Class with utilities to unfuck serialized NBT objects from before PocketMine-MP API 3.0.0-ALPHA11

SerializedNbtFixer.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 dktapps\SerializedNbtFixer;

use pocketmine\nbt\tag\CompoundTag;
use pocketmine\nbt\tag\ListTag;
use pocketmine\nbt\tag\NamedTag;

class SerializedNbtFixer{
	public static function fixSerializedCompoundTag(CompoundTag $tag) : CompoundTag{
		$result = new CompoundTag($tag->getName());
		$properties = (new \ReflectionObject($tag))->getProperties(\ReflectionProperty::IS_PUBLIC);

		foreach($properties as $property){
			$child = $property->getValue($tag);
			if($child instanceof NamedTag){
				$result->setTag(self::processSerializedNamedTag($child));
			}
		}

		return $result;
	}

	public static function fixSerializedListTag(ListTag $tag) : ListTag{
		$properties = (new \ReflectionObject($tag))->getProperties(\ReflectionProperty::IS_PUBLIC);

		$result = [];
		foreach($properties as $i => $property){
			$child = $property->getValue($tag);
			if($child instanceof NamedTag and is_numeric($property->getName())){
				$result[(int) $i] = self::processSerializedNamedTag($child);
			}
		}

		return new ListTag($tag->getName(), $result);
	}

	public static function processSerializedNamedTag(NamedTag $tag) : NamedTag{
		if($tag instanceof CompoundTag){
			return self::fixSerializedCompoundTag($tag);
		}elseif($tag instanceof ListTag){
			return self::fixSerializedListTag($tag);
		}else{
			return $tag;
		}
	}
}