Krdytkyu

I have a node tree structure that renders database information in the browser using vis.js - see this. I won't use the actual table entities, but suppose it's something like:

building

floor

office

room

In particular, I am wanting to write an object that holds an array of all the node details. Each node contains the following data:

id

description

short_description

date_inserted

date_updated

db_primary_key(only upon initialisation)

Each edge holds a relation linking the id of two nodes like this:

 {from:'foo',to:'bar'}

The node tree clearly represents the underlying foreign key relations in a database. A building (root node) has 1 or more floors (children of the top node), a floor has 1 or more offices (grandchildren of the top node), an office has 1 or more rooms (great-grandchildren of the top node).

Vis.js graph has an edit function that allows the user to create nodes, update their position and I've extended this to store custom attributes (like the short_description). I'm wanting to keep track of the changes made to the data in an object like this:

var NodeTree = {

        collection:{};//all node objects

        toCreate:{b:,f:,o:,r:},//newly created nodes - use ids or the object itself?

        toEdit:{b:,f:,o:,r:},//edited attribute of node - use ids or the object itself?

        toDelete:{b:,f:,o:,r:},//deleted node from tree - use ids or the object itself?

        create: function(type,node){

            this.toCreate[type].push(node);

        }//function to add created node?

    }



  var NodeEdges = {

        collection:;

        toCreate:{b:,f:,o:,r:},

        toEdit:{b:,f:,o:,r:},

        toDelete:{b:,f:,o:,r:},

        create: function(type,node){

            this.toCreate[type].push(node);

        }

    }

The idea is that the user can make changes to the Node Tree and then post these to a server that will update the database.

To put it succinctly, I have a hashmap of nodes and an array of edges written in JavaScript. I want to be able to keep a track of these changes so I can post them to the server. How do I best go about writing this in an OO way using JavaScript? I'm hoping to not have to post the entire NodeTree and NodeEdge objects.