include/blitz/common/NonCopyable.h

@@ -0,0 +1,25 @@
+#pragma once
+
+/**
+ * \file NonCopyable.h
+ * \brief File containing the blitz::NonCopyable class
+ */
+
+namespace blitz {
+
+/**
+ * \class NonCopyable
+ * \brief Class used to make a class non copyable
+ * \note Inherit from this class privately to make a class non copyable
+ */
+class NonCopyable {
+  public:
+	NonCopyable(const NonCopyable&) = delete;
+	NonCopyable& operator=(const NonCopyable&) = delete;
+
+  protected:
+	NonCopyable() {}
+	~NonCopyable() {}
+};
+
+}  // namespace blitz

include/blitz/common/Types.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <cstdint>
+
+namespace blitz {
+
+using EntityID = std::uint64_t;
+using PeerID = std::int32_t;
+using PlayerID = PeerID;
+
+}  // namespace blitz

include/blitz/protocol/ByteBuffer.h

@@ -0,0 +1,89 @@
+#pragma once
+
+#include <godot_cpp/variant/packed_byte_array.hpp>
+#include <godot_cpp/variant/string.hpp>
+#include <vector>
+
+namespace blitz {
+namespace protocol {
+
+class PlayerInfo;
+
+#define Operators(Type, GodotType)                                                                                                    \
+	ByteBuffer& operator>>(Type& a_Data) {                                                                                            \
+		a_Data = m_Buffer.decode_##GodotType(m_ReadOffset);                                                                           \
+		m_ReadOffset += sizeof(a_Data);                                                                                               \
+		return *this;                                                                                                                 \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	ByteBuffer& operator<<(Type a_Data) {                                                                                             \
+		m_Buffer.resize(m_Buffer.size() + sizeof(a_Data));                                                                            \
+		m_Buffer.encode_##GodotType(m_Buffer.size() - sizeof(a_Data), a_Data);                                                        \
+		return *this;                                                                                                                 \
+	}
+
+class ByteBuffer {
+  private:
+	godot::PackedByteArray m_Buffer;
+	std::size_t m_ReadOffset;
+
+  public:
+	ByteBuffer(godot::PackedByteArray&& a_Buffer) : m_Buffer(std::move(a_Buffer)), m_ReadOffset(0) {}
+	ByteBuffer() : m_ReadOffset(0) {
+		m_Buffer.resize(0);
+	}
+
+	const godot::PackedByteArray& GetByteArray() const {
+		return m_Buffer;
+	}
+
+	godot::PackedByteArray& GetByteArray() {
+		return m_Buffer;
+	}
+
+	// Integers
+	Operators(int8_t, s8);
+	Operators(uint8_t, u8);
+	Operators(int16_t, s16);
+	Operators(uint16_t, u16);
+	Operators(int32_t, s32);
+	Operators(uint32_t, u32);
+	Operators(int64_t, s64);
+	Operators(uint64_t, u64);
+
+	// Reals
+	Operators(float, float);
+	Operators(double, double);
+
+	ByteBuffer& operator<<(const godot::String& a_Data);
+	ByteBuffer& operator>>(godot::String& a_Data);
+
+	ByteBuffer& operator<<(const godot::Vector3& a_Data);
+	ByteBuffer& operator>>(godot::Vector3& a_Data);
+
+	template <typename T>
+	ByteBuffer& operator<<(const std::vector<T>& a_Data) {
+		*this << static_cast<std::uint32_t>(a_Data.size());
+		for (const T& data : a_Data) {
+			*this << data;
+		}
+		return *this;
+	}
+
+	template <typename T>
+	ByteBuffer& operator>>(std::vector<T>& a_Data) {
+		std::uint32_t arraySize;
+		*this >> arraySize;
+		a_Data.resize(arraySize);
+		for (std::uint32_t i = 0; i < arraySize; i++) {
+			*this >> a_Data[i];
+		}
+		return *this;
+	}
+
+	ByteBuffer& operator<<(const PlayerInfo& a_Data);
+	ByteBuffer& operator>>(PlayerInfo& a_Data);
+};
+
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/PacketData.h

