Generator.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\world\generator;
 
use pocketmine\utils\Random;
use pocketmine\utils\Utils;
use pocketmine\world\ChunkManager;
use function preg_match;
 
abstract class Generator{
 
    public static function convertSeed(string $seed) : ?int{
        if($seed === ""){ //empty seed should cause a random seed to be selected - can't use 0 here because 0 is a valid seed
            $convertedSeed = null;
        }elseif(preg_match('/^-?\d+$/', $seed) === 1){ //this avoids treating seeds like "404.4" as integer seeds
            $convertedSeed = (int) $seed;
        }else{
            $convertedSeed = Utils::javaStringHash($seed);
        }
 
        return $convertedSeed;
    }
 
    protected Random $random;
 
    public function __construct(
        protected int $seed,
        protected string $preset
    ){
        $this->random = new Random($seed);
    }
 
    abstract public function generateChunk(ChunkManager $world, int $chunkX, int $chunkZ) : void;
 
    abstract public function populateChunk(ChunkManager $world, int $chunkX, int $chunkZ) : void;
}