Set up basic deterministic lockstep

src/game_server/WebsocketGameClient.h

@@ -2,6 +2,8 @@
 
 #include "IGameServer.h"
 #include "InternalGameServer.h"
+#include "NetworkProtocol.h"
+#include <map>
 #include <memory>
 #include <string>
 
@@ -30,12 +32,32 @@ public:
 
 	bool connected() const;
 	bool connectionFailed() const;
+	bool initialized() const { return initialized_; }
+	bool rejected() const { return rejected_; }
 
 private:
 	friend class RemoteGameServerHost;
+	struct CompletedSimulationTick {
+		std::string locationId;
+		LocationSimulationEvents events;
+	};
+	std::vector<CompletedSimulationTick> takeCompletedSimulationTicks();
+	void expectCompatibility(std::string fingerprint) {
+		expectedCompatibilityFingerprint_ = std::move(fingerprint);
+	}
 	class Impl;
 	InternalGameServer replica_;
 	std::unique_ptr<Impl> impl_;
+	std::map<std::uint64_t, TickMessage> pendingTicks_;
+	std::vector<CompletedSimulationTick> completedSimulationTicks_;
+	std::vector<GameServerEvent> pendingEvents_;
+	std::uint64_t nextExpectedTick_ = 0;
+	std::uint64_t nextClientSequence_ = 1;
+	std::string compatibilityFingerprint_;
+	std::string expectedCompatibilityFingerprint_;
+	bool initialized_ = false;
+	bool rejected_ = false;
+	bool loggedFirstTick_ = false;
 };
 
 } // namespace FRG