Make sure to only dump menu files once

src/ObjWriting/Dumping/AssetDumpingContext.h

@@ -3,13 +3,17 @@
 #include <string>
 #include <ostream>
 #include <memory>
+#include <typeindex>
 
+#include "IZoneAssetDumperState.h"
 #include "Utils/ClassUtils.h"
 #include "Obj/Gdt/GdtStream.h"
 #include "Zone/Zone.h"
 
 class AssetDumpingContext
 {
+    std::unordered_map<std::type_index, std::unique_ptr<IZoneAssetDumperState>> m_zone_asset_dumper_states;
+
 public:
     Zone* m_zone;
     std::string m_base_path;
@@ -18,4 +22,21 @@ public:
     AssetDumpingContext();
 
     _NODISCARD std::unique_ptr<std::ostream> OpenAssetFile(const std::string& fileName) const;
+
+    template<typename T>
+    T* GetZoneAssetDumperState()
+    {
+        static_assert(std::is_base_of_v<IZoneAssetDumperState, T>, "T must inherit IZoneAssetDumperState");
+        // T must also have a public default constructor
+
+        const auto foundEntry = m_zone_asset_dumper_states.find(typeid(T));
+        if (foundEntry != m_zone_asset_dumper_states.end())
+            return dynamic_cast<T*>(foundEntry->second.get());
+
+        auto newState = std::make_unique<T>();
+        newState->SetZone(m_zone);
+        auto* newStatePtr = newState.get();
+        m_zone_asset_dumper_states.emplace(std::make_pair<std::type_index, std::unique_ptr<IZoneAssetDumperState>>(typeid(T), std::move(newState)));
+        return newStatePtr;
+    }
 };

src/ObjWriting/Dumping/IZoneAssetDumperState.h

@@ -0,0 +1,20 @@
+#pragma once
+#include "Zone/Zone.h"
+
+class IZoneAssetDumperState
+{
+protected:
+    IZoneAssetDumperState() = default;
+
+public:
+    virtual ~IZoneAssetDumperState() = default;
+    IZoneAssetDumperState(const IZoneAssetDumperState& other) = default;
+    IZoneAssetDumperState(IZoneAssetDumperState&& other) noexcept = default;
+    IZoneAssetDumperState& operator=(const IZoneAssetDumperState& other) = default;
+    IZoneAssetDumperState& operator=(IZoneAssetDumperState&& other) noexcept = default;
+
+    virtual void SetZone(Zone* zone)
+    {
+        // Do nothing by default
+    }
+};