/**
* Validates given username.
*
* @param string $userName
*
* @return string Validated username (trimmed and filtered)
* @throws Exception If username is not valid
*/
public function validateUserName($userName)
{
$userName = trim($userName);
// check for valid characters:
if (strlen($userName) == 0 || !preg_match('/^[a-zA-Z0-9\\-_ ]+$/', $userName)) {
throw new Exception($this->options->getOption('message_error_1', 'Only letters, number, spaces, hyphens and underscores are allowed'));
}
// filter the new username:
if ($this->options->isOptionEnabled('filter_bad_words')) {
WiseChatContainer::load('rendering/filters/pre/WiseChatFilter');
$userName = WiseChatFilter::filter($userName);
}
// check if the new username is already occupied:
$occupiedException = new Exception($this->options->getOption('message_error_2', 'This name is already occupied'));
$prefix = $this->options->getOption('user_name_prefix', 'Anonymous');
if ($this->getUserNameOrEmptyString() == $userName || $this->usersDAO->getWpUserByDisplayName($userName) !== null || $this->usersDAO->getWpUserByLogin($userName) !== null || $this->channelUsersDAO->isUserNameOccupied($userName, $this->userSessionDAO->getSessionId()) || preg_match("/^{$prefix}/", $userName) || $userName == $this->getSystemUser()->getName()) {
throw $occupiedException;
}
return $userName;
}
