1 files changed, 67 insertions, 0 deletions
diff --git a/src/script.hpp b/src/script.hpp
new file mode 100644
index 00000000..bb403eda
--- /dev/null
+++ b/src/script.hpp
@@ -0,0 +1,67 @@
+#pragma once
+#include "compat/defs.hpp"
+#include <memory>
+
+namespace floormat
+{
+struct object;
+struct Ns;
+
+enum class script_lifecycle : uint8_t
+{
+    no_init, initializing, created, destroying, torn_down, COUNT,
+};
+
+struct base_script
+{
+    fm_DECLARE_DELETED_COPY_ASSIGNMENT(base_script);
+    fm_DECLARE_DELETED_MOVE_ASSIGNMENT(base_script);
+
+    base_script() noexcept;
+    virtual ~base_script() noexcept;
+
+    static StringView state_name(script_lifecycle x);
+};
+
+enum class script_destroy_reason : uint8_t
+{
+    quit,       // game is being shut down
+    kill,       // object is being deleted from the gameworld
+    unassign,   // script is unassigned from object
+    COUNT,
+};
+
+template<typename S, typename Obj>
+class Script final
+{
+    S* ptr;
+    script_lifecycle state;
+    void _assert_state(script_lifecycle s, const char* file, int line);
+
+public:
+    Script();
+    ~Script() noexcept;
+
+    // [no-init]        -> do_create()              -> [initializing]
+    // [initializing]   -> do_initialize()          -> [created]
+    // [created]        -> call()                   -> [created]
+    // [created]        -> do_reassign()            -> [no-init]
+    // [created]        -> do_destroy_pre()         -> [destroying]
+    // [destroying]     -> do_finish_destroy()      -> [torn-down]
+    // [torn-down]      -> do_ensure_torn_down()    -> [torn-down]
+    // *                -> do_error_unwind()        -> [torn-down]
+    // [torn-down]      -> ~script()
+
+    S* operator->();
+
+    void do_create(S* ptr);
+    void do_initialize(const std::shared_ptr<Obj>& obj);
+    void do_reassign(S* ptr, const std::shared_ptr<Obj>& obj);
+    void do_destroy_1(const std::shared_ptr<Obj>& obj);
+    void do_destroy_pre(const std::shared_ptr<Obj>& obj);
+    void do_finish_destroy();
+    void do_ensure_torn_down();
+    void do_error_unwind();
+};
+
+} // namespace floormat