Extending Date Class. WeekDay and Next WeekDay methods.

Date-extensions.rb

class Date

  # Extend Date Class with some custom methods

  # Returns the name of the week day.
  #
  # Date.today.weekday
  # -> 'Monday'
  def weekday
    self.strftime("%A")
  end

  # Returns the next weed day
  #
  # Date.today.next_weekday('Wednesday')
  # -> next wednesday from today.
  def next_weekday(day = nil)
    if day.is_a? String
      day ||= self.weekday
      wday = Date::DAYNAMES.index(day)

      if wday.present?
        pad = ((wday - self.wday) % 7)
        pad = 7 if pad == 0

        return self + pad.days
      end
    end

    self # should return nil?
  end

end