[feature]: Add ability to assign routes to variables

[bioform]

It would be good to have the ability to assign routes to variables...
Something like:

huma.Get(api, "/confirm/{token}", userapi.ConfirmEmailHandler).AssignTo(&route.ConfirmEmail)

// and use it like
emailConfirmationLink := baseUrl + route.ConfirmEmail(user.EmailConfirmationToken)
SendEmailConfirmation(user.Name, emailConfirmationLink)

[bioform]

Even more general way:

huma.Get(api, "/confirm/{token}", userapi.ConfirmEmailHandler).AssignTo(&route.ConfirmEmail)

// and use it like
emailConfirmationLink := baseUrl + route.ConfirmEmail.Path(user.EmailConfirmationToken)
SendEmailConfirmation(user.Name, emailConfirmationLink)

// or/and
emailConfirmationLink := route.ConfirmEmail.Url(baseUrl, user.EmailConfirmationToken)
SendEmailConfirmation(user.Name, emailConfirmationLink)

[danielgtaylor]

@bioform is this feature request mostly about rendering URLs? It seems like you could probably use a third-party URL template rendering library for this, something like:

const ConfirmEmail = "/confirm/{token}"

huma.Get(api, ConfirmEmail, userapi.ConfirmEmailHandler)

emailConfirmationLink := urltemplate.Render(ConfirmEmail, map[string]string{"token": user.EmailConfirmationToken})

Is there a reason you need this in the core Huma library instead? If you don't want an additional dependency you could write a quick/simple string replace implementation.

func Render(template string, params map[string]string) string {
  for k, v := range params {
    template = strings.ReplaceAll(template, "{" + k + "}", v)
  }
  return template
}