xajax.class.php

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<?php
/**
 * xajax.inc.php :: Main xajax class and setup file
 *
 * xajax version 0.2.4
 * copyright (c) 2005 by Jared White & J. Max Wilson
 * http://www.xajaxproject.org
 */
if (!defined ('XAJAX_DEFAULT_CHAR_ENCODING'))
{
	define ('XAJAX_DEFAULT_CHAR_ENCODING', 'utf-8' );
}

####require_once(dirname(__FILE__)."/xajax_response.inc.php");


class xajaxResponse
{
	var $xml;
	var $sEncoding;
	var $bOutputEntities;

	function xajaxResponse($sEncoding=XAJAX_DEFAULT_CHAR_ENCODING, $bOutputEntities=false)
	{
		$this->setCharEncoding($sEncoding);
		$this->bOutputEntities = $bOutputEntities;
	}

	function setCharEncoding($sEncoding)
	{
		$this->sEncoding = $sEncoding;
	}

	function outputEntitiesOn()
	{
		$this->bOutputEntities = true;
	}

	function outputEntitiesOff()
	{
		$this->bOutputEntities = false;
	}

	function addConfirmCommands($iCmdNumber, $sMessage)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"cc","t"=>$iCmdNumber),$sMessage);
	}

	function addAssign($sTarget,$sAttribute,$sData)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"as","t"=>$sTarget,"p"=>$sAttribute),$sData);
	}

	function addAppend($sTarget,$sAttribute,$sData)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"ap","t"=>$sTarget,"p"=>$sAttribute),$sData);
	}

	function addPrepend($sTarget,$sAttribute,$sData)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"pp","t"=>$sTarget,"p"=>$sAttribute),$sData);
	}

	function addReplace($sTarget,$sAttribute,$sSearch,$sData)
	{
		$sDta = "<s><![CDATA[$sSearch]]></s><r><![CDATA[$sData]]></r>";
		$this->xml .= $this->_cmdXML(array("n"=>"rp","t"=>$sTarget,"p"=>$sAttribute),$sDta);
	}

	function addClear($sTarget,$sAttribute)
	{
		$this->addAssign($sTarget,$sAttribute,'');
	}

	function addAlert($sMsg)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"al"),$sMsg);
	}

	function addRedirect($sURL)
	{
		$queryStart = strpos($sURL, '?', strrpos($sURL, '/'));
		if ($queryStart !== FALSE)
		{
			$queryStart++;
			$queryEnd = strpos($sURL, '#', $queryStart);
			if ($queryEnd === FALSE)
				$queryEnd = strlen($sURL);
			$queryPart = substr($sURL, $queryStart, $queryEnd-$queryStart);
			parse_str($queryPart, $queryParts);
			$newQueryPart = "";
			foreach($queryParts as $key => $value)
			{
				$newQueryPart .= rawurlencode($key).'='.rawurlencode($value).ini_get('arg_separator.output');
			}
			$sURL = str_replace($queryPart, $newQueryPart, $sURL);
		}
		$this->addScript('window.location = "'.$sURL.'";');
	}

	function addScript($sJS)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"js"),$sJS);
	}

	function addScriptCall() {
		$arguments = func_get_args();
		$sFunc = array_shift($arguments);
		$sData = $this->_buildObjXml($arguments);
		$this->xml .= $this->_cmdXML(array("n"=>"jc","t"=>$sFunc),$sData);
	}

	function addRemove($sTarget)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"rm","t"=>$sTarget),'');
	}

	function addCreate($sParent, $sTag, $sId, $sType="")
	{
		if ($sType)
		{
			trigger_error("The \$sType parameter of addCreate has been deprecated.  Use the addCreateInput() method instead.", E_USER_WARNING);
			return;
		}
		$this->xml .= $this->_cmdXML(array("n"=>"ce","t"=>$sParent,"p"=>$sId),$sTag);
	}

	function addInsert($sBefore, $sTag, $sId)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"ie","t"=>$sBefore,"p"=>$sId),$sTag);
	}

	function addInsertAfter($sAfter, $sTag, $sId)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"ia","t"=>$sAfter,"p"=>$sId),$sTag);
	}

