<?php

namespace app\api\wxapi;

use app\api\wxapi\pay\WxPayConfig;

class AppPayWx {

	public $appid = '';  /*微信开放平台上的应用id*/
	
	public $mch_id = '';  /*微信申请成功之后邮件中的商户id*/
	
	public $api_key = '';  /*在微信商户平台上自己设定的api密钥 32位*/
	
	public $notify_url = ''; // 服务器异步通知页面路径(必填)

	public $out_trade_no = ''; // 商户订单号(必填，商户网站订单系统中唯一订单号)

	public $body = ''; // 商品描述(必填，不填则为商品名称)

	public $total_fee = 0; // 付款金额(必填)

	public $time_expire = ''; // 自定义超时(选填，支持dhmc)
	
	private $WxPayHelper;
	
	public function __construct(){
		$WxPayConfig = new WxPayConfig();
		$this->appid=$WxPayConfig->GetAppId();
		$this->mch_id=$WxPayConfig->GetMerchantId();
		$this->api_key=$WxPayConfig->GetKey();
	}
	
	public function Weixinpayandroid($total_fee, $tade_no) {
		$this->total_fee = intval ( $total_fee * 100 ); // 订单的金额 1元
		$this->out_trade_no = $tade_no; // date('YmdHis') . substr(time(), - 5) . substr(microtime(), 2, 5) . sprintf('%02d', rand(0, 99));//订单号
		$this->body = 'wx_pay_app'; // 支付描述信息
		$this->time_expire = date ( 'YmdHis', time () + 86400 ); // 订单支付的过期时间(eg:一天过期)
		
