ($query as $row) {
$row->parent = null;
$row->depth = null;
$row->children = array();
$nid = $row->nid;
$parent_id = $row->parentid;
$index[$nid] = $row;
$relation[$nid] = $parent_id;
$children[$parent_id][$nid] = $nid;
}
$tree = array();
foreach ($index as $nid => $page) {
if (!$page->parentid || empty($index[$page->parentid])) {
$tree[$nid] = $page;
continue;
}
$page->parent = $index[$page->parentid];
$page->parent->children[$nid] = $page;
}
self::set_depth($tree);
return new static($query->model, $relation, $children, $index, $tree);
}
