Add iOS option to lock portrait mode in browsing

iOS/AppDelegate.swift

@@ -0,0 +1,17 @@
+import Foundation
+import UIKit
+
+final class AppDelegate: UIResponder, UIApplicationDelegate {
+    var orientationLock = UIInterfaceOrientationMask.all
+
+    private(set) static var instance: AppDelegate!
+
+    func application(_: UIApplication, supportedInterfaceOrientationsFor _: UIWindow?) -> UIInterfaceOrientationMask {
+        orientationLock
+    }
+
+    func application(_: UIApplication, didFinishLaunchingWithOptions _: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool { // swiftlint:disable:this discouraged_optional_collection
+        AppDelegate.instance = self
+        return true
+    }
+}

iOS/Orientation.swift

@@ -0,0 +1,31 @@
+import CoreMotion
+import Defaults
+import Logging
+import UIKit
+
+struct Orientation {
+    static var logger = Logger(label: "stream.yattee.orientation")
+
+    static func lockOrientation(_ orientation: UIInterfaceOrientationMask) {
+        if let delegate = AppDelegate.instance {
+            delegate.orientationLock = orientation
+
+            let orientationString = orientation == .portrait ? "portrait" : orientation == .landscapeLeft ? "landscapeLeft" :
+                orientation == .landscapeRight ? "landscapeRight" : orientation == .portraitUpsideDown ? "portraitUpsideDown" :
+                orientation == .landscape ? "landscape" : orientation == .all ? "all" : "allButUpsideDown"
+
+            logger.info("locking \(orientationString)")
+        }
+    }
+
+    static func lockOrientation(_ orientation: UIInterfaceOrientationMask, andRotateTo rotateOrientation: UIInterfaceOrientation? = nil) {
+        lockOrientation(orientation)
+
+        guard !rotateOrientation.isNil else {
+            return
+        }
+
+        UIDevice.current.setValue(rotateOrientation!.rawValue, forKey: "orientation")
+        UINavigationController.attemptRotationToDeviceOrientation()
+    }
+}