<?php
/**
 * $Id$
 *
 * KnowledgeTree Community Edition
 * Document Management Made Simple
 * Copyright (C) 2008, 2009 KnowledgeTree Inc.
 * 
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 3 as published by the
 * Free Software Foundation.
 * 
 * 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, see <http://www.gnu.org/licenses/>.
 * 
 * You can contact KnowledgeTree Inc., PO Box 7775 #87847, San Francisco, 
 * California 94120-7775, or email info@knowledgetree.com.
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * KnowledgeTree" logo and retain the original copyright notice. If the display of the 
 * logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
 * must display the words "Powered by KnowledgeTree" and retain the original 
 * copyright notice.
 * Contributor( s): ______________________________________
 *
 */

class KTNotificationRegistry {
    var $notification_types = array();
    var $notification_types_path = array();
    var $notification_instances = array();

    static function &getSingleton () {
		if (!KTUtil::arrayGet($GLOBALS['_KT_PLUGIN'], 'oKTNotificationRegistry')) {
			$GLOBALS['_KT_PLUGIN']['oKTNotificationRegistry'] = new KTNotificationRegistry;
		}
		return $GLOBALS['_KT_PLUGIN']['oKTNotificationRegistry'];
    }


    // pass in:
    //   nsname (e.g. ktcore/subscription)
    //   classname (e.g. KTSubscriptionNotification)
    function registerNotificationHandler($nsname, $className, $path = "") {
        $this->notification_types[$nsname] = $className;
        $this->notification_types_path[$nsname] = $path;
    }

    // FIXME insert into notification instances {PERF}

    function getHandler($nsname) {
        if (!array_key_exists($nsname, $this->notification_types)) {
            return null;
        } else {
            if (array_key_exists($nsname, $this->notification_types_path)) {
                $path = $this->notification_types_path[$nsname];
                if ($path) {
                    if (file_exists($path)) {
                        require_once($path);
                    }
                }
            }
            return new $this->notification_types[$nsname];
        }
    }
}

?>