class EmailTemplate < ActiveRecord::Base
  TEXT_PLAIN = 1
  TEXT_HTML = 2
  BOTH = TEXT_PLAIN | TEXT_HTML

  def after_initialize
    if new_record?
      self.content_types ||= BOTH
    end
  end

  def plain_text?
    (content_types & TEXT_PLAIN) ? true : false
  end

  def plain_text=(v)
    content_types ^= TEXT_PLAIN if v ^ plain_text?
  end

  def html?
    (content_types & TEXT_HTML) ? true : false
  end

  def html=(v)
    content_types ^= TEXT_HTML if v ^ html?
  end

  def formats
    returning [] do |a|
      a << 'text/plain' if content_types & TEXT_PLAIN
      a << 'text/html'  if content_types & TEXT_HTML
    end
  end
end