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@@ -9,125 +9,35 @@ import CryptoKit
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/// select Debug -> Attach to Process by PID or Name, and select the extension. Don't forget to set a breakpoint, or you're not gonna have a good time.
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class NotificationService: UNNotificationServiceExtension {
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private let tag = "NotificationService"
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- private let actionsCategory = "ntfyActions" // It seems ok to re-use the same category
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+ private var store: Store?
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var contentHandler: ((UNNotificationContent) -> Void)?
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var bestAttemptContent: UNMutableNotificationContent?
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override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
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+ self.store = Store.shared
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self.contentHandler = contentHandler
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self.bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
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Log.d(tag, "Notification received (in service)") // Logs from extensions are not printed in Xcode!
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if let bestAttemptContent = bestAttemptContent {
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- let store = Store.shared
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let userInfo = bestAttemptContent.userInfo
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let baseUrl = userInfo["base_url"] as? String ?? Config.appBaseUrl
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- let topic = userInfo["topic"] as? String ?? ""
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guard let message = Message.from(userInfo: userInfo) else {
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- Log.w(Store.tag, "Message cannot be parsed from userInfo", userInfo)
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+ Log.w(tag, "Message cannot be parsed from userInfo", userInfo)
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contentHandler(request.content)
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return
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}
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- if message.event == "poll_request" {
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- let subscription = store.getSubscriptions()?.first { $0.urlHash() == topic }
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- guard let subscription = subscription, let pollId = message.pollId else {
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- Log.w(tag, "Cannot find subscription", message)
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- contentHandler(request.content)
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- return
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- }
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- //let semaphore = DispatchSemaphore(value: 0)
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- ApiService.shared.poll(subscription: subscription, messageId: pollId) { message, error in
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- guard let message = message else {
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- Log.w(self.tag, "Error fetching message", error)
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- contentHandler(request.content)
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- return
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- }
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- bestAttemptContent.title = message.title ?? subscription.urlString()
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- bestAttemptContent.body = message.message ?? ""
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- contentHandler(bestAttemptContent)
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- //semaphore.signal()
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- }
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- //semaphore.wait(timeout: .distantFuture)
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- Thread.sleep(forTimeInterval: 5)
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- return
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- }
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-
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- if message.event != "message" {
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+ switch message.event {
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+ case "poll_request":
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+ handlePollRequest(request, bestAttemptContent, message, contentHandler)
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+ case "message":
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+ handleMessage(request, bestAttemptContent, baseUrl, message, contentHandler)
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+ default:
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Log.w(tag, "Irrelevant message received", message)
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contentHandler(request.content)
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- return
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- }
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-
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- // Only handle "message" events
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- guard let subscription = store.getSubscription(baseUrl: baseUrl, topic: topic) else {
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- Log.w(tag, "Subscription for topic \(topic) unknown")
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- contentHandler(request.content)
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- return
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- }
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-
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- // Set notification title to short URL if there is no title. The title is always set
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- // by the server, but it may be empty.
