API v1 navigation endpoint

app/controllers/api/v1/navigations_controller.rb

@@ -0,0 +1,24 @@
+class Api::V1::NavigationsController < Api::V1::BaseController
+
+  def show
+    # we don't use active_model_serializers here, because source is a Hash
+    render json: { navigation: transform(navigation) }
+  end
+
+  private
+
+  def navigation
+    render_navigation(renderer: :json, as_hash: true)
+  end
+
+  def transform(items)
+    items.map do |item|
+      r = {}
+      r[:name] = item[:name]
+      r[:url] = request.base_url + item[:url] if item[:url] != '#'
+      r[:items] = transform(item[:items]) if item[:items]
+      r
+    end
+  end
+
+end

config/routes.rb

@@ -247,6 +247,7 @@
       namespace :v1 do
         resource :user, only: [:show]
         resource :config, only: [:show]
+        resource :navigation, only: [:show]
       end
     end