<?php

namespace App\Model;

use App\Model\Traits\TableTrait;
use Dcat\Admin\Traits\ModelTree;
use Illuminate\Database\Eloquent\Model;

class ProvinceCityArea extends Model
{
    use TableTrait;

    public $timestamps = false;

    public static function toTree()
    {
        $data = ProvinceCityArea::select('*')->whereIn('type', ['province', 'city', 'area'])->get()->toArray();
        $tree = self::_tree($data, 0);
        return $tree;
    }

    private static function _tree($array, $parentId = 0)
    {
        $tree = array();

        foreach ($array as $item) {
            if ($item['parent_id'] == $parentId) {
                $children = self::_tree($array, $item['id']);
                if (!empty($children)) {
                    $item['children'] = $children;
                }
                $tree[] = $item;
            }
        }
        return $tree;
    }
}