/*

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

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Demonstrates the APIs to check and request access to photos.

 */

import Foundation

import Photos

class PhotoAccessProvider: NSObject, PrivateDataAccessProvider {

    var accessLevel: PrivateDataAccessLevel {

        let authorizationStatus = PHPhotoLibrary.authorizationStatus()

        return authorizationStatus.accessLevel

    }

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

        PHPhotoLibrary.requestAuthorization { (authorizationStatus) in

            DispatchQueue.main.async {

                completionHandler(PrivateDataRequestAccessResult(authorizationStatus.accessLevel))

            }

        }

    }

}

extension PHAuthorizationStatus: PrivateDataAccessLevelConvertible {

    var accessLevel: PrivateDataAccessLevel {

        switch self {

        case .authorized:

            return .granted

        case .denied:

            return .denied

        case .notDetermined:

            return .undetermined

        case .restricted:

            return .restricted

        }

    }

}