<?php
/**
 * Author: cfn <cfn@leapy.cn>
 */

namespace App\Utils;

use Hyperf\Context\ApplicationContext;
use Hyperf\HttpServer\Contract\RequestInterface;

class Param
{
    /**
     * @param array $data
     * @param array|null $param
     * @return array
     */
    static function only(array $data, array $param = null): array
    {
        if (empty($param)) {
            $container = ApplicationContext::getContainer();
            $request = $container->get(RequestInterface::class); // 代理对象
            $param = $request->all();
        }

        $_arr = [];
        foreach ($data as $k => $v) {
            if (gettype($k) == "integer") {
                isset($param[$v]) && $_arr[$v] = $param[$v];
            } else {
                $_arr[$k] = $param[$k] ?? $v;
            }
        }
        return $_arr;
    }
}