Bug 663571 - OS agnostic webapps backend [r=mbrubeck, r=mfinkle]

mobile/components/Makefile.in

@@ -75,6 +75,7 @@ EXTRA_COMPONENTS = \
         LoginManager.js \
         LoginManagerPrompter.js \
         BlocklistPrompt.js \
+        WebappsSupport.js \
         $(NULL)
 
 ifdef MOZ_SAFE_BROWSING

mobile/components/MobileComponents.manifest

@@ -120,3 +120,7 @@ category app-startup SafeBrowsing service,@mozilla.org/safebrowsing/application;
 component {88b3eb21-d072-4e3b-886d-f89d8c49fe59} UpdatePrompt.js
 contract @mozilla.org/updates/update-prompt;1 {88b3eb21-d072-4e3b-886d-f89d8c49fe59}
 #endif
+
+# webapps
+component {cb1107c1-1e15-4f11-99c8-27b9ec221a2a} WebappsSupport.js
+contract @mozilla.org/webapps/support;1 {cb1107c1-1e15-4f11-99c8-27b9ec221a2a}

mobile/components/WebappsSupport.js

@@ -0,0 +1,125 @@
+/* ***** 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 Mozilla Mobile Browser.
+ *
+ * The Initial Developer of the Original Code is Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Fabrice Desré <fabrice@mozilla.com>
+ *   Mark Finkle <mfinkle@mozilla.com>
+ *
+ * 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 ***** */
+
+const Cu = Components.utils; 
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+const DB_VERSION = 1;
+
+function WebappsSupport() {
+  this.init();
+}
+
+WebappsSupport.prototype = {
+  db: null,
+  
+  init: function() {
+    let file =  Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties).get("ProfD", Ci.nsIFile);
+    file.append("webapps.sqlite");
+    this.db = Services.storage.openDatabase(file);
+    let version = this.db.schemaVersion;
+    
+    if (version == 0) {
+      this.db.executeSimpleSQL("CREATE TABLE webapps (title TEXT, uri TEXT PRIMARY KEY, icon TEXT)");
+      this.db.schemaVersion = DB_VERSION;
+    }
+
+    XPCOMUtils.defineLazyGetter(this, "_installQuery", function() {
+      return this.db.createAsyncStatement("INSERT INTO webapps (title, uri, icon) VALUES(:title, :uri, :icon)");
+    });
+
+    XPCOMUtils.defineLazyGetter(this, "_findQuery", function() {
+      return this.db.createStatement("SELECT uri FROM webapps where uri = :uri");
+    });
+
+    Services.obs.addObserver(this, "quit-application-granted", false);
+  },
+ 
+  // entry point
+  installApplication: function(aTitle, aURI, aIconURI, aIconData) {
+    let stmt = this._installQuery;
+    stmt.params.title = aTitle;
+    stmt.params.uri = aURI;
+    stmt.params.icon = aIconData;
+    stmt.executeAsync();
+  },
+ 
+  isApplicationInstalled: function(aURI) {
+    let stmt = this._findQuery;
+    let found = false;
+    try {
+      stmt.params.uri = aURI;
+      found = stmt.executeStep();
+    } finally {
+      stmt.reset();
+    }
+    return found;
+  },
+
+  // nsIObserver
+  observe: function(aSubject, aTopic, aData) {
+    Services.obs.removeObserver(this, "quit-application-granted");
+
+    // Finalize the statements that we have used
+    let stmts = [
+      "_installQuery",
+      "_findQuery"
+    ];
+    for (let i = 0; i < stmts.length; i++) {
+      // We do not want to create any query we haven't already created, so
+      // see if it is a getter first.
+      if (Object.getOwnPropertyDescriptor(this, stmts[i]).value !== undefined) {
+        this[stmts[i]].finalize();
+      }
+    }
+
+    this.db.asyncClose();
+  },
+
+  // QI
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebappsSupport]),
+
+  // XPCOMUtils factory
+  classID: Components.ID("{cb1107c1-1e15-4f11-99c8-27b9ec221a2a}")
+};
+
+const NSGetFactory = XPCOMUtils.generateNSGetFactory([WebappsSupport]);
+