<?php
namespace app\api\logic;
use app\common\model\city\City;

class CityLogic
{

    /**
     * @notes 获取城市列表
     * @return array
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     * @author cjhao
     * @date 2024/10/6 17:49
     */
    public function getCityLists()
    {
        $lists = City::where(['level'=>2])->select()->toArray();
        $cityLists = [];
        foreach ($lists as $city){
            $parent = $cityLists[$city['parent_id']] ?? [];
            if($parent){
                $parent['sons'][] =[
                    'id'    => $city['city_id'],
                    'name'  => $city['name'],
                ];
            }else{
                $parent = [
                    'id'    => $city['parent_id'],
                    'name'  => $city['parent_name'],
                    'sons'  => [
                        [
                            'id'    => $city['city_id'],
                            'name'  => $city['name'],
                        ],
                    ],
                ];
            }
            $cityLists[$city['parent_id']] = $parent;
        }
        return array_values($cityLists);
    }
}