<?php

/**
 *    配置账号信息
 */
class WxPayConfPub
{
    public static $APPID;
    public static $APPSECRET;
    public static $MCHID;
    public static $KEY;
    public static $SSLCERT_PATH;
    public static $SSLKEY_PATH;
    //=======【基本信息设置】=====================================

    //=======【异步通知url设置】===================================
    //异步通知url，商户根据实际开发过程设定
    //const NOTIFY_URL = 'https://tiantianxinye.langye.net/customer/pay-callback';

    //=======【curl超时设置】===================================
    //本例程通过curl使用HTTP POST方法，此处可修改其超时时间，默认为30秒
    const CURL_TIMEOUT = 30;

    public function __construct($project_id, $merchant_id = null)
    {
        if ($merchant_id) {
            $wechatpayAccount = \App\Models\WechatpayAccount::where("mchid", $merchant_id)->first();
        } else {
            $project = \App\Models\Project::with("wechatpayAccount")->find($project_id);
            $wechatpayAccount = $project->wechatpayAccount;
        }

        self::$APPID = env("WEIXINPAY_APPID");
        self::$APPSECRET = env("WEIXINPAY_APPSECRET");
        self::$MCHID = $wechatpayAccount->mchid;
        self::$KEY = $wechatpayAccount->key;
        self::$SSLCERT_PATH = env("WEIXINPAY_CERT_PUBLIC_PATH") . $wechatpayAccount->mchid . "/apiclient_cert.pem";
        self::$SSLKEY_PATH = env("WEIXINPAY_CERT_PUBLIC_PATH") . $wechatpayAccount->mchid . "/apiclient_key.pem";
    }
}

class SDKRuntimeException extends Exception
{
    public function errorMessage()
    {
        return $this->getMessage();
    }

}

class CommonUtilPub
{
    public $project_id;
    public $merchant_id;

    function __construct($project_id, $merchant_id = null)
    {
        $this->project_id = $project_id;
        $this->merchant_id = $merchant_id;
    }

    function trimString($value)
    {
        $ret = null;
        if (null != $value) {
            $ret = $value;
            if (strlen($ret) == 0) {
                $ret = null;
            }
        }
        return $ret;
    }

    /**
     *    作用：产生随机字符串，不长于32位
     */
    public function createNoncestr($length = 32)
    {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    /**
     *    作用：格式化参数，签名过程需要使用
     */
    function formatBizQueryParaMap($paraMap, $urlencode)
    {
        $buff = "";
        ksort($paraMap);
        foreach ($paraMap as $k => $v) {
            if ($urlencode) {
                $v = urlencode($v);
            }
            //$buff .= strtolower($k) . "=" . $v . "&";
            $buff .= $k . "=" . $v . "&";
        }
        $reqPar = "";
        if (strlen($buff) > 0) {
            $reqPar = substr($buff, 0, strlen($buff) - 1);
        }
        return $reqPar;
    }

    /**
     *    作用：生成签名
     */
    public function getSign($Obj)
    {
        foreach ($Obj as $k => $v) {
            $Parameters[$k] = $v;
        }
        //签名步骤一：按字典序排序参数
        ksort($Parameters);
        $String = $this->formatBizQueryParaMap($Parameters, false);
        //echo '【string1】'.$String.'</br>';
        //签名步骤二：在string后加入KEY
        $KEY = (new WxPayConfPub($this->project_id, $this->merchant_id))::$KEY;
        $String = $String . "&key=" . $KEY;
        //echo "【string2】".$String."</br>";
        //签名步骤三：MD5加密
        $String = md5($String);
        //echo "【string3】 ".$String."</br>";
        //签名步骤四：所有字符转为大写
        $result_ = strtoupper($String);
        //echo "【result】 ".$result_."</br>";
        return $result_;
    }

    /**
     *    作用：array转xml
     */
    function arrayToXml($arr)
    {
        $xml = "<xml>";
        foreach ($arr as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";

            } else
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
        }
        $xml .= "</xml>";
        return $xml;
    }

    /**
     *    作用：将xml转为array
     */
    public function xmlToArray($xml)
    {
        //将XML转为array
        $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $array_data;
    }

    /**
     *    作用：以post方式提交xml到对应的接口url
     */
    public function postXmlCurl($xml, $url, $second = 30)
    {
        //初始化curl
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, TRUE);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        //运行curl
        $data = curl_exec($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error" . "<br>";
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }
    }

