<?php

namespace app\common\model;

use think\db\exception\DataNotFoundException;
use think\db\exception\ModelNotFoundException;
use think\exception\DbException;
use think\Model;

class UserPathModel extends Model
{

    protected $name = "user_path";


    /**
     * 创建网体
     * @param int $newUserID
     * @param int $parentID
     * @return void
     * @throws DataNotFoundException
     * @throws DbException
     * @throws ModelNotFoundException
     */
    public function createPath(int $newUserID, int $parentID)
    {
        if ($parentID == 0) {
            return;
        }


        $parentIDs = $this->getAllParentIDs($parentID); // 查询直接父级的所有上级
        array_unshift($parentIDs, $parentID);  // 直接父级放开头

        // 循环插入
        foreach ($parentIDs as $k => $v) {
            $this->insert([
                'user_id'   => $newUserID,
                'parent_id' => $v,
                'distance'  => $k + 1,
            ]);
        }
    }

    /**
     * 获取直属上级ID
     * @param int $uid
     * @param int $distance
     * @return int
     * @throws DataNotFoundException
     * @throws DbException
     * @throws ModelNotFoundException
     */
    public function getParentID(int $uid, int $distance = 1): int
    {
        $path = $this->where(['user_id' => $uid, 'distance' => $distance])->field('parent_id')->find();
        if (!is_null($path)) {
            return $path['parent_id'];
        }
        return 0;
    }

    /**
     * 获取所有上级ID
     * @param int $uid
     * @return array
     * @throws DataNotFoundException
     * @throws DbException
     * @throws ModelNotFoundException
     */
    public function getAllParentIDs(int $uid): array
    {
        $parentIDs = [];
        $paths     = $this->where('user_id', $uid)->field('parent_id')->order('distance', 'asc')->select();
        if (!is_null($paths)) {
            foreach ($paths as $v) {
                $parentIDs[] = $v['parent_id'];
            }
        }
        return $parentIDs;
    }


}