<?php
/**
 * @name WxPayController
 * @author pangee
 * @desc 微信支付功能封装
 */

$qrcodeLibPath = dirname(__FILE__).‘/../library/ThirdParty/Qrcode/‘;
include_once( $qrcodeLibPath.‘Qrcode.php‘ );

class WxpayController extends Yaf_Controller_Abstract {

	public function indexAction() {
	}
	public function createbillAction() {
		$itemid = $this->getRequest()->getQuery( "itemid", "" );
		if( !$itemid ) {
			echo json_encode( array("errno"=>-6001, "errmsg"=>"请传递正确的商品ID") );
			return FALSE;
		}

		/**
		 * 检查是否登录
		 */
		session_start();
		if( !isset($_SESSION[‘user_token_time‘]) || !isset($_SESSION[‘user_token‘]) || !isset($_SESSION[‘user_id‘])
			|| md5( "salt".$_SESSION[‘user_token_time‘].$_SESSION[‘user_id‘] ) != $_SESSION[‘user_token‘] ) {
			echo json_encode( array("errno"=>-6002, "errmsg"=>"请先登录后操作") );
			return FALSE;
		}

		// 调用Model
		$model = new WxpayModel();
		if ( $data=$model->createbill( $itemid, $_SESSION[‘user_id‘] ) ) {
			echo json_encode( array(
						"errno"=>0,
						"errmsg"=>"",
						"data" => $data,
					));
		} else {
			echo json_encode( array(
						"errno"=>$model->errno,
						"errmsg"=>$model->errmsg,
					));
		}
		return TRUE;
	}
	/**
	 * 正常情况下返回二维码
	 */
	public function qrcodeAction() {
		$billId = $this->getRequest()->getQuery( "billid", false );
		if( !$billId ) {
			echo json_encode( array("errno"=>-6008, "errmsg"=>"账单ID必须传递") );
			return FALSE;
		}

		// 调用Model
		$model = new WxpayModel();
		if ( $data=$model->qrcode( $billId ) ) {
			/**
			 * 输出二维码
			 */
			QRcode::png($data);
		} else {
			echo json_encode( array(
						"errno"=>$model->errno,
						"errmsg"=>$model->errmsg,
					));
		}
		return TRUE;
	}
	public function callbackAction(){
		$model = new WxpayModel();
		$model->callback();
		echo json_encode( array(
						"errno"=>0,
						"errmsg"=>"",
					));
		return TRUE;
	}
}

<?php
/**
 * @name WxpayModel
 * @desc 微信支付功能封装
 * @author pangee
 */
$wxpayLibPath = dirname(__FILE__).‘/../library/ThirdParty/WxPay/‘;
include_once( $wxpayLibPath.‘WxPay.Api.php‘ );
include_once( $wxpayLibPath.‘WxPay.Notify.php‘ );
include_once( $wxpayLibPath.‘WxPay.NativePay.php‘ );
include_once( $wxpayLibPath.‘WxPay.Data.php‘ );

class WxpayModel extends WxPayNotify {
	public $errno = 0;
	public $errmsg = "";
	private $_db;

    public function __construct() {
		$this->_db = new PDO("mysql:host=127.0.0.1;dbname=test;", "root", "123456");
    }   

	public function createbill( $itemId, $uid ){
		$query = $this->_db->prepare("select * from `item` where `id`= ? ");
		$query->execute( array($itemId) );
		$ret = $query->fetchAll();
		if( !$ret || count($ret)!=1 ) {
			$this->errno = -6003;
			$this->errmsg = "找不到这件商品";
			return false;
		}
		$item = $ret[0];
		if( strtotime($item[‘etime‘]) <= time() ) {
			$this->errno = -6004;
			$this->errmsg = "商品已过期，不能购买";
			return false;
		}
		if( intval($item[‘stock‘])<=0 ) {
			$this->errno = -6005;
			$this->errmsg = "商品库存不够，不能购买";
			return false;
		}
		/**
		 * 创建bill
		 */
		$query = $this->_db->prepare("insert into `bill` (`itemid`,`uid`,`price`,`status`) VALUES ( ?, ?, ?, ‘unpaid‘) ");
		$ret = $query->execute( array( $itemId, $uid, intval($item[‘price‘]) ) );
		if ( !$ret ) {
			$this->errno = -6006;
			$this->errmsg = "创建账单失败";
			return false;
		}

		/**
		 * 成功创建账单后，需要扣去商品库存1件
		 * TODO 此处应用用事务
		 */
		$query = $this->_db->prepare("update `item` set `stock`=`stock`-1 where `id`= ? ");
		$ret = $query->execute( array( $itemId ) );
		if ( !$ret ) {
			$this->errno = -6007;
			$this->errmsg = "更新库存失败";
			return false;
		}
		
		return intval($this->_db->lastInsertId());
	}


	public function qrcode( $billId ){
		$query = $this->_db->prepare("select * from `bill` where `id`= ? ");
		$query->execute( array($billId) );
		$ret = $query->fetchAll();
		if( !$ret || count($ret)!=1 ) {
			$this->errno = -6009;
			$this->errmsg = "找不到账单信息";
			return false;
		}
		$bill = $ret[0];
		
		$query = $this->_db->prepare("select * from `item` where `id`= ? ");
		$query->execute( array($bill[‘itemid‘]) );
		$ret = $query->fetchAll();
		if( !$ret || count($ret)!=1 ) {
			$this->errno = -6010;
			$this->errmsg = "找不到商品信息";
			return false;
		}
		$item = $ret[0];

		/**
		 * 调用微信支付lib，生成账单二维码
		 */
		$input = new WxPayUnifiedOrder();
		$input->SetBody( $item[‘name‘] );
		$input->SetAttach( $billId );
		$input->SetOut_trade_no(WxPayConfig::MCHID.date("YmdHis"));
		$input->SetTotal_fee( $bill[‘price‘] );
		$input->SetTime_start(date("YmdHis"));
		$input->SetTime_expire(date("YmdHis", time()+86400*3));
		$input->SetGoods_tag( $item[‘name‘] );
		$input->SetNotify_url("http://103.72.145.223:8889/?c=wxpay&a=callback");//回调函数
		$input->SetTrade_type("NATIVE");
		$input->SetProduct_id( $billId );

		$notify = new NativePay();
		$result = $notify->GetPayUrl($input);
		$url = $result["code_url"];
		return $url;
	}

	public function callback(){
		/**
		 * 订单成功，更新账单
		 * TODO 因为SK没有，没法与微信支付的服务端做Response确认，只能单方面记账
		 */
		$xmlData = file_get_contents("php://input");
		if( substr_count( $xmlData, "<result_code><![CDATA[SUCCESS]]></result_code>" )==1 && 
			substr_count( $xmlData, "<return_code><![CDATA[SUCCESS]]></return_code>" )==1 )
		{
			preg_match( ‘/<attach>(.*)\[(\d+)\](.*)<\/attach>/i‘, $xmlData, $match );
			if( isset($match[2])&&is_numeric($match[2]) ) {
				$billId = intval( $match[2] );
			}
			preg_match( ‘/<transaction_id>(.*)\[(\d+)\](.*)<\/transaction_id>/i‘, $xmlData, $match );
			if( isset($match[2])&&is_numeric($match[2]) ) {
				$transactionId = intval( $match[2] );
			}
		}
		if( isset($billId) && isset($transactionId) ) {
			$query = $this->_db->prepare("update `bill` set `transaction`=? ,`ptime`=? ,`status`=‘paid‘ where `id`=? ");
			$query->execute( array( $transactionId, date("Y-m-d H:i:s"), $billId ) );
		}
	}
}