Middleware object type inference

[MutabaziAlleluia]

• I'm submitting a ... [x] feature request

• Summary This handler is well designed and I am using it in more than 3 projects. Using TS, I am trying to infer the type of middleware without success;

  const router = new RouterBuilder();
  router.use(() => ...).get(req => req.middleware );

Is there a way that it can be handled? If not, I would suggest to add the ability of adding use in the builder constructor. That way the entire router can have access to the return type of each use middleware:

const router = new RouterBuilder({ use: [() => ...] });

[MutabaziAlleluia]

Currently I am handling it with (not so friendly when you have many routes and middlewares) hacks like this:

const abcMiddleware = async () => ({ abc: true });
type ABC = Awaited<ReturnType<typeof abcMiddleware>>;

router.use(abcMiddleware).get<{}, ABC>(
  async ( req, res ) => ({
    abc: req.middleware.abc,
  })
);

[Howard86]

hmm this is a good feature that we should be able to use with use & inject think its doable with current implementation, let me have a think

[Howard86]

@MutabaziAlleluia I tried a few ways to tweak with typescript definition, but still no lucks

Feel free to open a PR?