    /**
     *    作用：使用证书，以post方式提交xml到对应的接口url
     */
    function postXmlSSLCurl($xml, $url, $second = 30)
    {
        $ch = curl_init();
        $WxPayConfPub = new WxPayConfPub($this->project_id, $this->merchant_id);
        //超时时间
        curl_setopt($ch, CURLOPT_TIMEOUT, $second);
        //这里设置代理，如果有的话
        //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        //设置header
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        //要求结果为字符串且输出到屏幕上
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //设置证书
        //使用证书：cert 与 key 分别属于两个.pem文件
        //默认格式为PEM，可以注释
        curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLCERT, $WxPayConfPub::$SSLCERT_PATH);
        //默认格式为PEM，可以注释
        curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
        curl_setopt($ch, CURLOPT_SSLKEY, $WxPayConfPub::$SSLKEY_PATH);
        //post提交方式
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        $data = curl_exec($ch);
        //返回结果
        if ($data) {
            curl_close($ch);
            return $data;
        } else {
            $error = curl_errno($ch);
            echo "curl出错，错误码:$error" . "<br>";
            echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
            curl_close($ch);
            return false;
        }
    }

    /**
     *    作用：打印数组
     */
    function printErr($wording = '', $err = '')
    {
        print_r('<pre>');
        echo $wording . "</br>";
        var_dump($err);
        print_r('</pre>');
    }
}

/**
 * 请求型接口的基类
 */
class WxpayClientPub extends CommonUtilPub
{
    var $parameters;//请求参数，类型为关联数组
    public $response;//微信返回的响应
    public $result;//返回参数，类型为关联数组
    var $url;//接口链接
    var $curl_timeout;//curl超时时间

    /**
     *    作用：设置请求参数
     */
    function setParameter($parameter, $parameterValue)
    {
        $this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
    }

    /**
     *    作用：设置标配的请求参数，生成签名，生成接口参数xml
     */
    function createXml()
    {
        $WxPayConfPub = new WxPayConfPub($this->project_id, $this->merchant_id);
        $this->parameters["appid"] = $WxPayConfPub::$APPID;//公众账号ID
        $this->parameters["mch_id"] = $WxPayConfPub::$MCHID;//商户号
        $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
        $this->parameters["sign"] = $this->getSign($this->parameters);//签名
        return $this->arrayToXml($this->parameters);
    }

    /**
     *    作用：post请求xml
     */
    function postXml()
    {
        $xml = $this->createXml();
        $this->response = $this->postXmlCurl($xml, $this->url, $this->curl_timeout);
        return $this->response;
    }

    /**
     *    作用：使用证书post请求xml
     */
    function postXmlSSL()
    {
        $xml = $this->createXml();
        $this->response = $this->postXmlSSLCurl($xml, $this->url, $this->curl_timeout);
        return $this->response;
    }

    /**
     *    作用：获取结果，默认不使用证书
     */
    function getResult()
    {
        $this->postXml();
        $this->result = $this->xmlToArray($this->response);
        return $this->result;
    }
}


/**
 * 统一支付接口类
 */
class UnifiedOrderPub extends WxpayClientPub
{
    public $project_id;
    public $merchant_id;

    function __construct($project_id, $merchant_id = null)
    {
        $this->project_id = $project_id;
        $this->merchant_id = $merchant_id;
        //设置接口链接
        $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
        //设置curl超时时间
        $this->curl_timeout = WxPayConfPub::CURL_TIMEOUT;

        parent::__construct($project_id, $merchant_id);
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        $WxPayConfPub = new WxPayConfPub($this->project_id, $this->merchant_id);
        try {
            //检测必填参数
            if ($this->parameters["out_trade_no"] == null) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数out_trade_no！" . "<br>");
            } elseif ($this->parameters["body"] == null) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数body！" . "<br>");
            } elseif ($this->parameters["total_fee"] == null) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数total_fee！" . "<br>");
            } elseif ($this->parameters["notify_url"] == null) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数notify_url！" . "<br>");
            } elseif ($this->parameters["trade_type"] == null) {
                throw new SDKRuntimeException("缺少统一支付接口必填参数trade_type！" . "<br>");
            } elseif ($this->parameters["trade_type"] == "JSAPI" &&
                $this->parameters["openid"] == NULL) {
                throw new SDKRuntimeException("统一支付接口中，缺少必填参数openid！trade_type为JSAPI时，openid为必填参数！" . "<br>");
            }
            $this->parameters["appid"] = $WxPayConfPub::$APPID;//公众账号ID
            $this->parameters["mch_id"] = $WxPayConfPub::$MCHID;//商户号
            $this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR'];//终端ip
            $this->parameters["nonce_str"] = $this->createNoncestr();//随机字符串
            $this->parameters["sign"] = $this->getSign($this->parameters);//签名
            return $this->arrayToXml($this->parameters);
        } catch (SDKRuntimeException $e) {
            die($e->errorMessage());
        }
    }

