SYNCING bugs fixed -- MesageQueue+SynchronousChecks

lib/MessageQueue.js

@@ -0,0 +1,90 @@
+var Node = require("../models/Node.js"); 
+
+var MessageQueue = []; 
+
+module.exports.iterateQueue = function(){
+  // console.log("iteratingQueue"); 
+  MessageQueue.shift(); //remove the finished operation. 
+  if(MessageQueue.length == 0){return;}
+
+  var nextOperation = MessageQueue[0]; 
+  executeOperation(nextOperation); 
+}
+
+//queueLength needs to be != 0 if there's an operation occuring. 
+module.exports.queueOrDo = function(operation){
+  if(MessageQueue.length == 0){
+    MessageQueue.push(operation); 
+    executeOperation(operation); 
+  }
+  else{
+    // console.log("QUEUE BEING USED!!!"); 
+    MessageQueue.push(operation); 
+  }
+}
+
+
+
+
+
+
+function executeOperation(operation){
+  var type = operation[0]; 
+  var data = operation[1]; 
+  var socket = operation[2]; 
+
+  switch(type){
+    case "newNode": 
+      addNode(data, socket); break;
+    case "removeNode":
+      removeNode(data, socket); break;
+    case "movedNode": 
+      moveNode(data, socket); break;
+    default: 
+      break;
+  }
+}
+
+
+function moveNode(data, socket){
+    // var ids = [thisModel.get("_id"), oldParModel.get("_id"), newParModel.get("_id")];
+    // var arrays = [thisModel.get("parents"), oldParModel.get("children"), newParModel.get("children")];
+    // var indices = [dragIndex, dropIndex];
+    // var data = [ids, arrays, indices, CurrentUser];
+
+    Node.moveNode(data[0], data[1],data[3]._id);
+}
+
+
+function removeNode(data, socket){
+    var thisId = data[0];
+    var thisIndex = data[1];
+    var parId = data[2];
+    var author = data[3];
+    // data[3] = null; //improve efficiency. 
+    
+    Node.removeNode(thisId, thisIndex, parId, author._id);
+}
+
+
+//need to broadcast parentArray. 
+function addNode(data, socket){
+  var modelJson = data[1]; //(includes the negative ID to find later);
+  var parId = data[0][0];
+  var newIndex = data[0][1];
+  var Author = data[2]; 
+
+  var now = Date.now();
+
+  var callback = function(err, instance, now){
+    socket.emit("updateReceived", [modelJson._id ,instance, data[0]]); 
+    socket.broadcast.emit("newNode", [ [parId,newIndex]  , instance ]);
+
+    
+    Node.updateParent(parId, instance._id ,newIndex, now );
+  }
+
+  // console.log("newNode"); 
+  Node.addNode(modelJson.text, modelJson.children, modelJson.parents, modelJson.author._id ,callback);
+  
+}