UserUnblock.php

<?php

namespace Drupal\rules\Plugin\RulesAction;

use Drupal\rules\Core\RulesActionBase;
use Drupal\user\UserInterface;

/**
 * Provides "Unblock User" action.
 *
 * @todo Add access callback information from Drupal 7.
 *
 * @RulesAction(
 *   id = "rules_user_unblock",
 *   label = @Translation("Unblock a user"),
 *   category = @Translation("User"),
 *   context_definitions = {
 *     "user" = @ContextDefinition("entity:user",
 *       label = @Translation("User"),
 *       description = @Translation("Specifies the user that should be unblocked.")
 *     ),
 *   }
 * )
 */
class UserUnblock extends RulesActionBase {
    
    /**
     * Flag that indicates if the entity should be auto-saved later.
     *
     * @var bool
     */
    protected $saveLater = FALSE;
    
    /**
     * Unblock a user.
     *
     * @param \Drupal\user\UserInterface $user
     *   The user to unblock.
     */
    protected function doExecute(UserInterface $user) {
        // Do nothing if user is anonymous or isn't blocked.
        if ($user->isAuthenticated() && $user->isBlocked()) {
            $user->activate();
            // Set flag that indicates if the entity should be auto-saved later.
            $this->saveLater = TRUE;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function autoSaveContext() {
        if ($this->saveLater) {
            return [
                'user',
            ];
        }
        return [];
    }

}