simplest_auth.rb

module SimplestAuth
  module Model
    def self.included(base)
      adapters.each do |adapter|
        if adapter.registered?(base)
          include adapter
        end
      end
    end

    def self.adapters
      Adapters.constants.map { |c| SimplestAuth::Model::Adapters.const_get(c) }
    end

    module Adapters
      module ActiveRecord
        def registered?(base)
          # code to determine if ActiveRecord is being used
        end
      end

      module DataMapper
        def registered?(base)
        end
      end
    end
  end
end