Coffeescript version of the simple page idle timer.

IdleTimer.coffee

class window.IdleTimer

	constructor: () ->
		@timer
		@timeIncrement = 1000
		@timeIdle = 0
		@timeMax = 10000
		@expired = false
		@interactionMethods = ['click','mousemove']

		if document.documentElement.hasOwnProperty('ontouchmove')
			@interactionMethods.push('touchmove')

	start: () ->
		@timeIdle = 0
		@timer = setInterval (=> @checkIdleTime()), @timeIncrement
		for method in @interactionMethods
			document.addEventListener(method, => @resetTimer())

	stop:() ->
		clearInterval(@timer)
		for method in @interactionMethods
			document.removeEventListener(method, => @resetTimer())

	checkIdleTime: () ->
		@timeIdle += @timeIncrement
		if typeof @tickCallback is 'function' and @timeIdle <= @timeMax
			@tickCallback()

		if @expired is off and @timeIdle > @timeMax
			@expired = on

			if typeof @expiryCallback is 'function'
				@expiryCallback()

	resetTimer:() ->
		if @expired is on
			@expired = off
			if typeof @awakeCallback is 'function'
				@awakeCallback()

		@timeIdle = 0