1 files changed, 156 insertions, 0 deletions
diff --git a/b2g/components/Bootstraper.jsm b/b2g/components/Bootstraper.jsm
new file mode 100644
index 000000000..3d3fb37d9
--- /dev/null
+++ b/b2g/components/Bootstraper.jsm
@@ -0,0 +1,156 @@
+/* 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/. */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["Bootstraper"];
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+const CC = Components.Constructor;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/AppsUtils.jsm");
+
+function debug(aMsg) {
+  //dump("-*- Bootstraper: " + aMsg + "\n");
+}
+
+/**
+  * This module loads the manifest for app from the --start-url enpoint and
+  * ensures that it's installed as the system app.
+  */
+this.Bootstraper = {
+  _manifestURL: null,
+  _startupURL: null,
+
+  bailout: function(aMsg) {
+    dump("************************************************************\n");
+    dump("* /!\\ " + aMsg + "\n");
+    dump("************************************************************\n");
+    let appStartup = Cc["@mozilla.org/toolkit/app-startup;1"]
+                       .getService(Ci.nsIAppStartup);
+    appStartup.quit(appStartup.eForceQuit);
+  },
+
+  installSystemApp: function(aManifest) {
+    // Get the appropriate startup url from the manifest launch_path.
+    let base = Services.io.newURI(this._manifestURL, null, null);
+    let origin = base.prePath;
+    let helper = new ManifestHelper(aManifest, origin, this._manifestURL);
+    this._startupURL = helper.fullLaunchPath();
+
+    return new Promise((aResolve, aReject) => {
+      debug("Origin is " + origin);
+      let appData = {
+        app: {
+          installOrigin: origin,
+          origin: origin,
+          manifest: aManifest,
+          manifestURL: this._manifestURL,
+          manifestHash: AppsUtils.computeHash(JSON.stringify(aManifest)),
+          appStatus: Ci.nsIPrincipal.APP_STATUS_CERTIFIED
+        },
+        appId: 1,
+        isBrowser: false,
+        isPackage: false
+      };
+
+      //DOMApplicationRegistry.confirmInstall(appData, null, aResolve);
+    });
+  },
+
+  /**
+    * Resolves to a json manifest.
+    */
+  loadManifest: function() {
+    return new Promise((aResolve, aReject) => {
+      debug("Loading manifest " + this._manifestURL);
+
+      let xhr =  Cc["@mozilla.org/xmlextras/xmlhttprequest;1"]
+                 .createInstance(Ci.nsIXMLHttpRequest);
+      xhr.mozBackgroundRequest = true;
+      xhr.open("GET", this._manifestURL);
+      xhr.responseType = "json";
+      xhr.addEventListener("load", () => {
+        if (xhr.status >= 200 && xhr.status < 400) {
+          debug("Success loading " + this._manifestURL);
+          aResolve(xhr.response);
+        } else {
+          aReject("Error loading " + this._manifestURL);
+        }
+      });
+      xhr.addEventListener("error", () => {
+        aReject("Error loading " + this._manifestURL);
+      });
+      xhr.send(null);
+    });
+  },
+
+  configure: function() {
+    debug("Setting startup prefs... " + this._startupURL);
+    Services.prefs.setCharPref("b2g.system_manifest_url", this._manifestURL);
+    Services.prefs.setCharPref("b2g.system_startup_url", this._startupURL);
+    return Promise.resolve();
+  },
+
+  /**
+    * If a system app is already installed, uninstall it so that we can
+    * cleanly replace it by the current one.
+    */
+  uninstallPreviousSystemApp: function() {
+    // TODO: FIXME
+    return Promise.resolve();
+
+    let oldManifestURL;
+    try{
+      oldManifestURL = Services.prefs.getCharPref("b2g.system_manifest_url");
+    } catch(e) {
+      // No preference set, so nothing to uninstall.
+      return Promise.resolve();
+    }
+
+    let id = DOMApplicationRegistry.getAppLocalIdByManifestURL(oldManifestURL);
+    if (id == Ci.nsIScriptSecurityManager.NO_APP_ID) {
+      return Promise.resolve();
+    }
+    debug("Uninstalling " + oldManifestURL);
+    return DOMApplicationRegistry.uninstall(oldManifestURL);
+  },
+
+  /**
+   * Check if we are already configured to run from this manifest url.
+   */
+  isInstallRequired: function(aManifestURL) {
+    try {
+      if (Services.prefs.getCharPref("b2g.system_manifest_url") == aManifestURL) {
+        return false;
+      }
+    } catch(e) { }
+    return true;
+  },
+
+  /**
+    * Resolves once we have installed the app.
+    */
+  ensureSystemAppInstall: function(aManifestURL) {
+    this._manifestURL = aManifestURL;
+    debug("Installing app from " + this._manifestURL);
+
+    if (!this.isInstallRequired(this._manifestURL)) {
+      debug("Already configured for " + this._manifestURL);
+      return Promise.resolve();
+    }
+
+    return new Promise((aResolve, aReject) => {
+      this.uninstallPreviousSystemApp.bind(this)
+          .then(this.loadManifest.bind(this))
+          .then(this.installSystemApp.bind(this))
+          .then(this.configure.bind(this))
+          .then(aResolve)
+          .catch(aReject);
+    });
+  }
+};