Basic Object

notification_type.rb

class NotificationType
  attr_accessor :id, :load_id
  
  def initialize(id, load_id)
    self.id = id
    self.load_id = load_id
    check_valid_id
  end
  
  def description
    format(statuses[id], load_id)
  end
  
  private
  
  def statuses
    ['Description A - %s',
     'Description B - %s',
     'Description C - %s',
     'Description D - %s',
     'Description E - %s']
  end
  
  def check_valid_id
    return if id.instance_of?(Integer) && id >= 0 && id <= 9
    raise 'Invalid Notification Type Id'
  end
end