componentSystem.h

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2025-2026 Arnis Lektauers
//
// Created by Arnis Lektauers on 05.09.2025.
//
 
#pragma once
 
#include <string>
#include <typeinfo>
 
#include "component.h"
#include "framework/engine.h"
#include "framework/entity.h"
 
namespace visutwin::canvas
{
    class IComponentSystem
    {
    public:
        virtual ~IComponentSystem() = default;
        IComponentSystem(Engine* engine, const std::string& id) : _engine(engine), _id(id) {}
 
        virtual std::unique_ptr<Component> addComponent(Entity* entity) = 0;
 
        [[nodiscard]] const std::string& id() const { return _id; }
        Engine* engine() const { return _engine; }
 
        virtual const std::type_info& componentType() const = 0;
    protected:
        std::string _id;
        Engine* _engine;
    };
 
    /*
    * Component Systems contain the logic and functionality to update all Components of a particular type
    */
    template <class ComponentType, class DataType>
    class ComponentSystem : public IComponentSystem
    {
    public:
        ComponentSystem(Engine* engine, const std::string& id) : IComponentSystem(engine, id) {}
 
        // Create new Component and component data instances and attach them to the entity.
        std::unique_ptr<Component> addComponent(Entity* entity) override;
 
        const std::type_info& componentType() const override { return typeid(ComponentType); }
    };
}
 
#include "componentSystem.inl"