public function dispatch(Route $route, Request $request = null)
    {
        $context = $this->context;

        if (empty($this->context) && !empty($request)) {
            // If we have no context, but do have a request, prepare a context to store path variables in.
            // Otherwise routing path variables would be lost for no good reason.
            $context = new Context();
            $context->registerInstance($request);
        }

        if (!empty($context)) {
            // If we have a context, ensure that the route is made available in it.
            $context->registerInstance($route);

            if (!empty($request)) {
                // If we have a request, map the path variables and pass them to the context as primitive types by name.
                // This will allow us to inject info from a route e.g. "/view/$userId" to a $userId variable.
                $pathVariables = VariableUrl::extractUrlVariables($request->getRequestUri(), $route->getPattern());

                foreach ($pathVariables as $name => $value) {
                    $context->registerVariable($name, $value);
                }
            }
        }

        return $route->action($context);
    }