Stex/ar_mailer_revised

#
# Helper methods for the chosen email class
#

module ArMailerRevised
  module EmailScaffold

    extend ActiveSupport::Concern

    included do
      serialize :smtp_settings

      #Only emails which are to be sent immediately
      scope :without_delayed, lambda { where(:delivery_time => nil) }

      #All emails which are ready to be sent.
      #They are automatically sorted so that emails which already had a send attempt
      #will be last in the queue as they might fail again.
      scope :ready_to_deliver, lambda { where('delivery_time IS NULL OR delivery_time <= ?', Time.now).order('last_send_attempt ASC') }

      #All emails which are to be sent in the future
      scope :delayed, lambda { where('delivery_time > ?', Time.now) }

      #Applies a +limit+ to the finder if batch_size is set
      scope :with_batch_size, lambda { |batch_size|
        limit(batch_size) if batch_size
      }
    end

    #
    # @return [Boolean] +true+ if the system tried to send
    #   the email before.
    #
    def previously_attempted?
      last_send_attempt > 0
    end
  end
end