module ActiveAdmin
  module BatchActions
    module Controller

      # Controller Action that get's called when submitting the batch action form
      def batch_action
        if selected_batch_action
          selected_ids = params[:collection_selection]
          selected_ids ||= []
          instance_exec selected_ids, &selected_batch_action.block
        else
          raise "Couldn't find batch action \"#{params[:batch_action]}\""
        end
      end

      protected

      def selected_batch_action
        return unless params[:batch_action].present?
        active_admin_config.batch_actions.select { |action| action.sym == params[:batch_action].to_sym }.first
      end

    end
  end
end