RecipeUnlockingRequirement.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 pocketmine\network\mcpe\protocol\serializer\PacketSerializer;
use function count;
 
final class RecipeUnlockingRequirement{
 
    public function __construct(
        private ?array $unlockingIngredients
    ){}
 
    public function getUnlockingIngredients() : ?array{ return $this->unlockingIngredients; }
 
    public static function read(PacketSerializer $in) : self{
        //I don't know what the point of this structure is. It could easily have been a list<RecipeIngredient> instead.
        //It's basically just an optional list, which could have been done by an empty list wherever it's not needed.
        $unlockingContext = $in->getBool();
        $unlockingIngredients = null;
        if(!$unlockingContext){
            $unlockingIngredients = [];
            for($i = 0, $count = $in->getUnsignedVarInt(); $i < $count; $i++){
                $unlockingIngredients[] = $in->getRecipeIngredient();
            }
        }
 
        return new self($unlockingIngredients);
    }
 
    public function write(PacketSerializer $out) : void{
        $out->putBool($this->unlockingIngredients === null);
        if($this->unlockingIngredients !== null){
            $out->putUnsignedVarInt(count($this->unlockingIngredients));
            foreach($this->unlockingIngredients as $ingredient){
                $out->putRecipeIngredient($ingredient);
            }
        }
    }
}