implemented the ModalNavigationRouter router in the Core library that inherits from the BaseNavigationRouter class.

Apps/Locations/Libraries/Sources/Core/Routers/ModalNavigationRouter.swift

@@ -0,0 +1,85 @@
+//
+//  ModalNavigationRouter.swift
+//  Core
+//
+//  Created by Javier Cicchelli on 11/04/2023.
+//  Copyright © 2023 Röck+Cöde. All rights reserved.
+//
+
+import UIKit
+
+public class ModalNavigationRouter: BaseNavigationRouter {
+    
+    // MARK: Properties
+    
+    /// The parent view controller from where this router is being called from.
+    public unowned let parentViewController: UIViewController
+
+    // MARK: Initialisers
+    
+    /// Initialise this router.
+    /// - Parameter parentViewController: A `UIViewController` view controller instance from where this router is originated.
+    public init(parentViewController: UIViewController) {
+        self.parentViewController = parentViewController
+        
+        super.init(navigationController: .init())
+    }
+    
+}
+
+extension ModalNavigationRouter: Router {
+    public func present(
+        _ viewController: UIViewController,
+        animated: Bool,
+        onDismiss: OnDismissedClosure?
+    ) {
+        onDismissForViewController[viewController] = onDismiss
+        
+        if navigationController.viewControllers.isEmpty {
+            presentModally(viewController, animated: animated)
+        } else {
+            navigationController.pushViewController(viewController, animated: animated)
+        }
+    }
+    
+    public func dismiss(animated: Bool) {
+        guard let firstViewController = navigationController.viewControllers.first else {
+            return
+        }
+        
+        performOnDismissed(for: firstViewController)
+        
+        parentViewController.dismiss(animated: animated)
+    }
+    
+}
+
+// MARK: - Helpers
+
+private extension ModalNavigationRouter {
+    
+    // MARK: Functions
+    
+    func presentModally(_ viewController: UIViewController, animated: Bool) {
+        viewController.navigationItem.leftBarButtonItem = UIBarButtonItem(
+            title: "Cancel",
+            style: .plain,
+            target: self,
+            action: #selector(onCancelPressed)
+        )
+        
+        navigationController.setViewControllers([viewController], animated: false)
+        
+        parentViewController.present(navigationController, animated: animated)
+    }
+    
+    @objc func onCancelPressed() {
+        guard let firstViewController = navigationController.viewControllers.first else {
+            return
+        }
+        
+        performOnDismissed(for: firstViewController)
+        dismiss(animated: true)
+    }
+    
+}