class.ilSearchAutoComplete.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */
 
include_once 'Services/Search/classes/class.ilSearchSettings.php';
 
class ilSearchAutoComplete
{
        
        public static function getLuceneList($a_str)
        {
                include_once './Services/Search/classes/Lucene/class.ilLuceneQueryParser.php';
                $qp = new ilLuceneQueryParser('title:'.$a_str.'*');
                $qp->parse();
                
                include_once './Services/Search/classes/Lucene/class.ilLuceneSearcher.php';
                $searcher = ilLuceneSearcher::getInstance($qp);
                $searcher->setType(ilLuceneSearcher::TYPE_STANDARD);
                $searcher->search();
                
                $res = $searcher->getResult()->getCandidates();
                
                $max_entries = ilSearchSettings::getInstance()->getAutoCompleteLength() ?
                        ilSearchSettings::getInstance()->getAutoCompleteLength() : 
                        10;
                
                
                $list = array();
                $num_entries = 0;
                foreach($res as $res_obj_id)
                {
                        if(self::checkObjectPermission($res_obj_id))
                        {
                                $list[] = ilObject::_lookupTitle($res_obj_id,true);
                                $num_entries++;
                        }
                        if($num_entries >= $max_entries)
                        {
                                break;
                        }
                }
                
                $i = 0;
                $result = array();
                foreach($list as $entry)
                {
                        $result[$i] = new stdClass();
                        $result[$i]->value = '"'.$entry.'"';
                        $i++;
                }
                include_once './Services/JSON/classes/class.ilJsonUtil.php';
                return ilJsonUtil::encode($result);
        }
        
        
        
        static function getList($a_str)
        {
                global $ilDB;
 
                include_once './Services/Search/classes/class.ilSearchSettings.php';
                if(ilSearchSettings::getInstance()->enabledLucene())
                {
                        return self::getLuceneList($a_str);
                }
                
                
                $a_str = str_replace('"', "", $a_str);
                
                $settings = new ilSearchSettings();
                
                $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','gdf','wiki');
 
                $set = $ilDB->query("SELECT title, obj_id FROM object_data WHERE "
                        .$ilDB->like('title', 'text', $a_str."%")." AND "
                        .$ilDB->in('type', $object_types, false, 'text')." ORDER BY title");
                $max = ($settings->getAutoCompleteLength() > 0)
                        ? $settings->getAutoCompleteLength()
                        : 10;
                
                $cnt = 0;
                $list = array();
                $checked = array();
                $lim = "";
                while (($rec = $ilDB->fetchAssoc($set)) && $cnt < $max)
                {
                        if (strpos($rec["title"], " ") > 0 || strpos($rec["title"], "-") > 0)
                        {
                                $rec["title"] = '"'.$rec["title"].'"';
                        }
                        if (!in_array($rec["title"], $list) && !in_array($rec["obj_id"], $checked))
                        {
                                if (ilSearchAutoComplete::checkObjectPermission($rec["obj_id"]))
                                {
                                        $list[] = $lim.$rec["title"];
                                        $cnt++;
                                }
                                $checked[] = $rec["obj_id"];
                        }
                }
                
                $set = $ilDB->query("SELECT rbac_id,obj_id,obj_type, keyword FROM il_meta_keyword WHERE "
                        .$ilDB->like('keyword', 'text', $a_str."%")." AND "
                        .$ilDB->in('obj_type', $object_types, false, 'text')." ORDER BY keyword");
                while (($rec = $ilDB->fetchAssoc($set)) && $cnt < $max)
                {
                        if (strpos($rec["keyword"], " ") > 0)
                        {
                                $rec["keyword"] = '"'.$rec["keyword"].'"';
                        }
                        if (!in_array($rec["keyword"], $list) && !in_array($rec["rbac_id"], $checked))
                        {
                                if (ilSearchAutoComplete::checkObjectPermission($rec["rbac_id"]))
                                {
                                        $list[] = $lim.$rec["keyword"];
                                        $cnt++;
                                }
                        }
                        $checked[] = $rec["rbac_id"];
                }
 
                $i = 0;
                $result = array();
                foreach ($list as $l)
                {
                        $result[$i] = new stdClass();
                        $result[$i]->value = $l;
                        $i++;
                }
 
                include_once './Services/JSON/classes/class.ilJsonUtil.php';
                return ilJsonUtil::encode($result);
        }
        
        static function checkObjectPermission($a_obj_id)
        {
                global $ilAccess;
                
                $refs = ilObject::_getAllReferences($a_obj_id);
                foreach ($refs as $ref)
                {
                        if ($ilAccess->checkAccess("read", "", $ref))
                        {
                                return true;
                        }
                }
                return false;
        }
}
?>