1 files changed, 95 insertions, 0 deletions
diff --git a/src/brussel.engine/Level.hpp b/src/brussel.engine/Level.hpp
new file mode 100644
index 0000000..c030b8e
--- /dev/null
+++ b/src/brussel.engine/Level.hpp
@@ -0,0 +1,95 @@
+#pragma once
+
+#include "EditorCore.hpp"
+#include "GameObject.hpp"
+
+#include <MacrosCodegen.hpp>
+#include <RcPtr.hpp>
+#include <Uid.hpp>
+
+#include <robin_hood.h>
+#include <filesystem>
+#include <vector>
+
+// Forward declarations
+class Level;
+class LevelManager;
+
+/// Represents a seralized GameObject tree.
+class Level : public RefCounted {
+	friend class LevelManager;
+
+private:
+	struct InstanciationEntry;
+
+	LevelManager* mMan;
+	Uid mUid;
+	std::vector<InstanciationEntry> mEntries;
+
+public:
+	Level();
+	~Level();
+
+	void Instanciate(GameObject* relRoot) const;
+
+	LevelManager* GetLinkedLevelManager() const { return mMan; }
+	const Uid& GetUid() const { return mUid; }
+
+	// Editor stuff
+	void ShowInstanciationEntries(IEditor& editor);
+};
+
+class LevelManager {
+public:
+	static inline LevelManager* instance = nullptr;
+
+public: // NOTE: public for the editor; actual game components should not modify the map using this
+	// TODO maybe cut this struct to only the first RcPtr<Level> field in release mode?
+	struct LoadableObject {
+		RcPtr<Level> level; // TODO make weak pointer
+		std::filesystem::path filePath;
+		// NOTE: these fields are only loaded in dev mode
+		std::string name;
+		std::string description;
+
+		// Editor book keeping fields
+		bool edited = false;
+	};
+	// We want pointer stability here for the editor (inspector object)
+	robin_hood::unordered_node_map<Uid, LoadableObject> mObjByUid;
+
+public:
+	void DiscoverFilesDesignatedLocation();
+	void DiscoverFiles(const std::filesystem::path& dir);
+
+	Level* FindLevel(const Uid& uid) const;
+	/// Get or load the given level
+	Level* LoadLevel(const Uid& uid);
+	/// Send the given level to be loaded on another thread
+	void PrepareLevel(const Uid& uid);
+
+	/// Create and add a new level object with the given uid.
+	/// Should only be used by the editor.
+	LoadableObject& AddLevel(const Uid& uid);
+	/// Should only be used by the editor.
+	void SaveLevel(const Uid& uid) const;
+	/// Should only be used by the editor.
+	void SaveLevel(const Uid& uid, const std::filesystem::path& path) const;
+
+private:
+	void SaveLevelImpl(const LoadableObject& obj, const std::filesystem::path& path) const;
+};
+
+class LevelWrapperObject : public GameObject {
+	BRUSSEL_CLASS()
+
+private:
+	RcPtr<Level> mLevel;
+
+public:
+	LevelWrapperObject(GameWorld* world);
+	~LevelWrapperObject() override;
+
+	Level* GetBoundLevel() const;
+	void SetBoundLevel(Level* level);
+};