/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A protocol extension that adds methods to `ButtonNodeResponderType` to enable screen recording with ReplayKit.

*/

import ReplayKit

/// The `NSUserDefaults` key used to store whether screen recording has been enabled.

let screenRecorderEnabledKey = "AppConfiguration.Defaults.screenRecorderEnabledKey"

/*

    Extend `ButtonNodeResponderType` to add methods for screen recording with ReplayKit.

    The type constraint ensures that only types that are `BaseScene` instances will

    get this additional functionality.

*/

extension ButtonNodeResponderType where Self: BaseScene {

    func toggleScreenRecording(button: ButtonNode) {

        button.isSelected = !button.isSelected

        UserDefaults.standard.set(button.isSelected, forKey: screenRecorderEnabledKey)

    }

    func displayRecordedContent() {

        guard let previewViewController = previewViewController else { fatalError("The user requested playback, but a valid preview controller does not exist.") }

        guard let rootViewController = view?.window?.rootViewController else { fatalError("The scene must be contained in a window with a root view controller.") }

        // `RPPreviewViewController` only supports full screen modal presentation.

        previewViewController.modalPresentationStyle = UIModalPresentationStyle.fullScreen

        rootViewController.present(previewViewController, animated: true, completion:nil)

    }

}