/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Demonstrates the API to request write only access to photos.

 */

import Foundation

import UIKit

class PhotoWriteOnlyAccessProvider: NSObject, PrivateDataAccessRequestProvider {

    var requestAccessCompletionHandler: PrivacyActionRequestAccessHandler?

    func requestAccess(completionHandler: @escaping (PrivateDataRequestAccessResult) -> Void) {

        requestAccessCompletionHandler = completionHandler

        let food = #imageLiteral(resourceName: "Food.jpg")

        UIImageWriteToSavedPhotosAlbum(food, self, #selector(image(_:didFinishSaving:contextInfo:)), nil)

    }

    @objc

    private func image(_ image: UIImage, didFinishSaving error: NSError?, contextInfo: Any?) {

        if let completionHandler = requestAccessCompletionHandler {

            let result = PrivateDataRequestAccessResult(error == nil ? .granted : .denied)

            completionHandler(result)

        }

        // Breaks reference cycle so this object can deinit.

        requestAccessCompletionHandler = nil

    }

}