From d8bba6ed3decc7388c0fad650164716368511259 Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <dktapps@pmmp.io>
Date: Thu, 23 Jun 2022 16:55:50 +0100
Subject: [PATCH] git add -p bites again

---
 .../block/upgrade/BlockDataUpgrader.php       | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 src/data/bedrock/block/upgrade/BlockDataUpgrader.php

diff --git a/src/data/bedrock/block/upgrade/BlockDataUpgrader.php b/src/data/bedrock/block/upgrade/BlockDataUpgrader.php
new file mode 100644
index 000000000..63faa3532
--- /dev/null
+++ b/src/data/bedrock/block/upgrade/BlockDataUpgrader.php
@@ -0,0 +1,63 @@
+<?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\upgrade;
+
+use pocketmine\data\bedrock\block\BlockStateData;
+use pocketmine\data\bedrock\block\BlockTypeNames;
+use pocketmine\nbt\tag\CompoundTag;
+
+final class BlockDataUpgrader{
+
+	public function __construct(
+		private LegacyBlockStateMapper $legacyBlockStateMapper,
+		private BlockStateUpgrader $blockStateUpgrader
+	){}
+
+	public function upgradeIntIdMeta(int $id, int $meta) : ?BlockStateData{
+		return $this->legacyBlockStateMapper->fromIntIdMeta($id, $meta);
+	}
+
+	public function upgradeStringIdMeta(string $id, int $meta) : ?BlockStateData{
+		return $this->legacyBlockStateMapper->fromStringIdMeta($id, $meta);
+	}
+
+	public function upgradeBlockStateNbt(CompoundTag $tag) : ?BlockStateData{
+		if($tag->getTag("name") !== null && $tag->getTag("val") !== null){
+			//Legacy (pre-1.13) blockstate - upgrade it to a version we understand
+			$id = $tag->getString("name");
+			$data = $tag->getShort("val");
+
+			$blockStateData = $this->upgradeStringIdMeta($id, $data);
+			if($blockStateData === null){
+				//unknown block, invalid ID
+				$blockStateData = new BlockStateData(BlockTypeNames::INFO_UPDATE, CompoundTag::create(), BlockStateData::CURRENT_VERSION);
+			}
+		}else{
+			//Modern (post-1.13) blockstate
+			$blockStateData = BlockStateData::fromNbt($tag);
+		}
+
+		return $this->blockStateUpgrader->upgrade($blockStateData);
+	}
+}