<?php
namespace common\pay\huanqiu;

class PayUtils
{

     /**
     * @param array $data
     * @return string
     */
    //对字符串进行排序
    public  static function mkSign($data){
        if(!is_array($data)){
            return false;
        }
        $str = '';
        $flag = false;
        foreach ($data as $v){
            if(empty($v)){
                continue;
            }
            $str.=$v.'&';
        }
        $str = substr($str,0,strlen($str)-1);
        return $str;
    }
    

    // 获得签名方法
    public static function getSignature($str, $key) {
        $signature = "";
        if (function_exists('hash_hmac')) {
            $signature = bin2hex(hash_hmac("sha1", $str, $key, true));
        } else {
            $blocksize = 64;
            $hashfunc = 'sha1';
            if (strlen($key) > $blocksize) {
                $key = pack('H*', $hashfunc($key));
            }
            $key = str_pad($key, $blocksize, chr(0x00));
            $ipad = str_repeat(chr(0x36), $blocksize);
            $opad = str_repeat(chr(0x5c), $blocksize);
            $hmac = pack(
                'H*', $hashfunc(
                    ($key ^ $opad) . pack(
                        'H*', $hashfunc(
                            ($key ^ $ipad) . $str
                        )
                    )
                )
            );
            $signature = bin2hex($hmac);
        }
        return $signature;
    }

	/**
     * 发送post请求
     * @param string $url 请求地址
     * @param array $data post键值对数据
     * @return string
     */
    public static function sendPost($url,$data,$app_id,$privateKey) {
        $url .= '?p1='.$data['p1'].'&p2='.$data['p2'].'&p3='.$data['p3'].'&timestamp='.$data['timestamp'];
        file_put_contents('url.txt',$url);
        $str = PayUtils::mkSign($data);
        file_put_contents('str.txt',$str);
        if(empty($str)){
            return false;
        }
        $sign = strtoupper(PayUtils::getSignature($str,$privateKey));  //加密后(大写)：5F51F8065B325EC3491526612CB2A47B84E5E10B
        file_put_contents('sign.txt',$sign);
        $headers = array(
            'content-type:application/json',
            'access_key:'.$sign,
            'app_id:'.$app_id
        );

        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL,$url);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'GET');  
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($curl, CURLOPT_HTTPHEADER, $headers); 
        //执行命令
        $data = curl_exec($curl);
		$dat = print_r($data,true);
		file_put_contents("dat.txt",$dat);
        //关闭URL请求
        curl_close($curl);
        return $data;
    }


     /**
     * @param array $data  参数
     * @param string $secretKey
     * @return bool
     */
    
    // 回调验证函数
    public static function checkSign($data, $secretKey)
    {
	   if(floor($data['amount'])== $data['amount']){
          $amount             = sprintf("%.1f",$data['amount']);       //入金金额（美元） 
       } else {
          $amount = $data['amount'];
       }
	   
	   if(floor($data['exchangeRate'])== $data['exchangeRate']){
          $exchangeRate       = sprintf("%.1f",$data['exchangeRate']);       //入金金额（美元） 
       } else {
          $exchangeRate       = $data['exchangeRate']; //转换汇率
       }
	   
       
       $poundage           = sprintf("%.6f",$data['poundage']);      //手续费（美元）
       $merchantNo         = $data['merchantNo'];                    //商户的商户号
       $merchantOrderNo    = $data['merchantOrderNo'];               //商户订单号
       $orderNo            = $data['orderNo'];                       //FastPay 交易流水号
       $timestamp          = $data['timestamp'];                     //时间戳
       $sign               = $data['sign'];                          //签名

       $str = "{$amount}".'&'."{$exchangeRate}".'&'."{$poundage}".'&'."{$merchantNo}".'&'."{$merchantOrderNo}".'&'."{$orderNo}".'&'."{$timestamp}";     //加密字符串

       file_put_contents('huanqiustr.txt',$str);
       $sign_new =  PayUtils::getSignature($str,$secretKey);    //根据加密规则生成的新签名
	   $sign_new = strtoupper($sign_new);                       //加密后(大写)
       
       // 比较两者之间的规则   
       if($sign_new == $sign){
           return true;
       }else{
           return false;
       }

    }
    
}