<?php
namespace addons\csmadmin\library;


class CsmTree
{
    /**
          * 获取当前节点的父节点
     */
    public static function getParentNode($id,$dao,$parentidname){
        $parentids = [];
        static::_lispParentNode($parentids,$id,$dao,$parentidname);
    }
    private static function _lispParentNode(&$parentids,$id,$dao,$parentidname){
        $row = $dao->where('id','=',$id)->find();
        if($row==null || $row->$parentidname==0 || $row->$parentidname==-1){
            return null;
        }else{
            $ret = $row->$parentidname;
            if($ret){
                $parentids[] = $ret;
            }
            return static::_lispParentNode($parentids,$row->$parentidname,$dao,$parentidname);
        }
    }
 
}