Fixes #4189@4h Route Duplication

* Duplication of Route is triggered by link and UI forwarded to edit of duplicatee

     - Changing route, only POST duplicate_referential_line_route --> RoutesController#duplicate
     - Removing route       GET  duplicate_referential_line_route --> RoutesController#duplicate
     - Removing controller action RoutesController#post_duplicate

* Link in Route Decorator depends on new policy RoutePolicy#decorate?

* Adapting specs

1 files changed, 12 insertions, 0 deletions

diff --git a/app/decorators/route_decorator.rb b/app/decorators/route_decorator.rb
index 484c3db04..46cb6cd5f 100644
--- a/app/decorators/route_decorator.rb
+++ b/app/decorators/route_decorator.rb
@@ -58,6 +58,18 @@ class RouteDecorator < Draper::Decorator
       )
     end
 
+    if h.policy(object).duplicate?
+      links << Link.new(
+        content: h.t('routes.duplicate.title'),
+        href: h.duplicate_referential_line_route_path(
+          context[:referential],
+          context[:line],
+          object
+        ),
+        method: :post
+      )
+    end
+
     links
   end
 end