@@ -0,0 +1,72 @@
+#pragma once
+
+#include <blitz/common/Types.h>
+#include <vector>
+#include <godot_cpp/variant/string.hpp>
+#include <godot_cpp/variant/vector3.hpp>
+
+namespace blitz {
+namespace protocol {
+
+struct PlayerInfo {
+	PlayerID m_PlayerId;
+	godot::String m_PlayerName;
+};
+
+namespace data {
+
+struct PlayerLogin {
+	godot::String m_PlayerName;
+};
+
+struct UpdateHealth {
+	float m_NewHealth;
+};
+
+struct LoggingSuccess {
+	PlayerID m_PlayerId;
+};
+
+struct PlayerDeath {};
+
+struct PlayerJoin {
+	PlayerInfo m_Player;
+};
+
+struct PlayerLeave {
+	PlayerID m_PlayerId;
+};
+
+struct PlayerStats {};
+
+struct PlayerList {
+	std::vector<PlayerInfo> m_Players;
+};
+
+struct ServerConfig {};
+
+struct ServerTps {};
+
+struct UpdateGameState {};
+
+struct KeepAlive {
+	std::uint64_t m_KeepAliveId;
+};
+
+struct Disconnect {};
+
+struct ChatMessage {
+	godot::String m_Text;
+};
+
+struct PlayerPositionAndRotation {
+	PlayerID m_Player;
+	godot::Vector3 m_Position;
+	godot::Vector3 m_Rotation;
+};
+
+struct PlayerShoot {};
+
+}  // namespace data
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/PacketDeclare.h

@@ -0,0 +1,49 @@
+#pragma once
+
+/**
+ * \file PacketDeclare.h
+ * \brief Holds the definitions of the packets (but not their content)
+ */
+
+namespace blitz {
+namespace protocol {
+
+/**
+ * \enum PacketSender
+ * \brief Indicate who should send a packet
+ */
+enum class PacketSender {
+	/** Sent by clients and server */
+	Both,
+	/** Sent by clients to the server */
+	Client,
+	/** Sent by server to the clients */
+	Server,
+};
+
+
+/**
+ * \def DeclareAllPacket
+ * \brief Avoids repetitive operations on packets
+ */
+#define DeclareAllPacket() \
+	DeclarePacket(ChatMessage, Reliable, Both) \
+	DeclarePacket(Disconnect, Reliable, Both) \
+	DeclarePacket(KeepAlive, Reliable, Both)  \
+	DeclarePacket(LoggingSuccess, Reliable, Server) \
+	DeclarePacket(PlayerDeath, Reliable, Server) \
+	DeclarePacket(PlayerJoin, Reliable, Server) \
+	DeclarePacket(PlayerLeave, Reliable, Server) \
+	DeclarePacket(PlayerList, Reliable, Server) \
+	DeclarePacket(PlayerLogin, Reliable, Client) \
+	DeclarePacket(PlayerPositionAndRotation, Reliable, Both) \
+	DeclarePacket(PlayerShoot, Reliable, Both) \
+	DeclarePacket(PlayerStats, Reliable, Server) \
+	DeclarePacket(ServerConfig, Reliable, Server) \
+	DeclarePacket(ServerTps, Reliable, Server) \
+	DeclarePacket(UpdateGameState, Reliable, Server) \
+	DeclarePacket(UpdateHealth, Reliable, Client)
+
+
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/PacketDispatcher.h

