class Roles

class Roles extends ManyToOne {
    
    /**
     * The role storage.
     *
     * @var \Drupal\user\RoleStorageInterface
     */
    protected $roleStorage;
    
    /**
     * Constructs a Roles object.
     *
     * @param array $configuration
     *   A configuration array containing information about the plugin instance.
     * @param string $plugin_id
     *   The plugin_id for the plugin instance.
     * @param mixed $plugin_definition
     *   The plugin implementation definition.
     * @param \Drupal\user\RoleStorageInterface $role_storage
     *   The role storage.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, RoleStorageInterface $role_storage) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->roleStorage = $role_storage;
    }
    
    /**
     * {@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')
            ->getStorage('user_role'));
    }
    public function getValueOptions() {
        $this->valueOptions = user_role_names(TRUE);
        unset($this->valueOptions[RoleInterface::AUTHENTICATED_ID]);
        return $this->valueOptions;
    }
    
    /**
     * Override empty and not empty operator labels to be clearer for user roles.
     */
    public function operators() {
        $operators = parent::operators();
        $operators['empty']['title'] = $this->t("Only has the 'authenticated user' role");
        $operators['not empty']['title'] = $this->t("Has roles in addition to 'authenticated user'");
        return $operators;
    }
    
    /**
     * {@inheritdoc}
     */
    public function calculateDependencies() {
        $dependencies = [];
        if (in_array($this->operator, [
            'empty',
            'not empty',
        ])) {
            return $dependencies;
        }
        // The value might be a string due to the wrong plugin being used for role
        // field data, and subsequently the incorrect config schema object and
        // value. In the empty case stop early. Otherwise we cast it to an array
        // later.
        if (is_string($this->value) && $this->value === '') {
            return [];
        }
        foreach ((array) $this->value as $role_id) {
            if ($role = $this->roleStorage
                ->load($role_id)) {
                $dependencies[$role->getConfigDependencyKey()][] = $role->getConfigDependencyName();
            }
            else {
                trigger_error("The {$role_id} role does not exist. You should review and fix the configuration of the {$this->view->id()} view.", E_USER_WARNING);
            }
        }
        return $dependencies;
    }

}