mastodon-ios/Mastodon/Service/NotificationService.swift

205 lines
7.9 KiB
Swift

//
// NotificationService.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-4-22.
//
import os.log
import UIKit
import Combine
import CoreData
import CoreDataStack
import MastodonSDK
import AppShared
final class NotificationService {
var disposeBag = Set<AnyCancellable>()
let workingQueue = DispatchQueue(label: "org.joinmastodon.Mastodon.NotificationService.working-queue")
// input
weak var apiService: APIService?
weak var authenticationService: AuthenticationService?
let isNotificationPermissionGranted = CurrentValueSubject<Bool, Never>(false)
let deviceToken = CurrentValueSubject<Data?, Never>(nil)
// output
/// [Token: UserID]
let notificationSubscriptionDict: [String: NotificationViewModel] = [:]
let hasUnreadPushNotification = CurrentValueSubject<Bool, Never>(false)
let requestRevealNotificationPublisher = PassthroughSubject<Mastodon.Entity.Notification.ID, Never>()
init(
apiService: APIService,
authenticationService: AuthenticationService
) {
self.apiService = apiService
self.authenticationService = authenticationService
authenticationService.mastodonAuthentications
.sink(receiveValue: { [weak self] mastodonAuthentications in
guard let self = self else { return }
// request permission when sign-in
guard !mastodonAuthentications.isEmpty else { return }
self.requestNotificationPermission()
})
.store(in: &disposeBag)
deviceToken
.receive(on: DispatchQueue.main)
.sink { [weak self] deviceToken in
guard let _ = self else { return }
guard let deviceToken = deviceToken else { return }
let token = [UInt8](deviceToken).toHexString()
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: deviceToken: %s", ((#file as NSString).lastPathComponent), #line, #function, token)
}
.store(in: &disposeBag)
}
}
extension NotificationService {
private func requestNotificationPermission() {
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound, .badge]) { [weak self] granted, error in
guard let self = self else { return }
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: request notification permission: %s", ((#file as NSString).lastPathComponent), #line, #function, granted ? "granted" : "fail")
self.isNotificationPermissionGranted.value = granted
if let _ = error {
// Handle the error here.
}
// Enable or disable features based on the authorization.
}
}
}
extension NotificationService {
func dequeueNotificationViewModel(
mastodonAuthenticationBox: AuthenticationService.MastodonAuthenticationBox
) -> NotificationViewModel? {
var _notificationSubscription: NotificationViewModel?
workingQueue.sync {
let domain = mastodonAuthenticationBox.domain
let userID = mastodonAuthenticationBox.userID
let key = [domain, userID].joined(separator: "@")
if let notificationSubscription = notificationSubscriptionDict[key] {
_notificationSubscription = notificationSubscription
} else {
let notificationSubscription = NotificationViewModel(domain: domain, userID: userID)
_notificationSubscription = notificationSubscription
}
}
return _notificationSubscription
}
func handle(mastodonPushNotification: MastodonPushNotification) {
hasUnreadPushNotification.value = true
// Subscription maybe failed to cancel when sign-out
// Try cancel again if receive that kind push notification
guard let managedObjectContext = authenticationService?.managedObjectContext else { return }
guard let apiService = apiService else { return }
managedObjectContext.perform {
let subscriptionRequest = NotificationSubscription.sortedFetchRequest
subscriptionRequest.predicate = NotificationSubscription.predicate(userToken: mastodonPushNotification.accessToken)
let subscriptions = managedObjectContext.safeFetch(subscriptionRequest)
// note: assert setting remove after cancel subscription
guard let subscription = subscriptions.first else { return }
guard let setting = subscription.setting else { return }
let domain = setting.domain
let userID = setting.userID
let authenticationRequest = MastodonAuthentication.sortedFetchRequest
authenticationRequest.predicate = MastodonAuthentication.predicate(domain: domain, userID: userID)
let authentication = managedObjectContext.safeFetch(authenticationRequest).first
guard authentication == nil else {
// do nothing if still sign-in
return
}
// cancel subscription if sign-out
let accessToken = mastodonPushNotification.accessToken
let mastodonAuthenticationBox = AuthenticationService.MastodonAuthenticationBox(
domain: domain,
userID: userID,
appAuthorization: .init(accessToken: accessToken),
userAuthorization: .init(accessToken: accessToken)
)
apiService
.cancelSubscription(mastodonAuthenticationBox: mastodonAuthenticationBox)
.sink { completion in
switch completion {
case .failure(let error):
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Push Notification] failed to cancel sign-out user subscription: %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
case .finished:
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: [Push Notification] cancel sign-out user subscription", ((#file as NSString).lastPathComponent), #line, #function)
}
} receiveValue: { _ in
// do nothing
}
.store(in: &self.disposeBag)
}
}
}
// MARK: - NotificationViewModel
extension NotificationService {
final class NotificationViewModel {
var disposeBag = Set<AnyCancellable>()
// input
let domain: String
let userID: Mastodon.Entity.Account.ID
// output
init(domain: String, userID: Mastodon.Entity.Account.ID) {
self.domain = domain
self.userID = userID
}
}
}
extension NotificationService.NotificationViewModel {
func createSubscribeQuery(
deviceToken: Data,
queryData: Mastodon.API.Subscriptions.QueryData,
mastodonAuthenticationBox: AuthenticationService.MastodonAuthenticationBox
) -> Mastodon.API.Subscriptions.CreateSubscriptionQuery {
let deviceToken = [UInt8](deviceToken).toHexString()
let appSecret = AppSecret.default
let endpoint = appSecret.notificationEndpoint + "/" + deviceToken
let p256dh = appSecret.notificationPublicKey.x963Representation
let auth = appSecret.notificationAuth
let query = Mastodon.API.Subscriptions.CreateSubscriptionQuery(
subscription: Mastodon.API.Subscriptions.QuerySubscription(
endpoint: endpoint,
keys: Mastodon.API.Subscriptions.QuerySubscription.Keys(
p256dh: p256dh,
auth: auth
)
),
data: queryData
)
return query
}
}