UserAuthenticator.php in Social Auth 8.2

Namespace

Drupal\social_auth\User

File

src/User/UserAuthenticator.php

<?php

namespace Drupal\social_auth\User;

use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Logger\LoggerChannelFactoryInterface;
use Drupal\Core\Messenger\MessengerInterface;
use Drupal\Core\Routing\RouteProviderInterface;
use Drupal\Core\Session\AccountProxyInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\Url;
use Drupal\social_api\User\UserAuthenticator as SocialApiUserAuthenticator;
use Drupal\social_auth\Event\BeforeRedirectEvent;
use Drupal\social_auth\Event\FailedAuthenticationEvent;
use Drupal\social_auth\Event\SocialAuthEvents;
use Drupal\social_auth\Event\UserEvent;
use Drupal\social_auth\SettingsTrait;
use Drupal\social_auth\SocialAuthDataHandler;
use Drupal\user\UserInterface;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\HttpFoundation\RedirectResponse;

/**
 * Manages Drupal authentication tasks for Social Auth.
 */
class UserAuthenticator extends SocialApiUserAuthenticator {
  use SettingsTrait;
  use StringTranslationTrait;

  /**
   * Event dispatcher.
   *
   * @var \Symfony\Component\EventDispatcher\EventDispatcherInterface
   */
  protected $eventDispatcher;

  /**
   * The Social Auth user manager.
   *
   * @var \Drupal\social_auth\User\UserManager
   */
  protected $userManager;

  /**
   * The redirection response to be returned.
   *
   * @var \Symfony\Component\HttpFoundation\RedirectResponse
   */
  protected $response;

  /**
   * Constructor.
   *
   * @param \Drupal\Core\Session\AccountProxyInterface $current_user
   *   Used to get current active user.
   * @param \Drupal\Core\Messenger\MessengerInterface $messenger
   *   Used to display messages to user.
   * @param \Drupal\Core\Logger\LoggerChannelFactoryInterface $logger_factory
   *   Used for logging errors.
   * @param \Drupal\social_auth\User\UserManager $user_manager
   *   The Social API user manager.
   * @param \Drupal\social_auth\SocialAuthDataHandler $data_handler
   *   Used to interact with session.
   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
   *   Used for accessing Drupal configuration.
   * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
   *   Used to check if route path exists.
   * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
   *   Used for dispatching social auth events.
   */
  public function __construct(AccountProxyInterface $current_user, MessengerInterface $messenger, LoggerChannelFactoryInterface $logger_factory, UserManager $user_manager, SocialAuthDataHandler $data_handler, ConfigFactoryInterface $config_factory, RouteProviderInterface $route_provider, EventDispatcherInterface $event_dispatcher) {
    parent::__construct($current_user, $messenger, $logger_factory, $user_manager, $data_handler);
    $this->configFactory = $config_factory;
    $this->routeProvider = $route_provider;
    $this->eventDispatcher = $event_dispatcher;
  }

  /**
   * Sets the destination parameter path for redirection after login.
   *
   * @param string $destination
   *   The path to redirect to.
   */
  public function setDestination($destination) {
    $this->dataHandler
      ->set('login_destination', $destination);
  }

  /**
   * Creates and/or authenticates an user.
   *
   * @param string $name
   *   The user's name.
   * @param string $email
   *   The user's email address.
   * @param string $provider_user_id
   *   The unique id returned by the user.
   * @param string $token
   *   The access token for making additional API calls.
   * @param string|null $picture_url
   *   The user's picture.
   * @param array|null $data
   *   The additional user data to be stored in database.
   *
   * @return \Symfony\Component\HttpFoundation\RedirectResponse
   *   A redirect response.
   */
  public function authenticateUser($name, $email, $provider_user_id, $token, $picture_url = NULL, $data = NULL) {

    // Checks for record in Social Auth entity.
    $user_id = $this->userManager
      ->getDrupalUserId($provider_user_id);

    // If user is already authenticated.
    if ($this->currentUser
      ->isAuthenticated()) {

      // If no record for provider exists.
      if ($user_id === FALSE) {
        $this
          ->associateNewProvider($provider_user_id, $token, $data);
        return $this->response;
      }
      else {
        return $this
          ->getPostLoginRedirection();
      }
    }

    // If user previously authorized the provider, load user through provider.
    if ($user_id) {
      $this
        ->authenticateWithProvider($user_id);
      return $this->response;
    }

