Tower : Localizing with an unanticipated dictionary

Question

I'm working with the Tower library for i18n and l10n in my web application.

I have the problem of having to localize "just-in-time", i.e with an unanticipated dictionary, and in particular unanticipated supported locales.

I receive HTTP request, from which I can extract the accepted locales in preference order, e.g :

[:de :en-UK :en :fr-FR :fr]

On the other hand, I have to localize from micro-dictionaries which are fetched from a database, in the form : {:fr "En Français" :en "In English" :en-Uk "In English from UK"}

What I would like to do in my program is to find the best matching translations from these 2 elements (in the example, it is :en-UK; note that I may not know in advance that :de is unavailable).

I haven't found a way to do that with the Tower library (and I'd like to avoid reinventing the wheel).

Does anyone know how I might proceed?

Thanks in advance!

Answer 1

Just added native support for arbitrary locale fallbacks in Tower v2.1.0-SNAPSHOT, as per discussion here: https://github.com/ptaoussanis/tower/issues/43#issuecomment-42014418

So it'll now be possible to request a translation like (t [:fr-FR :en-US] :example/foo).

Cheers! :-)

Answer 2

You could get a sequence of keys from the map, get all the values that are common to both sequences, and then choose whatever one is preferred based on whatever logic fits your requirements.