<?php

/**
 * Copyright 2017-2020 Nick Korbel
 *
 * This file is part of Booked Scheduler.
 *
 * Booked Scheduler is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Booked Scheduler is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Booked Scheduler.  If not, see <http://www.gnu.org/licenses/>.
 */

class CSRFToken
{
    /**
     * @var string
     */
    public static $_Token;

    /**
     * @return string
     */
    public static function Create()
    {
        if (!empty(self::$_Token)) {
            return self::$_Token;
        }

        return base64_encode(md5(BookedStringHelper::Random()));
    }
}