/**
* Check whether the current user backend is valid, i.e. it's enabled, not an external user backend and whether its
* config is valid
*
* @return bool
*/
public function valid()
{
if (!$this->config->valid()) {
// Stop when there are no more backends to check
return false;
}
$backendConfig = $this->config->current();
if ((bool) $backendConfig->get('disabled', false)) {
$this->next();
return $this->valid();
}
$name = $this->key();
try {
$backend = UserBackend::create($name, $backendConfig);
} catch (ConfigurationError $e) {
Logger::error(new ConfigurationError('Can\'t create authentication backend "%s". An exception was thrown:', $name, $e));
$this->next();
return $this->valid();
}
if ($this->getSkipExternalBackends() && $backend instanceof ExternalBackend) {
$this->next();
return $this->valid();
}
$this->currentBackend = $backend;
return true;
}