implement server and client player join/leave notifications

include/blitz/common/Types.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <cstdint>
+
+namespace blitz {
+
+using EntityID = std::uint32_t;
+
+}  // namespace blitz

include/blitz/components/PlayerInfo.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <blitz/common/Types.h>
+#include <string>
+
+namespace blitz {
+
+struct PlayerInfoComponent {
+	EntityID m_PlayerId;
+	std::string m_Pseudo;
+};
+
+}  // namespace blitz

include/blitz/protocol/PacketData.h

@@ -1,6 +1,7 @@
 #pragma once
 
-#include <string>
+#include <blitz/components/PlayerInfo.h>
+#include <vector>
 
 namespace blitz {
 namespace protocol {
@@ -14,17 +15,25 @@ struct UpdateHealth {
 	float m_NewHealth;
 };
 
-struct LoggingSuccess {};
+struct LoggingSuccess {
+	EntityID m_PlayerId;
+};
 
 struct PlayerDeath {};
 
-struct PlayerJoin {};
+struct PlayerJoin {
+	PlayerInfoComponent m_Player;
+};
 
-struct PlayerLeave {};
+struct PlayerLeave {
+	EntityID m_PlayerId;
+};
 
 struct PlayerStats {};
 
-struct PlayerList {};
+struct PlayerList {
+	std::vector<PlayerInfoComponent> m_Players;
+};
 
 struct ServerConfig {};
 

include/client/Client.h

@@ -10,7 +10,7 @@ namespace client {
 
 class Client : private NonCopyable {
   public:
-	Client();
+	Client(std::shared_ptr<Nz::EnttWorld> a_World);
 	~Client();
 
 	void Connect(const Nz::IpAddress& a_Ip);
@@ -25,6 +25,7 @@ class Client : private NonCopyable {
 
 	void BindHandlers();
 	void UnbindHandlers();
+	void Login();
 };
 
 }  // namespace client

include/client/components/LocalPlayer.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <blitz/common/Types.h>
+
+namespace blitz {
+namespace client {
+
+struct LocalPlayerComponent {
+	EntityID m_LocalPlayerId;
+};
+
+}  // namespace client
+}  // namespace blitz

include/client/handlers/KeepAliveHandler.h

@@ -9,6 +9,9 @@ class KeepAliveHandler : public protocol::PacketHandler {
 	~KeepAliveHandler();
 
 	NazaraSlot(network::EnetConnection, OnKeepAlive, m_Slot);
+
+  private:
+	void Handle(const protocol::data::KeepAlive&);
 };
 
 }  // namespace client

include/client/handlers/LoggingSuccessHandler.h

@@ -0,0 +1,18 @@
+#include <blitz/protocol/PacketHandler.h>
+
+namespace blitz {
+namespace client {
+
+class LoggingSuccessHandler : public protocol::PacketHandler {
+  public:
+	LoggingSuccessHandler(network::EnetConnection& a_Connection, EnttWorld& a_World);
+	~LoggingSuccessHandler();
+
+	NazaraSlot(network::EnetConnection, OnLoggingSuccess, m_Slot);
+
+  private:
+	void Handle(const protocol::data::LoggingSuccess&);
+};
+
+}  // namespace client
+}  // namespace blitz

include/client/handlers/PlayerJoinHandler.h

@@ -0,0 +1,18 @@
+#include <blitz/protocol/PacketHandler.h>
+
+namespace blitz {
+namespace client {
+
+class PlayerJoinHandler : public protocol::PacketHandler {
+  public:
+	PlayerJoinHandler(network::EnetConnection& a_Connection, EnttWorld& a_World);
+	~PlayerJoinHandler();
+
+	NazaraSlot(network::EnetConnection, OnPlayerJoin, m_Slot);
+
+  private:
+	void Handle(const protocol::data::PlayerJoin&);
+};
+
+}  // namespace client
+}  // namespace blitz

