<?php 
// ##################################################################################
// Title                     : class_xslt.php
// Version                   : 1.1
// Author                    : Luis Argerich (lrargerich@yahoo.com)
// Last modification date    : 03-11-2002
// Description               : An abstraction class for the XSLT extension
//                             this one uses the Sablotron processor but we
//                             may release classes based on other processors
//                             later.
// ##################################################################################
// History: 
// 03-11-2001    Class modified to work with the new XSLT extension
// 11-11-2001    Class created
// ##################################################################################
// To-Dos:
// ##################################################################################
// How to use it:
// include_once("class_xslt.php");
// $xslt=new Xslt();
// $xslt->setXml("applications.xml"); // or setXmlString($xml)
// $xslt->setXsl("tr1.xsl");          // or setXslString($xsl)
// if($xslt->transform()) {
//    $ret=$xslt->getOutput();
//    echo $ret;
// } else {
//    print("Error:".$xslt->getError());
// }
// ##################################################################################
   

// CHECK FOR DOUBLE DEFINITION HERE
if(defined("_class_xslt_is_included")) {
  // do nothing since the class is already included  
} else {
  define("_class_xslt_is_included",1); 

class Xslt { 
   var $xsl, $xml, $output, $error ; 
   
   /* Constructor */ 
   function xslt() { 
      $this->processor = xslt_create(); 
   } 
   
   /* Destructor */ 
   function destroy() { 
      xslt_free($this->processor); 
   } 
   
   /* output methods */ 
   function setOutput($string) { 
      $this->output = $string; 
   } 
   
   function getOutput() { 
      return $this->output; 
   } 
   
   /* set methods */
   function setXmlString($xml) {
      $this->xml=$xml;
      return true;
   }

   function setXslString($xsl) {
      $this->xsl=$xsl;
      return true;
   }
 
   function setXml($uri) {
      if($doc = new docReader($uri)) { 
         $this->xml = $doc->getString(); 
         return true; 
      } else { 
         $this->setError("Could not open $xml"); 
         return false; 
      } 
   } 
   
   function setXsl($uri) { 
      if($doc = new docReader($uri)) { 
         $this->xsl = $doc->getString(); 
         return true; 
      } else { 
         $this->setError("Could not open $uri"); 
         return false; 
      } 
   } 
   
   /* transform method */ 
   function transform() {
      $arguments = array(
           '/_xml' => $this->xml,
           '/_xsl' => $this->xsl
      );
      $ret = xslt_process($this->processor, 'arg:/_xml', 'arg:/_xsl', NULL, $arguments);
      if(!$ret) {
        $this->setError(xslt_error($this->processor));
	return false;
      } else {
        $this->setOutput($ret); 
	return true;
      }
   } 

   /* Error Handling */ 
   function setError($string) { 
      $this->error = $string; 
   } 
   
   function getError() { 
      return $this->error; 
   } 
} 



/* docReader -- read a file or URL as a string */ 
/* test */ 
/* 
   $docUri = new docReader('http://www.someurl.com/doc.html'); 
   echo $docUri->getString(); 
*/ 
class docReader { 
   var $string; // public string representation of file 
   var $type; // private URI type: 'file','url' 
   var $bignum = 1000000;
   var $uri; 
   /* public constructor */ 
   function docReader($uri) { // returns integer      $this->setUri($uri); 
      $this->uri=$uri;
      $this->setType(); 
      $fp = fopen($this->getUri(),"r"); 
      if($fp) { // get length 
         if ($this->getType() == 'file') { 
            $length = filesize($this->getUri()); 
         } else { 
            $length = $this->bignum; 
         } 
      $this->setString(fread($fp,$length)); 
         return 1; 
      } else { 
         return 0; 
      } 
   } 
   /* determine if a URI is a filename or URL */ 
   function isFile($uri) { // returns boolean
      if (strstr($uri,'http://') == $uri) { 
         return false; 
      } else { 
         return true; 
      } 
   } 
   /* set and get methods */ 
   function setUri($string) { 
      $this->uri = $string; 
   } 
   function getUri() { 
      return $this->uri; 
   } 
   function setString($string) { 
      $this->string = $string; 
   } 
   function getString() { 
      return $this->string; 
   } 
   function setType() { 
      if ($this->isFile($this->uri)) { 
         $this->type = 'file';
      } else { 
         $this->type = 'url';
      } 
   } 
   function getType() { 
      return $this->type; 
   } 
} 


}
?>