public function addActivity()
{
// Build the story for the activity.
$Header = $this->getImportHeader();
$PorterVersion = val('Vanilla Export', $Header, t('unknown'));
$SourceData = val('Source', $Header, t('unknown'));
$Story = sprintf(t('Vanilla Export: %s, Source: %s'), $PorterVersion, $SourceData);
$ActivityModel = new ActivityModel();
$ActivityModel->add(Gdn::session()->UserID, 'Import', $Story);
return true;
}