systemManager.h

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#pragma once
 
#include "system.h"
#include <atomic>
#include <functional>
#include <memory>
#include <unordered_map>
#include "../Datastructures/eventmap.h"
#include "../Entity/entity.h"
 
namespace Saga {
 
class SystemManager {
public:
    enum class Stage {
        Awake,
        Start,
        PreUpdate,
        Update,
        LateUpdate,
        FixedUpdate,
        LateFixedUpdate,
        Draw,
        Cleanup
    };
 
    enum Id : uint64_t {};
 
public:
    SystemManager();
    virtual ~SystemManager();
 
    template <typename ...DataType>
    EventMap::Id addStagedSystem(std::shared_ptr<System<DataType...>> system, Stage stage = Stage::Update);
 
    void removeStagedSystem(EventMap::Id id, Stage stage = Stage::Update);
 
    template <typename Event, typename ...DataType>
    EventMap::Id addEventSystem(Event event, std::shared_ptr<System<DataType...>> system);
 
    template <typename Event>
    void removeEventSystem(Event event, EventMap::Id id);
 
    template <typename Event, typename ...DataType>
    EventMap::Id addEventSystem(Event event, Saga::Entity entity, std::shared_ptr<System<Saga::Entity, DataType...>> system);
 
    template <typename Event>
    void removeEventSystem(Event event, Saga::Entity entity, EventMap::Id id);
 
    EventMap::Id addKeyboardEventSystem(int key, System<int> system);
 
    void removeKeyboardEventSystem(int key, EventMap::Id id);
 
    EventMap::Id addMouseEventSystem(int key, System<int> system);
 
    void removeMouseEventSystem(int key, EventMap::Id id);
 
    EventMap::Id addMousePosSystem(System<double, double> system);
    void removeMousePosSystem(EventMap::Id id);
 
    EventMap::Id addScrollSystem(System<double> system);
    void removeScrollSystem(EventMap::Id id);
 
    EventMap::Id addWindowResizeSystem(System<int, int> system);
 
    void removeWindowResizeSystem(EventMap::Id id);
 
protected:
    enum class OtherInput {
        MOUSE_POS,
        SCROLL,
        WINDOW_RESIZE
    };
    static auto id_value()
        -> uint64_t & {
        static uint64_t the_id;
        return the_id;
    }
 
    EventMap stagedSystemsMap;
 
    std::unordered_map<int, EventMap> eventSystemsMap;
 
    // input maps
    EventMap keyboardInputMap;
    EventMap mouseInputMap;
    EventMap otherInputMap; //< scroll and mouse pos falls into this category
};
} // namespace Saga
 
#include "systemManager.inl"