REVISION CONTROL

lib/makeCommit.js

@@ -0,0 +1,48 @@
+var MyNode = require('../models/Node.js').MyNode; 
+var snapMoudule = require('../models/Snap.js'); 
+var MySnap = snapMoudule.MySnap; 
+var addSnap = snapMoudule.addSnap;
+var _ = require("underscore");  
+
+module.exports.makeCommit = makeCommit; 
+
+
+
+//http://stackoverflow.com/questions/750486/javascript-closure-inside-loops-simple-practical-example
+function createCallback(node, now){
+	return function(err,snapTimestamp){
+				console.log("\t\tSNAPTIMESTAMP"); 
+				console.log(snapTimestamp); 
+				console.log("\t\tsnapNode"); 
+				console.log(node); 
+
+				if(snapTimestamp.length == 0){//noSnaps in DB means MyNode is newNode. 
+					if(node.parents.length == 0){node.remove();}//(node was created and deleted before being committed)
+					else{addSnap(node, now);}
+					return; //just returns from callback, not from the _.each function. 
+				}
+
+				snapTimestamp = snapTimestamp[0].timestamp; 
+				if(snapTimestamp == node.timestamp){} //no edits have happened for this node. 
+				else{//edits have occurred, and we need to save them. 
+					if(node.parents.length == 0){
+						addSnap(node,now,1); //remove the node with no parents (from NodeCollection).
+					}
+					else{
+						addSnap(node, now); 
+					}
+				}//else
+			}//findSnapTimeStamp => saveSnap.
+}
+
+function makeCommit(){
+	var now = Date.now(); 
+	MyNode.find(function(err,nodes){
+		_.each(nodes, function(node){
+			console.log("NODE"); 
+			console.log(node)
+			MySnap.find({cur_id: node._id}, 'timestamp')
+			.sort({timestamp: -1}).limit(1).exec(createCallback(node, now));
+		});//.each
+	}); 
+}//function