translation_views-8.x-1.x-dev/src/Plugin/views/field/TranslationCountField.php

<?php

namespace Drupal\translation_views\Plugin\views\field;

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\translation_views\TranslationCountTrait;
use Drupal\views\Plugin\views\field\NumericField;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\views\Plugin\ViewsHandlerManager;

/**
 * Show translation count.
 *
 * @ingroup views_field_handlers
 *
 * @ViewsField("translation_views_translation_count")
 */
class TranslationCountField extends NumericField implements ContainerFactoryPluginInterface {
  use TranslationCountTrait;

  /**
   * Translation table alias.
   *
   * @var string
   */
  public $tableAlias = 'translations';

  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, ViewsHandlerManager $join_handler) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);

    $this->entityTypeManager = $entity_type_manager;
    $this->joinHandler = $join_handler;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration, $plugin_id, $plugin_definition,
      $container->get('entity_type.manager'),
      $container->get('plugin.manager.views.join')
    );
  }

  /**
   * {@inheritdoc}
   */
  public function query() {
    /** @var \Drupal\views\Plugin\views\query\Sql $query */
    $query = $this->query;
    $join_alias = $this->joinLanguages($query);
    $this->field_alias = $query->addField($join_alias, 'count_langs', $this->realField);
  }

  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['include_original_language'] = ['default' => FALSE];
    return $options;
  }

  /**
   * Provide option to include original language in count.
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    $form['include_original_language'] = [
      '#title' => $this->t('Include original language in count'),
      '#description' => $this->t("Enable to also count the original language."),
      '#type' => 'checkbox',
      '#default_value' => !empty($this->options['include_original_language']),
    ];
    parent::buildOptionsForm($form, $form_state);
  }

}