Issue #3197939 by akalam: Add a disallow/allow list option as configuration so...

namespace Drupal\eu_cookie_compliance_rocketship\Plugin\Field\FieldFormatter;

use Drupal\Core\Field\FieldItemListInterface;

use Drupal\Core\Form\FormStateInterface;

use Drupal\iframe\Plugin\Field\FieldFormatter\IframeOnlyFormatter;

class CookieBlockedIframeOnly extends IframeOnlyFormatter {

  /**

   * {@inheritdoc}

   */

  public static function defaultSettings() {

    return [

      'whitelist_hostnames' => '',

    ] + parent::defaultSettings();

  }

  /**

   * {@inheritdoc}

   */

  public function settingsForm(array $form, FormStateInterface $form_state) {

    $form = parent::settingsForm($form, $form_state);

    $form['whitelist_hostnames'] = [

      '#type' => 'textarea',

      '#title' => $this->t('Whitelist hostnames'),

      '#description' => $this->t('Specify domains to be skipped from cookie_content_blocker. One hostname per line'),

      '#default_value' => $this->getSetting('whitelist_hostnames'),

      '#required' => FALSE,

    ];

    return $form;

  }

  /**

   * {@inheritdoc}

   */

  public function settingsSummary() {

    $summary = [];

    $whitelist_hostnames = $this->getSetting('whitelist_hostnames');

    if (!empty($whitelist_hostnames)) {

      $summary[] = $this->t('Whitelist hostnames @hostnames', ['@hostnames' => str_replace("\n", ', ', $whitelist_hostnames)]);

    }

    return $summary;

  }

  /**

   * {@inheritdoc}

   */

    // Let parent formatter do it's magic.

    $elements = parent::viewElements($items, $langcode);

    $whitelist_hostnames = explode("\n", $this->getSetting('whitelist_hostnames'));

    // Attach Cookie Content Blocker's pre_render.

    foreach ($items as $delta => $item) {

      // Don

      if (!empty($whitelist_hostnames) && in_array(parse_url($elements[$delta]['#src'], PHP_URL_HOST), $whitelist_hostnames)) {

        continue;

      }

      $element[$delta]['#pre_render'] = $element[$delta]['#pre_render'] ?? [];

      $elements[$delta]['#pre_render'][] = 'cookie_content_blocker.element.processor:processElement';

      // TODO: extend formatter settings with CCB options (like button_text) and set them here.