Dynamically check and update the hierarachy flag of a vocabulary. Checks and updates the hierarchy flag of a vocabulary.

Checks the current parents of all terms in a vocabulary and updates the vocabulary's hierarchy setting to the lowest possible level. If no term has parent terms then the vocabulary will be given a hierarchy of 0. If any term has a single parent then the vocabulary will be given a hierarchy of 1. If any term has multiple parents then the vocabulary will be given a hierarchy of 2.

Parameters

$vocabulary: An array of the vocabulary structure.

$changed_term: An array of the term structure that was updated.

Return value

An integer that represents the level of the vocabulary's hierarchy.

File

drupal-6.x/modules/taxonomy/taxonomy.module, line 273

Enables the organization of content into categories.

Code

function taxonomy_check_vocabulary_hierarchy($vocabulary, $changed_term) {
  $tree = taxonomy_get_tree($vocabulary['vid']);
  $hierarchy = 0;
  foreach ($tree as $term) {
    // Update the changed term with the new parent value before comparision.
    if ($term->tid == $changed_term['tid']) {
      $term = (object) $changed_term;
      $term->parents = $term->parent;
    }
    // Check this term's parent count.
    if (count($term->parents) > 1) {
      $hierarchy = 2;
      break;
    }
    elseif (count($term->parents) == 1 && 0 !== array_shift($term->parents)) {
      $hierarchy = 1;
    }
  }
  if ($hierarchy != $vocabulary['hierarchy']) {
    $vocabulary['hierarchy'] = $hierarchy;
    taxonomy_save_vocabulary($vocabulary);
  }

  return $hierarchy;
}