Separating state out of the location

src/GameState.cpp

@@ -1,4 +1,5 @@
 #include "GameState.h"
+#include "utils/Utils.h"
 #include <ctime>
 #include <iomanip>
 #include <sstream>
@@ -209,8 +210,8 @@ void GameState::load(const nlohmann::json& in)
 
     // --- Players ---
     const auto& playerValues = in.at("players");
-    if (!playerValues.is_object() || !playerValues.contains("player"))
-        throw std::runtime_error("Game state requires players.player");
+    if (!playerValues.is_object())
+        throw std::runtime_error("Game state players must be an object");
     for (const auto& [id, value] : playerValues.items()) {
         auto& player = players[id];
         if (!player) player = std::make_shared<CharacterState>();
@@ -224,7 +225,9 @@ void GameState::load(const nlohmann::json& in)
 
     // --- Locations ---
     const auto& locationValues = in.at("locations");
-    if (!locationValues.is_object() ||
+    if (!locationValues.is_object())
+        throw std::runtime_error("Game state locations must be an object");
+    if (!currentLocationName.empty() &&
         !locationValues.contains(currentLocationName))
         throw std::runtime_error(
             "Game state does not contain current location '" +