feat: new reachability for multibackend - WPB-20050

WireNetwork/Sources/WireNetwork/Network/NetworkStack/NetworkReachability.swift

@@ -0,0 +1,44 @@
+//
+// Wire
+// Copyright (C) 2025 Wire Swiss GmbH
+//
+// This program 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
+// (at your option) any later version.
+//
+// This program 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 this program. If not, see http://www.gnu.org/licenses/.
+//
+
+@preconcurrency import Combine
+import Foundation
+import Network
+
+public final class NetworkReachability: Sendable {
+
+    private let monitor = NWPathMonitor()
+    private let isReachableSubject = CurrentValueSubject<Bool, Never>(true)
+    private let queue = DispatchQueue(label: "NetworkReachabilityQueue")
+
+    public var isReachablePublisher: AnyPublisher<Bool, Never> {
+        isReachableSubject.eraseToAnyPublisher()
+    }
+
+    public init() {
+        monitor.pathUpdateHandler = { [weak self] path in
+            self?.isReachableSubject.send(path.status == .satisfied)
+        }
+        monitor.start(queue: queue)
+    }
+
+    deinit {
+        monitor.cancel()
+    }
+
+}

wire-ios-sync-engine/Source/UserSession/ZMUserSession/ZMUserSession.swift

@@ -404,6 +404,9 @@ public final class ZMUserSession: NSObject {
     private let userSessionComponent: UserSessionComponent
     public private(set) var clientSessionComponent: ClientSessionComponent?
 
+    private let networkReachability = NetworkReachability()
+    private var isNetworkReachableCancellable: AnyCancellable?
+
     // MARK: - Initialize
 
     init(
@@ -489,6 +492,12 @@ public final class ZMUserSession: NSObject {
 
         super.init()
 
+        if DeveloperFlag.multibackend.isOn {
+            self.isNetworkReachableCancellable = networkReachability.isReachablePublisher
+                .sink { [weak self] isReachable in
+                    isReachable ? self?.didReceiveData() : self?.didGoOffline()
+                }
+        }
     }
 
     func trackAppOpenAnalyticEventWhenAppBecomesActive() {
@@ -698,7 +707,10 @@ public final class ZMUserSession: NSObject {
 
     private func configureTransportSession() {
         transportSession.pushChannel.clientID = selfUserClient?.remoteIdentifier
-        transportSession.setNetworkStateDelegate(self)
+        // When multibackend is on. we use another reachability.
+        if !DeveloperFlag.multibackend.isOn {
+            transportSession.setNetworkStateDelegate(self)
+        }
         transportSession.setAccessTokenRenewalFailureHandler { [weak self] response in
             self?.transportSessionAccessTokenDidFail(response: response)
         }

wire-ios/Wire-iOS Share Extension/Generated/Strings+Generated.swift

@@ -49,8 +49,8 @@ internal enum L10n {
       internal enum UpdateRequired {
         /// Your Wire server needs to be updated. Please notify your system administrator.
         internal static let obsoleteBackend = L10n.tr("Localizable", "share_extension.error.update_required.obsolete_backend", fallback: "Your Wire server needs to be updated. Please notify your system administrator.")
-        /// You are missing out on new features. Get the latest version of  Wire to continue using the app with this account.
-        internal static let obsoleteClient = L10n.tr("Localizable", "share_extension.error.update_required.obsolete_client", fallback: "You are missing out on new features. Get the latest version of  Wire to continue using the app with this account.")
+        /// You are missing out on new features. Get the latest version of Wire to continue using the app with this account.
+        internal static let obsoleteClient = L10n.tr("Localizable", "share_extension.error.update_required.obsolete_client", fallback: "You are missing out on new features. Get the latest version of Wire to continue using the app with this account.")
         /// Update required
         internal static let title = L10n.tr("Localizable", "share_extension.error.update_required.title", fallback: "Update required")
       }