IntIdMetaItemDescriptor.php

<?php
 
/*
 * This file is part of BedrockProtocol.
 * Copyright (C) 2014-2022 PocketMine Team <https://github.com/pmmp/BedrockProtocol>
 *
 * BedrockProtocol 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.
 */
 
declare(strict_types=1);
 
namespace pocketmine\network\mcpe\protocol\types\recipe;
 
use pmmp\encoding\ByteBufferReader;
use pmmp\encoding\ByteBufferWriter;
use pmmp\encoding\LE;
use pocketmine\network\mcpe\protocol\types\GetTypeIdFromConstTrait;
 
final class IntIdMetaItemDescriptor implements ItemDescriptor{
    use GetTypeIdFromConstTrait;
 
    public const ID = ItemDescriptorType::INT_ID_META;
 
    public function __construct(
        private int $id,
        private int $meta
    ){
        if($id === 0 && $meta !== 0){
            throw new \InvalidArgumentException("Meta cannot be non-zero for air");
        }
    }
 
    public function getId() : int{ return $this->id; }
 
    public function getMeta() : int{ return $this->meta; }
 
    public static function read(ByteBufferReader $in) : self{
        $id = LE::readSignedShort($in);
        if($id !== 0){
            $meta = LE::readSignedShort($in);
        }else{
            $meta = 0;
        }
 
        return new self($id, $meta);
    }
 
    public function write(ByteBufferWriter $out) : void{
        LE::writeSignedShort($out, $this->id);
        if($this->id !== 0){
            LE::writeSignedShort($out, $this->meta);
        }
    }
}