ItemStackResponse.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\inventory\stackresponse;
 
use pmmp\encoding\Byte;
use pmmp\encoding\ByteBufferReader;
use pmmp\encoding\ByteBufferWriter;
use pmmp\encoding\VarInt;
use pocketmine\network\mcpe\protocol\serializer\CommonTypes;
use function count;
 
final class ItemStackResponse{
 
    public const RESULT_OK = 0;
    public const RESULT_ERROR = 1;
    //TODO: there are a ton more possible result types but we don't need them yet and they are wayyyyyy too many for me
    //to waste my time on right now...
 
    public function __construct(
        private int $result,
        private int $requestId,
        private array $containerInfos = []
    ){
        if($this->result !== self::RESULT_OK && count($this->containerInfos) !== 0){
            throw new \InvalidArgumentException("Container infos must be empty if rejecting the request");
        }
    }
 
    public function getResult() : int{ return $this->result; }
 
    public function getRequestId() : int{ return $this->requestId; }
 
    public function getContainerInfos() : array{ return $this->containerInfos; }
 
    public static function read(ByteBufferReader $in) : self{
        $result = Byte::readUnsigned($in);
        $requestId = CommonTypes::readItemStackRequestId($in);
        $containerInfos = [];
        if($result === self::RESULT_OK){
            for($i = 0, $len = VarInt::readUnsignedInt($in); $i < $len; ++$i){
                $containerInfos[] = ItemStackResponseContainerInfo::read($in);
            }
        }
        return new self($result, $requestId, $containerInfos);
    }
 
    public function write(ByteBufferWriter $out) : void{
        Byte::writeUnsigned($out, $this->result);
        CommonTypes::writeItemStackRequestId($out, $this->requestId);
        if($this->result === self::RESULT_OK){
            VarInt::writeUnsignedInt($out, count($this->containerInfos));
            foreach($this->containerInfos as $containerInfo){
                $containerInfo->write($out);
            }
        }
    }
}