UpdateTradePacket.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;
 
use pmmp\encoding\Byte;
use pmmp\encoding\ByteBufferReader;
use pmmp\encoding\ByteBufferWriter;
use pmmp\encoding\VarInt;
use pocketmine\network\mcpe\protocol\serializer\CommonTypes;
use pocketmine\network\mcpe\protocol\types\CacheableNbt;
use pocketmine\network\mcpe\protocol\types\inventory\WindowTypes;
 
class UpdateTradePacket extends DataPacket implements ClientboundPacket{
    public const NETWORK_ID = ProtocolInfo::UPDATE_TRADE_PACKET;
 
    public int $windowId;
    public int $windowType = WindowTypes::TRADING; //Mojang hardcoded this -_-
    public int $windowSlotCount = 0; //useless, seems to be part of a standard container header
    public int $tradeTier;
    public int $traderActorUniqueId;
    public int $playerActorUniqueId;
    public string $displayName;
    public bool $isV2Trading;
    public bool $isEconomyTrading;
    public CacheableNbt $offers;
 
    public static function create(
        int $windowId,
        int $windowType,
        int $windowSlotCount,
        int $tradeTier,
        int $traderActorUniqueId,
        int $playerActorUniqueId,
        string $displayName,
        bool $isV2Trading,
        bool $isEconomyTrading,
        CacheableNbt $offers,
    ) : self{
        $result = new self;
        $result->windowId = $windowId;
        $result->windowType = $windowType;
        $result->windowSlotCount = $windowSlotCount;
        $result->tradeTier = $tradeTier;
        $result->traderActorUniqueId = $traderActorUniqueId;
        $result->playerActorUniqueId = $playerActorUniqueId;
        $result->displayName = $displayName;
        $result->isV2Trading = $isV2Trading;
        $result->isEconomyTrading = $isEconomyTrading;
        $result->offers = $offers;
        return $result;
    }
 
    protected function decodePayload(ByteBufferReader $in) : void{
        $this->windowId = Byte::readUnsigned($in);
        $this->windowType = Byte::readUnsigned($in);
        $this->windowSlotCount = VarInt::readSignedInt($in);
        $this->tradeTier = VarInt::readSignedInt($in);
        $this->traderActorUniqueId = CommonTypes::getActorUniqueId($in);
        $this->playerActorUniqueId = CommonTypes::getActorUniqueId($in);
        $this->displayName = CommonTypes::getString($in);
        $this->isV2Trading = CommonTypes::getBool($in);
        $this->isEconomyTrading = CommonTypes::getBool($in);
        $this->offers = new CacheableNbt(CommonTypes::getNbtCompoundRoot($in));
    }
 
    protected function encodePayload(ByteBufferWriter $out) : void{
        Byte::writeUnsigned($out, $this->windowId);
        Byte::writeUnsigned($out, $this->windowType);
        VarInt::writeSignedInt($out, $this->windowSlotCount);
        VarInt::writeSignedInt($out, $this->tradeTier);
        CommonTypes::putActorUniqueId($out, $this->traderActorUniqueId);
        CommonTypes::putActorUniqueId($out, $this->playerActorUniqueId);
        CommonTypes::putString($out, $this->displayName);
        CommonTypes::putBool($out, $this->isV2Trading);
        CommonTypes::putBool($out, $this->isEconomyTrading);
        $out->writeByteArray($this->offers->getEncodedNbt());
    }
 
    public function handle(PacketHandlerInterface $handler) : bool{
        return $handler->handleUpdateTrade($this);
    }
}