l10n_server-2.x-dev/l10n_migrate/src/Plugin/migrate/source/LocalizeFile.php

<?php

declare(strict_types=1);

namespace Drupal\l10n_migrate\Plugin\migrate\source;

use Drupal\file\Plugin\migrate\source\d7\File;
use Drupal\migrate\Row;

/**
 * File source plugin.
 *
 * @note source_module value must not be altered.
 * @see https://www.drupal.org/project/media_migration/issues/3353736
 *
 * @MigrateSource(
 *   id = "l10n_d7_file",
 *   source_module = "file",
 * )
 */
class LocalizeFile extends File {

  /**
   * {@inheritdoc}
   */
  public function query() {
    $query = parent::query();
    // Exclude .po file (synched, not migrated).
    $query->condition('f.filename', '%.po', 'NOT LIKE');
    return $query;
  }

  /**
   * {@inheritdoc}
   */
  public function prepareRow(Row $row) {
    $skipped = parent::prepareRow($row);
    $path = str_replace('public://', '', $row->getSourceProperty('uri'));
    $row->setSourceProperty('filepath', $path);
    return $skipped;
  }

}