Question about generating urls with dispatch-rules from imported modules

Dear Racket community,

First of all I want to say hello since this is my first post here.

I have a question about using the url dispatch library:
https://docs.racket-lang.org/web-server/dispatch.html

More specifically about the url-generation function in the context of
inter-module dependencies.

Let's say in `routing.rkt` I define some request handlers and then map
them to urls using dispatch-rules.

The request handlers call functions from another module that are
responsible for generating the x-expressions (let's call this module
`templates.rkt`). The x-expressions need to include hyperlinks to urls
defined via dispatch-rules in main.rkt, i.e., call the url-generating
function.

The url-generating function, in turn, needs to be provided the request
handler as the first argument.

That means that the xexpr-generating function needs to have access to
the url-generating function and all the request handlers it might
need to include hyperlinks to, or it may need to be provided with all
the generated urls in advance.

Something like this wouldn't work if render-post needed to generate a url:

;; A request handler associated with a url
(define (single-post-view request post-id)
  (response/xexpr (render-post (post-id))) ;; render-post is in another file/module

I wouldn't want to make templates.rkt require routing.rkt (I'm not sure
this is technically possible to have modules depend on each other like
that), nor would I want to provide all the request handlers as arguments
to `render-post`. I also thought about putting the url-generating
function into a parameter, but `render-post` also needs access to the
request handlers.

What approach should I take?

--
Yury Bulka
https://mamot.fr/@setthemfree
#NotOnFacebook

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