componentGroup.h

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#pragma once
 
#include <vector>
#include <unordered_map>
#include <memory>
#include "../Entity/entity.h"
#include "gameworld.h"
#include "componentReference.h"
 
namespace Saga {
 
class IComponentGroup {
public:
    virtual ~IComponentGroup() = default;
    virtual void addEntity(std::shared_ptr<GameWorld> world, const Entity& entity) = 0;
 
    virtual void removeEntity(Entity entity) = 0;
};
 
template <typename... Component>
class ComponentGroup : public IComponentGroup {
public:
    virtual ~ComponentGroup() {}
 
    virtual void addEntity(std::shared_ptr<GameWorld> world, const Entity& entity) override;
 
    virtual void removeEntity(Entity entity) override;
 
    typename std::vector<std::tuple<Entity, ComponentReference<Component>...>>::iterator begin();
    typename std::vector<std::tuple<Entity, ComponentReference<Component>...>>::iterator end();
    typename std::vector<std::tuple<Entity, ComponentReference<Component>...>>::const_iterator begin() const;
    typename std::vector<std::tuple<Entity, ComponentReference<Component>...>>::const_iterator end() const;
private:
    std::vector<std::tuple<Entity, ComponentReference<Component>...>> allData; 
    std::unordered_map<Entity, size_t> entityToIndex; 
 
    std::tuple<Entity, ComponentReference<Component>...> createTuple(std::shared_ptr<GameWorld> world, const Entity& entity);
};
 
} // namespace Saga
 
#include "componentGroup.inl"