include/client/handlers/PlayerLeaveHandler.h

@@ -0,0 +1,18 @@
+#include <blitz/protocol/PacketHandler.h>
+
+namespace blitz {
+namespace client {
+
+class PlayerLeaveHandler : public protocol::PacketHandler {
+  public:
+	PlayerLeaveHandler(network::EnetConnection& a_Connection, EnttWorld& a_World);
+	~PlayerLeaveHandler();
+
+	NazaraSlot(network::EnetConnection, OnPlayerLeave, m_Slot);
+
+  private:
+	void Handle(const protocol::data::PlayerLeave&);
+};
+
+}  // namespace client
+}  // namespace blitz

include/client/handlers/PlayerListHandler.h

@@ -0,0 +1,18 @@
+#include <blitz/protocol/PacketHandler.h>
+
+namespace blitz {
+namespace client {
+
+class PlayerListHandler : public protocol::PacketHandler {
+  public:
+	PlayerListHandler(network::EnetConnection& a_Connection, EnttWorld& a_World);
+	~PlayerListHandler();
+
+	NazaraSlot(network::EnetConnection, OnPlayerList, m_Slot);
+
+  private:
+	void Handle(const protocol::data::PlayerList&);
+};
+
+}  // namespace client
+}  // namespace blitz

include/server/Server.h

@@ -8,6 +8,10 @@ namespace server {
 
 class Server {
   public:
+	/**
+	 * \brief Construct a server
+	 * \pre Two instances of Server should not share the same world
+	 */
 	Server(std::uint16_t a_Port, std::shared_ptr<Nz::EnttWorld> a_World);
 	~Server();
 

include/server/components/ServerIdCounter.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <blitz/common/Types.h>
+
+namespace blitz {
+namespace server {
+
+struct ServerIdCounterComponent {
+	EntityID m_NextEntityId;
+};
+
+}  // namespace server
+}  // namespace blitz

include/server/handlers/PlayerLoginHandler.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <blitz/protocol/PacketHandler.h>
+
+namespace blitz {
+namespace server {
+
+class PlayerLoginHandler : public protocol::PacketHandler {
+  public:
+	PlayerLoginHandler(network::EnetConnection& a_Connection, EnttWorld& a_World);
+	~PlayerLoginHandler();
+
+	NazaraSlot(network::EnetConnection, OnPlayerLogin, m_Slot);
+
+  private:
+	void Handle(std::uint16_t, const protocol::data::PlayerLogin&);
+};
+
+}  // namespace server
+}  // namespace blitz

src/blitz/protocol/PacketSerializer.cpp

@@ -152,10 +152,13 @@ void Deserializer::DeserializePacketData(data::UpdateHealth& a_Packet) {
 
 
 
+void Serializer::SerializePacketData(const data::LoggingSuccess& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerId;
+}
 
-void Serializer::SerializePacketData(const data::LoggingSuccess& a_Packet) {}
-
-void Deserializer::DeserializePacketData(data::LoggingSuccess& a_Packet) {}
+void Deserializer::DeserializePacketData(data::LoggingSuccess& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerId;
+}
 
 
 
@@ -167,23 +170,44 @@ void Deserializer::DeserializePacketData(data::PlayerDeath& a_Packet) {}
 
 
 
-void Serializer::SerializePacketData(const data::PlayerJoin& a_Packet) {}
+void Serializer::SerializePacketData(const data::PlayerJoin& a_Packet) {
+	m_Buffer << a_Packet.m_Player.m_PlayerId << a_Packet.m_Player.m_Pseudo;
+}
 
-void Deserializer::DeserializePacketData(data::PlayerJoin& a_Packet) {}
+void Deserializer::DeserializePacketData(data::PlayerJoin& a_Packet) {
+	m_Buffer >> a_Packet.m_Player.m_PlayerId >> a_Packet.m_Player.m_Pseudo;
+}
 
 
 
