/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Update Timer Manager
 *
 * The Initial Developer of the Original Code is Google Inc.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Ben Goodger <ben@mozilla.org>
 *  Robert Strong <robert.bugzilla@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsITimerCallback;

/**
 * An interface describing a global application service that allows long
 * duration (e.g. 1-7 or more days, weeks or months) timers to be registered
 * and then fired.
 */
[scriptable, uuid(0765c92c-6145-4253-9db4-594d8023087e)]
interface nsIUpdateTimerManager : nsISupports
{
  /**
   * Register an interval with the timer manager. The timer manager
   * periodically checks to see if the interval has expired and if it has
   * calls the specified callback. This is persistent across application
   * restarts and can handle intervals of long durations.
   * @param   id
   *          An id that identifies the interval, used for persistence
   * @param   callback
   *          A nsITimerCallback object that is notified when the interval
   *          expires
   * @param   interval
   *          The length of time, in seconds, of the interval
   *
   * Note: to avoid having to instantiate a component to call registerTimer
   * the component can intead register an update-timer category with comma
   * separated values as a single string representing the timer as follows.
   *
   * _xpcom_categories: [{ category: "update-timer",
   *                       value: "contractID," +
   *                              "method," +
   *                              "id," +
   *                              "preference," +
   *                              "interval" }],
   * the values are as follows
   *   contractID : the contract ID for the component.
   *   method     : the method used to instantiate the interface. This should be
   *                either getService or createInstance depending on your
   *                component.
   *   id         : the id that identifies the interval, used for persistence.
   *   preference : the preference to for timer interval. This value can be
   *                optional by specifying an empty string for the value.
   *   interval   : the default interval in seconds for the timer.
   */
  void registerTimer(in AString id,
                     in nsITimerCallback callback,
                     in unsigned long interval);
};