Neues Icon, parallele Downloads

ABS Client/Audiobookshelf swift/Services/NotificationManager.swift

@@ -0,0 +1,42 @@
+import Foundation
+import UserNotifications
+#if canImport(UIKit)
+import UIKit
+#endif
+
+/// Manages local UNUserNotificationCenter notifications for download events.
+@MainActor
+final class NotificationManager {
+    static let shared = NotificationManager()
+    private init() {}
+
+    /// Requests notification authorization the first time the app launches.
+    /// Skips the system prompt if permission has already been granted or denied.
+    func requestPermissionIfNeeded() async {
+        let center = UNUserNotificationCenter.current()
+        let settings = await center.notificationSettings()
+        guard settings.authorizationStatus == .notDetermined else { return }
+        _ = try? await center.requestAuthorization(options: [.alert, .sound])
+    }
+
+    /// Fires a local notification when a download fails.
+    /// Suppressed while the app is in the foreground — an in-app alert already
+    /// surfaces the error there, so a notification would be redundant.
+    func sendDownloadFailedNotification(itemTitle: String) async {
+        #if canImport(UIKit)
+        guard UIApplication.shared.applicationState != .active else { return }
+        #endif
+
+        let content = UNMutableNotificationContent()
+        content.title = "Download fehlgeschlagen"
+        content.body = "„\(itemTitle)" konnte nicht heruntergeladen werden."
+        content.sound = .default
+
+        let request = UNNotificationRequest(
+            identifier: "download-failed-\(UUID().uuidString)",
+            content: content,
+            trigger: nil  // deliver immediately
+        )
+        try? await UNUserNotificationCenter.current().add(request)
+    }
+}