<?php

/**
 * 
 * Phięn b?n: 0.1   
 * Tęn l?p: NL_CheckOut
 * Ch?c n?ng: Tích h?p thanh toán qua nganluong.vn cho các merchant site có ??ng ký API
 * - Xây d?ng URL chuy?n thông tin t?i Nganluong.vn ?? x? lý vi?c thanh toán cho merchant site.
 * - Xác th?c tính chính xác c?a thông tin ??n hŕng ???c g?i v? t? nganluong.vn.
 * 
 **/

require_once ( NV_ROOTDIR . "/includes/class/nusoap.php" );

class NL_Checkout
{

    // URL chheckout c?a nganluong.vn
    private $nganluong_url = '';

    private $merchant_site_code;

    private $secure_pass;

    function __construct ( $nganluong_url, $merchant_site_code, $secure_pass )
    {
        $this->nganluong_url = trim( $nganluong_url );
        $this->merchant_site_code = trim( $merchant_site_code );
        $this->secure_pass = trim( $secure_pass );
    }

    //Hŕm xây d?ng url, trong ?ó có tham s? mă hóa (cňn g?i lŕ public key)
    public function buildCheckoutUrl ( $return_url, $receiver, $transaction_info, $order_code, $price )
    {
        // M?ng các tham s? chuy?n t?i nganluong.vn
        $arr_param = array( 
            'merchant_site_code' => strval( $this->merchant_site_code ), 'return_url' => strtolower( urlencode( $return_url ) ), 'receiver' => strval( $receiver ), 'transaction_info' => strval( $transaction_info ), 'order_code' => strval( $order_code ), 'price' => strval( $price ) 
        );
        
        $secure_code = implode( ' ', $arr_param ) . ' ' . $this->secure_pass;
        $arr_param['secure_code'] = md5( $secure_code );
        /* B??c 2. Ki?m tra  bi?n $redirect_url xem có '?' không, n?u không có thě b? sung vŕo*/
        $redirect_url = $this->nganluong_url;
        if ( strpos( $redirect_url, '?' ) === false )
        {
            $redirect_url .= '?';
        }
        else if ( substr( $redirect_url, strlen( $redirect_url ) - 1, 1 ) != '?' && strpos( $redirect_url, '&' ) === false )
        {
            // N?u bi?n $redirect_url có '?' nh?ng không k?t thúc b?ng '?' vŕ có ch?a d?u '&' thě b? sung vŕo cu?i
            $redirect_url .= '&';
        }
        
        /* B??c 3. t?o url*/
        $url = '';
        foreach ( $arr_param as $key => $value )
        {
            if ( $url == '' ) $url .= $key . '=' . $value;
            else $url .= '&' . $key . '=' . $value;
        }
        
        return $redirect_url . $url;
    }

    /*Hŕm th?c hi?n xác minh tính ?úng ??n c?a các tham s? tr? v? t? nganluong.vn*/
    
    public function verifyPaymentUrl ( $transaction_info, $order_code, $price, $payment_id, $payment_type, $error_text, $secure_code )
    {
        // T?o mă xác th?c t? ch? web
        $str = '';
        $str .= ' ' . strval( $transaction_info );
        $str .= ' ' . strval( $order_code );
        $str .= ' ' . strval( $price );
        $str .= ' ' . strval( $payment_id );
        $str .= ' ' . strval( $payment_type );
        $str .= ' ' . strval( $error_text );
        $str .= ' ' . strval( $this->merchant_site_code );
        $str .= ' ' . strval( $this->secure_pass );
        
        // Mă hóa các tham s?
        $verify_secure_code = md5( $str );
        
        // Xác th?c mă c?a ch? web v?i mă tr? v? t? nganluong.vn
        if ( $verify_secure_code === $secure_code ) return true;
        
        return false;
    }

    public function checkOrder ( $public_api_url, $order_code, $payment_id )
    {
        $payment_id = ( empty( $payment_id ) ) ? "" : $payment_id;
        $param = "<ORDERS>
                	<TOTAL>1</TOTAL>
                	<ORDER>
                		<ORDER_CODE>" . $order_code . "</ORDER_CODE>
                		<PAYMENT_ID>" . $payment_id . "</PAYMENT_ID>		
                	</ORDER>
                </ORDERS>";
        
