Method hasCredentials

/**
 * Method to determine if client login credentials are present
 *
 * @param   string  $client  Client name, currently only 'ftp' is supported
 *
 * @return  boolean  True if login credentials are available
 *
 * @since   1.7.0
 */
public static function hasCredentials($client)
{
    $return = false;
    $client = strtolower($client);
    // Get (unmodified) credentials for this client
    switch ($client) {
        case 'ftp':
            $app = Factory::getApplication();
            $options = array('enabled' => $app->get('ftp_enable'), 'user' => $app->get('ftp_user'), 'pass' => $app->get('ftp_pass'));
            break;
        default:
            $options = array('enabled' => false, 'user' => '', 'pass' => '');
            break;
    }
    if ($options['enabled'] == false) {
        // The client is disabled in global config, so let's pretend we are OK
        $return = true;
    } elseif ($options['user'] != '' && $options['pass'] != '') {
        // Login credentials are available in global config
        $return = true;
    } else {
        // Check if login credentials are available in the session
        $session = Factory::getSession();
        $user = $session->get($client . '.user', null, 'JClientHelper');
        $pass = $session->get($client . '.pass', null, 'JClientHelper');
        if ($user != '' && $pass != '') {
            $return = true;
        }
    }
    return $return;
}