gecko/toolkit/mozapps/update/nsUpdateServiceStub.js

/* -*- Mode: C++; tab-width: 8; 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 Service Stub.
#
# The Initial Developer of the Original Code is Mozilla Foundation
# Portions created by the Initial Developer are Copyright (C) 2009
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
#  Robert Strong <robert.bugzilla@gmail.com> (Original Author)
#
# 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 ***** */
*/
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/FileUtils.jsm");

const Ci = Components.interfaces;

const DIR_UPDATES         = "updates";
const FILE_UPDATE_STATUS  = "update.status";

const KEY_APPDIR          = "XCurProcD";

#ifdef XP_WIN
#ifndef WINCE
#define USE_UPDROOT
#endif
#elifdef ANDROID
#define USE_UPDROOT
#endif

#ifdef USE_UPDROOT
const KEY_UPDROOT         = "UpdRootD";
#endif

/**
#  Gets the specified directory at the specified hierarchy under the update root
#  directory without creating it if it doesn't exist.
#  @param   pathArray
#           An array of path components to locate beneath the directory
#           specified by |key|
#  @return  nsIFile object for the location specified.
 */
function getUpdateDirNoCreate(pathArray) {
#ifdef USE_UPDROOT
  try {
    let dir = FileUtils.getDir(KEY_UPDROOT, pathArray, false);
    return dir;
  } catch (e) {
  }
#endif
  return FileUtils.getDir(KEY_APPDIR, pathArray, false);
}

function UpdateServiceStub() {
  let statusFile = getUpdateDirNoCreate([DIR_UPDATES, "0"]);
  statusFile.append(FILE_UPDATE_STATUS);
  // If the update.status file exists then initiate post update processing.
  if (statusFile.exists()) {
    let aus = Components.classes["@mozilla.org/updates/update-service;1"].
              getService(Ci.nsIApplicationUpdateService).
              QueryInterface(Ci.nsIObserver);
    aus.observe(null, "post-update-processing", "");
  }
}
UpdateServiceStub.prototype = {
  observe: function(){},
  classID: Components.ID("{e43b0010-04ba-4da6-b523-1f92580bc150}"),
  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver])
};

var NSGetFactory = XPCOMUtils.generateNSGetFactory([UpdateServiceStub]);