@@ -0,0 +1,58 @@
+#pragma once
+
+/**
+ * \file PacketDispatcher.h
+ * \brief File containing the blitz::protocol::PacketDispatcher class
+ */
+
+#include <blitz/common/NonCopyable.h>
+#include <blitz/protocol/Packets.h>
+
+#include <map>
+
+namespace blitz {
+namespace protocol {
+
+class PacketHandler;
+
+/**
+ * \class PacketDispatcher
+ * \brief Class used to dispatch packets
+ */
+class PacketDispatcher : private NonCopyable {
+  private:
+	std::map<PacketType, std::vector<PacketHandler*>> m_Handlers;
+
+  public:
+	/**
+	 * \brief Constructor
+	 */
+	PacketDispatcher() {}
+
+	/**
+	 * \brief Dispatch a packet
+	 * \param packet The packet to dispatch
+	 */
+	void Dispatch(const Packet& packet);
+
+	/**
+	 * \brief Register a packet handler
+	 * \param type The packet type
+	 * \param handler The packet handler
+	 */
+	void RegisterHandler(PacketType type, PacketHandler& handler);
+	/**
+	 * \brief Unregister a packet handler
+	 * \param type The packet type
+	 * \param handler The packet handler
+	 */
+	void UnregisterHandler(PacketType type, PacketHandler& handler);
+	/**
+	 * \brief Unregister a packet handler
+	 * \param handler The packet handler
+	 */
+	void UnregisterHandler(PacketHandler& handler);
+};
+
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/PacketFactory.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <blitz/protocol/Packets.h>
+#include <memory>
+
+namespace blitz {
+namespace protocol {
+namespace PacketFactory {
+
+template<typename PacketDerived, typename = typename std::enable_if<std::is_base_of<Packet, PacketDerived>::value>::type>
+std::unique_ptr<PacketDerived> CreatePacket() {
+    return std::make_unique<PacketDerived>();
+}
+
+const std::unique_ptr<Packet>& CreateReadOnlyPacket(PacketType a_Type);
+
+void Init();
+
+}  // namespace PacketFactory
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/PacketHandler.h

@@ -0,0 +1,34 @@
+#pragma once
+
+/**
+ * \file PacketHandler.h
+ * \brief File containing the blitz::protocol::PacketHandler class
+ */
+
+#include <blitz/protocol/Packets.h>
+#include <blitz/protocol/PacketVisitor.h>
+
+namespace blitz {
+namespace protocol {
+
+class PacketDispatcher;
+
+#define DeclarePacket(PacketName, ...) virtual void Visit(const packets::PacketName&); virtual void HandlePacket(const packets::PacketName&) {}
+
+/**
+ * \class PacketHandler
+ * \brief Class used to handle packets
+ */
+class PacketHandler : public PacketVisitor {
+  public:
+	PacketHandler() {}
+	~PacketHandler() {}
+
+	DeclareAllPacket()
+
+};
+
+#undef DeclarePacket
+
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/PacketSerializer.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <blitz/protocol/Packets.h>
+#include <godot_cpp/variant/packed_byte_array.hpp>
+#include <memory>
+
+namespace blitz {
+namespace protocol {
+
+using PacketPtr = std::unique_ptr<Packet>;
+
+namespace PacketSerializer {
+
+godot::PackedByteArray Serialize(const Packet& a_Packet);
+
+std::unique_ptr<Packet> Deserialize(godot::PackedByteArray& a_Data);
+
+}
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/PacketVisitor.h

@@ -0,0 +1,39 @@
+#pragma once
+
+/**
+ * \file PacketVisitor.h
+ * \brief File containing the blitz::protocol::PacketVisitor class
+ */
+
+#include <blitz/protocol/Packets.h>
+
+namespace blitz {
+namespace protocol {
+
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	/** This function is called when the packet processed by PacketVisitor::Check is a PacketName */                                                                                                                            \
+	virtual void Visit(const packets::PacketName&) {}
+
+/**
+ * \class PacketVisitor
+ * \brief This class uses double-dispatch in order to find the real type of a packet
+ */
+class PacketVisitor : private NonCopyable {
+  protected:
+	PacketVisitor() {}
+	virtual ~PacketVisitor() {}
+
+  public:
+	/**
+	 * \brief Calls the right PacketVisitor::Visit method corresponding to the real type of the packet
+	 * \param packet the Packet to visit
+	 */
+	void Check(const Packet& packet);
+
+	DeclareAllPacket()
+};
+
+#undef DeclarePacket
+
+}  // namespace protocol
+}  // namespace blitz

