setHTMLTitle("Benutzer");
    $HTML->importSeitenInhalt("users.html");
    if(!isset($_SESSION['LOGIN']) || !isset($_SESSION['LEVEL']) || $_SESSION['LEVEL'] < 100)
    {
        $HTML->setHTMLTitle("Kein Zugriff");
        $HTML->SetSeitenInhalt("Dazu hast du keine Rechte!");
        $HTML->build();
        echo $HTML->ausgabe();
        die();
    }
    include 'app/OpenSim.php';
    $opensim = new OpenSim();
    if($_SERVER['REQUEST_METHOD'] == 'POST') {
        include 'app/FormValidator.php';
        if(isset($_POST['genpw'])) {
            $validator = new FormValidator(array(
                'userid' => array('required' => true, 'regex' => '/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/')
            ));
            if($validator->isValid($_POST)) {
                $NEWPW = substr(str_shuffle(str_repeat($x='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', ceil(10/strlen($x)) )),1,10); // Generate random password (10 characters)
                $salt = bin2hex(random_bytes(16));
                $hash = md5(md5($NEWPW).':'.$salt);
                $statement = $RUNTIME['PDO']->prepare('UPDATE auth SET passwordHash = :PasswordHash, passwordSalt = :PasswordSalt WHERE UUID = :PrincipalID'); 
                $statement->execute(['PasswordHash' => $hash, 'PasswordSalt' => $salt, 'PrincipalID' => $_REQUEST['userid']]);
                
                $HTML->ReplaceSeitenInhalt("%%MESSAGE%%", '
Das Passwort für '.htmlspecialchars($opensim->getUserName($_REQUEST['userid'])).' wurde geändert. Das neue Passwort ist '.htmlspecialchars($NEWPW).'
');
            }
        }
        else if(isset($_POST['generateLink'])) {
            $validator = new FormValidator(array()); // Needed only for CSRF token validation
            if($validator->isValid($_POST)) {
                $inviteID = bin2hex(random_bytes(16));
                $link = "https://".$_SERVER['SERVER_NAME']."/index.php?page=register&code=".$inviteID;
        
                $statement = $RUNTIME['PDO']->prepare('INSERT INTO `InviteCodes` (`InviteCode`) VALUES (:InviteCode)');
                $statement->execute(['InviteCode' => $inviteID]);
                
                $HTML->ReplaceSeitenInhalt("%%link%%", $link);
            }
        }
    }
    $statement = $RUNTIME['PDO']->prepare("CREATE TABLE IF NOT EXISTS `InviteCodes` (`InviteCode` VARCHAR(64) NOT NULL, PRIMARY KEY (`InviteCode`))"); 
    $statement->execute();
    $table = '| Vorname | Nachname | Status | Aktionen | 
|---|
%%ENTRY%%
';
    
    $statement = $RUNTIME['PDO']->prepare("SELECT FirstName,LastName,UserLevel,PrincipalID FROM UserAccounts ORDER BY Created ASC");
    $statement->execute(); 
    while($row = $statement->fetch()) 
    {
        $entry = '| '.htmlspecialchars($row['FirstName']).' | '.htmlspecialchars($row['LastName']).' | '.htmlspecialchars($row['UserLevel']).' |  | 
';
        $table = str_replace("%%ENTRY%%", $entry."%%ENTRY%%", $table);
    }
    $table = str_replace("%%ENTRY%%", "", $table);
    $HTML->ReplaceSeitenInhalt("%%USER-LIST%%", $table);
    $HTML->ReplaceSeitenInhalt("%%link%%", ' '); 
    $HTML->ReplaceSeitenInhalt("%%MESSAGE%%", ' ');
    $HTML->build();
    echo $HTML->ausgabe();
?>