Help-Search By Product Filter

re: app/functions/fn.search.php

Does anyone know how to add native cs-cart search for product filters? (all or specific ones)

I've searched the hook DB, but can't figure out which hook to use for product filters or features.

I think it's "get_product_filters_pre"... and if it is, I don't know the correct way to write the SQL reference and what parms are available.

Please check the fn_get_filters_products_count function

app/functions/fn.catalog.php