xajax.inc.php

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	 * @param string an optional argument containing the full server file path
	 *               of xajax.js.
	 */
	function autoCompressJavascript($sJsFullFilename=NULL)
	{	
		$sJsFile = "xajax_js/xajax.js";
		
		if ($sJsFullFilename) {
			$realJsFile = $sJsFullFilename;
		}
		else {
			$realPath = realpath(dirname(__FILE__));
			$realJsFile = $realPath . "/". $sJsFile;
		}

		// Create a compressed file if necessary
		if (!file_exists($realJsFile)) {
			$srcFile = str_replace(".js", "_uncompressed.js", $realJsFile);
			if (!file_exists($srcFile)) {
				trigger_error("The xajax uncompressed Javascript file could not be found in the <b>" . dirname($realJsFile) . "</b> folder. Error ", E_USER_ERROR);	
			}
			require(dirname(__FILE__)."/xajaxCompress.php");
			$javaScript = implode('', file($srcFile));
			$compressedScript = xajaxCompressJavascript($javaScript);
			$fH = @fopen($realJsFile, "w");
			if (!$fH) {
				trigger_error("The xajax compressed javascript file could not be written in the <b>" . dirname($realJsFile) . "</b> folder. Error ", E_USER_ERROR);
			}
			else {
				fwrite($fH, $compressedScript);
				fclose($fH);
			}
		}
	}
	
	/**
	 * Returns the current URL based upon the SERVER vars.
	 * 
	 * @access private
	 * @return string
	 */
	function _detectURI() {
		$aURL = array();

		// Try to get the request URL
		if (!empty($_SERVER['REQUEST_URI'])) {
			$aURL = parse_url($_SERVER['REQUEST_URI']);
		}

		// Fill in the empty values
		if (empty($aURL['scheme'])) {
			if (!empty($_SERVER['HTTP_SCHEME'])) {
				$aURL['scheme'] = $_SERVER['HTTP_SCHEME'];
			} else {
				$aURL['scheme'] = (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') ? 'https' : 'http';
			}
		}

		if (empty($aURL['host'])) {
			if (!empty($_SERVER['HTTP_HOST'])) {
				if (strpos($_SERVER['HTTP_HOST'], ':') > 0) {
					list($aURL['host'], $aURL['port']) = explode(':', $_SERVER['HTTP_HOST']);
				} else {
					$aURL['host'] = $_SERVER['HTTP_HOST'];
				}
			} else if (!empty($_SERVER['SERVER_NAME'])) {
				$aURL['host'] = $_SERVER['SERVER_NAME'];
			} else {
				print "xajax Error: xajax failed to automatically identify your Request URI.";
				print "Please set the Request URI explicitly when you instantiate the xajax object.";
				exit();
			}
		}

		if (empty($aURL['port']) && !empty($_SERVER['SERVER_PORT'])) {
			$aURL['port'] = $_SERVER['SERVER_PORT'];
		}

		if (empty($aURL['path'])) {
			if (!empty($_SERVER['PATH_INFO'])) {
				$sPath = parse_url($_SERVER['PATH_INFO']);
			} else {
				$sPath = parse_url(api_get_self());
			}
			$aURL['path'] = $sPath['path'];
			unset($sPath);
		}

		if (!empty($aURL['query'])) {
			$aURL['query'] = '?'.$aURL['query'];
		}

		// Build the URL: Start with scheme, user and pass
		$sURL = $aURL['scheme'].'://';
		if (!empty($aURL['user'])) {
			$sURL.= $aURL['user'];
			if (!empty($aURL['pass'])) {
				$sURL.= ':'.$aURL['pass'];
			}
			$sURL.= '@';
		}

		// Add the host
		$sURL.= $aURL['host'];

		// Add the port if needed
		if (!empty($aURL['port']) && (($aURL['scheme'] == 'http' && $aURL['port'] != 80) || ($aURL['scheme'] == 'https' && $aURL['port'] != 443))) {
			$sURL.= ':'.$aURL['port'];
		}

		// Add the path and the query string
		$sURL.= $aURL['path'].@$aURL['query'];

