BlockStateUpgrader: do not use blockstate version to manage internal schemas

these are no longer reliable.

src/data/bedrock/block/upgrade/BlockStateUpgradeSchema.php

@@ -69,14 +69,18 @@ final class BlockStateUpgradeSchema{
 		public int $maxVersionMinor,
 		public int $maxVersionPatch,
 		public int $maxVersionRevision,
-		private int $priority
+		private int $schemaId
 	){}
 
+	/**
+	 * @deprecated This is defined by Mojang, and therefore cannot be relied on. Use getSchemaId() instead for
+	 * internal version management.
+	 */
 	public function getVersionId() : int{
 		return ($this->maxVersionMajor << 24) | ($this->maxVersionMinor << 16) | ($this->maxVersionPatch << 8) | $this->maxVersionRevision;
 	}
 
-	public function getPriority() : int{ return $this->priority; }
+	public function getSchemaId() : int{ return $this->schemaId; }
 
 	public function isEmpty() : bool{
 		foreach([

src/data/bedrock/block/upgrade/BlockStateUpgradeSchemaUtils.php

@@ -110,13 +110,13 @@ final class BlockStateUpgradeSchemaUtils{
 		};
 	}
 
-	public static function fromJsonModel(BlockStateUpgradeSchemaModel $model, int $priority) : BlockStateUpgradeSchema{
+	public static function fromJsonModel(BlockStateUpgradeSchemaModel $model, int $schemaId) : BlockStateUpgradeSchema{
 		$result = new BlockStateUpgradeSchema(
 			$model->maxVersionMajor,
 			$model->maxVersionMinor,
 			$model->maxVersionPatch,
 			$model->maxVersionRevision,
-			$priority
+			$schemaId
 		);
 		$result->renamedIds = $model->renamedIds ?? [];
 		$result->renamedProperties = $model->renamedProperties ?? [];
@@ -250,11 +250,11 @@ final class BlockStateUpgradeSchemaUtils{
 	}
 
 	/**
-	 * Returns a list of schemas ordered by priority. Oldest schemas appear first.
+	 * Returns a list of schemas ordered by schema ID. Oldest schemas appear first.
 	 *
 	 * @return BlockStateUpgradeSchema[]
 	 */
-	public static function loadSchemas(string $path, int $currentVersion) : array{
+	public static function loadSchemas(string $path, int $maxSchemaId) : array{
 		$iterator = new \RegexIterator(
 			new \FilesystemIterator(
 				$path,
@@ -270,32 +270,30 @@ final class BlockStateUpgradeSchemaUtils{
 		/** @var string[] $matches */
 		foreach($iterator as $matches){
 			$filename = $matches[0];
-			$priority = (int) $matches[1];
+			$schemaId = (int) $matches[1];
+
+			if($schemaId > $maxSchemaId){
+				continue;
+			}
 
 			$fullPath = Path::join($path, $filename);
 
 			$raw = Filesystem::fileGetContents($fullPath);
 
 			try{
-				$schema = self::loadSchemaFromString($raw, $priority);
+				$schema = self::loadSchemaFromString($raw, $schemaId);
 			}catch(\RuntimeException $e){
 				throw new \RuntimeException("Loading schema file $fullPath: " . $e->getMessage(), 0, $e);
 			}
 
-			if($schema->getVersionId() > $currentVersion){
+			$result[$schemaId] = $schema;
-				//this might be a beta schema which shouldn't be applicable
-				//TODO: why do we load the whole schema just to throw it away if it's too new? ...
-				continue;
-			}
-
-			$result[$priority] = $schema;
 		}
 
 		ksort($result, SORT_NUMERIC);
 		return $result;
 	}
 
-	public static function loadSchemaFromString(string $raw, int $priority) : BlockStateUpgradeSchema{
+	public static function loadSchemaFromString(string $raw, int $schemaId) : BlockStateUpgradeSchema{
 		try{
 			$json = json_decode($raw, false, flags: JSON_THROW_ON_ERROR);
 		}catch(\JsonException $e){
@@ -312,6 +310,6 @@ final class BlockStateUpgradeSchemaUtils{
 			throw new \RuntimeException($e->getMessage(), 0, $e);
 		}
 
