class Chronic::RepeaterHour

def this(pointer = :future)
  super
  case pointer
  when :future
    hour_start = Chronic.construct(@now.year, @now.month, @now.day, @now.hour, @now.min + 1)
    hour_end = Chronic.construct(@now.year, @now.month, @now.day, @now.hour + 1)
  when :past
    hour_start = Chronic.construct(@now.year, @now.month, @now.day, @now.hour)
    hour_end = Chronic.construct(@now.year, @now.month, @now.day, @now.hour, @now.min)
  when :none
    hour_start = Chronic.construct(@now.year, @now.month, @now.day, @now.hour)
    hour_end = hour_start + HOUR_SECONDS
  end
  Span.new(hour_start, hour_end)
end