diff -r 000000000000 -r 6474c204b198 webapprt/WebappRT.jsm
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webapprt/WebappRT.jsm	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,138 @@
+/* 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/. */
+
+this.EXPORTED_SYMBOLS = ["WebappRT"];
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/AppsUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "FileUtils",
+  "resource://gre/modules/FileUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "OS",
+  "resource://gre/modules/osfile.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "Task",
+  "resource://gre/modules/Task.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, 'NativeApp',
+  'resource://gre/modules/NativeApp.jsm');
+
+XPCOMUtils.defineLazyServiceGetter(this, "appsService",
+                                  "@mozilla.org/AppsService;1",
+                                  "nsIAppsService");
+
+this.WebappRT = {
+  get launchURI() {
+    return this.localeManifest.fullLaunchPath();
+  },
+
+  get localeManifest() {
+    return new ManifestHelper(this.config.app.manifest,
+                              this.config.app.origin);
+  },
+
+  get appID() {
+    let manifestURL = WebappRT.config.app.manifestURL;
+    if (!manifestURL) {
+      return Ci.nsIScriptSecurityManager.NO_APP_ID;
+    }
+
+    return appsService.getAppLocalIdByManifestURL(manifestURL);
+  },
+
+  loadConfig: function() {
+    if (this.config) {
+      return;
+    }
+
+    let webappJson = OS.Path.join(Services.dirsvc.get("AppRegD", Ci.nsIFile).path,
+                                  "webapp.json");
+    this.config = yield AppsUtils.loadJSONAsync(webappJson);
+  },
+
+  isUpdatePending: Task.async(function*() {
+    let webappJson = OS.Path.join(Services.dirsvc.get("AppRegD", Ci.nsIFile).path,
+                                  "update", "webapp.json");
+
+    if (!(yield OS.File.exists(webappJson))) {
+      return false;
+    }
+
+    return true;
+  }),
+
+  applyUpdate: Task.async(function*() {
+    let webappJson = OS.Path.join(Services.dirsvc.get("AppRegD", Ci.nsIFile).path,
+                                  "update", "webapp.json");
+    let config = yield AppsUtils.loadJSONAsync(webappJson);
+
+    let nativeApp = new NativeApp(config.app, config.app.manifest,
+                                  config.app.categories,
+                                  config.registryDir);
+    try {
+      yield nativeApp.applyUpdate();
+    } catch (ex) {
+      return false;
+    }
+
+    // The update has been applied successfully, the new config file
+    // is the config file that was in the update directory.
+    this.config = config;
+
+    return true;
+  }),
+
+  startUpdateService: function() {
+    let manifestURL = WebappRT.config.app.manifestURL;
+    // We used to install apps without storing their manifest URL.
+    // Now we can't update them.
+    if (!manifestURL) {
+      return;
+    }
+
+    // Check for updates once a day.
+    let timerManager = Cc["@mozilla.org/updates/timer-manager;1"].
+                       getService(Ci.nsIUpdateTimerManager);
+    timerManager.registerTimer("updateTimer", () => {
+      let window = Services.wm.getMostRecentWindow("webapprt:webapp");
+      window.navigator.mozApps.mgmt.getAll().onsuccess = function() {
+        let thisApp = null;
+        for (let app of this.result) {
+          if (app.manifestURL == manifestURL) {
+            thisApp = app;
+            break;
+          }
+        }
+
+        // This shouldn't happen if the app is installed.
+        if (!thisApp) {
+          Cu.reportError("Couldn't find the app in the webapps registry");
+          return;
+        }
+
+        thisApp.ondownloadavailable = () => {
+          // Download available, download it!
+          thisApp.download();
+        };
+
+        thisApp.ondownloadsuccess = () => {
+          // Update downloaded, apply it!
+          window.navigator.mozApps.mgmt.applyDownload(thisApp);
+        };
+
+        thisApp.ondownloadapplied = () => {
+          // Application updated, nothing to do.
+        };
+
+        thisApp.checkForUpdate();
+      }
+    }, 24 * 60 * 60);
+  },
+};