migrate_spip-1.0.0/src/Plugin/SpipRichText/Anchors.php

<?php

declare(strict_types=1);

namespace Drupal\migrate_spip\Plugin\SpipRichText;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\migrate_spip\Attribute\SpipRichText;
use Drupal\migrate_spip\SpipRichTextBase;

/**
 * Manage SPIP anchors.
 *
 * Need to be executed before Links.
 */
#[SpipRichText(
  id: 'anchors',
  label: new TranslatableMarkup('Anchor'),
  weight: -22,
)]
final class Anchors extends SpipRichTextBase {

  /**
   * {@inheritdoc}
   */
  public function apply(string $text): string {
    return preg_replace(
      // SPIP generates the anchors in the form of a link.
      // However, this is not a good practice in terms of accessibility.
      // Use "span" HTML tag instead.
      '#\[\#((?!<-).*?)<-]#mS',
      '<span id="$1"></span>',
      $text
    );
  }

}