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- if let title = message.title, title == "" {
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- bestAttemptContent.title = topicShortUrl(baseUrl: baseUrl, topic: topic)
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- }
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-
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- // Emojify title or message
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- let emojiTags = parseEmojiTags(message.tags)
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- if !emojiTags.isEmpty {
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- if let title = message.title, title != "" {
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- bestAttemptContent.title = emojiTags.joined(separator: "") + " " + bestAttemptContent.title
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- } else {
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- bestAttemptContent.body = emojiTags.joined(separator: "") + " " + bestAttemptContent.body
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- }
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- }
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-
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- // Add custom actions
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- //
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- // We re-define the categories every time here, which is weird, but it works. When tapped, the action sets the
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- // actionIdentifier in the application(didReceive) callback. This logic is handled in the AppDelegate. This approach
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- // is described in a comment in https://stackoverflow.com/questions/30103867/changing-action-titles-in-interactive-notifications-at-run-time#comment122812568_30107065
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- //
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- // We also must set the .foreground flag, which brings the notification to the foreground and avoids an error about
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- // permissions. This is described in https://stackoverflow.com/a/44580916/1440785
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- if let actions = message.actions, !actions.isEmpty {
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- bestAttemptContent.categoryIdentifier = actionsCategory
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-
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- let center = UNUserNotificationCenter.current()
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- let notificationActions = actions.map { UNNotificationAction(identifier: $0.id, title: $0.label, options: [.foreground]) }
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- let category = UNNotificationCategory(identifier: actionsCategory, actions: notificationActions, intentIdentifiers: [])
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- center.setNotificationCategories([category])
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}
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-
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- // Play a sound, and group by topic
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- bestAttemptContent.sound = .default
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- bestAttemptContent.threadIdentifier = topic
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-
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- // Map priorities to interruption level (light up screen, ...) and relevance (order)
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- if #available(iOS 15.0, *) {
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- switch message.priority {
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- case 1:
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- bestAttemptContent.interruptionLevel = .passive
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- bestAttemptContent.relevanceScore = 0
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- case 2:
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- bestAttemptContent.interruptionLevel = .passive
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- bestAttemptContent.relevanceScore = 0.25
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- case 4:
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- bestAttemptContent.interruptionLevel = .timeSensitive
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- bestAttemptContent.relevanceScore = 0.75
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- case 5:
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- bestAttemptContent.interruptionLevel = .critical
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- bestAttemptContent.relevanceScore = 1
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- default:
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- bestAttemptContent.interruptionLevel = .active
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- bestAttemptContent.relevanceScore = 0.5
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- }
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- }
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-
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- // Save notification to store, and display it
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- Store.shared.save(notificationFromMessage: message, withSubscription: subscription)
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- contentHandler(bestAttemptContent)
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}
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}
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@@ -141,11 +51,49 @@ class NotificationService: UNNotificationServiceExtension {
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}
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}
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- func handleMessage() {
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+ private func handleMessage(_ request: UNNotificationRequest, _ content: UNMutableNotificationContent, _ baseUrl: String, _ message: Message, _ contentHandler: @escaping (UNNotificationContent) -> Void) {
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+ // Modify notification based on message
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+ content.modify(message: message, baseUrl: baseUrl)
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+ // Save notification to store, and display it
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+ guard let subscription = store?.getSubscription(baseUrl: baseUrl, topic: message.topic) else {
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+ Log.w(tag, "Subscription \(topicUrl(baseUrl: baseUrl, topic: message.topic)) unknown")
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+ contentHandler(request.content)
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+ return
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+ }
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+ Store.shared.save(notificationFromMessage: message, withSubscription: subscription)
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+ contentHandler(content)
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}
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- func handlePollRequest() {
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+ private func handlePollRequest(_ request: UNNotificationRequest, _ content: UNMutableNotificationContent, _ pollRequest: Message, _ contentHandler: @escaping (UNNotificationContent) -> Void) {
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+ let subscription = store?.getSubscriptions()?.first { $0.urlHash() == pollRequest.topic }
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+ let baseUrl = subscription?.baseUrl
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+ guard
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+ let subscription = subscription,
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+ let pollId = pollRequest.pollId,
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+ let baseUrl = baseUrl
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+ else {
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+ Log.w(tag, "Cannot find subscription", pollRequest)
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+ contentHandler(request.content)
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+ return
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+ }
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+
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+ // Poll original server
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+ let semaphore = DispatchSemaphore(value: 0)
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+ ApiService.shared.poll(subscription: subscription, messageId: pollId) { message, error in
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+ guard let message = message else {
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+ Log.w(self.tag, "Error fetching message", error)
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+ contentHandler(request.content)
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+ return
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+ }
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+ self.handleMessage(request, content, baseUrl, message, contentHandler)
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+ semaphore.signal()
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+ }
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+
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+ // Note: If notifications only show up as "New message", it may be because the "return" statement
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+ // happens before the contentHandler() is called. We add this semaphore here to synchronize the threads.
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+ // I don't know if this is necessary, but it feels like the right thing to do.
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+ _ = semaphore.wait(timeout: DispatchTime.now() + 25) // 30 seconds is the max for the entire extension
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}
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}
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Philipp Heckel