complicated UI controll designed with if/else

DateWidget.coffee

# no bueno
class DateWidget
  constructor: ->
    @firstLevel = true
    @fromDate = null
    @toDate = null
    
 
  fillFromDate: ->
    if @firstLevel
      #initialize fromDate and toDate day selects
    else if @fromDate
      #do some
    else if @toDate
      #do something else