Taxonomy term UUID filter

<?php

namespace Drupal\djr_views\Plugin\views\filter;

use Drupal\Core\Form\FormStateInterface;
use Drupal\taxonomy\Entity\Term;
use Drupal\taxonomy\Plugin\views\filter\TaxonomyIndexTid;
use Drupal\views\Plugin\views\filter\InOperator;

/**
 * Filter by term id.
 *
 * @ingroup views_filter_handlers
 *
 * @ViewsFilter("djr_views_term_uuid")
 */
class TermUuid extends TaxonomyIndexTid {

  /**
   * {@inheritdoc}
   */
  public function valueForm(&$form, FormStateInterface $form_state) {
    parent::valueForm($form, $form_state);

    // Alter the form options so the key (value that is saved) is the uuid.
    $vocabulary = $this->vocabularyStorage->load($this->options['vid']);
    $options = array();
    $query = \Drupal::entityQuery('taxonomy_term')
      // @todo Sorting on vocabulary properties -
      //   https://www.drupal.org/node/1821274.
      ->sort('weight')
      ->sort('name')
      ->addTag('term_access');
    if ($this->options['limit']) {
      $query->condition('vid', $vocabulary->id());
    }
    $result = $query->execute();

    /** @var Term[] $terms */
    $terms = Term::loadMultiple($result);
    foreach ($terms as $term) {
      $options[$term->uuid()] = \Drupal::entityManager()->getTranslationFromContext($term)->label();
    }
    $form['value']['#options'] = $options;
  }

  /**
   * {@inheritdoc}
   */
  public function query() {
    // Convert uuid to tid at query time.
    $uuids = $this->value;
    $new_values = [];

    /** @var \Drupal\Core\Entity\EntityRepositoryInterface $repository */
    $repository = \Drupal::service('entity.repository');
    foreach ($uuids as $uuid) {
      $term = $repository->loadEntityByUuid('taxonomy_term', $uuid);
      $new_values[$term->id()] = $term->id();
    }
    $this->value = $new_values;

    parent::query();
  }

  /**
   * {@inheritdoc}
   */
  public function adminSummary() {
    // Set up $this->valueOptions for the parent summary.
    $this->valueOptions = array();

    if ($this->value) {
      $this->value = array_filter($this->value);
      /** @var \Drupal\Core\Entity\EntityRepositoryInterface $repository */
      $repository = \Drupal::service('entity.repository');
      foreach ($this->value as $uuid) {
        $term = $repository->loadEntityByUuid('taxonomy_term', $uuid);
        $this->valueOptions[$term->uuid()] = \Drupal::entityManager()->getTranslationFromContext($term)->label();
      }
    }
    // Skip TaxonomyIndexTid::adminSummary cause it overwrites our stuff.
    return InOperator::adminSummary();
  }
}