replace_method_with_method_object.rb

# An example call would now be:
#  year = TimeSetter.new(367).calculate_current_year
# rather than:
#  year = TimeSetter.calculate_current_year(367)
class TimeSetter
  ORIGIN_YEAR = 1980
  def initialize(days_since_origin)
    @year = ORIGIN_YEAR
    @days_remaining = days_since_origin
  end
  def calculate_current_year
    while (@days_remaining > 365) do
      if leap_year?
        peel_off_leap_year!
      else
        peel_off_regular_year!
      end
    end
    return @year
  end
  private
  def peel_off_leap_year!
    if (@days_remaining >= 366)
      @days_remaining -= 366 ; @year += 1
    end
  end
  def peel_off_regular_year!
    @days_remaining -= 365 ; @year += 1
  end
  def leap_year?
    @year % 400 == 0 ||
      (@year % 4 == 0 && @year % 100 != 0)
  end
end