Working on save-load system and UI

src/GameState.h

@@ -2,6 +2,8 @@
 #include "items/Item.h"
 #include "quest/QuestJournal.h"
 #include "Location.h"
+#include "ISaveable.h"
+#include "external/nlohmann/json.hpp"
 #include <unordered_map>
 #include <string>
 #include <memory>
@@ -32,7 +34,7 @@ struct StoredChatMessage {
 	bool incoming;
 };
 
-struct GameState {
+struct GameState : public ISaveable {
 	// --- World ---
 	std::unordered_map<std::string, std::shared_ptr<Location>> locations;
 	std::string currentLocationName;
@@ -66,6 +68,9 @@ struct GameState {
 	bool        chatUnread[3]    = { true, true, true };
 	std::string chatPreviewMsg[3];
 	std::vector<StoredChatMessage> chatHistory[3];
+
+	void save(nlohmann::json& out) const override;
+	void load(const nlohmann::json& in) override;
 };
 
 } // namespace ZL