crypto: Add configuration flag to enable invisible crypto (#3247)

NSE/Sources/NotificationServiceExtension.swift

@@ -32,7 +32,7 @@ import UserNotifications
 // We keep a global `environment` singleton to ensure that our app context,
 // database, logging, etc. are only ever setup once per *process*
 
-private let settings: NSESettingsProtocol = AppSettings()
+private let settings: CommonSettingsProtocol = AppSettings()
 private let notificationContentBuilder = NotificationContentBuilder(messageEventStringBuilder: RoomMessageEventStringBuilder(attributedStringBuilder: AttributedStringBuilder(mentionBuilder: PlainMentionBuilder()), prefix: .none))
 private let keychainController = KeychainController(service: .sessions,
                                                     accessGroup: InfoPlistReader.main.keychainAccessGroupIdentifier)
@@ -81,7 +81,8 @@ class NotificationServiceExtension: UNNotificationServiceExtension {
                     do {
                         Self.userSession = try await NSEUserSession(credentials: credentials,
                                                                     clientSessionDelegate: keychainController,
-                                                                    appHooks: appHooks)
+                                                                    appHooks: appHooks,
+                                                                    appSettings: settings)
                     } catch {
                         MXLog.error("Failed creating user session with error: \(error)")
                     }

NSE/Sources/Other/NSESettingsProtocol.swift

@@ -1,14 +0,0 @@
-//
-// Copyright 2023, 2024 New Vector Ltd.
-//
-// SPDX-License-Identifier: AGPL-3.0-only
-// Please see LICENSE in the repository root for full details.
-//
-
-import Foundation
-
-protocol NSESettingsProtocol {
-    var logLevel: TracingConfiguration.LogLevel { get }
-}
-
-extension AppSettings: NSESettingsProtocol { }

NSE/Sources/Other/NSEUserSession.swift

@@ -19,7 +19,7 @@ final class NSEUserSession {
                                                                                networkMonitor: nil)
     private let delegateHandle: TaskHandle?
 
-    init(credentials: KeychainCredentials, clientSessionDelegate: ClientSessionDelegate, appHooks: AppHooks) async throws {
+    init(credentials: KeychainCredentials, clientSessionDelegate: ClientSessionDelegate, appHooks: AppHooks, appSettings: CommonSettingsProtocol) async throws {
         sessionDirectories = credentials.restorationToken.sessionDirectories
         
         userID = credentials.userID
@@ -33,7 +33,8 @@ final class NSEUserSession {
                          httpProxy: URL(string: homeserverURL)?.globalProxy,
                          slidingSync: .restored,
                          sessionDelegate: clientSessionDelegate,
-                         appHooks: appHooks)
+                         appHooks: appHooks,
+                         invisibleCryptoEnabled: appSettings.invisibleCryptoEnabled)
             .sessionPaths(dataPath: credentials.restorationToken.sessionDirectories.dataPath,
                           cachePath: credentials.restorationToken.sessionDirectories.cachePath)
             .username(username: credentials.userID)