 
-void Serializer::SerializePacketData(const data::PlayerLeave& a_Packet) {}
+void Serializer::SerializePacketData(const data::PlayerLeave& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerId;
+}
 
-void Deserializer::DeserializePacketData(data::PlayerLeave& a_Packet) {}
+void Deserializer::DeserializePacketData(data::PlayerLeave& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerId;
+}
 
 
 
 
-void Serializer::SerializePacketData(const data::PlayerList& a_Packet) {}
+void Serializer::SerializePacketData(const data::PlayerList& a_Packet) {
+	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_Pseudo;
+	}
+}
 
-void Deserializer::DeserializePacketData(data::PlayerList& a_Packet) {}
+void Deserializer::DeserializePacketData(data::PlayerList& a_Packet) {
+	std::uint8_t playerCount;
+	m_Buffer >> playerCount;
+	for (std::uint8_t i = 0; i < playerCount; i++) {
+		PlayerInfoComponent player;
+		m_Buffer >> player.m_PlayerId >> player.m_Pseudo;
+		a_Packet.m_Players.push_back(player);
+	}
+}
 
 
 

src/client/Client.cpp

@@ -1,12 +1,18 @@
 #include <client/Client.h>
 
 #include <client/handlers/KeepAliveHandler.h>
+#include <client/handlers/LoggingSuccessHandler.h>
+#include <client/handlers/PlayerJoinHandler.h>
+#include <client/handlers/PlayerLeaveHandler.h>
+#include <client/handlers/PlayerListHandler.h>
+
+#define RegisterHandler(Handler) m_Handlers.push_back(std::make_unique<Handler>(m_NetworkClient->GetConnection(), m_World))
 
 namespace blitz {
 namespace client {
 
-Client::Client() : m_World() {
-	m_World.store(std::make_shared<Nz::EnttWorld>());
+Client::Client(std::shared_ptr<Nz::EnttWorld> a_World) {
+	m_World.store(a_World);
 }
 
 Client::~Client() {
@@ -14,7 +20,11 @@ Client::~Client() {
 }
 
 void Client::BindHandlers() {
-	m_Handlers.push_back(std::make_unique<KeepAliveHandler>(m_NetworkClient->GetConnection(), m_World));
+	RegisterHandler(KeepAliveHandler);
+	RegisterHandler(LoggingSuccessHandler);
+	RegisterHandler(PlayerJoinHandler);
+	RegisterHandler(PlayerLeaveHandler);
+	RegisterHandler(PlayerListHandler);
 }
 
 void Client::UnbindHandlers() {
@@ -24,6 +34,7 @@ void Client::UnbindHandlers() {
 void Client::Connect(const Nz::IpAddress& a_Ip) {
 	m_NetworkClient = std::make_unique<network::EnetClient>(a_Ip);
 	BindHandlers();
+	m_NetworkClient->OnConnect.Connect([this]() { Login(); });
 }
 
 void Client::Disconnect() {
@@ -41,5 +52,11 @@ bool Client::IsConnected() {
 	return m_NetworkClient->GetConnection().IsConnected();
 }
 
+void Client::Login() {
+	if (!m_NetworkClient || !m_NetworkClient->GetConnection().IsConnected())
+		return;
+	m_NetworkClient->GetConnection().SendPlayerLogin({"Player_" + std::to_string(rand() % 100)});
+}
+
 }  // namespace client
 }  // namespace blitz

src/client/handlers/KeepAliveHandler.cpp

@@ -5,8 +5,11 @@ namespace client {
 
 KeepAliveHandler::KeepAliveHandler(network::EnetConnection& a_Connection, EnttWorld& a_World) :
 	protocol::PacketHandler(a_Connection, a_World) {
-	m_Slot.Connect(m_Connection.OnKeepAlive,
-		[this](const blitz::protocol::data::KeepAlive& a_KeepAlive) { m_Connection.SendKeepAlive(a_KeepAlive); });
+	m_Slot.Connect(m_Connection.OnKeepAlive, this, &KeepAliveHandler::Handle);
+}
+
+void KeepAliveHandler::Handle(const blitz::protocol::data::KeepAlive& a_KeepAlive) {
+	m_Connection.SendKeepAlive(a_KeepAlive);
 }
 
