Added support for custom renderers.

lib/errawr/rails.rb

@@ -3,13 +3,22 @@
 require 'errawr/http'
 
 require 'errawr/rails/renderable'
-require 'errawr/rails/json'
+require 'errawr/rails/renderers/json'
 require 'errawr/rails/version'
 
 module Errawr
   module Rails
     def self.included(base)
       base.send(:include, Errawr::ClassMethods)
     end
+
+    def self.with_renderer(renderer)
+      mod = Module.new
+      mod.define_singleton_method :included do |object|
+        object.send(:include, Errawr::Rails)
+        object.send(:include, Errawr::Rails::Renderable.render_with(renderer))
+      end
+      mod
+    end
   end
 end

lib/errawr/rails/renderable.rb

@@ -1,16 +1,22 @@
 module Errawr
   module Rails
     module Renderable
-      def self.included(base)
-        base.send(:include, Errawr::Rails) unless base.ancestors.include?(Errawr::Rails)
-        base.send(:include, ActiveSupport::Rescuable)
-        base.class_eval do
-          rescue_from Errawr::Error, with: :render_errawr
+      def self.render_with(handler)
+        mod = Module.new
+        mod.define_singleton_method :included do |object|
+          object.class_eval do
+            object.const_set(:ERRAWR_HANDLER, handler)
+            rescue_from Errawr::Error, with: :render_errawr
+
+            private
+            def render_errawr(error)
+              handler =  self.class.const_get(:ERRAWR_HANDLER)
+              self.status = error.context[:http_status] || 500
+              render handler.new.call(error)
+            end
+          end
         end
-      end
-
-      def render_errawr
-        raise 'Method render_errawr not defined...'
+        mod
       end
     end
   end

lib/errawr/rails/renderers/json.rb

@@ -0,0 +1,16 @@
+module Errawr
+  module Rails
+    module Renderers
+      class JSON
+        def call(error)
+          {
+            json: {
+              error: error.context[:name] || error.key,
+              description: error.message
+            }.merge(error.metadata)
+          }
+        end
+      end
+    end
+  end
+end

spec/dummy/app/controllers/metadata_controller.rb

@@ -1,5 +1,5 @@
 class MetadataController < ApplicationController
-  include Errawr::Rails::JSON
+  include Errawr::Rails.with_renderer(Errawr::Rails::Renderers::JSON)
 
   def index
     register!(:dummy_error, message: 'Dummy Message', metadata: { developer: 'Anthony' })

spec/dummy/app/controllers/renderable_controller.rb

@@ -1,5 +1,5 @@
 class RenderableController < ApplicationController
-  include Errawr::Rails::JSON
+  include Errawr::Rails.with_renderer(Errawr::Rails::Renderers::JSON)
 
   def index
     error!(:bad_request)

spec/json_spec.rb

@@ -1,6 +1,6 @@
 require 'spec_helper'
 
-describe Errawr::Rails::JSON do
+describe Errawr::Rails::Renderers::JSON do
   context 'RenderableController', type: :controller do
     controller(RenderableController) do
       extend RSpec::Rails::ControllerExampleGroup::BypassRescue