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71 lines
2.8 KiB
PHP
71 lines
2.8 KiB
PHP
<?php
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/**
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* Global Search Engine for Moodle
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*
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* @package search
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* @category core
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* @subpackage document_wrappers
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* @author Valery Fremaux [valery.fremaux@club-internet.fr] > 1.8
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* @date 2008/03/31
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @version revised for Moodle 2.0
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*
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* @note : The Adobe SWF Converters library is not GPL, although it can be of free use in some
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* situations. This file is provided for convenience, but should use having a glance at
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* {@link http://www.adobe.com/licensing/developer/}
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*
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* this is a format handler for getting text out of a proprietary binary format
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* so it can be indexed by Lucene search engine
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*/
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/**
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* @param object $resource
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* @param string $directfile if the resource is given as a direct file path, use it as reference to the file
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* @uses $CFG
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*/
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function get_text_for_indexing_swf(&$resource, $directfile = ''){
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global $CFG;
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// SECURITY : do not allow non admin execute anything on system !!
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if (!has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) return;
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// adds moodle root switch if none was defined
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if (!isset($CFG->block_search_usemoodleroot)){
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set_config('block_search_usemoodleroot', 1);
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}
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$moodleroot = ($CFG->block_search_usemoodleroot) ? "{$CFG->dirroot}/" : '' ;
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// just call pdftotext over stdout and capture the output
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if (!empty($CFG->block_search_pdf_to_text_cmd)){
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$command = trim($CFG->block_search_swf_to_text_cmd);
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if (!file_exists("{$moodleroot}{$command}")){
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mtrace('Error with swf to text converter command : executable not found as '.$moodleroot.$command);
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} else {
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if ($directfile == ''){
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$file = escapeshellarg("{$CFG->dataroot}/{$resource->course}/{$resource->reference}");
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} else {
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$file = escapeshellarg("{$CFG->dataroot}/{$directfile}");
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}
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$text_converter_cmd = "{$moodleroot}{$command} -t $file";
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$result = shell_exec($text_converter_cmd);
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// result is in html. We must strip it off
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$result = preg_replace("/<[^>]*>/", '', $result);
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$result = preg_replace("/<!--[^>]*-->/", '', $result);
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$result = html_entity_decode($result, ENT_COMPAT, 'UTF-8');
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$result = mb_convert_encoding($result, 'UTF-8', 'auto');
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if ($result){
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return $result;
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} else {
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mtrace('Error with swf to text converter command : execution failed for '.$text_converter_cmd.'. Check for execution permission on swf converter executable.');
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return '';
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}
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}
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} else {
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mtrace('Error with swf to text converter command : command not set up. Execute once search block configuration.');
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return '';
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}
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}
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?>
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