##
# Adds sending email through an ActiveRecord table as a delivery method for
# ActionMailer.
#

class ActionMailer::Base
  adv_attr_accessor :priority

  def create_mail_with_priority
    create_mail_without_priority
    @mail.priority = self.priority
    @mail
  end

  alias_method_chain :create_mail, :priority

  ##
  # Set the email class for deliveries. Handle class reloading issues which prevents caching the email class.
  #
  @@email_class_name = 'Email'

  def self.email_class=(klass)
    @@email_class_name = klass.to_s
  end

  def self.email_class
    @@email_class_name.constantize
  end

  ##
  # Adds +mail+ to the Email table.  Only the first From address for +mail+ is
  # used.

  def perform_delivery_activerecord(mail)
    destinations = mail.destinations
    mail.ready_to_send
    sender = (mail['return-path'] && mail['return-path'].spec) || mail.from.first
    destinations.each do |destination|
      self.class.email_class.create :mail => mail.encoded, :to => destination, :from => sender, :priority => mail.priority || 0
    end
  end
end