tutorials/tutorial4-completed/TicTacToe/Root/RootViewController.swift

//
//  Copyright (c) 2017. Uber Technologies
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//

import RIBs
import SnapKit
import UIKit

protocol RootPresentableListener: AnyObject {
    // TODO: Declare properties and methods that the view controller can invoke to perform
    // business logic, such as signIn(). This protocol is implemented by the corresponding
    // interactor class.
}

final class RootViewController: UIViewController, RootPresentable, RootViewControllable {

    weak var listener: RootPresentableListener?

    init() {
        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("Method is not supported")
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        view.backgroundColor = UIColor.white
    }

    // MARK: - RootViewControllable

    func replaceModal(viewController: ViewControllable?) {
        targetViewController = viewController

        guard !animationInProgress else {
            return
        }

        if presentedViewController != nil {
            animationInProgress = true
            dismiss(animated: true) { [weak self] in
                if self?.targetViewController != nil {
                    self?.presentTargetViewController()
                } else {
                    self?.animationInProgress = false
                }
            }
        } else {
            presentTargetViewController()
        }
    }

    // MARK: - Private

    private var targetViewController: ViewControllable?
    private var animationInProgress = false

    private func presentTargetViewController() {
        if let targetViewController = targetViewController {
            animationInProgress = true
            present(targetViewController.uiviewController, animated: true) { [weak self] in
                self?.animationInProgress = false
            }
        }
    }
}

// MARK: LoggedInViewControllable

extension RootViewController: LoggedInViewControllable {

}