Add 1.21.20 BC support

src/EmotePacket.php

@@ -64,7 +64,9 @@ public function getFlags() : int{
 	protected function decodePayload(PacketSerializer $in) : void{
 		$this->actorRuntimeId = $in->getActorRuntimeId();
 		$this->emoteId = $in->getString();
-		$this->emoteLengthTicks = $in->getUnsignedVarInt();
+		if($in->getProtocolId() >= ProtocolInfo::PROTOCOL_1_21_30){
+			$this->emoteLengthTicks = $in->getUnsignedVarInt();
+		}
 		$this->xboxUserId = $in->getString();
 		$this->platformChatId = $in->getString();
 		$this->flags = $in->getByte();
@@ -73,7 +75,9 @@ protected function decodePayload(PacketSerializer $in) : void{
 	protected function encodePayload(PacketSerializer $out) : void{
 		$out->putActorRuntimeId($this->actorRuntimeId);
 		$out->putString($this->emoteId);
-		$out->putUnsignedVarInt($this->emoteLengthTicks);
+		if($out->getProtocolId() >= ProtocolInfo::PROTOCOL_1_21_30){
+			$out->putUnsignedVarInt($this->emoteLengthTicks);
+		}
 		$out->putString($this->xboxUserId);
 		$out->putString($this->platformChatId);
 		$out->putByte($this->flags);

src/ResourcePacksInfoPacket.php

@@ -15,6 +15,7 @@
 namespace pocketmine\network\mcpe\protocol;
 
 use pocketmine\network\mcpe\protocol\serializer\PacketSerializer;
+use pocketmine\network\mcpe\protocol\types\resourcepacks\BehaviorPackInfoEntry;
 use pocketmine\network\mcpe\protocol\types\resourcepacks\ResourcePackInfoEntry;
 use function count;
 
@@ -23,9 +24,12 @@ class ResourcePacksInfoPacket extends DataPacket implements ClientboundPacket{
 
 	/** @var ResourcePackInfoEntry[] */
 	public array $resourcePackEntries = [];
+	/** @var BehaviorPackInfoEntry[] */
+	public array $behaviorPackEntries = [];
 	public bool $mustAccept = false; //if true, forces client to choose between accepting packs or being disconnected
 	public bool $hasAddons = false;
 	public bool $hasScripts = false; //if true, causes disconnect for any platform that doesn't support scripts yet
+	public bool $forceServerPacks = false;
 	/**
 	 * @var string[]
 	 * @phpstan-var array<string, string>
@@ -35,15 +39,26 @@ class ResourcePacksInfoPacket extends DataPacket implements ClientboundPacket{
 	/**
 	 * @generate-create-func
 	 * @param ResourcePackInfoEntry[] $resourcePackEntries
+	 * @param BehaviorPackInfoEntry[] $behaviorPackEntries
 	 * @param string[]                $cdnUrls
 	 * @phpstan-param array<string, string> $cdnUrls
 	 */
-	public static function create(array $resourcePackEntries, bool $mustAccept, bool $hasAddons, bool $hasScripts, array $cdnUrls) : self{
+	public static function create(
+		array $resourcePackEntries,
+		array $behaviorPackEntries,
+		bool $mustAccept,
+		bool $hasAddons,
+		bool $hasScripts,
+		bool $forceServerPacks,
+		array $cdnUrls,
+	) : self{
 		$result = new self;
 		$result->resourcePackEntries = $resourcePackEntries;
+		$result->behaviorPackEntries = $behaviorPackEntries;
 		$result->mustAccept = $mustAccept;
 		$result->hasAddons = $hasAddons;
 		$result->hasScripts = $hasScripts;
+		$result->forceServerPacks = $forceServerPacks;
 		$result->cdnUrls = $cdnUrls;
 		return $result;
 	}
@@ -54,6 +69,13 @@ protected function decodePayload(PacketSerializer $in) : void{
 			$this->hasAddons = $in->getBool();
 		}
 		$this->hasScripts = $in->getBool();
+		if($in->getProtocolId() <= ProtocolInfo::PROTOCOL_1_21_20){
+			$this->forceServerPacks = $in->getBool();
+			$behaviorPackCount = $in->getLShort();
+			while($behaviorPackCount-- > 0){
+				$this->behaviorPackEntries[] = BehaviorPackInfoEntry::read($in);
+			}
+		}
 
