<?php
/**
 * ������
 * ============================================================================
 * api˵����
 * init(),��ʼ������Ĭ�ϸ�һЩ����ֵ����cmdno,date�ȡ�
 * getGateURL()/setGateURL(),��ȡ/������ڵ�ַ,�������ֵ
 * getKey()/setKey(),��ȡ/������Կ
 * getParameter()/setParameter(),��ȡ/���ò���ֵ
 * getAllParameters(),��ȡ���в���
 * getRequestURL(),��ȡ����������URL
 * doSend(),�ض��򵽲Ƹ�֧ͨ��
 * getDebugInfo(),��ȡdebug��Ϣ
 *
 * ============================================================================
 *
 */
class RequestHandler
{

    /** ���url��ַ */
    var $gateUrl;

    /** ��Կ */
    var $key;

    /** ����Ĳ��� */
    var $parameters;

    /** debug��Ϣ */
    var $debugInfo;

    function __construct()
    {
        $this->RequestHandler();
    }

    function RequestHandler()
    {
        $this->gateUrl    = "https://www.tenpay.com/cgi-bin/v1.0/service_gate.cgi";
        $this->key        = "";
        $this->parameters = array();
        $this->debugInfo  = "";
    }

    /**
     *��ʼ������
     */
    function init()
    {
        //nothing to do
    }

    /**
     *��ȡ��ڵ�ַ,�������ֵ
     */
    function getGateURL()
    {
        return $this->gateUrl;
    }

    /**
     *������ڵ�ַ,�������ֵ
     */
    function setGateURL($gateUrl)
    {
        $this->gateUrl = $gateUrl;
    }

    /**
     *��ȡ��Կ
     */
    function getKey()
    {
        return $this->key;
    }

    /**
     *������Կ
     */
    function setKey($key)
    {
        $this->key = $key;
    }

    /**
     *��ȡ����ֵ
     */
    function getParameter($parameter)
    {
        return $this->parameters[$parameter];
    }

    /**
     *���ò���ֵ
     */
    function setParameter($parameter, $parameterValue)
    {
        $this->parameters[$parameter] = $parameterValue;
    }

    /**
     *��ȡ��������Ĳ���
     * @return array
     */
    function getAllParameters()
    {
        return $this->parameters;
    }

    /**
     *��ȡ����������URL
     */
    function getRequestURL()
    {
        $this->createSign();
        $reqPar = "";
        ksort($this->parameters);
        foreach ($this->parameters as $k => $v) {
            $reqPar .= $k . "=" . urlencode($v) . "&";
        }
        //ȥ�����һ��&
        $reqPar     = substr($reqPar, 0, strlen($reqPar) - 1);
        $requestURL = $this->getGateURL() . "?" . $reqPar;
        return $requestURL;
    }

    /**
     *��ȡdebug��Ϣ
     */
    function getDebugInfo()
    {
        return $this->debugInfo;
    }

    /**
     *�ض��򵽲Ƹ�֧ͨ��
     */
    function doSend()
    {
        header("Location:" . $this->getRequestURL());
        exit;
    }

    /**
     *����md5ժҪ,������:���������a-z����,������ֵ�Ĳ���μ�ǩ��
     */
    function createSign()
    {
        $signPars = "";
        ksort($this->parameters);
        foreach ($this->parameters as $k => $v) {
            if ("" != $v && "sign" != $k) {
                $signPars .= $k . "=" . $v . "&";
            }
        }
        $signPars .= "key=" . $this->getKey();
        $sign = strtolower(md5($signPars));
        $this->setParameter("sign", $sign);
        //debug��Ϣ
        $this->_setDebugInfo($signPars . " => sign:" . $sign);
    }

    /**
     *����debug��Ϣ
     */
    function _setDebugInfo($debugInfo)
    {
        $this->debugInfo = $debugInfo;
    }
}