// if (module_enabled('form') && !Form::checkSpamToken(SITEUSER_FORM_SPAM_TOKEN)) {
// $messages[] = new Message(Message::DANGER, i18n(array(
// 'en' => 'Form expired. Please try submit again',
// 'zh' => '表单超时，请重新尝试提交表单'
// )));
// }
// }
// username
if (isset($username)) {
if (trim($username) == '') {
$messages[] = new Message(Message::DANGER, i18n(array('en' => 'Please enter your username', 'zh' => '请填写用户名')));
} else {
if (!preg_match('/^[a-zA-Z0-9_]+$/', $username)) {
$messages[] = new Message(Message::DANGER, i18n(array('en' => 'Username needs to be composed by alphabetically letters or underscore', 'zh' => '用户名必须为英文字母或者下划线')));
} else {
if ($user = SiteUser::findByUsername($username)) {
// when create new user, we check if there is an existing one
if (empty($uid)) {
$messages[] = new Message(Message::DANGER, i18n(array('en' => 'This username has already been registered. Please choose a different username', 'zh' => '该用户名已被注册，请尝试其他用户名')));
} else {
// when update existing user, we check if the username is duplicated
if ($user->getId() != $uid) {
$messages[] = new Message(Message::DANGER, i18n(array('en' => 'This username has already been registered. Please choose a different username', 'zh' => '该用户名已被注册，请尝试其他用户名')));
}
}
}
}
}
}
// email
if (is_null($email)) {
