class.ilChatroomConverter.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilChatroomConverter
{
        public function backupHistoryToXML()
        {
                global $ilDB;

                $res = $ilDB->query("
                        SELECT          chat_id, room_id
                        FROM            chat_room_messages
                        GROUP BY        chat_id, room_id
                ");

                $chat_room_id_comb = array();

                while($row = $ilDB->fetchAssoc($res))
                {
                        $chat_room_id_comb[] = array($row['chat_id'], $row['room_id']);
                }

                foreach($chat_room_id_comb as $combination)
                {
                        $res = $ilDB->queryF("
                                SELECT          *
                                FROM            chat_room_messages
                                WHERE           chat_id = %s
                                AND                     room_id = %s",

                                array('integer', 'integer'),
                                array($combination[0], $combination[1])
                        );

                        $xml = new SimpleXMLElement('<entries />');
                        $xml->addAttribute('chat_id', $combination[0]);
                        $xml->addAttribute('room_id', $combination[1]);

                        while($row = $ilDB->fetchAssoc($res))
                        {
                                $child = $xml->addChild('entry', $row['message']);
                                $child->addAttribute('timestamp', $row['commit_timestamp']);
                        }

                        $xml->asXML();
                }
        }
}