Use instant updates

App/App_iOS.swift

@@ -103,14 +103,6 @@ struct Kiwix: App {
                     }
                 }
                 .modifier(DonationViewModifier())
-                .onReceive(
-                    NotificationCenter.default.publisher(
-                        for: UIApplication.didEnterBackgroundNotification
-                    )
-                ) { _ in
-                    appDelegate.reScheduleBackgroundDownloadTask()
-                }
-                
         }
         .commands {
             CommandGroup(replacing: .undoRedo) {
@@ -131,57 +123,6 @@ struct Kiwix: App {
             DownloadService.shared.backgroundCompletionHandler = completionHandler
         }
 
-        func application(
-            _ application: UIApplication,
-            didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil
-        ) -> Bool {
-            registerBackgroundTask()
-            return true
-        }
-        
-        // Background download task
-        func registerBackgroundTask() {
-            guard case .kiwix = AppType.current else { return }
-            let isRegistered = BGTaskScheduler.shared.register(
-                forTaskWithIdentifier: BackgroundDownloads.identifier,
-                using: .main) { [self] task in
-                    // update the live activities, if any
-                    ActivityService.shared().start()
-                    // reschedule
-                    reScheduleBackgroundDownloadTask()
-                    task.setTaskCompleted(success: true)
-                }
-            if isRegistered {
-                os_log("BackgroundDownloads registered", log: Log.DownloadService, type: .debug)
-            } else {
-                os_log("BackgroundDownloads registering failed: %s", log: Log.DownloadService, type: .error)
-            }
-        }
-        
-        func reScheduleBackgroundDownloadTask() {
-            guard case .kiwix = AppType.current else { return }
-            do {
-                let date = BackgroundDownloads.nextDate()
-                let request = BGAppRefreshTaskRequest(identifier: BackgroundDownloads.identifier)
-                request.earliestBeginDate = date
-                os_log(
-                    "BackgroundDownloads task re-scheduled for: %s",
-                    log: Log.DownloadService,
-                    type: .debug,
-                    date.formatted()
-                )
-                
-                try BGTaskScheduler.shared.submit(request)
-            } catch {
-                os_log(
-                    "BackgroundDownloads re-schedule failed: %s",
-                    log: Log.DownloadService,
-                    type: .error,
-                    error.localizedDescription
-                )
-            }
-        }
-
         /// Handling file download complete notification
         func userNotificationCenter(_ center: UNUserNotificationCenter,
                                     didReceive response: UNNotificationResponse,

Model/Downloads/BackgroundDownloads.swift

@@ -1,28 +0,0 @@
-// This file is part of Kiwix for iOS & macOS.
-//
-// Kiwix is free software; you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 3 of the License, or
-// any later version.
-//
-// Kiwix is distributed in the hope that it will be useful, but
-// WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Kiwix; If not, see https://www.gnu.org/licenses/.
-
-#if os(iOS)
-import Foundation
-import BackgroundTasks
-
-enum BackgroundDownloads {
-    static let identifier = "org.kiwix.downloads_to_liveactivity"
-    
-    static func nextDate() -> Date {
-        .now + 2 // after 2 seconds
-    }
-}
-
-#endif

Views/LiveActivity/ActivityService.swift

@@ -111,17 +111,7 @@ final class ActivityService {
             start(with: state, downloadTimes: downloadTimes)
             return
         }
-        let now = CACurrentMediaTime()
+        guard let activity else { return }
-        // make sure we don't update too frequently
-        // unless there's a pause, we do want immediate update
-        let isTooEarlyToUpdate = if hasAnyPause(in: state) {
-            false
-        } else {
-            (now - lastUpdate) <= updateFrequency
-        }
-        guard let activity, !isTooEarlyToUpdate else {
-            return
-        }
         Task {
             let activityState = await activityState(from: state, downloadTimes: downloadTimes)
             let newContent = ActivityContent<DownloadActivityAttributes.ContentState>(
@@ -136,7 +126,6 @@ final class ActivityService {
                 await activity.update(newContent)
             }
         }
-        lastUpdate = now
     }
     
     private func updatedDownloadTimes(from states: [UUID: DownloadState]) -> [UUID: CFTimeInterval] {

Widgets/DownloadsLiveActivity.swift

@@ -108,26 +108,21 @@ struct DownloadsLiveActivity: Widget {
         state: DownloadActivityAttributes.ContentState
     ) -> some View {
         let timeInterval = currentTimeInterval(state: state)
-        if !state.isAllPaused {
-            ProgressView(timerInterval: timeInterval, countsDown: false, label: {
-                progressText(state.progressDescription)
-            }, currentValueLabel: {
-                Text(timerInterval: timeInterval)
-                    .font(.caption)
-                    .tint(.secondary)
-            })
-            .tint(Color.primary)
-        } else {
         ProgressView(value: state.progress, label: {
             progressText(state.progressDescription)
         }, currentValueLabel: {
+            if !state.isAllPaused {
+                Text(timerInterval: timeInterval)
+                    .font(.caption)
+                    .tint(.secondary)
+            } else {
                 Label("", systemImage: "pause.fill")
                     .font(.caption)
                     .tint(.secondary)
+            }
         })
         .tint(Color.primary)
     }
-    }
 }
 
 extension DownloadActivityAttributes {