[WIP] Stories

submodules/Utils/VolumeButtons/Sources/VolumeButtons.swift

@@ -0,0 +1,41 @@
+import Foundation
+import UIKit
+import SwiftSignalKit
+import MediaPlayer
+
+import LegacyComponents
+
+public class VolumeButtonsListener: NSObject {
+    private let handler: PGCameraVolumeButtonHandler
+    
+    private var disposable: Disposable?
+    
+    public init(shouldBeActive: Signal<Bool, NoError>, valueChanged: @escaping () -> Void) {
+        var impl: (() -> Void)?
+        
+        self.handler = PGCameraVolumeButtonHandler(upButtonPressedBlock: {
+            impl?()
+        }, upButtonReleasedBlock: {}, downButtonPressedBlock: {
+            impl?()
+        }, downButtonReleasedBlock: {})
+        
+        super.init()
+        
+        impl = {
+            valueChanged()
+        }
+        
+        self.disposable = (shouldBeActive
+        |> deliverOnMainQueue).start(next: { [weak self] value in
+            guard let strongSelf = self else {
+                return
+            }
+            strongSelf.handler.enabled = value
+        })
+    }
+    
+    deinit {
+        self.handler.enabled = false
+        self.disposable?.dispose()
+    }
+}