include/blitz/protocol/Packets.h

@@ -0,0 +1,112 @@
+#pragma once
+
+/**
+ * \file Packets.h
+ * \brief File containing the definitions of the packets
+ */
+
+#include <blitz/common/NonCopyable.h>
+#include <blitz/protocol/PacketData.h>
+#include <blitz/protocol/PacketDeclare.h>
+
+namespace blitz {
+namespace protocol {
+
+class PacketVisitor;
+
+/** A Packet id is 8 bits wide */
+using PacketID = std::uint8_t;
+
+#define DeclarePacket(PacketName, ...) /** PacketName */ PacketName,
+
+/**
+ * \enum PacketType
+ * \brief Map a Packet to an id
+ */
+enum class PacketType : PacketID {
+
+	DeclareAllPacket()
+
+	/** The number of packets */
+	PACKET_COUNT
+};
+
+
+#undef DeclarePacket
+
+
+class Packet : private NonCopyable {
+  public:
+	/**
+	 * \return The real type of the packet
+	 */
+	virtual PacketType GetType() const = 0;
+
+	/**
+	 * \brief The network peer who sent the packet
+	 */
+	PeerID m_Sender;
+
+  private:
+	/** Use a PacketVisitor to make double-dispatch possible */
+	virtual void Accept(PacketVisitor& a_Visitor) const = 0;
+
+	friend class PacketVisitor;
+};
+
+
+
+
+
+namespace packets {
+
+/**
+ * \class ConcretePacket
+ * \brief A Packet associated with an id and holding data
+ * \tparam PT The packet type
+ * \tparam Data The structure holding the data of the packet (in blitz::protocol::data namespace)
+ */
+template <PacketType PT, typename Data>
+class ConcretePacket : public Packet {
+  public:
+	/** The type of the struct holding the data */
+	using PacketDataType = Data;
+
+	/** The structure holding the actual data */
+	PacketDataType m_Data;
+
+	/** Construct the packet with data of type PacketDataType */
+	ConcretePacket(const PacketDataType& a_Data = {});
+
+	constexpr PacketType GetType() const override {
+		return PT;
+	};
+
+  private:
+	void Accept(PacketVisitor& a_Visitor) const override;
+};
+
+
+
+
+
+// define BLITZ_INSTANCIATE_PACKETS
+// before including this file
+// if you want to instantiate templates
+#ifdef BLITZ_INSTANCIATE_PACKETS
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	using PacketName = ConcretePacket<PacketType::PacketName, data::PacketName>;                                                      \
+	template class ConcretePacket<PacketType::PacketName, data::PacketName>;
+#else
+#define DeclarePacket(PacketName, ...) /** Defines the PacketName packet */                                                           \
+	using PacketName = ConcretePacket<PacketType::PacketName, data::PacketName>;
+#endif
+
+DeclareAllPacket()
+
+#undef DeclarePacket
+
+}  // namespace packets
+
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/ByteBuffer.cpp

@@ -0,0 +1,49 @@
+#include <blitz/protocol/ByteBuffer.h>
+
+#include <blitz/protocol/PacketData.h>
+
+namespace blitz {
+namespace protocol {
+
+ByteBuffer& ByteBuffer::operator>>(PlayerInfo& a_Data) {
+	*this >> a_Data.m_PlayerId >> a_Data.m_PlayerName;
+	return *this;
+}
+
+ByteBuffer& ByteBuffer::operator<<(const PlayerInfo& a_Data) {
+	*this << a_Data.m_PlayerId << a_Data.m_PlayerName;
+	return *this;
+}
+
+ByteBuffer& ByteBuffer::operator<<(const godot::Vector3& a_Data) {
+	*this << a_Data.x << a_Data.y << a_Data.z;
+	return *this;
+}
+
+ByteBuffer& ByteBuffer::operator>>(godot::Vector3& a_Data) {
+	*this >> a_Data.x >> a_Data.y >> a_Data.z;
+	return *this;
+}
+
+ByteBuffer& ByteBuffer::operator>>(godot::String& a_Data) {
+	int nullPos = m_Buffer.find(0, m_ReadOffset);
+	// TODO: error handling
+	if (nullPos < 0)
+		return *this;
+
+	godot::PackedByteArray stringBuffer = m_Buffer.slice(m_ReadOffset, nullPos);
+	a_Data = stringBuffer.get_string_from_utf8();
+	m_ReadOffset = nullPos + 1;
+	return *this;
+}
+
+ByteBuffer& ByteBuffer::operator<<(const godot::String& a_Data) {
+	godot::PackedByteArray stringBuffer = a_Data.to_utf8_buffer();
+	m_Buffer.append_array(stringBuffer);
+	// ends the string
+	*this << static_cast<std::uint8_t>(0);
+	return *this;
+}
+
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/PacketDispatcher.cpp