		// Clean up
		unset($aURL);
		return $sURL;
	}
	
	/**
	 * Returns true if the function name is associated with an object callback,
	 * false if not.
	 * 
	 * @param string the name of the function
	 * @access private
	 * @return boolean
	 */
	function _isObjectCallback($sFunction)
	{
		if (array_key_exists($sFunction, $this->aObjects)) return true;
		return false;
	}
	
	/**
	 * Returns true if the function or object callback can be called, false if
	 * not.
	 * 
	 * @param string the name of the function
	 * @access private
	 * @return boolean
	 */
	function _isFunctionCallable($sFunction)
	{
		if ($this->_isObjectCallback($sFunction)) {
			if (is_object($this->aObjects[$sFunction][0])) {
				return method_exists($this->aObjects[$sFunction][0], $this->aObjects[$sFunction][1]);
			}
			else {
				return is_callable($this->aObjects[$sFunction]);
			}
		}
		else {
			return function_exists($sFunction);
		}	
	}
	
	/**
	 * Calls the function, class method, or object method with the supplied
	 * arguments.
	 * 
	 * @param string the name of the function
	 * @param array  arguments to pass to the function
	 * @access private
	 * @return mixed the output of the called function or method
	 */
	function _callFunction($sFunction, $aArgs)
	{
		if ($this->_isObjectCallback($sFunction)) {
			$mReturn = call_user_func_array($this->aObjects[$sFunction], $aArgs);
		}
		else {
			$mReturn = call_user_func_array($sFunction, $aArgs);
		}
		return $mReturn;
	}
	
	/**
	 * Generates the Javascript wrapper for the specified PHP function.
	 * 
	 * @param string the name of the function
	 * @param mixed  the request type
	 * @access private
	 * @return string
	 */
	function _wrap($sFunction,$sRequestType=XAJAX_POST)
	{
		$js = "function ".$this->sWrapperPrefix."$sFunction(){return xajax.call(\"$sFunction\", arguments, ".$sRequestType.");}\n";		
		return $js;
	}

	/**
	 * Takes a string containing xajax xjxobj XML or xjxquery XML and builds an
	 * array representation of it to pass as an argument to the PHP function
	 * being called.
	 * 
	 * @param string the root tag of the XML
	 * @param string XML to convert
	 * @access private
	 * @return array
	 */
	function _xmlToArray($rootTag, $sXml)
	{
		$aArray = array();
		$sXml = str_replace("<$rootTag>","<$rootTag>|~|",$sXml);
		$sXml = str_replace("</$rootTag>","</$rootTag>|~|",$sXml);
		$sXml = str_replace("<e>","<e>|~|",$sXml);
		$sXml = str_replace("</e>","</e>|~|",$sXml);
		$sXml = str_replace("<k>","<k>|~|",$sXml);
		$sXml = str_replace("</k>","|~|</k>|~|",$sXml);
		$sXml = str_replace("<v>","<v>|~|",$sXml);
		$sXml = str_replace("</v>","|~|</v>|~|",$sXml);
		$sXml = str_replace("<q>","<q>|~|",$sXml);
		$sXml = str_replace("</q>","|~|</q>|~|",$sXml);
		
		$this->aObjArray = explode("|~|",$sXml);
		
		$this->iPos = 0;
		$aArray = $this->_parseObjXml($rootTag);
        
		return $aArray;
	}
	
	/**
	 * A recursive function that generates an array from the contents of
	 * $this->aObjArray.
	 * 
	 * @param string the root tag of the XML
	 * @access private
	 * @return array
	 */
	function _parseObjXml($rootTag)
	{
		$aArray = array();
		
		if ($rootTag == "xjxobj")
		{
			while(!stristr($this->aObjArray[$this->iPos],"</xjxobj>"))
			{
				$this->iPos++;
				if(stristr($this->aObjArray[$this->iPos],"<e>"))
				{
					$key = "";
					$value = null;
						
