SimpleAlertViewController.swift

import Foundation
import ReactiveKit
import Bond
import UIKit

protocol SimpleAlertDelegate: class {
    func didTapSecondaryButton(alertViewController: SimpleAlertViewController)
    func didTapPrimaryButton(alertViewController: SimpleAlertViewController)
}

class SimpleAlertViewController: UIViewController {
    
    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var messageTextView: UITextView!
    @IBOutlet weak var secondaryButton: UIButton!
    @IBOutlet weak var primaryButton: UIButton!
    
    struct ViewModel {
        let title = Property<String?>(nil)
        let message = Property<String?>(nil)
        let primaryButtonTitle = Property<String?>(nil)
        let secondaryButtonTitle = Property<String?>(nil)
    }
    
    private weak var delegate: SimpleAlertDelegate?
    private var viewModel: ViewModel?
    
    func configure(viewModel: ViewModel, delegate: SimpleAlertDelegate) {
        self.delegate = delegate
        self.viewModel = viewModel
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        guard let viewModel = viewModel else { fatalError() }
        
        viewModel.title.bind(to: titleLabel).dispose(in: bag)
        viewModel.message.bind(to: messageTextView).dispose(in: bag)
        viewModel.primaryButtonTitle.bind(to: primaryButton.reactive.title).dispose(in: bag)
        viewModel.secondaryButtonTitle.bind(to: secondaryButton.reactive.title).dispose(in: bag)
    }
    
    @IBAction func didTapSecondaryButton(_ sender: Any) {
        delegate?.didTapSecondaryButton(alertViewController: self)
    }
    
    @IBAction func didTapPrimaryButton(_ sender: Any) {
        delegate?.didTapPrimaryButton(alertViewController: self)
    }
}