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//
// NotificationManager.swift
// MullvadVPN
//
// Created by pronebird on 31/05/2021.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import Foundation
import MullvadLogging
import UserNotifications
final class NotificationManager: NotificationProviderDelegate {
private lazy var logger = Logger(label: "NotificationManager")
private var _notificationProviders: [NotificationProvider] = []
private var inAppNotificationDescriptors: [InAppNotificationDescriptor] = []
var notificationProviders: [NotificationProvider] {
get {
_notificationProviders
}
set(newNotificationProviders) {
dispatchPrecondition(condition: .onQueue(.main))
for oldNotificationProvider in _notificationProviders {
oldNotificationProvider.delegate = nil
}
for newNotificationProvider in newNotificationProviders {
newNotificationProvider.delegate = self
}
_notificationProviders = newNotificationProviders.sorted { $0.priority > $1.priority }
}
}
weak var delegate: NotificationManagerDelegate? {
didSet {
dispatchPrecondition(condition: .onQueue(.main))
// Pump in-app notifications when changing delegate.
if !inAppNotificationDescriptors.isEmpty {
delegate?.notificationManagerDidUpdateInAppNotifications(
self,
notifications: inAppNotificationDescriptors
)
}
}
}
nonisolated(unsafe) static let shared = NotificationManager()
private init() {}
func updateNotifications() {
dispatchPrecondition(condition: .onQueue(.main))
var newSystemNotificationRequests = [UNNotificationRequest]()
var newInAppNotificationDescriptors = [InAppNotificationDescriptor]()
var pendingRequestIdentifiersToRemove = [String]()
var deliveredRequestIdentifiersToRemove = [String]()
for notificationProvider in notificationProviders {
if let notificationProvider = notificationProvider as? SystemNotificationProvider {
if notificationProvider.shouldRemovePendingRequests {
pendingRequestIdentifiersToRemove.append(notificationProvider.identifier.domainIdentifier)
}
if notificationProvider.shouldRemoveDeliveredRequests {
deliveredRequestIdentifiersToRemove.append(notificationProvider.identifier.domainIdentifier)
}
if let request = notificationProvider.notificationRequest {
newSystemNotificationRequests.append(request)
}
}
if let notificationProvider = notificationProvider as? InAppNotificationProvider {
if let descriptor = notificationProvider.notificationDescriptor {
newInAppNotificationDescriptors.append(descriptor)
}
}
}
let notificationCenter = UNUserNotificationCenter.current()
notificationCenter.removePendingNotificationRequests(
withIdentifiers: pendingRequestIdentifiersToRemove
)
notificationCenter.removeDeliveredNotifications(
withIdentifiers: deliveredRequestIdentifiersToRemove
)
requestNotificationPermissions { granted in
guard granted else { return }
for newRequest in newSystemNotificationRequests {
notificationCenter.add(newRequest) { error in
guard let error else { return }
self.logger.error(
error: error,
message: "Failed to add notification request with identifier \(newRequest.identifier)."
)
}
}
}
inAppNotificationDescriptors = newInAppNotificationDescriptors
delegate?.notificationManagerDidUpdateInAppNotifications(
self,
notifications: newInAppNotificationDescriptors
)
}
func handleSystemNotificationResponse(_ response: UNNotificationResponse) {
dispatchPrecondition(condition: .onQueue(.main))
guard
let sourceProvider = notificationProviders.first(where: { notificationProvider in
guard let notificationProvider = notificationProvider as? SystemNotificationProvider else {
return false
}
return response.notification.request.identifier == notificationProvider.identifier.domainIdentifier
})
else {
logger.warning(
"Received response with request identifier: \(response.notification.request.identifier) that didn't map to any notification provider"
)
return
}
let notificationResponse = NotificationResponse(
providerIdentifier: sourceProvider.identifier,
actionIdentifier: response.actionIdentifier,
systemResponse: response
)
delegate?.notificationManager(self, didReceiveResponse: notificationResponse)
}
// MARK: - Private
private func requestNotificationPermissions(completion: @escaping (Bool) -> Void) {
let authorizationOptions: UNAuthorizationOptions = [.alert, .sound, .provisional]
let userNotificationCenter = UNUserNotificationCenter.current()
userNotificationCenter.getNotificationSettings { notificationSettings in
switch notificationSettings.authorizationStatus {
case .notDetermined:
userNotificationCenter.requestAuthorization(options: authorizationOptions) { granted, error in
if let error {
self.logger.error(
error: error,
message: "Failed to obtain user notifications authorization"
)
}
completion(granted)
}
case .authorized, .provisional:
completion(true)
case .denied, .ephemeral:
fallthrough
@unknown default:
completion(false)
}
}
}
// MARK: - NotificationProviderDelegate
func notificationProviderDidInvalidate(_ notificationProvider: NotificationProvider) {
dispatchPrecondition(condition: .onQueue(.main))
// Invalidate system notification
if let notificationProvider = notificationProvider as? SystemNotificationProvider {
let notificationCenter = UNUserNotificationCenter.current()
if notificationProvider.shouldRemovePendingRequests {
notificationCenter.removePendingNotificationRequests(withIdentifiers: [
notificationProvider.identifier.domainIdentifier
])
}
if notificationProvider.shouldRemoveDeliveredRequests {
notificationCenter.removeDeliveredNotifications(withIdentifiers: [
notificationProvider.identifier.domainIdentifier
])
}
if let request = notificationProvider.notificationRequest {
requestNotificationPermissions { granted in
guard granted else { return }
notificationCenter.add(request) { error in
if let error {
self.logger.error(
"""
Failed to add notification request with identifier \
\(request.identifier). Error: \(error.localizedDescription)
"""
)
}
}
}
}
}
invalidateInAppNotification(notificationProvider)
}
private func invalidateInAppNotification(_ notificationProvider: NotificationProvider) {
if let notificationProvider = notificationProvider as? InAppNotificationProvider {
var newNotificationDescriptors = inAppNotificationDescriptors
if let replaceNotificationDescriptor = notificationProvider.notificationDescriptor {
newNotificationDescriptors =
notificationProviders
.compactMap { notificationProvider -> InAppNotificationDescriptor? in
if replaceNotificationDescriptor.identifier == notificationProvider.identifier {
return replaceNotificationDescriptor
} else {
return inAppNotificationDescriptors.first { descriptor in
descriptor.identifier == notificationProvider.identifier
}
}
}
} else {
newNotificationDescriptors.removeAll { descriptor in
descriptor.identifier == notificationProvider.identifier
}
}
inAppNotificationDescriptors = newNotificationDescriptors
delegate?.notificationManagerDidUpdateInAppNotifications(
self,
notifications: inAppNotificationDescriptors
)
}
}
func notificationProvider(_ notificationProvider: NotificationProvider, didReceiveAction actionIdentifier: String) {
dispatchPrecondition(condition: .onQueue(.main))
let notificationResponse = NotificationResponse(
providerIdentifier: notificationProvider.identifier,
actionIdentifier: actionIdentifier
)
delegate?.notificationManager(self, didReceiveResponse: notificationResponse)
}
}
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