migrate_spip-1.0.0/src/Plugin/SpipRichText/LineBreaks.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 line breaks.
 *
 * Need to be executed before paragraphs.
 */
#[SpipRichText(
  id: 'line_breaks',
  label: new TranslatableMarkup('Line break'),
  weight: -40,
)]
final class LineBreaks extends SpipRichTextBase {

  /**
   * {@inheritdoc}
   */
  public function apply(string $text): string {
    return preg_replace(
      [
        ",\r\n?,S",
        // Line break useless.
        "#(^|^\n|\n\n)_ +#S",
        // Correct line break.
        "#\n_ +#S",
      ],
      [
        "\n",
        "$1",
        '<br class="manualbr" />',
      ],
      $text
    );
  }

}