    /**
     * 获取prepay_id
     */
    function getPrepayId()
    {
        $this->postXml();
        $this->result = $this->xmlToArray($this->response);
        return isset($this->result["prepay_id"]) ? $this->result["prepay_id"] : null;
    }
}

/**
 * JSAPI支付——H5网页端调起支付接口
 */
class JsApiPub extends CommonUtilPub
{
    var $code;//code码，用以获取openid
    var $openid;//用户的openid
    var $parameters;//jsapi参数，格式为json
    var $prepay_id;//使用统一支付接口得到的预支付id
    var $curl_timeout;//curl超时时间

    function __construct($project_id, $merchant_id = null)
    {
        //设置curl超时时间
        $this->curl_timeout = WxPayConfPub::CURL_TIMEOUT;
        parent::__construct($project_id, $merchant_id);
    }

    /**
     *    作用：生成可以获得code的url
     */
    function createOauthUrlForCode($redirectUrl)
    {
        $WxPayConfPub = new WxPayConfPub($this->project_id, $this->merchant_id);
        $urlObj["appid"] = $WxPayConfPub::$APPID;
        $urlObj["redirect_uri"] = "$redirectUrl";
        $urlObj["response_type"] = "code";
        $urlObj["scope"] = "snsapi_base";
        $urlObj["state"] = "STATE" . "#wechat_redirect";
        $bizString = $this->formatBizQueryParaMap($urlObj, false);
        return "https://open.weixin.qq.com/connect/oauth2/authorize?" . $bizString;
    }

    /**
     *    作用：生成可以获得openid的url
     */
    function createOauthUrlForOpenid()
    {
        $WxPayConfPub = new WxPayConfPub($this->project_id, $this->merchant_id);
        $urlObj["appid"] = $WxPayConfPub::$APPID;
        $urlObj["secret"] = $WxPayConfPub::$APPSECRET;
        $urlObj["code"] = $this->code;
        $urlObj["grant_type"] = "authorization_code";
        $bizString = $this->formatBizQueryParaMap($urlObj, false);
        return "https://api.weixin.qq.com/sns/oauth2/access_token?" . $bizString;
    }


    /**
     *    作用：通过curl向微信提交code，以获取openid
     */
    function getOpenid()
    {
        $url = $this->createOauthUrlForOpenid();
        //初始化curl
        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, $this->curl_timeout);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_HEADER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //运行curl，结果以json形式返回
        $res = curl_exec($ch);
        curl_close($ch);
        //取出openid
        $data = json_decode($res, true);
        $this->openid = $data['openid'];
        return $this->openid;
    }

    /**
     *    作用：设置prepay_id
     */
    function setPrepayId($prepayId)
    {
        $this->prepay_id = $prepayId;
    }

    /**
     *    作用：设置code
     */
    function setCode($code_)
    {
        $this->code = $code_;
    }

    /**
     *    作用：设置jsapi的参数
     */
    public function getParameters()
    {
        $WxPayConfPub = new WxPayConfPub($this->project_id, $this->merchant_id);
        $jsApiObj["appId"] = $WxPayConfPub::$APPID;
        $timeStamp = time();
        $jsApiObj["timeStamp"] = "$timeStamp";
        $jsApiObj["nonceStr"] = $this->createNoncestr();
        $jsApiObj["package"] = "prepay_id=$this->prepay_id";
        $jsApiObj["signType"] = "MD5";
        $jsApiObj["paySign"] = $this->getSign($jsApiObj);
        $this->parameters = json_encode($jsApiObj);

        return $this->parameters;
    }
}

/**
 * 响应型接口基类
 */
class WxpayServerPub extends CommonUtilPub
{
    public $data;//接收到的数据，类型为关联数组
    var $returnParameters;//返回参数，类型为关联数组

    /**
     * 将微信的请求xml转换成关联数组，以方便数据处理
     */
    function saveData($xml)
    {
        $this->data = $this->xmlToArray($xml);
    }

    function checkSign()
    {
        $tmpData = $this->data;
        unset($tmpData['sign']);
        $sign = $this->getSign($tmpData);//本地签名
        if ($this->data['sign'] == $sign) {
            return TRUE;
        }
        return FALSE;
    }

    /**
     * 获取微信的请求数据
     */
    function getData()
    {
        return $this->data;
    }

    /**
     * 设置返回微信的xml数据
     */
    function setReturnParameter($parameter, $parameterValue)
    {
        $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
    }

    /**
     * 生成接口参数xml
     */
    function createXml()
    {
        return $this->arrayToXml($this->returnParameters);
    }

    /**
     * 将xml数据返回微信
     */
    function returnXml()
    {
        $returnXml = $this->createXml();
        return $returnXml;
    }
}


/**
 * 通用通知接口
 */
class NotifyPub extends WxpayServerPub
{

}

?>