function taxonomy_multidelete_terms_form_alter in Taxonomy Multi-delete Terms 8

Implements hook_form_FORM_ID_alter().

File

./taxonomy_multidelete_terms.module, line 33

Control taxonomy term delete.

Code

function taxonomy_multidelete_terms_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  if ($form_id === 'taxonomy_overview_terms') {
    $checkboxes_present = FALSE;
    $user = \Drupal::currentUser();

    //Exit now if we don't have permissions to multi-delete
    if (!$user
      ->hasPermission('access taxonomy multidelete terms')) {
      return;
    }
    $vocabulary = $form_state
      ->get([
      'taxonomy',
      'vocabulary',
    ]);
    $tree = \Drupal::service('entity_type.manager')
      ->getStorage("taxonomy_term")
      ->loadTree($vocabulary
      ->id(), 0, NULL, TRUE);
    $term_id = array();
    foreach ($tree as $term) {
      $term_id[] = $term
        ->id();
    }
    foreach ($form['terms'] as $key => $element) {

      //If the weight field is present, then the vocabulary is in a state where it can be updated.
      if (substr($key, 0, 4) === 'tid:' && isset($form['terms'][$key]['weight'])) {
        $checkboxes_present = TRUE;

        //Add delete checkbox to table
        $form['terms'][$key]['term']['check-delete'] = [
          '#type' => 'checkbox',
          '#title' => Link::fromTextAndUrl($form['terms'][$key]['term']['#title'], $form['terms'][$key]['term']['#url'])
            ->toString(),
        ];
        if (count($term_id) == 1) {
          $form['terms'][$key]['term']['tid'] = array(
            '#type' => 'hidden',
            '#value' => $term_id[0],
            '#attributes' => array(
              'class' => array(
                'term-id',
              ),
            ),
          );
          $form['terms'][$key]['term']['depth'] = array(
            '#type' => 'hidden',
            '#default_value' => 0,
            '#attributes' => array(
              'class' => array(
                'term-depth',
              ),
            ),
          );
        }

        //Change root item from a link to a container to avoid showing links twice.
        unset($form['terms'][$key]['term']['#title']);
        unset($form['terms'][$key]['term']['#url']);
        $form['terms'][$key]['term']['#type'] = "container";
      }
    }

    //Make sure we rendered at least one checkbox before adding the delete button and select all header option.
    if ($checkboxes_present) {

      //Add 'select all' checkbox to the header. Width auto because select all assumes it's the only thing in the column
      $form['terms']['#header']['term'] = [
        'data' => Markup::create('  ' . t('Name')),
        'class' => [
          'select-all',
        ],
        'style' => 'width:auto;',
      ];
      $form['actions']['delete'] = [
        '#type' => 'submit',
        '#value' => t('Delete'),
        '#submit' => [
          'taxonomy_multidelete_terms_taxonomy_overview_terms_submit',
        ],
      ];
      $form['#validate'][] = 'taxonomy_multidelete_terms_taxonomy_overview_terms_validate';
      $form['#attached']['library'][] = 'core/drupal.tableselect';
    }
  }
}