		$app_response = $this->doPay(); // 数据以JSON的形式返回给APP
		if (isset ( $app_response ['return_code'] ) && $app_response ['return_code'] == 'FAIL') {
			$errorCode = 100;
			$errorMsg = $app_response ['return_msg'];
			$this->echoResult ( $errorCode, $errorMsg );
		} else {
			$errorCode = 0;
			$errorMsg = 'success';
			$responseData = array (
					'notify_url' => $this->notify_url,
					'app_response' => $app_response 
			);
			$this->echoResult ( $errorCode, $errorMsg, $responseData );
		}
	}
	// 接口输出
	function echoResult($errorCode = 0, $errorMsg = 'success', $responseData = array()) {
		$arr = array (
				'errorCode' => $errorCode,
				'errorMsg' => $errorMsg,
				'responseData' => $responseData 
		);
		exit ( json_encode ( $arr ) ); // exit可以正常发送给APP json数据
			                         // return json_encode($arr); //在TP5中return这个json数据，APP接收到的是null,无法正常吊起微信支付
	}
	function getVerifySign($data, $key) {
		$String = $this->formatParameters ( $data, false );
		// 签名步骤二：在string后加入KEY
		$String = $String . "&key=" . $key;
		// 签名步骤三：MD5加密
		$String = md5 ( $String );
		// 签名步骤四：所有字符转为大写
		$result = strtoupper ( $String );
		return $result;
	}
	function formatParameters($paraMap, $urlencode) {
		$buff = "";
		ksort ( $paraMap );
		foreach ( $paraMap as $k => $v ) {
			if ($k == "sign") {
				continue;
			}
			if ($urlencode) {
				$v = urlencode ( $v );
			}
			$buff .= $k . "=" . $v . "&";
		}
		$reqPar;
		if (strlen ( $buff ) > 0) {
			$reqPar = substr ( $buff, 0, strlen ( $buff ) - 1 );
		}
		return $reqPar;
	}
	/**
	 * 得到签名
	 * 
	 * @param object $obj        	
	 * @param string $api_key        	
	 * @return string
	 */
	function getSign($obj, $api_key) {
		foreach ( $obj as $k => $v ) {
			$Parameters [strtolower ( $k )] = $v;
		}
		// 签名步骤一：按字典序排序参数
		ksort ( $Parameters );
		$String = $this->formatBizQueryParaMap ( $Parameters, false );
		// 签名步骤二：在string后加入KEY
		$String = $String . "&key=" . $api_key;
		// 签名步骤三：MD5加密
		$result = strtoupper ( md5 ( $String ) );
		return $result;
	}
	/**
	 * 获取指定长度的随机字符串
	 * 
	 * @param int $length        	
	 * @return Ambigous <NULL, string>
	 */
	function getRandChar($length) {
		$str = null;
		$strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
		$max = strlen ( $strPol ) - 1;
		for($i = 0; $i < $length; $i ++) {
			$str .= $strPol [rand ( 0, $max )]; // rand($min,$max)生成介于min和max两个数之间的一个随机整数
		}
		return $str;
	}
	/**
	 * 数组转xml
	 * 
	 * @param array $arr        	
	 * @return string
	 */
	function arrayToXml($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;
	}
	/**
	 * 以post方式提交xml到对应的接口url
	 *
	 * @param string $xml
	 *        	需要post的xml数据
	 * @param string $url
	 *        	url
	 * @param bool $useCert
	 *        	是否需要证书，默认不需要
	 * @param int $second
	 *        	url执行超时时间，默认30s
	 * @throws WxPayException
	 */
	function postXmlCurl($xml, $url, $second = 30, $useCert = false, $sslcert_path = '', $sslkey_path = '') {
		$ch = curl_init ();
		// 设置超时
		curl_setopt ( $ch, CURLOPT_TIMEOUT, $second );
		curl_setopt ( $ch, CURLOPT_URL, $url );
		// 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 );
		curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, FALSE );
		curl_setopt ( $ch, CURLOPT_SSL_VERIFYHOST, FALSE );
		if ($useCert == true) {
			curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, TRUE );
			curl_setopt ( $ch, CURLOPT_SSL_VERIFYHOST, 2 ); // 严格校验
			                                           // 设置证书
			                                           // 使用证书：cert 与 key 分别属于两个.pem文件
			curl_setopt ( $ch, CURLOPT_SSLCERTTYPE, 'PEM' );
			curl_setopt ( $ch, CURLOPT_SSLCERT, $sslcert_path );
			curl_setopt ( $ch, CURLOPT_SSLKEYTYPE, 'PEM' );
			curl_setopt ( $ch, CURLOPT_SSLKEY, $sslkey_path );
		}
		// 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 );
			curl_close ( $ch );
			return false;
		}
	}
	/**
	 * 获取当前服务器的IP
	 * 
