<?php

namespace app\models\common;

use Yii;
use yii\base\Model;
use yii\db\ActiveRecord;

class OpenClient
{
    var $gateway;
    var $appkey;
    var $app_secret;
    var $access_token;

    function __construct($gateway, $appkey, $app_secret, $access_token)
    {
        $this->gateway = $gateway;
        $this->appkey = $appkey;
        $this->app_secret = $app_secret;
        $this->access_token = $access_token;
    }

    function getMillisecond()
    {
        list($t1, $t2) = explode(' ', microtime());
        return (float)sprintf('%.0f', (floatval($t1) + floatval($t2)) * 1000);
    }

    private function sign($appkey, $timestamp, $nonce, $access_token, $api, $secret, $biz_params)
    {
        $unsignRequestParams = array(
            'appkey' => $appkey,
            'timestamp' => $timestamp,
            'nonce' => $nonce,
            'api' => $api
        );
        if ($access_token != NULL) {
            $unsignRequestParams["access_token"] = $access_token;
        }
        ksort($unsignRequestParams);
        $unsignStr = '';
        foreach ($unsignRequestParams as $key => $value) {
            $unsignStr = $unsignStr . $key . '=' . $value . '&';
        }
        $unsignStr = $unsignStr . 'body=' . $biz_params;
        $unsignStr = $unsignStr . '&secret=' . $secret;
        return sha1($unsignStr);
    }

    function request($api, $apiParam)
    {
        $bodyStr = $apiParam == NULL ? "" : json_encode($apiParam);
        $timestamp = $this->getMillisecond();
        $nonce = mt_rand(0, 1000000);
        $sign = $this->sign($this->appkey, $timestamp, $nonce, $this->access_token, $api, $this->app_secret, $bodyStr);

        $url = $this->gateway . '?appkey=' . $this->appkey . '&timestamp=' . $timestamp . '&nonce=' . $nonce . '&access_token=' . $this->access_token . '&api=' . $api . '&sign=' . $sign;

        $options = array(
            'http' => array(
                'header' => "Content-type: application/json; charset=utf-8",
                'method' => 'POST',
                'content' => $bodyStr
            )
        );
        $context = stream_context_create($options);
        $result = file_get_contents($url, false, $context);
        if ($result === FALSE) {
            throw new Exception("请求gateway异常");
        }

        return json_decode($result, true);
    }

}


?>