Николаевич

public function joinGroup($groupId,$roleId = null,$rank = null) {
...
}

switch ($modx->event->name) {
    case 'OnBeforeCommentSave':
        $text = preg_replace('/[[:^print:]]/', '', $_POST['text']);
    	$modx->event->params['TicketComment']->set('text', $text);
    break;

    case 'OnBeforeDocFormSave':
        $content = preg_replace('/[[:^print:]]/', '', $resource->content);
    	$resource->set('content', $content);
    break;
}

[#147] Added an javascript events on save and preview comments and tickets

$resource = $modx->getObject('modResource', array('uri' => $uri));

$uri = explode('?', $uri, 2);
$resource = $modx->getObject('modResource', array('uri' => $uri[0]));