class SpudCalendar < ActiveRecord::Base
  has_many :spud_calendar_events, :dependent => :destroy
  validates_presence_of :title
  validates :identifier, :presence => true, :uniqueness => true

  before_validation :set_identifier

  def self.with_identifier(identifier)
    where(:identifier => identifier).first
  end

  def color
    modulo = (self.id-1) % COLORS.length
    return COLORS[modulo]
  end

  COLORS = [
    '4D854B',
    'f89406',
    'b94a48',
    '3a87ad',
    '999999',
    '333333'
  ]

private

  def set_identifier
    if identifier.nil? && title.present?
      self.identifier = title.parameterize.underscore
    end
  end

end