UsingSimpleAlert.swift

class ExampleUsage: SimpleAlertDelegate {

private func configureRestPeriodAlert(lastStimulationTime: Date) -> SimpleAlertViewController {
        let alertStoryboard = UIStoryboard(name: "Alert", bundle: Bundle.main)
        guard let alertViewController = alertStoryboard.instantiateViewController(withIdentifier: "Alert") as? SimpleAlertViewController else { fatalError() }
        alertViewController.modalTransitionStyle = .coverVertical
        alertViewController.modalPresentationStyle = .overCurrentContext
        
        let viewModel = SimpleAlertViewController.ViewModel()
        viewModel.title.value = NSLocalizedString("RestPeriodAlertTitle", tableName: "", bundle: Bundle.main, value: "Rest Period", comment: "Title for alert which recommends waiting between Neuropriming sessions.")
        let messageTemplate = NSLocalizedString("RestPeriodAlertMessage", tableName: "", bundle: Bundle.main, value: "Research supports a rest period of at least 8 hours between Neuropriming sessions.\n\nTime since last session:\n%@", comment: "Message for alert which recommends waiting between Neuropriming sessions. Argument is the time that has passed since the end of the last session, formatted as hh:mm:ss")
        let messageFunc: (Int) -> (String) = { _ in return String(format: messageTemplate, lastStimulationTime.timeIntervalSinceNow.longStylizedSecondsString()) }
        
        SafeSignal<Int>.interval(1.0).map(messageFunc).bind(to: viewModel.message)
        viewModel.message.value = messageFunc(0)
        
        viewModel.primaryButtonTitle.value = NSLocalizedString("RestPeriodAlertCancelButtonTitle", tableName: "", bundle: Bundle.main, value: "Wait", comment: "Title for alert button which indicates that the user will wait instead of proceeding with a new session.")
        viewModel.secondaryButtonTitle.value = NSLocalizedString("RestPeriodAlertContinueButtonTitle", tableName: "", bundle: Bundle.main, value: "Continue", comment: "Title for alert button which indicates that the user will proceed with a new session despite the recommendation to wait.")
        alertViewController.configure(viewModel: viewModel, delegate: self)
        
        return alertViewController
    }

    func didTapPrimaryButton(alertViewController: SimpleAlertViewController) { /* */ }
    func didTapSecondaryButton(alertViewController: SimpleAlertViewController) { /* */ }
  
    func didAttemptToStimulate() {
        let lastStimulationTime = Date() // 
        self.vc?.present(configureRestPeriodAlert(lastStimulationTime: lastStimulationTime), animated: true, completion: nil)
    }
}