SceneDelegate.swift

import UIKit
import Catalog
import Shared

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?


    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
        guard let windowScene = (scene as? UIWindowScene) else { return }
        let window = UIWindow(windowScene: windowScene)
        self.window = window
        let rootNavigationController = UINavigationController(rootViewController: CatalogPageViewController())
        window.rootViewController = rootNavigationController
        window.makeKeyAndVisible()
        
        Router.route = { destination in
            switch destination {
            case let .productDetailPage(product):
                let productController = ProductDetailPageViewController(product: product)
                UIApplication.topViewController()?.navigationController?.pushViewController(productController, animated: true)
            }
        }
    }
    //rest of the code
}