	function addCreateInput($sParent, $sType, $sName, $sId)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"ci","t"=>$sParent,"p"=>$sId,"c"=>$sType),$sName);
	}

	function addInsertInput($sBefore, $sType, $sName, $sId)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"ii","t"=>$sBefore,"p"=>$sId,"c"=>$sType),$sName);
	}

	function addInsertInputAfter($sAfter, $sType, $sName, $sId)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"iia","t"=>$sAfter,"p"=>$sId,"c"=>$sType),$sName);
	}

	function addEvent($sTarget,$sEvent,$sScript)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"ev","t"=>$sTarget,"p"=>$sEvent),$sScript);
	}

	function addHandler($sTarget,$sEvent,$sHandler)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"ah","t"=>$sTarget,"p"=>$sEvent),$sHandler);
	}

	function addRemoveHandler($sTarget,$sEvent,$sHandler)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"rh","t"=>$sTarget,"p"=>$sEvent),$sHandler);
	}

	function addIncludeScript($sFileName)
	{
		$this->xml .= $this->_cmdXML(array("n"=>"in"),$sFileName);
	}

	function getXML()
	{
		$sXML = "<?xml version=\"1.0\"";
		if ($this->sEncoding && strlen(trim($this->sEncoding)) > 0)
			$sXML .= " encoding=\"".$this->sEncoding."\"";
		$sXML .= " ?"."><xjx>" . $this->xml . "</xjx>";

		return $sXML;
	}

	function loadXML($mXML)
	{
		if (is_a($mXML, "xajaxResponse")) {
			$mXML = $mXML->getXML();
		}
		$sNewXML = "";
		$iStartPos = strpos($mXML, "<xjx>") + 5;
		$sNewXML = substr($mXML, $iStartPos);
		$iEndPos = strpos($sNewXML, "</xjx>");
		$sNewXML = substr($sNewXML, 0, $iEndPos);
		$this->xml .= $sNewXML;
	}

	function _cmdXML($aAttributes, $sData)
	{
		if ($this->bOutputEntities) {
			if (function_exists('mb_convert_encoding')) {
				$sData = call_user_func_array('mb_convert_encoding', array(&$sData, 'HTML-ENTITIES', $this->sEncoding));
			}
			else {
				trigger_error("The xajax XML response output could not be converted to HTML entities because the mb_convert_encoding function is not available", E_USER_NOTICE);
			}
		}
		$xml = "<cmd";
		foreach($aAttributes as $sAttribute => $sValue)
			$xml .= " $sAttribute=\"$sValue\"";
		if ($sData !== null && !stristr($sData,'<![CDATA['))
			$xml .= "><![CDATA[$sData]]></cmd>";
		else if ($sData !== null)
			$xml .= ">$sData</cmd>";
		else
			$xml .= "></cmd>";

		return $xml;
	}

	function _buildObjXml($var) {
		if (gettype($var) == "object") $var = get_object_vars($var);
		if (!is_array($var)) {
			return "<![CDATA[$var]]>";
		}
		else {
			$data = "<xjxobj>";
			foreach ($var as $key => $value) {
				$data .= "<e>";
				$data .= "<k>" . htmlspecialchars($key) . "</k>";
				$data .= "<v>" . $this->_buildObjXml($value) . "</v>";
				$data .= "</e>";
			}
			$data .= "</xjxobj>";
			return $data;
		}
	}

}




if (!defined ('XAJAX_GET'))
{
	define ('XAJAX_GET', 0);
}
if (!defined ('XAJAX_POST'))
{
	define ('XAJAX_POST', 1);
}

class xajax
{
	var $aFunctions;
	var $aObjects;
	var $aFunctionRequestTypes;
	var $aFunctionIncludeFiles;
	var $sCatchAllFunction;
	var $sPreFunction;
	var $sRequestURI;
	var $sWrapperPrefix;
	var $bDebug;
	var $bStatusMessages;
	var $bExitAllowed;
	var $bWaitCursor;
	var $bErrorHandler;
	var $sLogFile;
	var $bCleanBuffer;
	var $sEncoding;
	var $bDecodeUTF8Input;
	var $bOutputEntities;
	var $aObjArray;
	var $iPos;

