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   1  <?php
   2  
   3  namespace dokuwiki\Action;
   4  
   5  use dokuwiki\Action\Exception\ActionDisabledException;
   6  use dokuwiki\Action\Exception\ActionException;
   7  use dokuwiki\Extension\AuthPlugin;
   8  
   9  /**
  10   * Class Logout
  11   *
  12   * Log out a user
  13   *
  14   * @package dokuwiki\Action
  15   */
  16  class Logout extends AbstractUserAction
  17  {
  18      /** @inheritdoc */
  19      public function minimumPermission()
  20      {
  21          return AUTH_NONE;
  22      }
  23  
  24      /** @inheritdoc */
  25      public function checkPreconditions()
  26      {
  27          parent::checkPreconditions();
  28  
  29          /** @var AuthPlugin $auth */
  30          global $auth;
  31          if (!$auth->canDo('logout')) throw new ActionDisabledException();
  32      }
  33  
  34      /** @inheritdoc */
  35      public function preProcess()
  36      {
  37          global $ID;
  38          global $INPUT;
  39  
  40          if (!checkSecurityToken()) throw new ActionException();
  41  
  42          // when logging out during an edit session, unlock the page
  43          $lockedby = checklock($ID);
  44          if ($lockedby == $INPUT->server->str('REMOTE_USER')) {
  45              unlock($ID);
  46          }
  47  
  48          // do the logout stuff and redirect to login
  49          auth_logoff();
  50          send_redirect(wl($ID, ['do' => 'login'], true, '&'));
  51  
  52          // should never be reached
  53          throw new ActionException('login');
  54      }
  55  }