DisconnectPacket.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\ByteBufferReader;
use pmmp\encoding\ByteBufferWriter;
use pmmp\encoding\VarInt;
use pocketmine\network\mcpe\protocol\serializer\CommonTypes;
 
class DisconnectPacket extends DataPacket implements ClientboundPacket, ServerboundPacket{
    public const NETWORK_ID = ProtocolInfo::DISCONNECT_PACKET;
 
    public int $reason; //TODO: add constants / enum
    public ?string $message;
    public ?string $filteredMessage;
 
    public static function create(int $reason, ?string $message, ?string $filteredMessage) : self{
        $result = new self;
        $result->reason = $reason;
        $result->message = $message;
        $result->filteredMessage = $filteredMessage;
        return $result;
    }
 
    public function canBeSentBeforeLogin() : bool{
        return true;
    }
 
    protected function decodePayload(ByteBufferReader $in) : void{
        $this->reason = VarInt::readSignedInt($in);
        $type = VarInt::readUnsignedInt($in);
        $this->message = $type === 0 ? CommonTypes::getString($in) : null;
        $this->filteredMessage = $type === 0 ? CommonTypes::getString($in) : null;
    }
 
    protected function encodePayload(ByteBufferWriter $out) : void{
        VarInt::writeSignedInt($out, $this->reason);
        VarInt::writeUnsignedInt($out, ($skipMessage = $this->message === null && $this->filteredMessage === null) ? 1 : 0);
        if(!$skipMessage){
            CommonTypes::putString($out, $this->message ?? "");
            CommonTypes::putString($out, $this->filteredMessage ?? "");
        }
    }
 
    public function handle(PacketHandlerInterface $handler) : bool{
        return $handler->handleDisconnect($this);
    }
}