created a folder structure in node

node/db/PadManager.js

@@ -0,0 +1,63 @@
+/**
+ * The Pad Manager is a Factory for pad Objects
+ */
+
+/*
+ * 2011 Peter 'Pita' Martischka
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var Changeset = require("./Models/Pad");
+
+/**
+ * A Array with all known Pads
+ */
+globalPads = [];
+
+/**
+ * Returns a Pad Object with the callback
+ * @param id A String with the id of the pad
+ * @param {Function} callback 
+ */
+exports.getPad = function(id, callback)
+{    
+  var pad = globalPads[id];
+  
+  //return pad if its already loaded
+  if(pad != null)
+  {
+    callback(null, pad);
+  }
+  //try to load pad
+  else
+  {
+    pad = new Pad(id);
+    
+    //initalize the pad
+    pad.init(function(err)
+    {
+      if(err)
+      {
+        callback(err, null);
+      }
+      else
+      {
+        globalPads[id] = pad;
+        callback(null, pad);
+      }
+    });
+  }
+  
+  //globalPads[id].timestamp = new Date().getTime();
+}