module TimeHelper
  def christmastime?
    timehelper([[Time.new(Time.now.year,12,6),Time.new(Time.now.year,12,31)]])
  end

  def studytime?
    year = Time.now.year
    timehelper([
      [Time.new(year,12,14), Time.new(year,12,31)],
      [Time.new(year,1,1), Time.new(year,2,7)],
      [Time.new(year,5,15), Time.new(year,6,30)],
      [Time.new(year,8,5), Time.new(year,9,10)],
    ])
  end

  def timehelper(ranges)
    ranges.any? {|range| periodhelper(*range)}
  end

  def periodhelper(startdate, enddate)
    Time.now.between?(startdate, enddate)
  end
end