        $client = new nusoap_client( $public_api_url, 'wsdl' );
        $result = $client->call( 'checkOrder', array( 
            'merchant_id' => $this->merchant_site_code, 'param' => $param, 'checksum' => md5( $this->merchant_site_code . $param . $this->secure_pass ) 
        ) );
        if ( $xml = simplexml_load_string( $result ) )
        {
            $error_code = ( string )$xml->ERROR_CODE;
            if ( $error_code == "00" )
            {
                $transaction = $xml->xpath( 'TRANSACTION' );
                $data = array_map( "trim", ( array )$transaction[0] );
                if ( $data['TRANSACTION_ERROR_CODE'] == '00' )
                {
                    $preg_match_time = '/(\d{2}):(\d{2}):(\d{2}) - (\d{2})\/(\d{2})\/(\d{4})/';
                    
                    unset( $matches );
                    preg_match( $preg_match_time, $data['CREATED_TIME'], $matches );
                    $data['CREATED_TIME'] = mktime( $matches[1], $matches[2], $matches[3], $matches[5], $matches[4], $matches[6] );
                    
                    unset( $matches );
                    preg_match( $preg_match_time, $data['PAID_TIME'], $matches );
                    $data['PAID_TIME'] = mktime( $matches[1], $matches[2], $matches[3], $matches[5], $matches[4], $matches[6] );
                    
                    /* CHU?N HÓA CÁC TR?NG THÁI GIAO D?CH V? CÁC TR?NG THÁI SAU
							0 – Giao d?ch m?i t?o; 
							1 – Ch?a thanh toán; 
							2 – ?ă thanh toán, ?ang b? t?m gi?; 
							3 – Giao d?ch b? hu?; 
							4 – Giao d?ch ?ă hoŕn thŕnh thŕnh công (tr??ng h?p thanh toán ngay ho?c thanh toán t?m gi? nh?ng ng??i mua ?ă phę chu?n)
					     */
                    $data['nv_transaction_status'] = intval( $data['TRANSACTION_STATUS'] );
                    
                    return $data;
                }
            
            }
        }
        return false;
    }

    public function checkOrders ( $public_api_url, $array_order )
    {
        $data_orders_return = array();
        $param = "<ORDERS>
			<TOTAL>" . count( $array_order ) . "</TOTAL>";
        foreach ( $array_order as $arr_order_i )
        {
            $payment_id = ( empty( $arr_order_i['payment_id'] ) ) ? "" : $arr_order_i['payment_id'];
            $param .= "<ORDER>
                		<ORDER_CODE>" . $arr_order_i['order_code'] . "</ORDER_CODE>
                		<PAYMENT_ID>" . $payment_id . "</PAYMENT_ID>		
                	</ORDER>";
        }
        $param .= "</ORDERS>";
        
        $client = new nusoap_client( $public_api_url, 'wsdl' );
        $result = $client->call( 'checkOrder', array( 
            'merchant_id' => $this->merchant_site_code, 'param' => $param, 'checksum' => md5( $this->merchant_site_code . $param . $this->secure_pass ) 
        ) );
        
        if ( $xml = simplexml_load_string( $result ) )
        {
            $error_code = ( string )$xml->ERROR_CODE;
            if ( $error_code == "00" )
            {
                $transactions = $xml->xpath( 'TRANSACTION' );
                foreach ( $transactions as $transaction )
                {
                    $data = array_map( "trim", ( array )$transaction );
                    if ( $data['TRANSACTION_ERROR_CODE'] == '00' )
                    {
                        $preg_match_time = '/(\d{2}):(\d{2}):(\d{2}) - (\d{2})\/(\d{2})\/(\d{4})/';
                        
                        unset( $matches );
                        preg_match( $preg_match_time, $data['CREATED_TIME'], $matches );
                        $data['CREATED_TIME'] = mktime( $matches[1], $matches[2], $matches[3], $matches[5], $matches[4], $matches[6] );
                        
                        unset( $matches );
                        preg_match( $preg_match_time, $data['PAID_TIME'], $matches );
                        $data['PAID_TIME'] = mktime( $matches[1], $matches[2], $matches[3], $matches[5], $matches[4], $matches[6] );
                        
                        /* CHU?N HÓA CÁC TR?NG THÁI GIAO D?CH V? CÁC TR?NG THÁI SAU
							0 – Giao d?ch m?i t?o; 
							1 – Ch?a thanh toán; 
							2 – ?ă thanh toán, ?ang b? t?m gi?; 
							3 – Giao d?ch b? hu?; 
							4 – Giao d?ch ?ă hoŕn thŕnh thŕnh công (tr??ng h?p thanh toán ngay ho?c thanh toán t?m gi? nh?ng ng??i mua ?ă phę chu?n)
					     */
                        $data['nv_transaction_status'] = intval( $data['TRANSACTION_STATUS'] );
                        
                        $data_orders_return[] = $data;
                    }
                }
            }
        }
        return $data_orders_return;
    }
}
?>