class.ilAbstractSearch.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */
 
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','webr','mcst','sess','pg','st','wiki','book');
                                                 
        private $id_filter = array();
 
 
        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;
                }
        }
        
        public function setIdFilter($a_id_filter)
        {
                $this->id_filter = $a_id_filter;
        }
        
        public function getIdFilter()
        {
                return (array) $this->id_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()
        {
                global $ilDB;
                
                if($this->query_parser->getCombination() == 'or')
                {
                        return '';
                }
                if(count($this->fields) > 1)
                {
                        foreach($this->fields as $field)
                        {
                                $tmp_fields[] = array($field,'text'); 
                        }
                        $complete_str = $ilDB->concat($tmp_fields);
                        
                        /*
                        $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 .= $ilDB->locate($ilDB->quote($word,'text'),$complete_str);
                        $locate .= (' found'.$counter++);
                        $locate .= ' ';
                        #$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.";
        }
 
 
}
?>