FieldInstanceOptionTranslation.php

<?php

namespace Drupal\field\Plugin\migrate\process\d6;

use Drupal\Component\Utility\FilterArray;
use Drupal\migrate\Attribute\MigrateProcess;
use Drupal\migrate\MigrateExecutableInterface;
use Drupal\migrate\ProcessPluginBase;
use Drupal\migrate\Row;

/**
 * Determines the settings property and translation for boolean fields.
 *
 * @deprecated in drupal:11.3.0 and is removed from drupal:12.0.0. There is no
 *   replacement.
 *
 * @see https://www.drupal.org/node/3533560
 */
class FieldInstanceOptionTranslation extends ProcessPluginBase {
  public function __construct(array $configuration, $plugin_id, $plugin_definition) {
    @trigger_error(__CLASS__ . ' is deprecated in drupal:11.3.0 and is removed from drupal:12.0.0. There is no replacement. See https://www.drupal.org/node/3533560', E_USER_DEPRECATED);
    parent::__construct($configuration, $plugin_id, $plugin_definition);
  }
  
  /**
   * {@inheritdoc}
   */
  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
    [$field_type, $global_settings] = $value;
    $option_key = 0;
    $translation = '';
    if (isset($global_settings['allowed_values'])) {
      $list = explode("\n", $global_settings['allowed_values']);
      $list = array_map('trim', $list);
      $list = FilterArray::removeEmptyStrings($list);
      switch ($field_type) {
        case 'boolean':
          $option = preg_replace('/^option_/', '', $row->getSourceProperty('property'));
          for ($i = 0; $i < 2; $i++) {
            $value = $list[$i];
            $tmp = explode("|", $value);
            $original_option_key = $tmp[0] ?? NULL;
            $option_key = $i === 0 ? 'off_label' : 'on_label';
            // Find property with name matching the original option.
            if ($option == $original_option_key) {
              $translation = $row->getSourceProperty('translation');
              break;

            }
          }
          break;

        default:
      }
    }
    return [
      'settings.' . $option_key,
      $translation,
    ];
  }

}