Optional multi-segment path

[smucode]

I have a set of pages that can either be accessed in the context of a user, or not. A simplified example would be that I have a Vehicles page. Vehicles are available for all users. Adding vehicles would be done at vehicles._index.tsx, editing at vehicles.edit.tsx and so on.

When I'm looking at a user users.$userId._index.tsx I'd want the user to still list/edit/add vehicles. If I simply redirect them to vehicles._index.tsx I lose the context of the user.

There are many solutions to what I'm trying to achieve. I could pass the userId as a querystring parameter, but then i'd have to remember to handle that in all the vehicle pages and pass it from _index to edit etc.

Another option is to mirror all the vehicle routes users.$userId.vehicles._index.tsx and re-export the corresponding view/loader/action functions. But that's just as brittle as the query string option.

I guess ideally I'd be able to express the vehicle routes as such (users.$userId.)vehicles._index.tsx where I make the entre user path segment optional. All I need to keep in mind with this approach is to handle the optional userId, and redirect accordingly.

Link to the discord chat where I asked for help about this initially: https://discord.com/channels/770287896669978684/1126608389426909184/1126608389426909184