Add boot detection in the NSE and use this to inform the user that there may be more notifications. (#5054)

* Add an initial implementation of the receivedWhileOfflineNotification. * Only deliver a single receivedWhileOffline notification per boot and clarify the API. * Add a 15-minute threshold for the receiveWhileOfflineNotification.
2026-11-04 01:20:12 +00:00 · 2026-02-06 15:18:09 +00:00
parent bff328554a
commit 7532a792b7
11 changed files with 157 additions and 21 deletions
@@ -0,0 +1,48 @@
+//
+// Copyright 2025 Element Creations Ltd.
+// Copyright 2022-2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Foundation
+
+enum BootDetectionManager {
+    /// Detects after reboot, before unlocked state. Does this by trying to write a file to the filesystem (to the Caches directory) and read it back.
+    /// - Parameter containerURL: Container url to write the file.
+    /// - Returns: true if the state detected
+    static func isDeviceLockedAfterReboot(containerURL: URL) -> Bool {
+        let dummyString = ProcessInfo.processInfo.globallyUniqueString
+        guard let dummyData = dummyString.data(using: .utf8) else {
+            return true
+        }
+
+        do {
+            //  add a unique filename
+            let url = containerURL.appendingPathComponent(ProcessInfo.processInfo.globallyUniqueString)
+
+            try dummyData.write(to: url, options: .completeFileProtectionUntilFirstUserAuthentication)
+            let readData = try Data(contentsOf: url)
+            let readString = String(data: readData, encoding: .utf8)
+            try FileManager.default.removeItem(at: url)
+            if readString != dummyString {
+                return true
+            }
+        } catch {
+            return true
+        }
+        return false
+    }
+    
+    /// The time that the system was booted, as a Unix timestamp.
+    static func systemBootTime() -> TimeInterval? {
+        var bootTime = timeval()
+        var size = MemoryLayout<timeval>.size
+        var managementInformationBase: [Int32] = [CTL_KERN, KERN_BOOTTIME]
+        
+        guard sysctl(&managementInformationBase, 2, &bootTime, &size, nil, 0) == 0 else { return nil }
+        
+        return TimeInterval(bootTime.tv_sec) + TimeInterval(bootTime.tv_usec) / 1_000_000
+    }
+}