<?php

namespace mtopcard;

class open_query
{
    private const OPENAPI_URL = 'https://openapi.xyzshops.cn/api.php/CardInfo/query';
//    private const OPENAPI_URL = 'http://39.101.140.116:8080/api.php/CardInfo/query';
    private const APPID = 'ea97586b4aa0c141e4456912f3325f7f';
    private const SECURE = '92c51d28e3405c923decf1b333cec3ce';

    public function validate($card_no)
    {
        $params = ['cardno' => $card_no, 'appid' => self::APPID];
        $params['sign'] = $this->sign($params);

        $resp = http_request(self::OPENAPI_URL,$params);
        if(empty($resp)) {
            return [false,[]];
        }

        $resp = json_decode($resp, true);
        if ($resp['code'] == 200) {
            $result = $resp['data'];
            return [true, $result];
        } else {
            return [false, []];
        }
    }

    private function sign($input)
    {
        $body = $this->body($input);
        $body .= "&key=" . self::SECURE;

        return md5($body);
    }

    private function check_empty($value)
    {
        if (!isset($value))
            return true;
        if ($value === null)
            return true;
        if (trim($value) === "")
            return true;

        return false;
    }

    private function body($params)
    {
        ksort($params);
        $body = "";
        $i = 0;
        foreach ($params as $k => $v)
        {
            if (false === $this->check_empty($v) && "@" != substr($v, 0, 1))
            {
                if ($i == 0) {
                    $body .= "$k" . "=" . urlencode($v);
                } else {
                    $body .= "&" . "$k" . "=" . urlencode($v);
                }
                $i++;
            }
        }
        return $body;
    }
}