michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * This component triggers a periodic webapp update check.
michael@0:  */
michael@0: 
michael@0: "use strict";
michael@0: 
michael@0: const Cc = Components.classes;
michael@0: const Ci = Components.interfaces;
michael@0: const Cu = Components.utils;
michael@0: 
michael@0: Cu.import("resource://gre/modules/Services.jsm");
michael@0: Cu.import("resource://gre/modules/WebappManager.jsm");
michael@0: Cu.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: 
michael@0: function log(message) {
michael@0:   // We use *dump* instead of Services.console.logStringMessage so the messages
michael@0:   // have the INFO level of severity instead of the ERROR level.  And we don't
michael@0:   // append a newline character to the end of the message because *dump* spills
michael@0:   // into the Android native logging system, which strips newlines from messages
michael@0:   // and breaks messages into lines automatically at display time (i.e. logcat).
michael@0:   dump(message);
michael@0: }
michael@0: 
michael@0: function WebappsUpdateTimer() {}
michael@0: 
michael@0: WebappsUpdateTimer.prototype = {
michael@0:   QueryInterface: XPCOMUtils.generateQI([Ci.nsITimerCallback,
michael@0:                                          Ci.nsISupportsWeakReference]),
michael@0:   classID: Components.ID("{8f7002cb-e959-4f0a-a2e8-563232564385}"),
michael@0: 
michael@0:   notify: function(aTimer) {
michael@0:     if (Services.prefs.getIntPref("browser.webapps.checkForUpdates") == 0) {
michael@0:       // Do nothing, because updates are disabled.
michael@0:       log("Webapps update timer invoked in webapp process; ignoring.");
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     // If we are offline, wait to be online to start the update check.
michael@0:     if (Services.io.offline) {
michael@0:       log("network offline for webapp update check; waiting");
michael@0:       Services.obs.addObserver(this, "network:offline-status-changed", true);
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     log("periodic check for webapp updates");
michael@0:     WebappManager.checkForUpdates();
michael@0:   },
michael@0: 
michael@0:   observe: function(aSubject, aTopic, aData) {
michael@0:     if (aTopic !== "network:offline-status-changed" || aData !== "online") {
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     log("network back online for webapp update check; commencing");
michael@0:     // TODO: observe pref to do this only on wifi.
michael@0:     Services.obs.removeObserver(this, "network:offline-status-changed");
michael@0:     WebappManager.checkForUpdates();
michael@0:   }
michael@0: };
michael@0: 
michael@0: this.NSGetFactory = XPCOMUtils.generateNSGetFactory([WebappsUpdateTimer]);