<?php
/**
 * Created by PhpStorm.
 * User: stanley-king
 * Date: 2018/12/12
 * Time: 11:13 AM
 */

namespace openapi;

//class config
//{
//    const CONVERT_FCODE_API = "https://passport.lrlz.com/mobile/index.php";
//    const APP_ID = 'JYC_CHANNEL';
//    const APP_KEY = 'aa161e84685b42a6862dfa5552195240';
//    const RSA_PATH = BASE_ROOT_PATH . '/helper/openapi/keys/jyc_pri.pem';
//    const FCODE_FIELDS = ['appid','appkey','convert_sn','convert_type','batch_code','commonid','time','mobile','return_url'];
//}

class config
{
    const CONVERT_URL = "https://passport.lrlz.com/mobile/index.php";
    const APP_ID = 'DHKJ_CHANNEL';
    const APP_KEY = '13e5b127aed296ef6d490cd7cc4c161e';
    const RSA_PATH = BASE_ROOT_PATH . '/helper/openapi/keys/dhkj_pri.pem';
    const FIELDS = ['appid','appkey','convert_sn','convert_type','time','mobile','return_url'];
}

class GoodsConvertor
{
    static $pri_key = null;

    public function __construct()
    {
        if(self::$pri_key == null) {
            $pri_key = file_get_contents(config::RSA_PATH);
            self::$pri_key = openssl_get_privatekey($pri_key);
        }
    }

    public function fcode($params)
    {
        $body = $this->presign_body($params,config::FIELDS);
        $signed = $this->sign($body);
        $params['signed'] = $signed;
        $params['act'] = 'convert';
        $params['op']  = 'fcode';
        return config::CONVERT_URL . "?" . http_build_query($params);
    }

    public function user($params)
    {
        $body = $this->presign_body($params,config::FIELDS);
        $signed = $this->sign($body);
        $params['signed'] = $signed;
        $params['act'] = 'convert';
        $params['op']  = 'user';
        return config::CONVERT_URL . "?" . http_build_query($params);
    }

    private function sign($body)
    {
        openssl_sign($body, $signed, self::$pri_key);
        $signed = base64_encode($signed);
        return $signed;
    }

    private function presign_body($input,$fields)
    {
        ksort($input);
        reset($input);

        $params = [];
        foreach ($input as $key => $val)
        {
            if(in_array($key,$fields)) {
                $params[] = "{$key}={$val}";
            }
        }

        return implode('&',$params);
    }
}