@@ -0,0 +1,37 @@
+#include <blitz/protocol/PacketDispatcher.h>
+
+#include <algorithm>
+#include <blitz/protocol/PacketHandler.h>
+
+namespace blitz {
+namespace protocol {
+
+void PacketDispatcher::RegisterHandler(PacketType type, PacketHandler& handler) {
+	auto found = std::find(m_Handlers[type].begin(), m_Handlers[type].end(), &handler);
+	if (found == m_Handlers[type].end())
+		m_Handlers[type].push_back(&handler);
+}
+
+void PacketDispatcher::UnregisterHandler(PacketType type, PacketHandler& handler) {
+	m_Handlers[type].erase(std::remove(m_Handlers[type].begin(), m_Handlers[type].end(), &handler), m_Handlers[type].end());
+}
+
+void PacketDispatcher::UnregisterHandler(PacketHandler& handler) {
+	for (auto& pair : m_Handlers) {
+		if (pair.second.empty())
+			continue;
+
+		PacketType type = pair.first;
+
+		m_Handlers[type].erase(std::remove(m_Handlers[type].begin(), m_Handlers[type].end(), &handler), m_Handlers[type].end());
+	}
+}
+
+void PacketDispatcher::Dispatch(const Packet& packet) {
+	PacketType type = packet.GetType();
+	for (PacketHandler* handler : m_Handlers[type])
+		handler->Check(packet);
+}
+
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/PacketFactory.cpp

@@ -0,0 +1,32 @@
+#include <blitz/protocol/PacketFactory.h>
+
+#include <array>
+#include <cassert>
+#include <functional>
+
+namespace blitz {
+namespace protocol {
+namespace PacketFactory {
+
+using PacketCreator = std::function<std::unique_ptr<Packet>()>;
+
+#define DeclarePacket(PacketName, ...) std::make_unique<packets::PacketName>(),
+
+static std::array<std::unique_ptr<Packet>, static_cast<std::size_t>(PacketType::PACKET_COUNT)> Packets;
+
+void Init() {
+	Packets = {
+
+		DeclareAllPacket()
+
+	};
+}
+
+const std::unique_ptr<Packet>& CreateReadOnlyPacket(PacketType a_Type) {
+	assert(a_Type < PacketType::PACKET_COUNT);
+	return Packets[static_cast<std::size_t>(a_Type)];
+}
+
+}  // namespace PacketFactory
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/PacketHandler.cpp

@@ -0,0 +1,14 @@
+#include <blitz/protocol/PacketHandler.h>
+
+namespace blitz {
+namespace protocol {
+
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	void PacketHandler::Visit(const packets::PacketName& a_Packet) {                                                                  \
+		HandlePacket(a_Packet);                                                                                                       \
+	}
+
+DeclareAllPacket()
+
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/PacketSerializer.cpp

