misc_pterodactyl-panel/app/Services/UuidService.php

<?php
/**
 * Pterodactyl - Panel
 * Copyright (c) 2015 - 2016 Dane Everitt <dane@daneeveritt.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
namespace Pterodactyl\Services;

use DB;
use Uuid;

class UuidService
{

    /**
     * Constructor
     */
    public function __construct()
    {
        //
    }

    /**
     * Generate a unique UUID validating against specified table and column.
     * Defaults to `users.uuid`
     *
     * @param  string $table
     * @param  string $field
     * @param  integer $type The type of UUID to generate.
     * @return string
     */
    public function generate($table = 'users', $field = 'uuid', $type = 4)
    {

        $return = false;
        do {

            $uuid = Uuid::generate($type);
            if (!DB::table($table)->where($field, $uuid)->exists()) {
                $return = $uuid;
            }

        } while (!$return);

        return $return;

    }

    /**
     * Generates a ShortUUID code which is 8 characters long and is used for identifying servers in the system.
     *
     * @param string $table
     * @param string $field
     * @return string
     */
    public function generateShort($table = 'servers', $field = 'uuidShort', $attachedUuid = null)
    {

        $return = false;
        do {

            $short = (is_null($attachedUuid)) ? substr(Uuid::generate(4), 0, 8) : substr($attachedUuid, 0, 8);
            $attachedUuid = null;

            if (!DB::table($table)->where($field, $short)->exists()) {
                $return = $short;
            }

        } while (!$return);

        return $return;

    }

}