processable.rb

require 'active_support/concern'

module Processable
  extend ActiveSupport::Concern

  included do
    scope :processed, ->{ where processed: true }
    scope :unprocessed, ->{ where processed: false }
  end

  module ClassMethods
    # nothing here
  end

  def mark_as_processed!
    update_column :processed, true
  end
  
  def mark_as_unprocessed!
    update_column :processed, false
  end
  
  def status
    if processed?
      :processed
    else
      :unprocessed
    end
  end
  
  def unprocessed?
    !processed?
  end
end