					$this->iPos++;
					while(!stristr($this->aObjArray[$this->iPos],"</e>"))
					{
						if(stristr($this->aObjArray[$this->iPos],"<k>"))
						{
							$this->iPos++;
							while(!stristr($this->aObjArray[$this->iPos],"</k>"))
							{
								$key .= $this->aObjArray[$this->iPos];
								$this->iPos++;
							}
						}
						if(stristr($this->aObjArray[$this->iPos],"<v>"))
						{
							$this->iPos++;
							while(!stristr($this->aObjArray[$this->iPos],"</v>"))
							{
								if(stristr($this->aObjArray[$this->iPos],"<xjxobj>"))
								{
									$value = $this->_parseObjXml("xjxobj");
									$this->iPos++;
								}
								else
								{
									$value .= $this->aObjArray[$this->iPos];
									if ($this->bDecodeUTF8Input)
									{
										$value = $this->_decodeUTF8Data($value);
									}
								}
								$this->iPos++;
							}
						}
						$this->iPos++;
					}
					
					$aArray[$key]=$value;
				}
			}
		}
		
		if ($rootTag == "xjxquery")
		{
			$sQuery = "";
			$this->iPos++;
			while(!stristr($this->aObjArray[$this->iPos],"</xjxquery>"))
			{
				if (stristr($this->aObjArray[$this->iPos],"<q>") || stristr($this->aObjArray[$this->iPos],"</q>"))
				{
					$this->iPos++;
					continue;
				}
				$sQuery	.= $this->aObjArray[$this->iPos];
				$this->iPos++;
			}
			
			parse_str($sQuery, $aArray);
			if ($this->bDecodeUTF8Input)
			{
				foreach($aArray as $key => $value)
				{
					$aArray[$key] = $this->_decodeUTF8Data($value);
				}
			}
			// If magic quotes is on, then we need to strip the slashes from the
			// array values because of the parse_str pass which adds slashes
			if (get_magic_quotes_gpc() == 1) {
				$newArray = array();
				foreach ($aArray as $sKey => $sValue) {
					if (is_string($sValue))
						$newArray[$sKey] = stripslashes($sValue);
					else
						$newArray[$sKey] = $sValue;
				}
				$aArray = $newArray;
			}
		}
		
		return $aArray;
	}
	
	/**
	 * Decodes string data from UTF-8 to the current xajax encoding.
	 * 
	 * @param string data to convert
	 * @access private
	 * @return string converted data
	 */
	function _decodeUTF8Data($sData)
	{
		$sValue = $sData;
		if ($this->bDecodeUTF8Input)
		{
			$sFuncToUse = NULL;
			
			if (function_exists('iconv'))
			{
				$sFuncToUse = "iconv";
			}
			else if (function_exists('mb_convert_encoding'))
			{
				$sFuncToUse = "mb_convert_encoding";
			}
			else if ($this->sEncoding == "ISO-8859-1")
			{
				$sFuncToUse = "utf8_decode";
			}
			else
			{
				trigger_error("The incoming xajax data could not be converted from UTF-8", E_USER_NOTICE);
			}
			
			if ($sFuncToUse)
			{
				if (is_string($sValue))
				{
					if ($sFuncToUse == "iconv")
					{
						$sValue = iconv("UTF-8", $this->sEncoding.'//TRANSLIT', $sValue);
					}
					else if ($sFuncToUse == "mb_convert_encoding")
					{
						$sValue = mb_convert_encoding($sValue, $this->sEncoding, "UTF-8");
					}
					else
					{
						$sValue = utf8_decode($sValue);
					}
				}
			}
		}
		return $sValue;	
	}
		
}// end class xajax 

/**
 * This function is registered with PHP's set_error_handler() function if
 * the xajax error handling system is turned on.
 */
function xajaxErrorHandler($errno, $errstr, $errfile, $errline)
{
	$errorReporting = error_reporting();
	if (($errno & $errorReporting) == 0) return;
	
	if ($errno == E_NOTICE) {
		$errTypeStr = "NOTICE";
	}
	else if ($errno == E_WARNING) {
		$errTypeStr = "WARNING";
	}
	else if ($errno == E_USER_NOTICE) {
		$errTypeStr = "USER NOTICE";
	}
	else if ($errno == E_USER_WARNING) {
		$errTypeStr = "USER WARNING";
	}
	else if ($errno == E_USER_ERROR) {
		$errTypeStr = "USER FATAL ERROR";
	}
	else if ($errno == E_STRICT) {
		return;
	}
	else {
		$errTypeStr = "UNKNOWN: $errno";
	}
	$GLOBALS['xajaxErrorHandlerText'] .= "\n----\n[$errTypeStr] $errstr\nerror in line $errline of file $errfile";
}

?>