date facet for cck field

I am currently (successfully) using apachesolr for project with custom facet on cck date field.
As the code that I've made is done inside apachesolr module I want to make it separate module (so I can update apachesolr without patchig the code again)

I am using hook for (standard) cck fields hook_apachesolr_cck_fields_alter(&$mappings) and this is enough to get facet.
But to make it work like date facets (for node created and node changed fields) I had to change
function apachesolr_search_add_facet_params(&$params, $query)
and
function apachesolr_search_block($op = 'list', $delta = 0, $edit = array())

There is one more change that I've done. It is in function apachesolr_search_date_range($query, $facet_field) and it is handling dates that are in ISO format (string) in database.

I am attaching diff.

Is there support for additional cck fields that will act like date facets planned (and when)? Is there some plan that I should consider when trying to make support for date facets from cck fields?

I was thinking maybe to automaticly consider using funcionst for date facets if cck field is date or datetime or timestamp type...

Mihajlo
Kontrola