 KeepAliveHandler::~KeepAliveHandler() {}

src/client/handlers/LoggingSuccessHandler.cpp

@@ -0,0 +1,22 @@
+#include <client/handlers/LoggingSuccessHandler.h>
+
+#include <client/components/LocalPlayer.h>
+
+namespace blitz {
+namespace client {
+
+LoggingSuccessHandler::LoggingSuccessHandler(network::EnetConnection& a_Connection, EnttWorld& a_World) :
+	protocol::PacketHandler(a_Connection, a_World) {
+	m_Slot.Connect(m_Connection.OnLoggingSuccess, this, &LoggingSuccessHandler::Handle);
+}
+
+void LoggingSuccessHandler::Handle(const blitz::protocol::data::LoggingSuccess& a_LoggingSuccess) {
+	auto world = m_World.load();
+	auto player = world->CreateEntity();
+	player.emplace<LocalPlayerComponent>(a_LoggingSuccess.m_PlayerId);
+}
+
+LoggingSuccessHandler::~LoggingSuccessHandler() {}
+
+}  // namespace client
+}  // namespace blitz

src/client/handlers/PlayerJoinHandler.cpp

@@ -0,0 +1,35 @@
+#include <client/handlers/PlayerJoinHandler.h>
+
+#include <client/components/LocalPlayer.h>
+
+namespace blitz {
+namespace client {
+
+PlayerJoinHandler::PlayerJoinHandler(network::EnetConnection& a_Connection, EnttWorld& a_World) :
+	protocol::PacketHandler(a_Connection, a_World) {
+	m_Slot.Connect(m_Connection.OnPlayerJoin, this, &PlayerJoinHandler::Handle);
+}
+
+void PlayerJoinHandler::Handle(const protocol::data::PlayerJoin& a_PlayerJoin) {
+	auto world = m_World.load();
+	assert(world->GetRegistry().view<LocalPlayerComponent>().size() == 1 && "There should be only one local player !");
+
+	auto localPlayer = world->GetRegistry().view<LocalPlayerComponent>().front();
+	auto localPlayerId = world->GetRegistry().get<LocalPlayerComponent>(localPlayer).m_LocalPlayerId;
+
+	if (a_PlayerJoin.m_Player.m_PlayerId != localPlayerId) {
+		auto newPlayer = world->CreateEntity();
+
+		newPlayer.emplace<PlayerInfoComponent>(a_PlayerJoin.m_Player);
+		return;
+	}
+
+	world->GetRegistry().emplace<PlayerInfoComponent>(localPlayer, a_PlayerJoin.m_Player);
+
+	// we are now into the game so we can begin to load the world for example
+}
+
+PlayerJoinHandler::~PlayerJoinHandler() {}
+
+}  // namespace client
+}  // namespace blitz

src/client/handlers/PlayerLeaveHandler.cpp

@@ -0,0 +1,29 @@
+#include <client/handlers/PlayerLeaveHandler.h>
+
+namespace blitz {
+namespace client {
+
+PlayerLeaveHandler::PlayerLeaveHandler(network::EnetConnection& a_Connection, EnttWorld& a_World) :
+	protocol::PacketHandler(a_Connection, a_World) {
+	m_Slot.Connect(m_Connection.OnPlayerLeave, this, &PlayerLeaveHandler::Handle);
+}
+
+void PlayerLeaveHandler::Handle(const protocol::data::PlayerLeave& a_PlayerLeave) {
+	auto world = m_World.load();
+
+	entt::entity playerLeft;
+
+	for (auto [player, playerInfo] : world->GetRegistry().view<PlayerInfoComponent>().each()) {
+		if (playerInfo.m_PlayerId == a_PlayerLeave.m_PlayerId) {
+			playerLeft = player;
+			break;
+		}
+	}
+
+	world->GetRegistry().destroy(playerLeft);
+}
+
+PlayerLeaveHandler::~PlayerLeaveHandler() {}
+
+}  // namespace client
+}  // namespace blitz

