implement server and client player join/leave notifications

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