Add ControllerSetup from spree_api as it is used in spree/api/base_controller

lib/spree/api/controller_setup.rb

@@ -0,0 +1,33 @@
+require 'spree/api/responders'
+
+module Spree
+  module Api
+    module ControllerSetup
+      def self.included(klass)
+        klass.class_eval do
+          include AbstractController::Rendering
+          include AbstractController::ViewPaths
+          include AbstractController::Callbacks
+          include AbstractController::Helpers
+
+          include ActiveSupport::Rescuable
+
+          include ActionController::Rendering
+          include ActionController::ImplicitRender
+          include ActionController::Rescue
+          include ActionController::MimeResponds
+          include ActionController::Head
+
+          include CanCan::ControllerAdditions
+          include Spree::Core::ControllerHelpers::Auth
+
+          prepend_view_path Rails.root + "app/views"
+          append_view_path File.expand_path("../../../app/views", File.dirname(__FILE__))
+
+          self.responder = Spree::Api::Responders::AppResponder
+          respond_to :json
+        end
+      end
+    end
+  end
+end