src/client/handlers/PlayerListHandler.cpp

@@ -0,0 +1,22 @@
+#include <client/handlers/PlayerListHandler.h>
+
+namespace blitz {
+namespace client {
+
+PlayerListHandler::PlayerListHandler(network::EnetConnection& a_Connection, EnttWorld& a_World) :
+	protocol::PacketHandler(a_Connection, a_World) {
+	m_Slot.Connect(m_Connection.OnPlayerList, this, &PlayerListHandler::Handle);
+}
+
+void PlayerListHandler::Handle(const protocol::data::PlayerList& a_PlayerList) {
+	auto world = m_World.load();
+	for (auto playerInfo : a_PlayerList.m_Players) {
+		auto player = world->CreateEntity();
+		player.emplace<PlayerInfoComponent>(playerInfo);
+	}
+}
+
+PlayerListHandler::~PlayerListHandler() {}
+
+}  // namespace client
+}  // namespace blitz

src/server/Server.cpp

@@ -1,14 +1,19 @@
 #include <server/Server.h>
 
 #include <server/components/EnetConnection.h>
-#include <server/components/KeepAliveSession.h>
+#include <server/components/ServerIdCounter.h>
+
 #include <server/handlers/KeepAliveHandler.h>
+#include <server/handlers/PlayerLoginHandler.h>
+
 #include <server/systems/DisconnectSystem.h>
 #include <server/systems/KeepAliveSystem.h>
 
 namespace blitz {
 namespace server {
 
+#define RegisterHandler(Handler) session.m_Handlers.push_back(std::make_unique<Handler>(*session.m_Connection, m_World))
+
 Server::Server(std::uint16_t a_Port, std::shared_ptr<Nz::EnttWorld> a_World) : m_NetworkServer(a_Port) {
 	m_World.store(a_World);
 	RegisterSystems();
@@ -39,7 +44,6 @@ void Server::CreateEntity(network::EnetConnection& a_Connection) {
 
 	auto entity = world->CreateEntity();
 
-	entity.emplace<KeepAliveSessionComponent>(a_Connection.GetPeerId(), 69, Nz::GetElapsedMilliseconds(), true);
 	entity.emplace<EnetConnectionComponent>(&a_Connection);
 }
 
@@ -47,10 +51,14 @@ void Server::RegisterSystems() {
 	auto world = m_World.load();
 	world->AddSystem<KeepAliveSystem>();
 	world->AddSystem<DisconectSystem>(*this);
+
+	auto counter = world->CreateEntity();
+	counter.emplace<ServerIdCounterComponent>(0);
 }
 
 void Server::RegisterHandlers(Session& session) {
-	session.m_Handlers.push_back(std::make_unique<KeepAliveHandler>(*session.m_Connection, m_World));
+	RegisterHandler(KeepAliveHandler);
+	RegisterHandler(PlayerLoginHandler);
 }
 
