The Holmes Blog

2.minutes.ago.after? Time.now # =>; false

Time.now.before? 2.hours.from_now # => true

module BeforeAndAfter

  LEFT_SIDE_LARGER  = 1
  RIGHT_SIDE_LARGER = -1
  EQUAL             = 0
  ACCEPTABLE_SWITCH_VALUES = [ :before , :after ]

  def before?(input_time)
    return comparison(:before, input_time)
  end

  def after?(input_time)
    return comparison(:after, input_time)
  end

private

  def comparison(switch, input_time)

    raise ArgumentError, "bad comparison switch" unless ACCEPTABLE_SWITCH_VALUES.include? switch

    comparison_result = self <=> input_time

    case comparison_result
      when LEFT_SIDE_LARGER
        case switch
          when :before
            return false
          when :after
            return true
        end
      when RIGHT_SIDE_LARGER
        case switch
          when :before
            return true
          when :after
            return false
        end
      when EQUAL
        return false
    end
  end
end

Time.send :include , BeforeAndAfter