AnyPath.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2022 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "AnyGenerator.hpp"
#include "Edge.hpp"
#include "PathVertex.hpp"
 
#include "CeresEngine/Foundation/SmartPtr.hpp"
 
namespace CeresEngine::MeshGenerator {
 
    class AnyPath {
    public:
        template<typename Path> AnyPath(Path path) : mBase{new Derived<Path>{std::move(path)}} {}
 
        AnyPath(const AnyPath& that);
        AnyPath& operator=(const AnyPath& that);
 
        AnyPath(AnyPath&&) = default;
        AnyPath& operator=(AnyPath&&) = default;
 
        [[nodiscard]] AnyGenerator<Edge> edges() const noexcept;
        [[nodiscard]] AnyGenerator<PathVertex> vertices() const noexcept;
 
    private:
        class Base {
        public:
            virtual ~Base();
            [[nodiscard]] virtual UPtr<Base> clone() const = 0;
            [[nodiscard]] virtual AnyGenerator<Edge> edges() const = 0;
            [[nodiscard]] virtual AnyGenerator<PathVertex> vertices() const = 0;
        };
 
        template<typename Path> class Derived : public Base {
        public:
            Derived(Path path) : mPath(std::move(path)) {}
 
            [[nodiscard]] virtual UPtr<Base> clone() const override { return UPtr<Base>{new Derived{mPath}}; }
            [[nodiscard]] virtual AnyGenerator<Edge> edges() const override { return mPath.edges(); }
            [[nodiscard]] virtual AnyGenerator<PathVertex> vertices() const override { return mPath.vertices(); }
 
            Path mPath;
        };
 
        UPtr<Base> mBase;
    };
 
} // namespace CeresEngine::MeshGenerator