	 * @return Ambigous <string, unknown>
	 */
	function get_client_ip() {
		if (isset ( $_SERVER ['REMOTE_ADDR'] )) {
			$cip = $_SERVER ['REMOTE_ADDR'];
		} elseif (getenv ( "REMOTE_ADDR" )) {
			$cip = getenv ( "REMOTE_ADDR" );
		} elseif (getenv ( "HTTP_CLIENT_IP" )) {
			$cip = getenv ( "HTTP_CLIENT_IP" );
		} else {
			$cip = "127.0.0.1";
		}
		return $cip;
	}
	/**
	 * 将数组转成uri字符串
	 * 
	 * @param array $paraMap        	
	 * @param bool $urlencode        	
	 * @return string
	 */
	function formatBizQueryParaMap($paraMap, $urlencode) {
		$buff = "";
		ksort ( $paraMap );
		foreach ( $paraMap as $k => $v ) {
			if ($urlencode) {
				$v = urlencode ( $v );
			}
			$buff .= strtolower ( $k ) . "=" . $v . "&";
		}
		$reqPar;
		if (strlen ( $buff ) > 0) {
			$reqPar = substr ( $buff, 0, strlen ( $buff ) - 1 );
		}
		return $reqPar;
	}
	/**
	 * XML转数组
	 * 
	 * @param unknown $xml        	
	 * @return mixed
	 */
	function xmlToArray($xml) {
		// 将XML转为array
		$array_data = json_decode ( json_encode ( simplexml_load_string ( $xml, 'SimpleXMLElement', LIBXML_NOCDATA ) ), true );
		return $array_data;
	}
	public function chkParam() {
		// 用户网站订单号
		if (empty ( $this->out_trade_no )) {
			die ( 'out_trade_no error' );
		}
		// 商品描述
		if (empty ( $this->body )) {
			die ( 'body error' );
		}
		if (empty ( $this->time_expire )) {
			die ( 'time_expire error' );
		}
		// 检测支付金额
		if (empty ( $this->total_fee ) || ! is_numeric ( $this->total_fee )) {
			die ( 'total_fee error' );
		}
		// 异步通知URL
		if (empty ( $this->notify_url )) {
			die ( 'notify_url error' );
		}
		if (! preg_match ( "#^http:\/\/#i", $this->notify_url )) {
			$this->notify_url = "http://" . $_SERVER ['HTTP_HOST'] . $this->notify_url;
		}
		return true;
	}
	/**
	 * 生成支付(返回给APP)
	 * 
	 * @return boolean|mixed
	 */
	public function doPay() {
		// 检测构造参数
		$this->chkParam ();
		return $this->createAppPara ();
	}
	/**
	 * APP统一下单
	 */
	private function createAppPara() {
		$url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
		$data ["appid"] = $this->appid; // 微信开放平台审核通过的应用APPID
		$data ["body"] = $this->body; // 商品或支付单简要描述
		$data ["mch_id"] = $this->mch_id; // 商户号
		$data ["nonce_str"] = $this->getRandChar ( 32 ); // 随机字符串
		$data ["notify_url"] = $this->notify_url; // 通知地址
		$data ["out_trade_no"] = $this->out_trade_no; // 商户订单号
		$data ["spbill_create_ip"] = $this->get_client_ip (); // 终端IP
		$data ["total_fee"] = $this->total_fee; // 总金额
		$data ["time_expire"] = $this->time_expire; // 交易结束时间
		$data ["trade_type"] = "APP"; // 交易类型
		$data ["sign"] = $this->getSign ( $data, $this->api_key); // 签名
		$xml = $this->arrayToXml ( $data );
		$response = $this->postXmlCurl ( $xml, $url );
		// 将微信返回的结果xml转成数组
		$responseArr = $this->xmlToArray ( $response );
		if (isset ( $responseArr ["return_code"] ) && $responseArr ["return_code"] == 'SUCCESS') {
			return $this->getOrder ( $responseArr ['prepay_id'] );
		}
		return $responseArr;
	}
	/**
	 * 执行第二次签名，才能返回给客户端使用
	 * 
	 * @param int $prepayId:预支付交易会话标识        	
	 * @return array
	 */
	public function getOrder($prepayId) {
		$data ["appid"] = $this->appid;
		$data ["noncestr"] = $this->getRandChar ( 32 );
		$data ["package"] = "Sign=WXPay";
		$data ["partnerid"] = $this->mch_id;
		$data ["prepayid"] = $prepayId;
		$data ["timestamp"] = time ();
		$data ["sign"] = $this->getSign ( $data, $this->api_key);
		$data ["packagestr"] = "Sign=WXPay";
		return $data;
	}
	/**
	 * 异步通知信息验证
	 * 
	 * @return boolean|mixed
	 */
	public function verifyNotify() {
		$xml = isset ( $GLOBALS ['HTTP_RAW_POST_DATA'] ) ? $GLOBALS ['HTTP_RAW_POST_DATA'] : '';
		if (! $xml) {
			return false;
		}
		$wx_back = $this->xmlToArray ( $xml );
		if (empty ( $wx_back )) {
			return false;
		}
		$checkSign = $this->getVerifySign ( $wx_back, $this->api_key);
		if ($checkSign = $wx_back ['sign']) {
			return $wx_back;
		} else {
			return false;
		}
	}
}

?>