function forum_form_taxonomy_vocabulary_form_alter

Implements hook_form_BASE_FORM_ID_alter() for \Drupal\taxonomy\VocabularyForm.

File

core/modules/forum/forum.module, line 289

Code

function forum_form_taxonomy_vocabulary_form_alter(&$form, FormStateInterface $form_state, $form_id) {
    $vid = \Drupal::config('forum.settings')->get('vocabulary');
    $vocabulary = $form_state->getFormObject()
        ->getEntity();
    if ($vid == $vocabulary->id()) {
        $form['help_forum_vocab'] = [
            '#markup' => t('This is the designated forum vocabulary. Some of the normal vocabulary options have been removed.'),
            '#weight' => -1,
        ];
        // Forum's vocabulary always has single hierarchy. Forums and containers
        // have only one parent or no parent for root items. By default this value
        // is 0.
        $form['hierarchy']['#value'] = VocabularyInterface::HIERARCHY_SINGLE;
        // Do not allow to delete forum's vocabulary.
        $form['actions']['delete']['#access'] = FALSE;
        // Do not allow to change a vid of forum's vocabulary.
        $form['vid']['#disabled'] = TRUE;
    }
}