PhotoLibraryAuthorizer.swift
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//
// PhotoLibraryAuthorizer.swift
// ALCameraViewController
//
// Created by Alex Littlejohn on 2016/03/26.
// Copyright © 2016 zero. All rights reserved.
//
import UIKit
import Photos
public typealias PhotoLibraryAuthorizerCompletion = (NSError?) -> Void
class PhotoLibraryAuthorizer {
private let errorDomain = "com.zero.imageFetcher"
private let completion: PhotoLibraryAuthorizerCompletion
init(completion: @escaping PhotoLibraryAuthorizerCompletion) {
self.completion = completion
handleAuthorization(status: PHPhotoLibrary.authorizationStatus())
}
func onDeniedOrRestricted(completion: PhotoLibraryAuthorizerCompletion) {
let error = errorWithKey("error.access-denied", domain: errorDomain)
completion(error)
}
func handleAuthorization(status: PHAuthorizationStatus) {
switch status {
case .notDetermined:
PHPhotoLibrary.requestAuthorization(handleAuthorization)
break
case .authorized:
DispatchQueue.main.async {
self.completion(nil)
}
break
case .denied, .restricted:
DispatchQueue.main.async {
self.onDeniedOrRestricted(completion: self.completion)
}
break
}
}
}