BackgroundTask_update.jsm

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm", this);

// XPCOMUtils.defineLazyModuleGetters(this, {
//   SessionStore: "resource:///modules/sessionstore/SessionStore.jsm",
// });

var EXPORTED_SYMBOLS = ["runBackgroundTask"];

const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
const { XPCOMUtils } = ChromeUtils.import(
  "resource://gre/modules/XPCOMUtils.jsm"
);

XPCOMUtils.defineLazyModuleGetters(this, {
  setTimeout: "resource://gre/modules/Timer.jsm",
});

// Notes to self:
//
// It's BrowserContentHandler.jsm that sends the update success ping.
// That won't happen when launching a background service.  Best to
// check that we witness the update at the next run, and think about
// sending some other ping from background services.
//
// The update ready ping is sent based on the `update-downloaded` and
// `update-staged` observer notifactions.  I think that
// `UpdatePing.earlyInit()` will be called in background services, but
// it seems those notifications may race shutdown.

function runBackgroundTask() {
  // TODO: do better here.
  Services.prefs.setBoolPref("app.update.langpack.enabled", false);

  console.error("runBackgroundTask... 3");

  const { AppUpdater } = ChromeUtils.import(
    "resource:///modules/AppUpdater.jsm"
  );

  let p = new Promise(resolve => {
    try {
      let appUpdater = new AppUpdater();

      let _appUpdaterListener = status => {
        console.log(`_appUpdaterListener: ${status}`);
        if (AppUpdater.STATUS.isTerminalStatus(status)) {
          appUpdater.removeListener(_appUpdaterListener);
          resolve(0);
        }
      };
      appUpdater.addListener(_appUpdaterListener);

      appUpdater.check();
    } catch (e) {
      console.log(`e: ${e}`, e, e.stack);
      throw e;
    }
  });

  return p;
}