translation_views-8.x-1.x-dev/src/TranslationViewsTargetLanguage.php

<?php

namespace Drupal\translation_views;

use Drupal\views\Plugin\views\PluginBase;

/**
 * Trait TranslationViewsTargetLanguage.
 *
 * Used to give ability to get selected target langcode,
 * used by different different fields, filters.
 *
 * @package Drupal\translation_views
 */
trait TranslationViewsTargetLanguage {

  /**
   * The language manager.
   *
   * @var \Drupal\Core\Language\LanguageManagerInterface
   */
  protected $languageManager;
  /**
   * Target exposed key.
   *
   * @var string
   */
  public static $targetExposedKey = 'translation_target_language';

  /**
   * Get target language from exposed input.
   *
   * @return string
   *   The selected target langcode.
   */
  protected function getTargetLangcode() {
    $inputs   = $this->view->getExposedInput();
    $langcode = isset($inputs[self::$targetExposedKey])
      ? $inputs[self::$targetExposedKey]
      : PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT;

    return $langcode == PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT
      ? $this->languageManager->getDefaultLanguage()->getId()
      : $langcode;
  }

}