class.ilRating.php

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

class ilRating
{
        static function writeRatingForUserAndObject($a_obj_id, $a_obj_type, $a_sub_obj_id, $a_sub_obj_type,
                $a_user_id, $a_rating)
        {
                global $ilDB;

                if ($a_user_id == ANONYMOUS_USER_ID)
                {
                        return;
                }

                $ilDB->manipulate("DELETE FROM il_rating WHERE ".
                        "user_id = ".$ilDB->quote($a_user_id, "integer")." AND ".
                        "obj_id = ".$ilDB->quote((int) $a_obj_id, "integer")." AND ".
                        "obj_type = ".$ilDB->quote($a_obj_type, "text")." AND ".
                        "sub_obj_id = ".$ilDB->quote((int) $a_sub_obj_id, "integer")." AND ".
                        $ilDB->equals("sub_obj_type", $a_sub_obj_type, "text", true));
                
                $ilDB->manipulate("INSERT INTO il_rating (user_id, obj_id, obj_type,".
                        "sub_obj_id, sub_obj_type, rating) VALUES (".
                        $ilDB->quote($a_user_id, "integer").",".
                        $ilDB->quote((int) $a_obj_id, "integer").",".
                        $ilDB->quote($a_obj_type, "text").",".
                        $ilDB->quote((int) $a_sub_obj_id, "integer").",".
                        $ilDB->quote($a_sub_obj_type, "text").",".
                        $ilDB->quote((int) $a_rating, "integer").")");
        }
        
        static function getRatingForUserAndObject($a_obj_id, $a_obj_type, $a_sub_obj_id, $a_sub_obj_type,
                $a_user_id)
        {
                global $ilDB;
                
                $q = "SELECT * FROM il_rating WHERE ".
                        "user_id = ".$ilDB->quote($a_user_id, "integer")." AND ".
                        "obj_id = ".$ilDB->quote((int) $a_obj_id, "integer")." AND ".
                        "obj_type = ".$ilDB->quote($a_obj_type, "text")." AND ".
                        "sub_obj_id = ".$ilDB->quote((int) $a_sub_obj_id, "integer")." AND ".
                        $ilDB->equals("sub_obj_type", $a_sub_obj_type, "text", true);
                $set = $ilDB->query($q);
                $rec = $ilDB->fetchAssoc($set);
                return $rec["rating"];
        }
        
        static function getOverallRatingForObject($a_obj_id, $a_obj_type, $a_sub_obj_id, $a_sub_obj_type)
        {
                global $ilDB;
                
                $q = "SELECT count(*) as cnt, AVG(rating) as av FROM il_rating WHERE ".
                        "obj_id = ".$ilDB->quote((int) $a_obj_id, "integer")." AND ".
                        "obj_type = ".$ilDB->quote($a_obj_type, "text")." AND ".
                        "sub_obj_id = ".$ilDB->quote((int) $a_sub_obj_id, "integer")." AND ".
                        $ilDB->equals("sub_obj_type", $a_sub_obj_type, "text", true);
                $set = $ilDB->query($q);
                $rec = $ilDB->fetchAssoc($set);
                return array("cnt" => $rec["cnt"], "avg" => $rec["av"]);
        }

}

?>