class.ilHTMLToPDFTransformerUsingFOP.php

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<?php
 /*
   +----------------------------------------------------------------------------+
   | ILIAS open source                                                          |
   +----------------------------------------------------------------------------+
   | Copyright (c) 1998-2001 ILIAS open source, University of Cologne           |
   |                                                                            |
   | This program is free software; you can redistribute it and/or              |
   | modify it under the terms of the GNU General Public License                |
   | as published by the Free Software Foundation; either version 2             |
   | of the License, or (at your option) any later version.                     |
   |                                                                            |
   | This program is distributed in the hope that it will be useful,            |
   | but WITHOUT ANY WARRANTY; without even the implied warranty of             |
   | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              |
   | GNU General Public License for more details.                               |
   |                                                                            |
   | You should have received a copy of the GNU General Public License          |
   | along with this program; if not, write to the Free Software                |
   | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
   +----------------------------------------------------------------------------+
*/

include_once "./Services/PDF/classes/class.ilHTMLToPDFTransformer.php";

class ilHTMLToPDFTransformerUsingFOP extends ilHTMLToPDFTransformer
{
        public function createPDFFileFromHTMLFile($a_source, $a_target)
        {
          $input = file_get_contents($a_source);
          $this->createPDFFileFromFO($this->processHTML2FO($input), $a_target);
        }

        public function createPDFFileFromHTMLString($a_string, $a_target)
        {
          $this->createPDFFileFromFO($this->processHTML2FO($a_string), $a_target);
        }

        public function deliverPDFFromHTMLString($a_string)
        {
                $this->deliverPDFFromFO($this->processHTML2FO($a_string));
        }
        
        public function deliverPDFFromHTMLFile($a_path)
        {
                if (@file_exists($a_path))
                {
                        $this->deliverPDFFromHTMLString(file_get_contents($a_path));
                }
        }

        protected function processHTML2FO($print_output)
        {
                if (!@file_exists($this->xsl)) return "";
                if (extension_loaded("tidy"))
                {
                        $config = array(
                                "indent"         => false,
                                "output-xml"     => true,
                                "numeric-entities" => true
                        );
                        $tidy = new tidy();
                        $tidy->parseString($print_output, $config, 'utf8');
                        $tidy->cleanRepair();
                        $print_output = tidy_get_output($tidy);
                        $print_output = preg_replace("/^.*?(<html)/", "\\1", $print_output);
                }
                $xsl = file_get_contents($this->xsl);
                $args = array( '/_xml' => $print_output, '/_xsl' => $xsl );
                $xh = xslt_create();
                $params = array();
                $output = xslt_process($xh, "arg:/_xml", "arg:/_xsl", NULL, $args, $params);
                xslt_error($xh);
                xslt_free($xh);
                return $output;
        }

        protected function deliverPDFFromFO($fo)
        {
                global $ilLog;

                include_once "./Services/Utilities/classes/class.ilUtil.php";
                $fo_file = ilUtil::ilTempnam() . ".fo";
                $fp = fopen($fo_file, "w"); fwrite($fp, $fo); fclose($fp);
                include_once './Services/WebServices/RPC/classes/class.ilRpcClientFactory.php';
                try
                {
                        $pdf_base64 = ilRpcClientFactory::factory('RPCTransformationHandler')->ilFO2PDF($fo);
                        ilUtil::deliverData($pdf_base64->scalar, $this->filename, "application/pdf", false, true);
                        return true;
                }
                catch(XML_RPC2_FaultException $e)
                {
                        $ilLog->write(__METHOD__.': '.$e->getMessage());
                        return false;
                }
                catch(Exception $e)
                {
                        $ilLog->write(__METHOD__.': '.$e->getMessage());
                        return false;
                }
        }

        protected function createPDFFileFromFO($fo, $target)
        {
                global $ilLog;

                include_once "./Services/Utilities/classes/class.ilUtil.php";
                $fo_file = ilUtil::ilTempnam() . ".fo";
                $fp = fopen($fo_file, "w"); fwrite($fp, $fo); fclose($fp);
                include_once './Services/WebServices/RPC/classes/class.ilRpcClientFactory.php';
                try
                {
                        $pdf_base64 = ilRpcClientFactory::factory('RPCTransformationHandler')->ilFO2PDF($fo);
                        //$pdf_binary = base64_decode($pdf_base64);
                        //file_put_contents($target, $pdf_binary);
                        file_put_contents($target, $pdf_base64->scalar);
                        return true;
                }
                catch(XML_RPC2_FaultException $e)
                {
                        $ilLog->write(__METHOD__.': '.$e->getMessage());
                        return false;
                }
                catch(Exception $e)
                {
                        $ilLog->write(__METHOD__.': '.$e->getMessage());
                        return false;
                }
                // TODO: catch possible exceptions caused by file_put_contents failing
        }
}

?>