 network::EnetConnection* Server::GetConnection(std::uint16_t a_PeerId) {

src/server/handlers/PlayerLoginHandler.cpp

@@ -0,0 +1,68 @@
+#include <server/handlers/PlayerLoginHandler.h>
+
+#include <Nazara/Core/Time.hpp>
+#include <blitz/components/PlayerInfo.h>
+#include <server/components/EnetConnection.h>
+#include <server/components/KeepAliveSession.h>
+#include <server/components/ServerIdCounter.h>
+
+namespace blitz {
+namespace server {
+
+PlayerLoginHandler::PlayerLoginHandler(network::EnetConnection& a_Connection, EnttWorld& a_World) :
+	protocol::PacketHandler(a_Connection, a_World) {
+	m_Slot.Connect(a_Connection.OnPlayerLogin,
+		[this](const protocol::data::PlayerLogin& a_PlayerLogin) { Handle(m_Connection.GetPeerId(), a_PlayerLogin); });
+}
+
+PlayerLoginHandler::~PlayerLoginHandler() {}
+
+void PlayerLoginHandler::Handle(std::uint16_t a_PeerId, const protocol::data::PlayerLogin& a_PlayerLogin) {
+	auto world = m_World.load();
+
+	std::vector<PlayerInfoComponent> players;
+
+	for (auto [entity, playerInfo] : world->GetRegistry().view<PlayerInfoComponent>().each()) {
+		players.push_back(playerInfo);
+	}
+
+	assert(world->GetRegistry().view<ServerIdCounterComponent>().size() == 1 && "There should be only one counter !");
+
+	auto& serverCounter =
+		world->GetRegistry().get<ServerIdCounterComponent>(world->GetRegistry().view<ServerIdCounterComponent>().front());
+
+	EntityID newEntityId = serverCounter.m_NextEntityId++;
+
+	PlayerInfoComponent newPlayer;
+
+	for (auto [entity, connection] : world->GetRegistry().view<EnetConnectionComponent>().each()) {
+		if (connection.m_Connection->GetPeerId() == m_Connection.GetPeerId()) {
+			// players should not try to log in twice
+			auto previousPlayerInfo = world->GetRegistry().try_get<PlayerInfoComponent>(entity);
+			if (previousPlayerInfo)
+				return;
+
+			newPlayer = world->GetRegistry().emplace<PlayerInfoComponent>(entity, newEntityId, a_PlayerLogin.m_PlayerName);
+
+			world->GetRegistry().emplace<KeepAliveSessionComponent>(
+				entity, m_Connection.GetPeerId(), 69, Nz::GetElapsedMilliseconds(), true);
+
+			break;
+		}
+	}
+
+	// send logging success
+	m_Connection.SendLoggingSuccess({newEntityId});
+
+	// send player list
+	if (!players.empty())
+		m_Connection.SendPlayerList({players});
+
+	// broadcast player join
+	for (auto [entity, connection] : world->GetRegistry().view<EnetConnectionComponent>().each()) {
+		connection.m_Connection->SendPlayerJoin({newPlayer});
+	}
+}
+
+}  // namespace server
+}  // namespace blitz

src/server/systems/DisconnectSystem.cpp

@@ -11,14 +11,26 @@ namespace server {
 DisconectSystem::DisconectSystem(entt::registry& a_Registry, Server& a_Server) : m_Registry(a_Registry), m_Server(a_Server) {}
 
 void DisconectSystem::Update(Nz::Time elapsedTime) {
+	auto disconnects = m_Registry.view<DisconnectComponent>();
+
+	// broadcast player leave
+	for (auto entity : disconnects) {
+		auto* player = m_Registry.try_get<PlayerInfoComponent>(entity);
+		if (player) {
+			for (auto [entity, connection] : m_Registry.view<EnetConnectionComponent>().each()) {
+				connection.m_Connection->SendPlayerLeave({player->m_PlayerId});
+			}
+		}
+	}
+
+	// close connections
 	m_Registry.view<EnetConnectionComponent, DisconnectComponent>().each(
 		[this](auto entity, EnetConnectionComponent& connection, DisconnectComponent disconnect) {
 			m_Server.CloseConnection(connection.m_Connection->GetPeerId());
 		});
 
 	// remove the entities
-	auto it = m_Registry.view<DisconnectComponent>();
-	m_Registry.destroy(it.begin(), it.end());
+	m_Registry.destroy(disconnects.begin(), disconnects.end());
 }
 
 }  // namespace server