	function xajax($sRequestURI="",$sWrapperPrefix="xajax_",$sEncoding=XAJAX_DEFAULT_CHAR_ENCODING,$bDebug=false)
	{
		$this->aFunctions = array();
		$this->aObjects = array();
		$this->aFunctionIncludeFiles = array();
		$this->sRequestURI = $sRequestURI;
		if ($this->sRequestURI == "")
			$this->sRequestURI = $this->_detectURI();
		$this->sWrapperPrefix = $sWrapperPrefix;
		$this->bDebug = $bDebug;
		$this->bStatusMessages = false;
		$this->bWaitCursor = true;
		$this->bExitAllowed = true;
		$this->bErrorHandler = false;
		$this->sLogFile = "";
		$this->bCleanBuffer = false;
		$this->setCharEncoding($sEncoding);
		$this->bDecodeUTF8Input = false;
		$this->bOutputEntities = false;
	}

	function setRequestURI($sRequestURI)
	{
		$this->sRequestURI = $sRequestURI;
	}

	function setWrapperPrefix($sPrefix)
	{
		$this->sWrapperPrefix = $sPrefix;
	}

	function debugOn()
	{
		$this->bDebug = true;
	}

	function debugOff()
	{
		$this->bDebug = false;
	}

	function statusMessagesOn()
	{
		$this->bStatusMessages = true;
	}

	function statusMessagesOff()
	{
		$this->bStatusMessages = false;
	}

	function waitCursorOn()
	{
		$this->bWaitCursor = true;
	}

	function waitCursorOff()
	{
		$this->bWaitCursor = false;
	}

	function exitAllowedOn()
	{
		$this->bExitAllowed = true;
	}

	function exitAllowedOff()
	{
		$this->bExitAllowed = false;
	}

	function errorHandlerOn()
	{
		$this->bErrorHandler = true;
	}

	function errorHandlerOff()
	{
		$this->bErrorHandler = false;
	}

	function setLogFile($sFilename)
	{
		$this->sLogFile = $sFilename;
	}

	function cleanBufferOn()
	{
		$this->bCleanBuffer = true;
	}

	function cleanBufferOff()
	{
		$this->bCleanBuffer = false;
	}

	function setCharEncoding($sEncoding)
	{
		$this->sEncoding = $sEncoding;
	}

	function decodeUTF8InputOn()
	{
		$this->bDecodeUTF8Input = true;
	}

	function decodeUTF8InputOff()
	{
		$this->bDecodeUTF8Input = false;
	}

	function outputEntitiesOn()
	{
		$this->bOutputEntities = true;
	}

	function outputEntitiesOff()
	{
		$this->bOutputEntities = false;
	}

	function registerFunction($mFunction,$sRequestType=XAJAX_POST)
	{
		if (is_array($mFunction)) {
			$this->aFunctions[$mFunction[0]] = 1;
			$this->aFunctionRequestTypes[$mFunction[0]] = $sRequestType;
			$this->aObjects[$mFunction[0]] = array_slice($mFunction, 1);
		}
		else {
			$this->aFunctions[$mFunction] = 1;
			$this->aFunctionRequestTypes[$mFunction] = $sRequestType;
		}
	}

	function registerExternalFunction($mFunction,$sIncludeFile,$sRequestType=XAJAX_POST)
	{
		$this->registerFunction($mFunction, $sRequestType);

		if (is_array($mFunction)) {
			$this->aFunctionIncludeFiles[$mFunction[0]] = $sIncludeFile;
		}
		else {
			$this->aFunctionIncludeFiles[$mFunction] = $sIncludeFile;
		}
	}

	function registerCatchAllFunction($mFunction)
	{
		if (is_array($mFunction)) {
			$this->sCatchAllFunction = $mFunction[0];
			$this->aObjects[$mFunction[0]] = array_slice($mFunction, 1);
		}
		else {
			$this->sCatchAllFunction = $mFunction;
		}
	}

