Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/TelegramUIPreferences/Sources/ExperimentalSettings.swift

@@ -0,0 +1,36 @@
+import Foundation
+import TelegramCore
+import SwiftSignalKit
+
+public struct ExperimentalSettings: Codable, Equatable {
+    public static var defaultSettings: ExperimentalSettings {
+        return ExperimentalSettings()
+    }
+    
+    public init() {
+    }
+    
+    public init(from decoder: Decoder) throws {
+    }
+    
+    public func encode(to encoder: Encoder) throws {
+    }
+    
+    public static func ==(lhs: ExperimentalSettings, rhs: ExperimentalSettings) -> Bool {
+        return true
+    }
+}
+
+public func updateExperimentalSettingsInteractively(accountManager: AccountManager<TelegramAccountManagerTypes>, _ f: @escaping (ExperimentalSettings) -> ExperimentalSettings) -> Signal<Void, NoError> {
+    return accountManager.transaction { transaction -> Void in
+        transaction.updateSharedData(ApplicationSpecificSharedDataKeys.experimentalSettings, { entry in
+            let currentSettings: ExperimentalSettings
+            if let entry = entry?.get(ExperimentalSettings.self) {
+                currentSettings = entry
+            } else {
+                currentSettings = ExperimentalSettings.defaultSettings
+            }
+            return SharedPreferencesEntry(f(currentSettings))
+        })
+    }
+}