comment_entity_view_display_presave

comment_entity_view_display_presave(EntityViewDisplayInterface $display)

function comment_entity_view_display_presave(EntityViewDisplayInterface $display) {
  // Act only on comment view displays being disabled.
  if ($display->isNew() || $display->getTargetEntityTypeId() !== 'comment' || $display->status()) {
    return;
  }
  $storage = \Drupal::entityTypeManager()->getStorage('entity_view_display');
  if (!$storage->loadUnchanged($display->getOriginalId())->status()) {
    return;
  }

  // Disable the comment field formatter when the used view display is disabled.
  foreach ($storage->loadMultiple() as $id => $view_display) {
    $changed = FALSE;
    /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $view_display */
    foreach ($view_display->getComponents() as $field => $component) {
      if (isset($component['type']) && ($component['type'] === 'comment_default')) {
        if ($component['settings']['view_mode'] === $display->getMode()) {
          $view_display->removeComponent($field);
          /** @var \Drupal\Core\Entity\EntityViewModeInterface $mode */
          $mode = EntityViewMode::load($display->getTargetEntityTypeId() . '.' . $display->getMode());
          $arguments = [
            '@id' => $view_display->id(),
            '@name' => $field,
            '@display' => $mode->label(),
            '@mode' => $display->getMode(),
          ];
          \Drupal::logger('system')->warning("View display '@id': Comment field formatter '@name' was disabled because it is using the comment view display '@display' (@mode) that was just disabled.", $arguments);
          $changed = TRUE;
        }
      }
    }
    if ($changed) {
      $view_display->save();
    }
  }
}