class.ilAbstractSearch.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 ilAbstractSearch
{
        /*
         * instance of db object
         */
        var $db = null;
        /*
         * instance of query parser
         */
        var $query_parser = null;
        
        /*
         * instance of result obj
         */
        var $search_result = null;

        /*
         * List of all searchable objects
         */
        var $object_types = array('cat','dbk','crs','fold','frm','grp','lm','sahs','glo','mep','htlm','exc','file','qpl','tst','svy','spl',
                                                 'chat','icrs','icla','webr','mcst','sess','pg','st','wiki');


        function ilAbstractSearch(&$qp_obj)
        {
                global $ilDB;

                $this->query_parser =& $qp_obj;
                $this->db =& $ilDB;

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

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

        function setFields($a_fields)
        {
                $this->fields = $a_fields;
        }

        function getFields()
        {
                return $this->fields ? $this->fields : array();
        }

        function setFilter($a_filter)
        {
                if(is_array($a_filter))
                {
                        $this->object_types = $a_filter;
                }
        }

        function appendToFilter($a_type)
        {
                if(is_array($this->object_types))
                {
                        if(in_array($a_type,$this->object_types))
                        {
                                return false;
                        }
                }
                $this->object_types[] = $a_type;
                
                return true;
        }


        function getFilter()
        {
                return $this->object_types ? $this->object_types : array();
        }

        function __createLocateString()
        {
                if($this->query_parser->getCombination() == 'or')
                {
                        return '';
                }
                if(count($this->fields) > 1)
                {
                        $complete_str = 'CONCAT(';
                        $complete_str .= implode(',',$this->fields);
                        $complete_str .= ')';
                }
                else
                {
                        $complete_str = $this->fields[0];
                }

                $counter = 0;
                foreach($this->query_parser->getQuotedWords() as $word)
                {
                        $locate .= (", LOCATE('".$word."',".$complete_str.") ");
                        $locate .= ("as found".$counter++." ");
                }
                
                return $locate;
        }

        function __prepareFound(&$row)
        {
                if($this->query_parser->getCombination() == 'or')
                {
                        return array();
                }
                $counter = 0;
                foreach($this->query_parser->getQuotedWords() as $word)
                {
                        $res_found = "found".$counter++;
                        $found[] = $row->$res_found;
                }
                return $found ? $found : array();
        }

        function &performSearch()
        {
                echo "Should be overwritten.";
        }


}
?>