VIPER vs VIPE.kt

class LoginContracts {
  interface View {
    fun showError(message: String)
    //fun presentHomeScreen(user: User) <- This is no longer a part of the View's responsibilities
  }

  interface Router {
    fun presentHomeScreen(user: User) // Now the router handles it
  }
}

class LoginPresenter(var view: LoginContracts.View?): LoginContracts.Presenter, LoginContracts.InteractorOutput {
    var interactor: LoginContracts.Interactor? = LoginInteractor(this)
    //now the presenter has a instance of the Router and passes the Activity to it on the constructor
    var router: LoginContracts.Router? = LoginRouter(view as? Activity)
    
    //...
  
    fun onLoginSuccess(user: User) {
      router?.presentHomeScreen(user)
    }
    
    //...
}

class LoginRouter(var activity: Activity?): LoginContracts.Router {
  fun presentHomeScreen(user: User) {
    val intent = Intent(view, HomeActivity::class.java)
    intent.putExtra(Constants.IntentExtras.USER, user)
    activity?.startActivity(intent)
  }
}