How to inject services into RouteInitializerFn (new routing DSL)

Question

I\'m switching my app over to the new routing DSL. Specifically, I want to do something like this with preEnter:

Answer 1

I found a pretty cool solution to this problem. Turns out, if you define a call method on a class that satisfies a typedef, you can configure it as an implementation of the typedef. Very cool. Here is my solution:

class Routes
{
  final UserService _userService;

  Routes(this._userService);

  void call(Router router, ViewFactory views) 
  {
    views.configure({
      'chat': ngRoute(
          path: '/chat',
          preEnter: (RoutePreEnterEvent e) => e.allowEnter(this._userService.requireUserState(UserService.LOGGED_IN)),
          view: 'views/chat.html'
      ),

      'login': ngRoute(
          path: '',
          defaultRoute: true,
          view: 'views/login.html'
      )
    });
  }
}

and this is how it's configured within the module:

// old syntax
type(RouteInitializerFn, implementedBy: Routes);

// new syntax
bind(RouteInitializerFn, toImplementation: Routes);