<?php
// Pandora FMS - http://pandorafms.com
// ==================================================
// Copyright (c) 2005-2021 Artica Soluciones Tecnologicas
// Please see http://pandorafms.org for full contribution list
// This program 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 for version 2.
// This program 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.
// Singleton
class DB
{

    private static $instance;

    private $system;

    private $engine;


    public function __construct($engine='mysql')
    {
        $this->system = &$system;
        $this->engine = $engine;

        switch ($engine) {
            case 'mysql':
                // NONE
            break;
        }
    }


    public static function getInstance($engine='mysql')
    {
        if (!(self::$instance instanceof self)) {
            self::$instance = new self($engine);
        }

        return self::$instance;
    }


}