Medium article: SLC part 1 - Coordinator

AuthenticationCoordinator.swift

private extension AuthenticationCoordinator {

    func toAuthentication() {
        let viewModel = AuthenticateViewModel()

        push(scene: Authenticate.self, viewModel: viewModel) { [unowned self] userIntendsTo in
            switch userIntendsTo {
            case .signUp: self.toSignIn()
            case .signIn: self.toSignUp()
            }
        }
    }

    func toSignIn() { /* Push SignIn scene */ }
    func toSignUp() { /* Push SignUp scene */ }
}