class.ilNewsSubscription.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2006 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 ilNewsSubscription
{
        public static function _subscribe($a_ref_id, $a_user_id)
        {
                global $ilDB;
                
                $query = "REPLACE INTO il_news_subscription (ref_id, user_id) VALUES (".
                        $ilDB->quote($a_ref_id).", ".
                        $ilDB->quote($a_user_id).")";
                $ilDB->query($query);
        }

        public static function _unsubscribe($a_ref_id, $a_user_id)
        {
                global $ilDB;
                
                $query = "DELETE FROM il_news_subscription WHERE ref_id  = ".
                        $ilDB->quote($a_ref_id)." AND user_id = ".
                        $ilDB->quote($a_user_id);
                $ilDB->query($query);
        }

        public static function _hasSubscribed($a_ref_id, $a_user_id)
        {
                global $ilDB;
                
                $query = "SELECT * FROM il_news_subscription WHERE ref_id = ".
                        $ilDB->quote($a_ref_id)." AND user_id = ".
                        $ilDB->quote($a_user_id);
                $set = $ilDB->query($query);
                if ($rec = $set->fetchRow(DB_FETCHMODE_ASSOC))
                {
                        return true;
                }
                else
                {
                        return false;
                }
        }

        public static function _getSubscriptionsOfUser($a_user_id)
        {
                global $ilDB;
                
                $query = "SELECT * FROM il_news_subscription WHERE user_id = ".
                        $ilDB->quote($a_user_id);
                $set = $ilDB->query($query);
                $ref_ids = array();
                while ($rec = $set->fetchRow(DB_FETCHMODE_ASSOC))
                {
                        $ref_ids[] = $rec["ref_id"];
                }

                return $ref_ids;
        }
}
?>