<commit_before>///<reference path="../d.ts/DefinitelyTyped/socket.io/socket.io.d.ts"/>
///<reference path="../d.ts/DefinitelyTyped/async/async.d.ts"/>
///<reference path="../d.ts/DefinitelyTyped/underscore/underscore.d.ts"/>

import _ = require('lodash');
import async = require('async');

import Database = require('db/DatabaseInterface');

interface Subscription {
	sockets: Socket[];
	path: String;
}

class DataBaseAdapter {
	private db : Database.db;
	private subscriptions;

	constructor(db, subscriptions) {
		this.db = db;
		this.subscriptions = subscriptions;
	}

	set(req, socket: Socket) {
		var path = req.url;
		var value = req.value;

		this.updateParentVersions(path, () => {
			console.log('Saving data', path, value);

			this.db.set(path, value, (error) => {
				if(error) console.error(error);
				else this.notifySubscriptions(path);
			});
		});
	}

	update(req, socket: Socket) {

		var path = req.url;
		var value = req.value;

		this.updateParentVersions(path, () => {
			console.log('Saving data', path, value);

			this.db.update(path, value, (error) => {
				if(error) console.error(error);
				else this.notifySubscriptions(path);
			});
		});
	}

	get(req, socket: Socket) {
		var path = req.url;

		this.saveSubscription(path, socket);

		this.db.get(path, (err, value) => {

			if(err) console.error('Error reading from db', path);
			else {
				if(!req.data || (value && value.version > req.data.version) ) {
					socket.emit('data', {
						path: path,
						value: value
					});
				}
			}
		});
	}

	remove(req, socket: Socket) {
		this.updateParentVersions(req.path, () => {
			this.db.remove(req.path, (err) => {
				if(err) console.error('Remove error: ', err);
				else this.notifySubscriptions(req.path);
			});
		});
	}

	private updateParentVersions(path: string, callback: Function) {
		var newPath = "";
		var paths = path.split('/');
		paths.unshift("");
		var scope = this;

		console.log('Updating all parent versions for path', path);

		async.each(paths,
			function(p, callback) {
				newPath += newPath.length ? "/" + p : p;
				var cachedPath = newPath + "";<commit_msg>Add versioning when the client first connects, if the client has a newer version than the server, the server will take that version else the server will send down an updated version to the client<commit_after>///<reference path="../d.ts/DefinitelyTyped/socket.io/socket.io.d.ts"/>
///<reference path="../d.ts/DefinitelyTyped/async/async.d.ts"/>
///<reference path="../d.ts/DefinitelyTyped/underscore/underscore.d.ts"/>

import _ = require('lodash');
import async = require('async');

import Database = require('db/DatabaseInterface');

interface Subscription {
	sockets: Socket[];
	path: String;
}

class DataBaseAdapter {
	private db : Database.db;
	private subscriptions;

	constructor(db, subscriptions) {
		this.db = db;
		this.subscriptions = subscriptions;
	}

	set(req, socket: Socket) {
		var path = req.url;
		var value = req.value;

		this.updateParentVersions(path, () => {
			console.log('Saving data', path, value);

			this.db.set(path, value, (error) => {
				if(error) console.error(error);
				else this.notifySubscriptions(path);
			});
		});
	}

	update(req, socket: Socket) {

		var path = req.url;
		var value = req.value;

		this.updateParentVersions(path, () => {
			console.log('Saving data', path, value);

			this.db.update(path, value, (error) => {
				if(error) console.error(error);
				else this.notifySubscriptions(path);
			});
		});
	}

	get(req, socket: Socket) {
		var path = req.url;

		this.saveSubscription(path, socket);

		this.db.get(path, (err, value) => {

			if(err) console.error('Error reading from db', path);
			else {
				// If there is no value submitted from the client or the server version
				// is behind the client version, send down an updated version from the
				// server, else update the server with the client data.
				if(!req.value.value || (value && value.version > req.value.version) ) {
					socket.emit('data', {
						path: path,
						value: value
					});
				} else {
					this.set(req, socket);
				}
			}
		});
	}

	remove(req, socket: Socket) {
		this.updateParentVersions(req.path, () => {
			this.db.remove(req.path, (err) => {
				if(err) console.error('Remove error: ', err);
				else this.notifySubscriptions(req.path);
			});
		});
	}

	private updateParentVersions(path: string, callback: Function) {
		var newPath = "";
		var paths = path.split('/');
		paths.unshift("");
		var scope = this;

		console.log('Updating all parent versions for path', path);

		async.each(paths,
			function(p, callback) {
				newPath += newPath.length ? "/" + p : p;
				var cachedPath = newPath + "";
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