state.h

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#ifndef STATE_H
#define STATE_H
 
#include <MazeBuilder/runtime_app.h>
 
#include <functional>
#include <optional>
 
namespace mazes
{
    class args;
    class runtime_stack;
 
    struct state
    {
        enum class ID : unsigned int
        {
            BTING = 0,
            DFSING = 1,
            EMPTY = 2,
            LOADING = 3,
            PARSING = 4,
            PIXELIZING = 5,
            SIDEWINDERING = 6,
            STRINGIFYING = 7,
            WAVEFRONT_OBJECTIFYING = 8,
            TOTAL = 9
        };
 
        explicit state(const runtime_app::context& c, runtime_stack* rs)
            : ctx(c), _runtime_stack(rs)
        {
        }
 
        virtual ~state() = default;
 
        virtual void draw() const noexcept = 0;
 
        virtual bool update(const std::optional<args>& args, double delta_time) noexcept = 0;
 
    protected:
        void request_stack_push(ID state_id) const noexcept;
 
        void request_stack_pop() const noexcept;
 
        void request_stack_clear() const noexcept;
 
        [[nodiscard]] const runtime_app::context& get_context() const noexcept;
 
        [[nodiscard]] runtime_stack& get_stack() const noexcept;
 
    private:
        std::reference_wrapper<const runtime_app::context> ctx;
        runtime_stack* _runtime_stack;
    };
} // namespace mazes
 
#endif // STATE_H