class MigrateExternalTranslatedTestSource

class MigrateExternalTranslatedTestSource extends SourcePluginBase {
  
  /**
   * The data to import.
   *
   * @var array
   */
  protected $import = [
    [
      'name' => 'cat',
      'title' => 'Cat',
      'lang' => 'English',
    ],
    [
      'name' => 'cat',
      'title' => 'Chat',
      'lang' => 'French',
    ],
    [
      'name' => 'cat',
      'title' => 'es - Cat',
      'lang' => 'Spanish',
    ],
    [
      'name' => 'dog',
      'title' => 'Dog',
      'lang' => 'English',
    ],
    [
      'name' => 'dog',
      'title' => 'fr - Dog',
      'lang' => 'French',
    ],
    [
      'name' => 'monkey',
      'title' => 'Monkey',
      'lang' => 'English',
    ],
  ];
  
  /**
   * {@inheritdoc}
   */
  public function fields() {
    return [
      'name' => $this->t('Unique name'),
      'title' => $this->t('Title'),
      'lang' => $this->t('Language'),
    ];
  }
  
  /**
   * {@inheritdoc}
   */
  public function __toString() {
    return '';
  }
  
  /**
   * {@inheritdoc}
   */
  public function getIds() {
    $ids['name']['type'] = 'string';
    if (!$this->configuration['default_lang']) {
      $ids['lang']['type'] = 'string';
    }
    return $ids;
  }
  
  /**
   * {@inheritdoc}
   */
  protected function initializeIterator() {
    $data = [];
    // Keep the rows with the right languages.
    $want_default = $this->configuration['default_lang'];
    foreach ($this->import as $row) {
      $is_english = $row['lang'] == 'English';
      if ($want_default == $is_english) {
        $data[] = $row;
      }
    }
    return new \ArrayIterator($data);
  }

}