begin packet serialization

include/blitz/protocol/Packets.h

@@ -0,0 +1,121 @@
+#pragma once
+
+#include <string>
+#include <blitz/protocol/PacketData.h>
+
+namespace blitz {
+namespace protocol {
+
+class PacketVisitor;
+
+using PacketID = std::uint8_t;
+
+enum class PacketType : PacketID {
+	// client --> server
+
+	PlayerLogin = 0,
+	UpdateHealth,
+
+	// client <-- server
+
+	LoggingSuccess,
+	PlayerDeath,
+	PlayerJoin,
+	PlayerLeave,
+	PlayerList,
+	PlayerStats,
+	ServerConfig,
+	ServerTps,
+	UpdateGameState,
+
+	// client <--> server
+
+	KeepAlive,
+	Disconnect,
+	ChatMessage,
+	PlayerPositionAndRotation,
+	PlayerShoot,
+
+	PACKET_COUNT
+};
+
+
+
+
+
+class Packet {
+  public:
+	virtual PacketType GetType() const = 0;
+
+	virtual void Accept(PacketVisitor& a_Visitor) const = 0;
+};
+
+
+
+
+
+namespace packets {
+
+/**
+ * \tparam PT The packet type
+ * \tparam Data The structure holding the data of the packet
+ */
+template <PacketType PT, typename Data>
+class ConcretePacket : public Packet {
+  public:
+	using PacketDataType = Data;
+	
+	PacketDataType m_Data;
+
+	ConcretePacket(const PacketDataType& a_Data = {});
+
+	constexpr PacketType GetType() const override {
+		return PT;
+	};
+
+  private:
+	void Accept(PacketVisitor& a_Visitor) const override;
+
+	friend class PacketVisitor;
+};
+
+
+
+
+
+// define BLITZ_INSTANCIATE_PACKETS
+// before including this file
+// if you want to instantiate templates
+#ifdef BLITZ_INSTANCIATE_PACKETS
+#define DeclarePacket(Type)                                                                                                 \
+	using Type = ConcretePacket<PacketType::Type, data::Type>;                                                                          \
+	template class ConcretePacket<PacketType::Type, data::Type>
+#else
+#define DeclarePacket(Type) using Type = ConcretePacket<PacketType::Type, data::Type>
+#endif
+
+
+
+
+
+DeclarePacket(PlayerLogin);
+DeclarePacket(UpdateHealth);
+DeclarePacket(LoggingSuccess);
+DeclarePacket(PlayerDeath);
+DeclarePacket(PlayerJoin);
+DeclarePacket(PlayerLeave);
+DeclarePacket(PlayerStats);
+DeclarePacket(PlayerList);
+DeclarePacket(ServerConfig);
+DeclarePacket(ServerTps);
+DeclarePacket(UpdateGameState);
+DeclarePacket(KeepAlive);
+DeclarePacket(Disconnect);
+DeclarePacket(ChatMessage);
+DeclarePacket(PlayerPositionAndRotation);
+DeclarePacket(PlayerShoot);
+
+}  // namespace packets
+
+}  // namespace protocol
+}  // namespace blitz