@@ -0,0 +1,294 @@
+#include <blitz/protocol/PacketSerializer.h>
+
+#include <blitz/protocol/ByteBuffer.h>
+#include <blitz/protocol/PacketFactory.h>
+#include <blitz/protocol/PacketVisitor.h>
+
+#include <godot_cpp/variant/utility_functions.hpp>
+#include <godot_cpp/variant/variant.hpp>
+
+namespace blitz {
+namespace protocol {
+namespace PacketSerializer {
+
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	void Visit(const packets::PacketName& a_Packet) override {                                                                        \
+		const auto& packetData = a_Packet.m_Data;                                                                                     \
+		SerializePacketData(packetData);                                                                                              \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	void SerializePacketData(const packets::PacketName::PacketDataType& a_Packet);
+
+
+
+
+class Serializer : public PacketVisitor {
+  private:
+	ByteBuffer& m_Buffer;
+
+  public:
+	Serializer(ByteBuffer& a_Buffer) : m_Buffer(a_Buffer) {}
+
+	void Serialize(const Packet& a_Packet) {
+		m_Buffer << static_cast<PacketID>(a_Packet.GetType());
+		Check(a_Packet);
+	}
+
+	DeclareAllPacket()
+};
+
+#undef DeclarePacket
+
+
+
+
+
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	void Visit(const packets::PacketName& a_Packet) override {                                                                        \
+		auto packetPtr = PacketFactory::CreatePacket<packets::PacketName>();                                                          \
+		auto& packetData = packetPtr->m_Data;                                                                                         \
+                                                                                                                                      \
+		DeserializePacketData(packetData);                                                                                            \
+                                                                                                                                      \
+		m_Packet = std::move(packetPtr);                                                                                              \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	void DeserializePacketData(packets::PacketName::PacketDataType& a_Packet);
+
+
+
+class Deserializer : public PacketVisitor {
+  private:
+	ByteBuffer& m_Buffer;
+	PacketPtr m_Packet;
+
+  public:
+	Deserializer(ByteBuffer&& a_Buffer) : m_Buffer(a_Buffer) {}
+
+	bool Deserialize(const PacketPtr& a_Packet) {
+		try {
+			Check(*a_Packet.get());
+		} catch (std::exception& e) {
+			return false;
+		}
+		return true;
+	}
+
+	PacketPtr& GetPacket() {
+		return m_Packet;
+	}
+
+	DeclareAllPacket()
+};
+
+
+
+
+
+godot::PackedByteArray Serialize(const Packet& a_Packet) {
+	ByteBuffer stream;
+
+	Serializer serializer(stream);
+	serializer.Serialize(a_Packet);
+
+	return stream.GetByteArray();
+}
+
+std::unique_ptr<Packet> Deserialize(godot::PackedByteArray& a_Data) {
+	ByteBuffer stream(std::move(a_Data));
+
+	PacketID packetId;
+	stream >> packetId;
+
+	if (packetId >= static_cast<PacketID>(PacketType::PACKET_COUNT))
+		return nullptr;
+
+	PacketType packetType = PacketType(packetId);
+
+	// for double-dispatch
+	const PacketPtr& emptyPacket = PacketFactory::CreateReadOnlyPacket(packetType);
+
+	Deserializer deserializer(std::move(stream));
+	if (deserializer.Deserialize(emptyPacket)) {
+		PacketPtr packet = std::move(deserializer.GetPacket());
+		return packet;
+	}
+
+	return nullptr;
+}
+
+
+
+
+
+//---------------------------------------------
+// Packet serializer implementation
+//----------------------------------------------
+
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerLogin& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerName;
+}
+
+void Deserializer::DeserializePacketData(data::PlayerLogin& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerName;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::UpdateHealth& a_Packet) {
+	m_Buffer << a_Packet.m_NewHealth;
+}
+
+void Deserializer::DeserializePacketData(data::UpdateHealth& a_Packet) {
+	m_Buffer >> a_Packet.m_NewHealth;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::LoggingSuccess& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerId;
+}
+
+void Deserializer::DeserializePacketData(data::LoggingSuccess& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerId;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerDeath& a_Packet) {}
+
+void Deserializer::DeserializePacketData(data::PlayerDeath& a_Packet) {}
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerJoin& a_Packet) {
+	m_Buffer << a_Packet.m_Player;
+}
+
+void Deserializer::DeserializePacketData(data::PlayerJoin& a_Packet) {
+	m_Buffer >> a_Packet.m_Player;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerLeave& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerId;
+}
+
+void Deserializer::DeserializePacketData(data::PlayerLeave& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerId;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerList& a_Packet) {
+	m_Buffer << a_Packet.m_Players;
+	// m_Buffer << static_cast<std::uint8_t>(a_Packet.m_Players.size());
+	// for (auto player : a_Packet.m_Players) {
+	// 	m_Buffer << player.m_PlayerId << player.m_PlayerName;
+	// }
+}
+
+void Deserializer::DeserializePacketData(data::PlayerList& a_Packet) {
+	m_Buffer >> a_Packet.m_Players;
+	// std::uint8_t playerCount;
+	// m_Buffer >> playerCount;
+	// for (std::uint8_t i = 0; i < playerCount; i++) {
+	// 	PlayerInfo player;
+	// 	m_Buffer >> player.m_PlayerId >> player.m_PlayerName;
+	// 	a_Packet.m_Players.push_back(player);
+	// }
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerStats& a_Packet) {}
+
+void Deserializer::DeserializePacketData(data::PlayerStats& a_Packet) {}
+
+
+
+
+void Serializer::SerializePacketData(const data::ServerConfig& a_Packet) {}
+
+void Deserializer::DeserializePacketData(data::ServerConfig& a_Packet) {}
+
+
+
+
+void Serializer::SerializePacketData(const data::ServerTps& a_Packet) {}
+
+void Deserializer::DeserializePacketData(data::ServerTps& a_Packet) {}
+
+
+
+
+void Serializer::SerializePacketData(const data::UpdateGameState& a_Packet) {}
+
+void Deserializer::DeserializePacketData(data::UpdateGameState& a_Packet) {}
+
+
+
+
+void Serializer::SerializePacketData(const data::KeepAlive& a_Packet) {
+	m_Buffer << a_Packet.m_KeepAliveId;
+}
+
+void Deserializer::DeserializePacketData(data::KeepAlive& a_Packet) {
+	m_Buffer >> a_Packet.m_KeepAliveId;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::Disconnect& a_Packet) {}
+
+void Deserializer::DeserializePacketData(data::Disconnect& a_Packet) {}
+
+
+
+
+void Serializer::SerializePacketData(const data::ChatMessage& a_Packet) {
+	m_Buffer << a_Packet.m_Text;
+}
+
+void Deserializer::DeserializePacketData(data::ChatMessage& a_Packet) {
+	m_Buffer >> a_Packet.m_Text;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerPositionAndRotation& a_Packet) {
+	m_Buffer << a_Packet.m_Player << a_Packet.m_Position << a_Packet.m_Rotation;
+}
+
+void Deserializer::DeserializePacketData(data::PlayerPositionAndRotation& a_Packet) {
+	m_Buffer >> a_Packet.m_Player >> a_Packet.m_Position >> a_Packet.m_Rotation;
+}
+
+
+
+
+void Serializer::SerializePacketData(const data::PlayerShoot& a_Packet) {}
+
+void Deserializer::DeserializePacketData(data::PlayerShoot& a_Packet) {}
+
+
+
+
+
+}  // namespace PacketSerializer
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/PacketVisitor.cpp

