class.ilLuceneIndexer.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. |
        +-----------------------------------------------------------------------------+
*/


class ilLuceneIndexer
{
        function ilLuceneIndexer()
        {
                global $ilLog,$ilDB;

                $this->log =& $ilLog;
                $this->db =& $ilDB;
        }

        function index()
        {
                // Todo check in settings which objects should be indexed
                $this->__flushIndex();
                $this->__indexFiles();
                $this->__indexHTLMs();

                return true;
        }

        // PRIVATE
        function __indexFiles()
        {
                include_once('Services/FileSystemStorage/classes/class.ilFileSystemStorage.php');
                
                global $tree;

                $query = "SELECT * FROM file_data ".
                        "WHERE file_type IN ('text/plain','application/pdf','text/html','text/x-pdf','application/x-pdf')";

                $res = $this->db->query($query);

                $counter = 0;
                $files = array();
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        ++$counter;
                        $bname = ilUtil::getDataDir();
                        $bname .= ("/ilFiles/");
                        $bname .= ilFileSystemStorage::_createPathFromId($row->file_id,'file');
                        $vname = (sprintf("%03d", $row->version));

                        if(is_file($bname.'/'.$vname.'/'.$row->file_name))
                        {
                                $files[$row->file_id] = $bname.'/'.$vname.'/'.$row->file_name;
                        }
                        else
                        {
                                $files[$row->file_id] = $bname.'/'.$row->file_name;
                        }
                }
                $this->log->write('Lucene indexer: Found '.$counter.' files for indexing');

                if(count($files))
                {
                        // Send files to lucene rpc server
                        include_once './Services/Search/classes/Lucene/class.ilLuceneRPCAdapter.php';

                        $rpc_adapter =& new ilLuceneRPCAdapter();
                        $rpc_adapter->setMode('file');
                        $rpc_adapter->setFiles($files);
                        if($rpc_adapter->send())
                        {
                                $this->log->write('Lucene indexer: files sent');
                        }
                        return true;
                }
        }
        function __indexHTLMs()
        {
                global $ilias;

                $query = "SELECT * FROM object_data WHERE type = 'htlm'";
                $res = $this->db->query($query);
                $counter = 0;
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        ++$counter;
                        $lms[$row->obj_id] = ILIAS_ABSOLUTE_PATH.'/'.ILIAS_WEB_DIR.'/'.CLIENT_ID.'/lm_data/lm_'.$row->obj_id;

                }
                $this->log->write('Lucene indexer: Found '.$counter.' html learning modules for indexing');

                if(count($lms))
                {
                        // Send files to lucene rpc server
                        include_once './Services/Search/classes/Lucene/class.ilLuceneRPCAdapter.php';

                        $rpc_adapter =& new ilLuceneRPCAdapter();
                        $rpc_adapter->setMode('htlm');
                        $rpc_adapter->setHTLMs($lms);
                        if($rpc_adapter->send())
                        {
                                $this->log->write('Lucene indexer: files sent');
                        }
                        return true;
                }
        }
        function __flushIndex()
        {
                include_once './Services/Search/classes/Lucene/class.ilLuceneRPCAdapter.php';

                $rpc_adapter =& new ilLuceneRPCAdapter();
                $rpc_adapter->setMode('flush');
                if($rpc_adapter->send())
                {
                        $this->log->write('Lucene indexer: deleted index');
                }
                return true;
        }               
}
?>