SimpleEngine/include/simpleengine/entity.h

//
// Created by SeanOMik on 7/2/2020.
// Github: https://github.com/SeanOMik
// Email: seanomik@gmail.com
//

#ifndef SIMPLEENGINE_ENTITY_H
#define SIMPLEENGINE_ENTITY_H

#include <SFML/Graphics.hpp>

#include <vector>
#include <memory>

namespace simpleengine {
    class Component;
    class Game;
    class Event;

    class Entity : std::enable_shared_from_this<Entity> {
        friend class Game;
        friend class Event;
    public:
        Entity() = default;
        virtual ~Entity() = default;
        Entity(const Entity& entity) = delete;

        virtual void Move(const float& delta_time, const float& x, const float& y) {};
        virtual void Update(const float& delta_time) = 0;
        virtual void Render(sf::RenderTarget* target) = 0;

        // Called when the entity is about to be destroyed.
        // Make sure to call this in your extending Entity.
        virtual void Destroying();

        void DestroyLater(); // In most cases, this will be ran next EntityEvent::Update()
        const bool& IsGettingDestroyed() const;

        // If your event does not extend from EntityEvent, you will need to execute this yourself inside Event::Update.
        void UpdateComponents(const float& delta_time);

        void AddComponent(std::unique_ptr<Component> component);

        std::shared_ptr<Entity> GetShared() {
            return shared_from_this();
        }
    private:
        // This is ran from class `Game` and `Event`. It runs the `UpdateComponents` method and then the `Update` method.
        void UpdateEntity(const float& delta_time) {
            UpdateComponents(delta_time);
        }

        std::vector<std::unique_ptr<Component>> components;
        bool destroying = false;
    };
}

#endif //GAMEENGINE_ENTITY_H