send world to client

include/td/common/StateMachine.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include <cassert>
-#include <memory>
+#include <td/misc/Signal.h>
 
 namespace td {
 
@@ -16,7 +16,7 @@ class StateMachine {
 		virtual TReturn Update(TArgs... args) = 0;
 
 		template <typename T, typename... Args>
-		T* ChangeState(Args&&... args) {
+		T* ChangeState(Args... args) {
 			return m_StateMachine.template ChangeState<T>(std::forward<Args>(args)...);
 		}
 
@@ -24,18 +24,25 @@ class StateMachine {
 		TDerived& m_StateMachine;
 	};
 
+	utils::Signal<State&> OnStateChange;
+
 	StateMachine() {}
 	StateMachine(StateMachine&&) = default;
 	virtual ~StateMachine() {}
 
 	virtual TReturn Update(TArgs... args) {
 		assert(m_State && "You must change state at least once before updating !");
-		return m_State->Update(args...);
+		return m_State->Update(std::forward<TArgs>(args)...);
 	}
 
 	template <typename T, typename... Args>
-	T* ChangeState(Args&&... args) {
-		m_State = std::make_unique<T>(static_cast<TDerived&>(*this), std::forward<Args>(args)...);
+	T* ChangeState(Args... args) {
+		auto* currentState = m_State.get();
+		auto newState = std::make_unique<T>(static_cast<TDerived&>(*this), std::forward<Args>(args)...);
+		// This allows chaining
+		if (m_State.get() == currentState)
+			m_State = std::move(newState);
+		OnStateChange(*m_State);
 		return static_cast<T*>(m_State.get());
 	}
 

include/td/display/DisplayState.h

@@ -2,8 +2,10 @@
 
 #include <td/display/Display.h>
 #include <td/misc/SlotGuard.h>
+#include <client/ClientState.h>
 
 namespace td {
+
 class DisplayState : public Display::State, private utils::SlotGuard {
   public:
 	DisplayState(Display& a_Display);
@@ -13,4 +15,5 @@ class DisplayState : public Display::State, private utils::SlotGuard {
 	virtual void OnAspectRatioChange(float a_Ratio) {}
 	virtual void OnKeyDown(SDL_Keycode a_Key) {}
 };
+
 }  // namespace td

include/td/game/World.h

@@ -33,6 +33,9 @@ class World {
 	bool LoadMap(const protocol::pdata::WorldHeader& worldHeader);
 	bool LoadMap(const protocol::pdata::WorldData& worldData);
 
+	protocol::packets::WorldHeaderPacket GetPacketHeader() const;
+	protocol::packets::WorldDataPacket GetPacketData() const;
+
 	bool LoadMapFromFile(const std::string& fileName);
 	bool SaveMap(const std::string& fileName) const;