taxonomy_check_vocabulary_hierarchy(VocabularyInterface $vocabulary, $changed_term)
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 VocabularyInterface::HIERARCHY_DISABLED. If any term has a single parent then the vocabulary will be given a hierarchy of VocabularyInterface::HIERARCHY_SINGLE. If any term has multiple parents then the vocabulary will be given a hierarchy of VocabularyInterface::HIERARCHY_MULTIPLE.
Parameters
\Drupal\taxonomy\VocabularyInterface $vocabulary: A taxonomy vocabulary entity.
$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
- core/modules/taxonomy/taxonomy.module, line 160
- Enables the organization of content into categories.
Code
function taxonomy_check_vocabulary_hierarchy(VocabularyInterface $vocabulary, $changed_term) {
$tree = \Drupal::entityManager()->getStorage('taxonomy_term')->loadTree($vocabulary->id());
$hierarchy = VocabularyInterface::HIERARCHY_DISABLED;
foreach ($tree as $term) {
// Update the changed term with the new parent value before comparison.
if ($term->tid == $changed_term['tid']) {
$term = (object) $changed_term;
$term->parents = $term->parent;
}
// Check this term's parent count.
if (count($term->parents) > 1) {
$hierarchy = VocabularyInterface::HIERARCHY_MULTIPLE;
break;
}
elseif (count($term->parents) == 1 && !isset($term->parents[0])) {
$hierarchy = VocabularyInterface::HIERARCHY_SINGLE;
}
}
if ($hierarchy != $vocabulary->getHierarchy()) {
$vocabulary->setHierarchy($hierarchy);
$vocabulary->save();
}
return $hierarchy;
}
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