class.ilMDSearch.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 ilMDSearch
{
    public $mode = '';

    /*
     * instance of query parser
     */
    public $query_parser = null;

    public $db = null;

    public function __construct($qp_obj)
    {
        global $DIC;

        $ilDB = $DIC['ilDB'];
        
        $this->query_parser = $qp_obj;
        $this->db = $ilDB;

        include_once 'Services/Search/classes/class.ilSearchResult.php';

        $this->search_result = new ilSearchResult();
    }

    public function setMode($a_mode)
    {
        $this->mode = $a_mode;
    }
    public function getMode()
    {
        return $this->mode;
    }


    public function &performSearch()
    {
        switch ($this->getMode()) {
            case 'all':
                break;
            case 'keyword':
                return $this->__searchKeywordsOnly();
                break;

            default:
                echo "ilMDSearch::performSearch() no mode given";
                return false;
        }
    }



    // Private
    public function __searchKeywordsOnly()
    {
        $where = " WHERE ";
        $field = " keyword ";
        $counter = 0;
        foreach ($this->query_parser->getQuotedWords() as $word) {
            if ($counter++) {
                $where .= strtoupper($this->query_parser->getCombination());
            }
            $where .= $field;
            $where .= ("LIKE (" . $ilDB->quote("%" . $word . "%") . ")");
        }

        $query = "SELECT * FROM il_meta_keyword" .
            $where .
            "ORDER BY meta_keyword_id DESC";

        $res = $this->db->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $this->search_result->addEntry($row->obj_id, $row->obj_type, $row->rbac_id);
        }

        return $this->search_result;
    }
}