Bring responder from spree_core

lib/spree/responder.rb

@@ -0,0 +1,45 @@
+module Spree
+  class Responder < ::ActionController::Responder #:nodoc:
+
+    attr_accessor :on_success, :on_failure
+
+    def initialize(controller, resources, options={})
+      super
+
+      class_name = controller.class.name.to_sym
+      action_name = options.delete(:action_name)
+
+      if result = Spree::BaseController.spree_responders[class_name].try(:[], action_name).try(:[], self.format.to_sym)
+        self.on_success = handler(controller, result, :success)
+        self.on_failure = handler(controller, result, :failure)
+      end
+    end
+
+    def to_html
+      super and return if !(on_success || on_failure)
+      has_errors? ? controller.instance_exec(&on_failure) : controller.instance_exec(&on_success)
+    end
+
+    def to_format
+      super and return if !(on_success || on_failure)
+      has_errors? ? controller.instance_exec(&on_failure) : controller.instance_exec(&on_success)
+    end
+
+    private
+
+    def handler(controller, result, status)
+      return result if result.respond_to? :call
+
+      case result
+      when Hash
+        if result[status].is_a? Symbol
+          controller.method(result[status])
+        else
+          result[status]
+        end
+      when Symbol
+        controller.method(result)
+      end
+    end
+  end
+end