	function registerPreFunction($mFunction)
	{
		if (is_array($mFunction)) {
			$this->sPreFunction = $mFunction[0];
			$this->aObjects[$mFunction[0]] = array_slice($mFunction, 1);
		}
		else {
			$this->sPreFunction = $mFunction;
		}
	}

	function canProcessRequests()
	{
		if ($this->getRequestMode() != -1) return true;
		return false;
	}

	function getRequestMode()
	{
		if (!empty($_GET["xajax"]))
			return XAJAX_GET;

		if (!empty($_POST["xajax"]))
			return XAJAX_POST;

		return -1;
	}

	function processRequests()
	{

		$requestMode = -1;
		$sFunctionName = "";
		$bFoundFunction = true;
		$bFunctionIsCatchAll = false;
		$sFunctionNameForSpecial = "";
		$aArgs = array();
		$sPreResponse = "";
		$bEndRequest = false;
		$sResponse = "";

		$requestMode = $this->getRequestMode();
		if ($requestMode == -1) return;

		if ($requestMode == XAJAX_POST)
		{
			$sFunctionName = $_POST["xajax"];

			if (!empty($_POST["xajaxargs"]))
				$aArgs = $_POST["xajaxargs"];
		}
		else
		{
			header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
			header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
			header ("Cache-Control: no-cache, must-revalidate");
			header ("Pragma: no-cache");

			$sFunctionName = $_GET["xajax"];

			if (!empty($_GET["xajaxargs"]))
				$aArgs = $_GET["xajaxargs"];
		}

		if ($this->bErrorHandler) {
			$GLOBALS['xajaxErrorHandlerText'] = "";
			set_error_handler("xajaxErrorHandler");
		}

		if ($this->sPreFunction) {
			if (!$this->_isFunctionCallable($this->sPreFunction)) {
				$bFoundFunction = false;
				$objResponse = new xajaxResponse();
				$objResponse->addAlert("Unknown Pre-Function ". $this->sPreFunction);
				$sResponse = $objResponse->getXML();
			}
		}
		if (array_key_exists($sFunctionName,$this->aFunctionIncludeFiles))
		{
			ob_start();
			include_once($this->aFunctionIncludeFiles[$sFunctionName]);
			ob_end_clean();
		}

		if ($bFoundFunction) {
			$sFunctionNameForSpecial = $sFunctionName;
			if (!array_key_exists($sFunctionName, $this->aFunctions))
			{
				if ($this->sCatchAllFunction) {
					$sFunctionName = $this->sCatchAllFunction;
					$bFunctionIsCatchAll = true;
				}
				else {
					$bFoundFunction = false;
					$objResponse = new xajaxResponse();
					$objResponse->addAlert("Unknown Function $sFunctionName.");
					$sResponse = $objResponse->getXML();
				}
			}
			else if ($this->aFunctionRequestTypes[$sFunctionName] != $requestMode)
			{
				$bFoundFunction = false;
				$objResponse = new xajaxResponse();
				$objResponse->addAlert("Incorrect Request Type.");
				$sResponse = $objResponse->getXML();
			}
		}

		if ($bFoundFunction)
		{
			for ($i = 0; $i < sizeof($aArgs); $i++)
			{
				if (get_magic_quotes_gpc() == 1 && is_string($aArgs[$i])) {

					$aArgs[$i] = stripslashes($aArgs[$i]);
				}
				if (stristr($aArgs[$i],"<xjxobj>") != false)
				{
					$aArgs[$i] = $this->_xmlToArray("xjxobj",$aArgs[$i]);
				}
				else if (stristr($aArgs[$i],"<xjxquery>") != false)
				{
					$aArgs[$i] = $this->_xmlToArray("xjxquery",$aArgs[$i]);
				}
				else if ($this->bDecodeUTF8Input)
				{
					$aArgs[$i] = $this->_decodeUTF8Data($aArgs[$i]);
				}
			}

			if ($this->sPreFunction) {
				$mPreResponse = $this->_callFunction($this->sPreFunction, array($sFunctionNameForSpecial, $aArgs));
				if (is_array($mPreResponse) && $mPreResponse[0] === false) {
					$bEndRequest = true;