Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/TelegramCore/Sources/Settings/NetworkSettings.swift

@@ -0,0 +1,40 @@
+import Foundation
+import Postbox
+import SwiftSignalKit
+import MtProtoKit
+
+
+public func updateNetworkSettingsInteractively(postbox: Postbox, network: Network, _ f: @escaping (NetworkSettings) -> NetworkSettings) -> Signal<Void, NoError> {
+    return postbox.transaction { transaction -> Void in
+        updateNetworkSettingsInteractively(transaction: transaction, network: network, f)
+    }
+}
+
+extension NetworkSettings {
+    var mtNetworkSettings: MTNetworkSettings {
+        return MTNetworkSettings(reducedBackupDiscoveryTimeout: self.reducedBackupDiscoveryTimeout)
+    }
+}
+
+public func updateNetworkSettingsInteractively(transaction: Transaction, network: Network?, _ f: @escaping (NetworkSettings) -> NetworkSettings) {
+    var updateNetwork = false
+    var updatedSettings: NetworkSettings?
+    transaction.updatePreferencesEntry(key: PreferencesKeys.networkSettings, { current in
+        let previous = current?.get(NetworkSettings.self) ?? NetworkSettings.defaultSettings
+        let updated = f(previous)
+        updatedSettings = updated
+        if updated.reducedBackupDiscoveryTimeout != previous.reducedBackupDiscoveryTimeout {
+            updateNetwork = true
+        }
+        if updated.backupHostOverride != previous.backupHostOverride {
+            updateNetwork = true
+        }
+        return PreferencesEntry(updated)
+    })
+    
+    if let network = network, updateNetwork, let updatedSettings = updatedSettings {
+        network.context.updateApiEnvironment { current in
+            return current?.withUpdatedNetworkSettings(updatedSettings.mtNetworkSettings)
+        }
+    }
+}