dalpo/rails_admin_clone

require 'rails_admin/config/actions'
require 'rails_admin/config/actions/base'

module RailsAdmin
  module Config
    module Actions
      class Clone < Base
        RailsAdmin::Config::Actions.register(self)

        register_instance_option :member do
          true
        end

        register_instance_option :http_methods do
          [:get]
        end

        register_instance_option :controller do
          Proc.new do
            model_cloner  = RailsAdminClone::ModelCloner.new(@object)
            custom_method = model_config.clone_config.custom_method

            if custom_method.present?
              @object = model_cloner.method_clone(custom_method)
            else
              @object = model_cloner.default_clone
            end

            @authorization_adapter && @authorization_adapter.attributes_for(:new, @abstract_model).each do |name, value|
              @object.send("#{name}=", value)
            end

            if object_params = params[@abstract_model.to_param]
              @object.set_attributes(@object.attributes.merge(object_params))
            end

            respond_to do |format|
              format.html { render @action.template_name }
              format.js   { render @action.template_name, :layout => false }
            end
          end
        end

        register_instance_option :template_name do
          :new
        end

        register_instance_option :link_icon do
          'icon-copy fa fa-files-o'
        end

        register_instance_option :pjax? do
          false
        end
      end
    end
  end
end