Document watch!!!

see.js

/*

var see = require('mongose-watch');
var Player = new Schema({ });
var Game = new Schema({ });
Player.plugin(watch() );

var watchingPlayer = Plaver.findById( MyID ).watch( "_id" );

watchingPlayer.start( function (err, doc){
	console.log("Player :");
	console.log(doc);
	watchingPlayer.stop(function(){
		console.log('Close the watch!');
	});
});

var watchingGame = Plaver.find().watch( new Date() );

watchingGame.start( function (err, games){
	console.log("Player :");
	console.log(games);
	watchingGame.stop();
});

Plaver.find().watch( new Date(), function (start, stop){
	this.start(function(err, docs){
		console.log("Async :");
		console.lgg(docs);
		stop(function(){
			console.log("Stop");
		});
	});
});

*/


var Query = require('mongoose').Query;
var _ = require('underscore');

module.exports = exports = function( label ){
	var self = {
		label : label || "lastMod" ,
		field : {}
	};
	Query.prototype.watch = function (){
		var sleft = {};
		for (var i = arguments.length - 1; i >= 0; i--) {
			if( _.isString(arguments[i]) )
				sleft.label = arguments[i];
			if( _.isDate(arguments[i] ) )
				sleft.time = arguments[i];
			if( _.isFunction(arguments[i] ) )
				sleft.callback = arguments[i];
		}
		sleft.label = sleft.label || self.label;
		sleft.time = sleft.time || new Date();
		sleft.query = sleft.label === '_id' ? this : this.where( sleft.label ).gte( sleft.time );
		sleft.timer = null;
		this.start = function ( times, cb ){
			if( !_.isFunction(times) && !_.isFunction( cb ) ) throw new Error('Is not a function');
			var callback = _.isFunction(times) ? times : cb;
			sleft.timer = setInterval( function(){
				sleft.query.exec('find', callback);
			}, _.isNumber(times) ? times : 350 );
		};
		this.stop = function ( cb ){
			clearInterval(sleft.timer);
			sleft.timer = null;
			if( _.isFunction(cb) ) return cb();
		};

		return sleft.callback ? sleft.callback( this.start, this.stop ) : { start : this.start, stop : this.stop };

	};

	return function watch (schema, options) {
		self.field[ self.label ] = {
			type : Date,
			default : Date.now,
			required : true
		};

		schema.add(self.field);

		schema.pre('save', function (next) {
			this[ self.label ] = new Date();
			next();
		});
	};
};

https://github.com/alejonext/mongoose-watch