bleeDev

<?php
function MYMODULE_map_mime(array $values) {
  $map = $values;
  $mimes = array(
    'application/pdf'=>'PDF',
    'application/msword'=>'Word Document',
    'application/vnd.ms-excel'=>'Excel',
  );
  $map = array();

bleeDev

<?php
function MYMODULE_facetapi_facet_info($searcher_info) {
  $facets = array();
  
  $facets['mime'] = array(
     'label' => t('Mime Type'),
     'description' => t('Filter by mime type.'),
     //indexed field from solr 
     'field' => 'ss_filemime',
     'map callback' => 'MYMODULE_map_mime',