-		return self::fromJsonModel($model, $priority);
+		return self::fromJsonModel($model, $schemaId);
 	}
 }

src/data/bedrock/block/upgrade/BlockStateUpgrader.php

@@ -31,7 +31,7 @@ use function ksort;
 use const SORT_NUMERIC;
 
 final class BlockStateUpgrader{
-	/** @var BlockStateUpgradeSchema[][] */
+	/** @var BlockStateUpgradeSchema[] */
 	private array $upgradeSchemas = [];
 
 	/**
@@ -45,28 +45,24 @@ final class BlockStateUpgrader{
 	}
 
 	public function addSchema(BlockStateUpgradeSchema $schema) : void{
-		$schemaList = $this->upgradeSchemas[$schema->getVersionId()] ?? [];
+		$schemaId = $schema->getSchemaId();
-
+		if(isset($this->upgradeSchemas[$schemaId])){
-		$priority = $schema->getPriority();
+			throw new \InvalidArgumentException("Cannot add two schemas with the same schema ID");
-		if(isset($schemaList[$priority])){
-			throw new \InvalidArgumentException("Cannot add two schemas to the same version with the same priority");
 		}
-		$schemaList[$priority] = $schema;
+		$this->upgradeSchemas[$schemaId] = $schema;
-		ksort($schemaList, SORT_NUMERIC);
-		$this->upgradeSchemas[$schema->getVersionId()] = $schemaList;
 
 		ksort($this->upgradeSchemas, SORT_NUMERIC);
 	}
 
 	public function upgrade(BlockStateData $blockStateData) : BlockStateData{
 		$version = $blockStateData->getVersion();
-		foreach($this->upgradeSchemas as $resultVersion => $schemas){
+		foreach($this->upgradeSchemas as $schema){
+			$resultVersion = $schema->getVersionId();
 			if($version > $resultVersion){
 				//even if this is actually the same version, we have to apply it anyway because mojang are dumb and
 				//didn't always bump the blockstate version when changing it :(
 				continue;
 			}
-			foreach($schemas as $schema){
 			$oldName = $blockStateData->getName();
 			$oldState = $blockStateData->getStates();
 			if(isset($schema->remappedStates[$oldName])){
@@ -99,7 +95,6 @@ final class BlockStateUpgrader{
 				//don't break out; we may need to further upgrade the state
 			}
 		}
-		}
 
 		return $blockStateData;
 	}

src/world/format/io/GlobalBlockStateHandlers.php

@@ -43,6 +43,7 @@ use const pocketmine\BEDROCK_BLOCK_UPGRADE_SCHEMA_PATH;
  * benefits for now.
  */
 final class GlobalBlockStateHandlers{
+	public const MAX_BLOCKSTATE_UPGRADE_SCHEMA_ID = 151; //https://github.com/pmmp/BedrockBlockUpgradeSchema/blob/b0cc441e029cf5a6de5b05dd0f5657208855232b/nbt_upgrade_schema/0151_1.19.0.34_beta_to_1.19.20.json
 
 	private static ?BlockObjectToStateSerializer $blockStateSerializer = null;
 
@@ -64,7 +65,7 @@ final class GlobalBlockStateHandlers{
 		if(self::$blockDataUpgrader === null){
 			$blockStateUpgrader = new BlockStateUpgrader(BlockStateUpgradeSchemaUtils::loadSchemas(
 				Path::join(BEDROCK_BLOCK_UPGRADE_SCHEMA_PATH, 'nbt_upgrade_schema'),
-				BlockStateData::CURRENT_VERSION
+				self::MAX_BLOCKSTATE_UPGRADE_SCHEMA_ID
 			));
 			self::$blockDataUpgrader = new BlockDataUpgrader(
 				BlockIdMetaUpgrader::loadFromString(