@@ -0,0 +1,11 @@
+#include <blitz/protocol/PacketVisitor.h>
+
+namespace blitz {
+namespace protocol {
+
+void PacketVisitor::Check(const Packet& a_Packet) {
+	a_Packet.Accept(*this);
+}
+
+}  // namespace protocol
+}  // namespace blitz

src/blitz/protocol/Packets.cpp

@@ -0,0 +1,18 @@
+#define BLITZ_INSTANCIATE_PACKETS
+#include <blitz/protocol/Packets.h>
+
+#include <blitz/protocol/PacketVisitor.h>
+
+namespace blitz {
+namespace protocol {
+
+template <PacketType PT, typename Data>
+packets::ConcretePacket<PT, Data>::ConcretePacket(const PacketDataType& a_Data) : m_Data(a_Data) {}
+
+template <PacketType PT, typename Data>
+void packets::ConcretePacket<PT, Data>::Accept(PacketVisitor& a_Visitor) const {
+	a_Visitor.Visit(*this);
+}
+
+}  // namespace protocol
+}  // namespace blitz

xmake/target.lua

@@ -14,6 +14,8 @@ target(PROJECT_NAME)
     -- more on https://xmake.io/#/manual/project_target?id=targetadd_files
     add_files("../src/**.cpp")
 
+    add_includedirs("../include")
+
     -- change the output name
     set_basename(PROJECT_NAME .. ".$(os)_$(mode)_$(arch)")