Finds the date shifted by 'days' workdays. (Accept negative numbers too)

workdays_delta.rb

def self.workdays_delta(days)
  # Finds the date shifted by 'days' workdays.
  current_day = Date.today
  weekend = [6, 7]
  counter = days.abs
  while counter > 0
    if days > 0
      current_day += 1.day else current_day -= 1.day end

    if not weekend.include? current_day.cwday and not Holiday.where(holiday_date: current_day).first
      counter -= 1
    end
  end
  current_day
end