OptionSetFromIntProperty.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program 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.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\data\bedrock\block\convert\property;
 
use pocketmine\data\bedrock\block\convert\BlockStateReader;
use pocketmine\data\bedrock\block\convert\BlockStateWriter;
use pocketmine\utils\AssumptionFailedError;
 
class OptionSetFromIntProperty implements Property{
 
    private int $maxValue = 0;
 
    public function __construct(
        private string $name,
        private StateMap $map,
        private \Closure $getter,
        private \Closure $setter
    ){
        $flagsToCases = $this->map->getRawToValueMap();
        foreach($flagsToCases as $possibleFlag => $option){
            if(($this->maxValue & $possibleFlag) !== 0){
                foreach($flagsToCases as $otherFlag => $otherOption){
                    if(($possibleFlag & $otherFlag) === $otherFlag && $otherOption !== $option){
                        $printableOption = $this->map->printableValue($option);
                        $printableOtherOption = $this->map->printableValue($otherOption);
                        throw new \InvalidArgumentException("Flag for option $printableOption overlaps with flag for option $printableOtherOption in property $this->name");
                    }
                }
 
                throw new AssumptionFailedError("Unreachable");
            }
 
            $this->maxValue |= $possibleFlag;
        }
    }
 
    public function getName() : string{ return $this->name; }
 
    public function deserialize(object $block, BlockStateReader $in) : void{
        $flags = $in->readBoundedInt($this->name, 0, $this->maxValue);
 
        $value = [];
        foreach($this->map->getRawToValueMap() as $possibleFlag => $option){
            if(($flags & $possibleFlag) === $possibleFlag){
                $value[] = $option;
            }
        }
 
        ($this->setter)($block, $value);
    }
 
    public function serialize(object $block, BlockStateWriter $out) : void{
        $flags = 0;
 
        $value = ($this->getter)($block);
        foreach($value as $option){
            $flags |= $this->map->valueToRaw($option);
        }
 
        $out->writeInt($this->name, $flags);
    }
}