Routes#show: Use RouteDecorator#action_links to render header links

Instead of defining the header links in the view, get them from our
decorator so we can reuse them. Need to wrap `@route` in the decorator
in the controller and pass it the necessary context in order for it to
be able to properly build links.

Move `Chouette::RouteDecorator` to the top level app/decorators/
directory and remove it from the `Chouette` namespace. I had put it
there to make it more similar to our model directory layout, but Draper
isn't intelligent enough to look in subdirectories of `decorators` when
using the `ActiveRecord::Base#decorate` method. Otherwise I suppose I
could do `Chouette::RouteDecorator.decorate(@route)`, but that seemed
not as clean since it doesn't take advantage of the default behaviour of
Draper. Now going to have to do this for the other decorators.

Refs #3479

1 files changed, 6 insertions, 0 deletions

diff --git a/app/controllers/routes_controller.rb b/app/controllers/routes_controller.rb
index 73febc4b9..786bd57cc 100644
--- a/app/controllers/routes_controller.rb
+++ b/app/controllers/routes_controller.rb
@@ -42,6 +42,12 @@ class RoutesController < ChouetteController
     end
 
     show! do
+      @route = @route.decorate(context: {
+        referential: @referential,
+        line: @line,
+        route_sp: @route_sp
+      })
+
       build_breadcrumb :show
     end
   end