lib/popcorn: introduce Router::use_after service

So the user can force some middlewares to be called after the other handlers.

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>

diff --git a/lib/popcorn/pop_handlers.nit b/lib/popcorn/pop_handlers.nit
index 897b3ba..1c20b67 100644 (file)
--- a/lib/popcorn/pop_handlers.nit
+++ b/lib/popcorn/pop_handlers.nit
@@ -310,6 +310,9 @@ class Router
        # List of handlers to match before every other.
        private var pre_handlers = new Map[AppRoute, Handler]
 
+       # List of handlers to match after every other.
+       private var post_handlers = new Map[AppRoute, Handler]
+
        # Register a `handler` for a route `path`.
        #
        # Route paths are matched in registration order.
@@ -326,10 +329,20 @@ class Router
                pre_handlers[route] = handler
        end
 
+       # Register a post-handler for a route `path`.
+       #
+       # Posthandlers are matched after every other handlers in registrastion order.
+       fun use_after(path: String, handler: Handler) do
+               var route = build_route(handler, path)
+               post_handlers[route] = handler
+       end
+
        redef fun handle(route, uri, req, res) do
                if not route.match(uri) then return
                handle_pre(route, uri, req, res)
                handle_in(route, uri, req, res)
+               handle_post(route, uri, req, res)
+       end
 
        private fun handle_pre(route: AppRoute, uri: String, req: HttpRequest, res: HttpResponse) do
                for hroute, handler in pre_handlers do
@@ -344,6 +357,12 @@ class Router
                end
        end
 
+       private fun handle_post(route: AppRoute, uri: String, req: HttpRequest, res: HttpResponse) do
+               for hroute, handler in post_handlers do
+                       handler.handle(hroute, route.uri_root(uri), req, res)
+               end
+       end
+
        private fun build_route(handler: Handler, path: String): AppRoute do
                if handler isa Router or handler isa StaticHandler then
                        return new AppGlobRoute(path)