plugins/coders/facetapi_pretty_paths_coder_taxonomy_pathauto.inc

   1 <?php
   2
   3 /**
   4  * @file
   5  * A taxonomy specific coder based on path aliases of terms.
   6  *
   7  * This handler reuses the path aliases of terms and hence avoids term ids in
   8  * the facet URLs. It requires the default pattern for taxonomy terms
   9  * ([term:vocabulary]/[term:name]), which can be configured at
  10  * admin/config/search/path/patterns. The alias of [term:name] will be reused
  11  * and combined with the facet alias ([facet:alias]/[term:name]).
  12  */
  13
  14 /**
  15  * Taxonomy pathauto specific implementation of FacetApiPrettyPathsCoder.
  16  */
  17 class FacetApiPrettyPathsCoderTaxonomyPathauto extends FacetApiPrettyPathsCoderDefault {
  18
  19   /**
  20    * Taxonomy pathauto special case: <facet alias>/<term-name alias>
  21    *
  22    * @see FacetApiPrettyPathsCoderDefault::encodePathSegment()
  23    */
  24   public function encodePathSegment(array $args) {
  25     $voc_alias = $this->getVocabularyPathAlias($args['facet'], $args['adapter']);
  26     if ($voc_alias) {
  27       if ($term = taxonomy_term_load($args['segment']['value'])) {
  28         // Get the alias ([term:vocabulary]/[term:name]) for this term and
  29         // extract the term:name part.
  30         $alias = drupal_lookup_path('alias', 'taxonomy/term/' . $term->tid);
  31         if ($alias) {
  32           $parts = explode('/', $alias);
  33           if (count($parts) == 2) {
  34             $args['segment']['value'] = $parts[1];
  35           }
  36         }
  37       }
  38     }
  39     return parent::encodePathSegment($args);
  40   }
  41
  42   /**
  43    * Taxonomy pathauto special case: <facet alias>/<term-name alias>
  44    *
  45    * @see FacetApiPrettyPathsCoderDefault::decodePathSegmentValue()
  46    */
  47   public function decodePathSegmentValue(array $args) {
  48     $voc_alias = $this->getVocabularyPathAlias($args['facet'], $args['adapter']);
  49     if ($voc_alias) {
  50       // Rebuild the term alias, get the source (taxonomy/term/[term:tid]) and
  51       // extract the term id.
  52       $source = drupal_lookup_path('source', $voc_alias . '/' . $args['value']);
  53       if ($source) {
  54         $exploded = explode('/', $source);
  55         if (count($exploded) == 3) {
  56           $args['value'] = $exploded[2];
  57         }
  58       }
  59     }
  60     return parent::decodePathSegmentValue($args);
  61   }
  62
  63   /**
  64    * Helper function that returns the path alias for a vocabulary.
  65    */
  66   private function getVocabularyPathAlias($facet_info, $adapter) {
  67     static $aliases = array();
  68     if (!isset($aliases[$facet_info['name']])) {
  69       $aliases[$facet_info['name']] = FALSE;
  70       $facet_settings = $adapter->getFacetSettingsGlobal($facet_info);
  71       $voc = taxonomy_vocabulary_machine_name_load($facet_settings->settings['pretty_paths_taxonomy_pathauto_vocabulary']);
  72       if ($voc && module_exists('pathauto')) {
  73         // Needed, as of http://drupal.org/node/907578#comment-5564008
  74         require_once drupal_get_path('module', 'pathauto') . '/pathauto.inc';
  75         $aliases[$facet_info['name']] = pathauto_cleanstring($voc->name);
  76       }
  77     }
  78     return $aliases[$facet_info['name']];
  79   }
  80 }