    // Try to authenticate user using email address.
    if ($email) {

      // If authentication with email was successful.
      if ($this
        ->authenticateWithEmail($email, $provider_user_id, $token, $data)) {
        return $this->response;
      }
    }
    $user = new SocialAuthUser($name, $email, $provider_user_id, $token, $picture_url, $data);

    // At this point, create a new user.
    $drupal_user = $this->userManager
      ->createNewUser($user);
    $this
      ->authenticateNewUser($drupal_user);
    return $this->response;
  }

  /**
   * Associates an existing user with a new provider.
   *
   * @param string $provider_user_id
   *   The unique id returned by the user.
   * @param string $token
   *   The access token for making additional API calls.
   * @param array|null $data
   *   The additional user_data to be stored in database.
   */
  public function associateNewProvider($provider_user_id, $token, $data) {
    if ($this->userManager
      ->addUserRecord($this->currentUser
      ->id(), $provider_user_id, $token, $data)) {
      $this->response = $this
        ->getPostLoginRedirection();
      return;
    }
    $this->messenger
      ->addError($this
      ->t('New provider could not be associated.'));
    $this->response = $this
      ->getLoginFormRedirection();
  }

  /**
   * Authenticates user using provider.
   *
   * @param int $user_id
   *   The Drupal user id.
   *
   * @return bool
   *   True is user provider could be associated.
   *   False otherwise.
   */
  public function authenticateWithProvider($user_id) {
    try {

      // Load the user by their Drupal user id.
      $drupal_user = $this->userManager
        ->loadUserByProperty('uid', $user_id);
      if ($drupal_user) {

        // Authenticates and redirect existing user.
        $this
          ->authenticateExistingUser($drupal_user);
        return TRUE;
      }
      return FALSE;
    } catch (\Exception $ex) {
      $this->loggerFactory
        ->get($this
        ->getPluginId())
        ->error('Failed to authenticate user. Exception: @message', [
        '@message' => $ex
          ->getMessage(),
      ]);
      return FALSE;
    }
  }

  /**
   * Authenticates user by email address.
   *
   * @param string $email
   *   The user's email address.
   * @param string $provider_user_id
   *   The unique id returned by the user.
   * @param string $token
   *   The access token for making additional API calls.
   * @param array|null $data
   *   The additional user_data to be stored in database.
   *
   * @return bool
   *   True if user could be authenticated with email.
   *   False otherwise.
   */
  public function authenticateWithEmail($email, $provider_user_id, $token, $data) {
    try {

      // Load user by email.
      $drupal_user = $this->userManager
        ->loadUserByProperty('mail', $email);

      // Check if user with same email account exists.
      if ($drupal_user) {

        // Add record for the same user.
        $this->userManager
          ->addUserRecord($drupal_user
          ->id(), $provider_user_id, $token, $data);

        // Authenticates and redirect the user.
        $this
          ->authenticateExistingUser($drupal_user);
        return TRUE;
      }
    } catch (\Exception $ex) {
      $this->loggerFactory
        ->get($this
        ->getPluginId())
        ->error('Failed to authenticate user. Exception: @message', [
        '@message' => $ex
          ->getMessage(),
      ]);
    }
    return FALSE;
  }

  /**
   * Authenticates and redirects existing users in authentication process.
   *
   * @param \Drupal\user\UserInterface $drupal_user
   *   User object to authenticate.
   */
  public function authenticateExistingUser(UserInterface $drupal_user) {

    // If Admin (user 1) can not authenticate.
    if ($this
      ->isAdminDisabled($drupal_user)) {
      $this
        ->nullifySessionKeys();
      $this->messenger
        ->addError($this
        ->t('Authentication for Admin (user 1) is disabled.'));
      $this->response = $this
        ->getLoginFormRedirection();
      return;
    }

    // If user can not login because of their role.
    $disabled_role = $this
      ->isUserRoleDisabled($drupal_user);
    if ($disabled_role) {
      $this->messenger
        ->addError($this
        ->t("Authentication for '@role' role is disabled.", [
        '@role' => $disabled_role,
      ]));
      $this->response = $this
        ->getLoginFormRedirection();
      return;
    }

    // If user could be logged in.
    if ($this
      ->loginUser($drupal_user)) {
      $this->response = $this
        ->getPostLoginRedirection();
    }
    else {
      $this
        ->nullifySessionKeys();
      $this->messenger
        ->addError($this
        ->t('Your account has not been approved yet or might have been canceled, please contact the administrator.'));
      $this->response = $this
        ->getLoginFormRedirection();
    }
  }

