function fb_connect_user in Drupal for Facebook 6.2

Same name and namespace in other branches

1. 5.2 fb_connect.module \fb_connect_user()

Implementation of hook_user

On logout, redirect the user so facebook can expire their session. Should be a facebook API to do this, but there's none I know of.

File

./fb_connect.module, line 291

Support for Facebook Connect features

Code

function fb_connect_user($op, &$edit, &$account, $category = NULL) {
  if ($op == 'logout') {

    // Affect connect pages, but not canvas pages.
    if (fb_is_fbml_canvas() || fb_is_iframe_canvas()) {
      return;
    }
    $apps = fb_connect_enabled_apps();
    foreach ($apps as $fb_app) {
      try {
        $fb = fb_api_init($fb_app, FB_FBU_CURRENT);
        if ($fb && $fb->api_client->session_key) {

          // Log out of facebook
          $session_key = $fb->api_client->session_key;

          // Figure out where to send the user.
          if ($_REQUEST['destination']) {
            $next = url($_REQUEST['destination'], array(
              'absolute' => TRUE,
            ));

            // It pains me to muck with $_REQUEST['destination'], but facebook's weak-ass API leaves us little choice.
            unset($_REQUEST['destination']);
          }
          else {
            $next = url('<front>', array(
              'absolute' => TRUE,
            ));
          }

          // http://forum.developers.facebook.com/viewtopic.php?id=21879
          // Use next parameter to expire session.
          drupal_goto("http://www.facebook.com/logout.php?app_key={$fb_app->apikey}&session_key={$session_key}&next=" . $next);
        }
      } catch (Exception $e) {
        fb_log_exception($e, t('Failed to log out of fbConnect session'));
      }
    }
  }
}