BookEditPacket.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 pocketmine\network\mcpe\protocol\serializer\CommonTypes;
 
class BookEditPacket extends DataPacket implements ServerboundPacket{
    public const NETWORK_ID = ProtocolInfo::BOOK_EDIT_PACKET;
 
    public const TYPE_REPLACE_PAGE = 0;
    public const TYPE_ADD_PAGE = 1;
    public const TYPE_DELETE_PAGE = 2;
    public const TYPE_SWAP_PAGES = 3;
    public const TYPE_SIGN_BOOK = 4;
 
    public int $type;
    public int $inventorySlot;
    public int $pageNumber;
    public int $secondaryPageNumber;
    public string $text;
    public string $photoName;
    public string $title;
    public string $author;
    public string $xuid;
 
    protected function decodePayload(ByteBufferReader $in) : void{
        $this->type = Byte::readUnsigned($in);
        $this->inventorySlot = Byte::readUnsigned($in);
 
        switch($this->type){
            case self::TYPE_REPLACE_PAGE:
            case self::TYPE_ADD_PAGE:
                $this->pageNumber = Byte::readUnsigned($in);
                $this->text = CommonTypes::getString($in);
                $this->photoName = CommonTypes::getString($in);
                break;
            case self::TYPE_DELETE_PAGE:
                $this->pageNumber = Byte::readUnsigned($in);
                break;
            case self::TYPE_SWAP_PAGES:
                $this->pageNumber = Byte::readUnsigned($in);
                $this->secondaryPageNumber = Byte::readUnsigned($in);
                break;
            case self::TYPE_SIGN_BOOK:
                $this->title = CommonTypes::getString($in);
                $this->author = CommonTypes::getString($in);
                $this->xuid = CommonTypes::getString($in);
                break;
            default:
                throw new PacketDecodeException("Unknown book edit type $this->type!");
        }
    }
 
    protected function encodePayload(ByteBufferWriter $out) : void{
        Byte::writeUnsigned($out, $this->type);
        Byte::writeUnsigned($out, $this->inventorySlot);
 
        switch($this->type){
            case self::TYPE_REPLACE_PAGE:
            case self::TYPE_ADD_PAGE:
                Byte::writeUnsigned($out, $this->pageNumber);
                CommonTypes::putString($out, $this->text);
                CommonTypes::putString($out, $this->photoName);
                break;
            case self::TYPE_DELETE_PAGE:
                Byte::writeUnsigned($out, $this->pageNumber);
                break;
            case self::TYPE_SWAP_PAGES:
                Byte::writeUnsigned($out, $this->pageNumber);
                Byte::writeUnsigned($out, $this->secondaryPageNumber);
                break;
            case self::TYPE_SIGN_BOOK:
                CommonTypes::putString($out, $this->title);
                CommonTypes::putString($out, $this->author);
                CommonTypes::putString($out, $this->xuid);
                break;
            default:
                throw new \InvalidArgumentException("Unknown book edit type $this->type!");
        }
    }
 
    public function handle(PacketHandlerInterface $handler) : bool{
        return $handler->handleBookEdit($this);
    }
}