 		$resourcePackCount = $in->getLShort();
 		while($resourcePackCount-- > 0){
@@ -76,6 +98,13 @@ protected function encodePayload(PacketSerializer $out) : void{
 			$out->putBool($this->hasAddons);
 		}
 		$out->putBool($this->hasScripts);
+		if($out->getProtocolId() <= ProtocolInfo::PROTOCOL_1_21_20){
+			$out->putBool($this->forceServerPacks);
+			$out->putLShort(count($this->behaviorPackEntries));
+			foreach($this->behaviorPackEntries as $entry){
+				$entry->write($out);
+			}
+		}
 		$out->putLShort(count($this->resourcePackEntries));
 		foreach($this->resourcePackEntries as $entry){
 			$entry->write($out);

src/TransferPacket.php

@@ -37,13 +37,17 @@ public static function create(string $address, int $port, bool $reloadWorld) : s
 	protected function decodePayload(PacketSerializer $in) : void{
 		$this->address = $in->getString();
 		$this->port = $in->getLShort();
-		$this->reloadWorld = $in->getBool();
+		if($in->getProtocolId() >= ProtocolInfo::PROTOCOL_1_21_30){
+			$this->reloadWorld = $in->getBool();
+		}
 	}
 
 	protected function encodePayload(PacketSerializer $out) : void{
 		$out->putString($this->address);
 		$out->putLShort($this->port);
-		$out->putBool($this->reloadWorld);
+		if($out->getProtocolId() >= ProtocolInfo::PROTOCOL_1_21_30){
+			$out->putBool($this->reloadWorld);
+		}
 	}
 
 	public function handle(PacketHandlerInterface $handler) : bool{

src/types/camera/CameraPreset.php

@@ -120,6 +120,9 @@ public static function fromNBT(CompoundTag $nbt) : self{
 			$nbt->getTag("rot_y") === null ? null : $nbt->getFloat("rot_y"),
 			null,
 			null,
+			null,
+			null,
+			null,
 			$nbt->getTag("audio_listener_type") === null ? null : match($nbt->getString("audio_listener_type")){
 				"camera" => self::AUDIO_LISTENER_TYPE_CAMERA,
 				"player" => self::AUDIO_LISTENER_TYPE_PLAYER,

src/types/entity/UpdateAttribute.php

@@ -14,6 +14,7 @@
 
 namespace pocketmine\network\mcpe\protocol\types\entity;
 
+use pocketmine\network\mcpe\protocol\ProtocolInfo;
 use pocketmine\network\mcpe\protocol\serializer\PacketSerializer;
 use function count;
 
@@ -55,8 +56,10 @@ public static function read(PacketSerializer $in) : self{
 		$min = $in->getLFloat();
 		$max = $in->getLFloat();
 		$current = $in->getLFloat();
-		$defaultMin = $in->getLFloat();
-		$defaultMax = $in->getLFloat();
+		if($in->getProtocolId() >= ProtocolInfo::PROTOCOL_1_21_30){
+			$defaultMin = $in->getLFloat();
+			$defaultMax = $in->getLFloat();
+		}
 		$default = $in->getLFloat();
 		$id = $in->getString();
 
@@ -65,15 +68,17 @@ public static function read(PacketSerializer $in) : self{
 			$modifiers[] = AttributeModifier::read($in);
 		}
 
-		return new self($id, $min, $max, $current, $defaultMin, $defaultMax, $default, $modifiers);
+		return new self($id, $min, $max, $current, $defaultMin ?? $min, $defaultMax ?? $max, $default, $modifiers);
 	}
 
 	public function write(PacketSerializer $out) : void{
 		$out->putLFloat($this->min);
 		$out->putLFloat($this->max);
 		$out->putLFloat($this->current);
-		$out->putLFloat($this->defaultMin);
-		$out->putLFloat($this->defaultMax);
+		if($out->getProtocolId() >= ProtocolInfo::PROTOCOL_1_21_30){
+			$out->putLFloat($this->defaultMin);
+			$out->putLFloat($this->defaultMax);
+		}
 		$out->putLFloat($this->default);
 		$out->putString($this->id);