improvements-2.x-dev/modules/improvements_views/src/Plugin/views/sort/IsCurrentUser.php

<?php

namespace Drupal\improvements_views\Plugin\views\sort;

use Drupal\Core\Cache\Cache;
use Drupal\Core\Session\AccountProxyInterface;
use Drupal\views\Attribute\ViewsSort;
use Drupal\views\Plugin\views\sort\SortPluginBase;
use Symfony\Component\DependencyInjection\ContainerInterface;

#[ViewsSort('is_current_user')]
class IsCurrentUser extends SortPluginBase {

  protected AccountProxyInterface $currentUser;

  /**
   * Class constructor.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, AccountProxyInterface $current_user) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->currentUser = $current_user;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition): static {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('current_user'),
    );
  }

  /**
   * {@inheritDoc}
   */
  public function query(): void {
    if ($current_user_id = $this->currentUser->id()) {
      $this->ensureMyTable();
      $query = $this->query; /** @var \Drupal\views\Plugin\views\query\Sql $query */
      $sort_alias = $this->realField . '_is_current_user';
      $query->addOrderBy(NULL, "IF ($this->tableAlias.$this->realField = $current_user_id, 1, 0)", $this->options['order'], $sort_alias);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheContexts(): array {
    return Cache::mergeContexts(parent::getCacheContexts(), ['user']);
  }

}