initial upload of new Javascript Frontend based on ExtJS (by Johannes)

- contains ExtJS Library 4.1.1a, together with css and images
  - is related to the module 93_DbLog.pm, which holds some functions used by the frontend

git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@2767 2b470e98-0d58-463d-a4d8-8e2adae1ed80

www/frontend/app/app.js

@@ -0,0 +1,57 @@
+/**
+ * Setup the application
+ */
+
+Ext.Loader.setConfig({
+    enabled: true,
+    disableCaching: false,
+    paths: {
+        'FHEM': 'app'
+    }
+});
+
+Ext.application({
+    name: 'FHEM Frontend',
+    requires: [
+        'FHEM.view.Viewport'        
+    ],
+
+    controllers: [
+        'FHEM.controller.MainController',
+        'FHEM.controller.ChartController'
+    ],
+
+    launch: function() {
+        
+        // Gather information from FHEM to display status, devices, etc.
+        var me = this,
+            url = '../../../fhem?cmd=jsonlist&XHR=1';
+        
+        Ext.Ajax.request({
+            method: 'GET',
+            async: false,
+            disableCaching: false,
+            url: url,
+            success: function(response){
+                var json = Ext.decode(response.responseText);
+                FHEM.version = json.Results[0].devices[0].ATTR.version;
+                
+                Ext.each(json.Results, function(result) {
+                    //TODO: get more specific here...
+                    if (result.list === "DbLog" && result.devices[0].NAME) {
+                        FHEM.dblogname = result.devices[0].NAME;
+                    }
+                });
+                if (!FHEM.dblogname && Ext.isEmpty(FHEM.dblogname)) {
+                    Ext.Msg.alert("Error", "Could not find a DbLog Configuration. Do you have DbLog already running?");
+                } else {
+                    Ext.create("FHEM.view.Viewport");
+                }
+            },
+            failure: function() {
+                Ext.Msg.alert("Error", "The connection to FHEM could not be established");
+            }
+        });
+        
+    }
+});