  /**
   * Authenticates and redirects new users in authentication process.
   *
   * @param \Drupal\user\UserInterface|null $drupal_user
   *   User object to login.
   */
  public function authenticateNewUser(UserInterface $drupal_user = NULL) {

    // If it's a valid Drupal user.
    if ($drupal_user) {

      // If the account needs admin approval.
      if ($this
        ->isApprovalRequired()) {
        $this->messenger
          ->addWarning($this
          ->t("Your account was created, but it needs administrator's approval."));
        $this
          ->nullifySessionKeys();
        $this->response = $this
          ->getLoginFormRedirection();
        return;
      }

      // If the new user could be logged in.
      if ($this
        ->loginUser($drupal_user)) {

        // User form redirection or false if option is not enabled.
        $redirect = $this
          ->redirectToUserForm($drupal_user);
        if ($redirect) {
          $this->response = $redirect;
          return;
        }
        $this->response = $this
          ->getPostLoginRedirection();
        return;
      }
    }
    if (!$this
      ->isRegistrationDisabled()) {
      $this->messenger
        ->addError($this
        ->t('You could not be authenticated. Contact site administrator.'));
    }
    $this
      ->nullifySessionKeys();
    $this->response = $this
      ->getLoginFormRedirection();
  }

  /**
   * Logs the user in.
   *
   * @param \Drupal\user\UserInterface $drupal_user
   *   User object.
   *
   * @return bool
   *   True if login was successful
   *   False if the login was blocked
   */
  public function loginUser(UserInterface $drupal_user) {

    // Check that the account is active and log the user in.
    if ($drupal_user
      ->isActive()) {
      $this
        ->userLoginFinalize($drupal_user);

      // Dispatches SocialAuthEvents::USER_LOGIN event.
      $event = new UserEvent($drupal_user, $this
        ->getPluginId());
      $this->eventDispatcher
        ->dispatch(SocialAuthEvents::USER_LOGIN, $event);
      return TRUE;
    }
    $this->loggerFactory
      ->get($this
      ->getPluginId())
      ->warning('Login for user @user prevented. Account is blocked.', [
      '@user' => $drupal_user
        ->getAccountName(),
    ]);
    return FALSE;
  }

  /**
   * Checks if provider is already associated to the Drupal user.
   *
   * @param string $provider_user_id
   *   User's id on provider.
   *
   * @return int|false
   *   The Drupal user id if it exists.
   *   False otherwise.
   */
  public function checkProviderIsAssociated($provider_user_id) {
    return $this->userManager
      ->getDrupalUserId($provider_user_id);
  }

  /**
   * Returns redirection to user login form.
   *
   * @return \Symfony\Component\HttpFoundation\RedirectResponse
   *   The redirection response.
   */
  protected function getLoginFormRedirection() {
    return new RedirectResponse(Url::fromRoute('user.login')
      ->toString());
  }

  /**
   * Wrapper for user_login_finalize.
   *
   * We need to wrap the legacy procedural Drupal API functions so that we are
   * not using them directly in our own methods. This way we can unit test our
   * own methods.
   *
   * @param \Drupal\User\UserInterface $account
   *   The Drupal user.
   *
   * @see user_password
   */
  protected function userLoginFinalize(UserInterface $account) {
    user_login_finalize($account);
  }

  /**
   * Dispatch an event when authentication in provider fails.
   *
   * @param string|null $error
   *   The error string/code from provider.
   *
   * @return \Symfony\Component\HttpFoundation\RedirectResponse
   *   Return redirect response.
   */
  public function dispatchAuthenticationError($error = NULL) {
    $event = new FailedAuthenticationEvent($this->dataHandler, $this
      ->getPluginId(), $error ?? NULL);
    $this->eventDispatcher
      ->dispatch(SocialAuthEvents::FAILED_AUTH, $event);
    if ($event
      ->hasResponse()) {
      return $event
        ->getResponse();
    }
    return NULL;
  }

  /**
   * Dispatch an event before user is redirected to the provider.
   *
   * @param string|null $destination
   *   The destination url.
   */
  public function dispatchBeforeRedirect($destination = NULL) {
    $event = new BeforeRedirectEvent($this->dataHandler, $this
      ->getPluginId(), $destination);
    $this->eventDispatcher
      ->dispatch(SocialAuthEvents::BEFORE_REDIRECT, $event);
  }

}

Classes

Name	Description
UserAuthenticator	Manages Drupal authentication tasks for Social Auth.