[WIP] Use view controller navigation for alert

Flipper/Packages/UI/Sources/InAppNotifications/Overlay/OverlayController.swift

@@ -1,59 +1,26 @@
 import SwiftUI
 
 class OverlayController: ObservableObject {
-    private var overlay: UIWindow?
-    private var views: [UIView]
+    var rootVC: UIViewController?
 
-    init() {
-        self.overlay = OverlayWindow()
-        self.views = []
-    }
-
-    func present<Content: View>(
+    @MainActor func present<Content: View>(
         @ViewBuilder content: @escaping () -> Content
     ) {
-        guard let overlay else { return }
-
-        let viewController = UIHostingController(
-            rootView: content()
-                .environmentObject(self)
-        )
+        let viewController = UIHostingController(rootView: content())
         viewController.view.backgroundColor = .clear
+        viewController.modalTransitionStyle = .crossDissolve
+        viewController.modalPresentationStyle = .overCurrentContext
 
-        views.append(viewController.view)
+        self.rootVC = UIApplication
+            .shared
+            .connectedScenes
+            .flatMap { ($0 as? UIWindowScene)?.windows ?? [] }
+            .first(where: { $0.isKeyWindow })?.rootViewController
 
-        if let rootViewController = overlay.rootViewController {
-            viewController.view.frame = rootViewController.view.frame
-        } else {
-            overlay.rootViewController = viewController
-            overlay.isUserInteractionEnabled = true
-            overlay.isHidden = false
-        }
+        rootVC?.present(viewController, animated: true)
     }
 
-    func dismiss() {
-        guard let overlay else { return }
-
-        guard !views.isEmpty else {
-            return
-        }
-
-        views.removeFirst()
-
-        if let first = views.first {
-            guard
-                let rootViewController = overlay.rootViewController
-            else {
-                return
-            }
-            rootViewController.view.subviews.forEach { view in
-                view.removeFromSuperview()
-            }
-            rootViewController.view.addSubview(first)
-        } else {
-            overlay.isHidden = true
-            overlay.isUserInteractionEnabled = false
-            overlay.rootViewController = nil
-        }
+    @MainActor func dismiss() {
+        rootVC?.dismiss(animated: false)
     }
 }

Flipper/Packages/UI/Sources/InAppNotifications/Overlay/OverlayModifier.swift

@@ -6,21 +6,13 @@ struct OverlayModifier<OverlayContent: View>: ViewModifier {
 
     @EnvironmentObject private var controller: OverlayController
 
-    init(
-        isPresented: Binding<Bool>,
-        @ViewBuilder overlayContent: @escaping () -> OverlayContent
-    ) {
-        self.isPresented = isPresented
-        self.overlayContent = overlayContent
-    }
-
     func body(content: Content) -> some View {
         content
-            // NOTE: can't use controller.dismiss here as the isPresented
-            // change doesn't fire when containing view was dismissed
             .onChange(of: isPresented.wrappedValue) { newValue in
                 if newValue {
                     controller.present(content: overlayContent)
+                } else {
+                    controller.dismiss()
                 }
             }
     }

Flipper/Packages/UI/Sources/InAppNotifications/Views/AlertView.swift

@@ -5,9 +5,6 @@ struct AlertView<Content: View>: View {
     let content: Content
 
     @State private var isPresentedAnimated: Bool = false
-
-    @EnvironmentObject private var controller: OverlayController
-
     var animationDuration: Double { 0.1 }
 
     var body: some View {
@@ -62,7 +59,6 @@ struct AlertView<Content: View>: View {
                 isPresentedAnimated = false
             }
             try? await Task.sleep(seconds: animationDuration)
-            controller.dismiss()
         }
     }
 }

Flipper/Packages/UI/Sources/InAppNotifications/Views/NotificationView.swift

@@ -6,8 +6,6 @@ struct NotificationView<Content: View>: View {
 
     @State private var isPresentedAnimated: Bool = false
 
-    @EnvironmentObject var controller: OverlayController
-
     var animationDuration: Double { 0.1 }
     var presentingDuration: Double { 3.0 }
 
@@ -42,7 +40,6 @@ struct NotificationView<Content: View>: View {
                 isPresentedAnimated = false
             }
             try? await Task.sleep(seconds: animationDuration)
-            controller.dismiss()
         }
     }
 }

Flipper/Packages/UI/Sources/InAppNotifications/Views/PopupView.swift

@@ -6,8 +6,6 @@ struct PopupView<Content: View>: View {
 
     @State private var isPresentedAnimated: Bool = false
 
-    @EnvironmentObject var controller: OverlayController
-
     var animationDuration: Double { 0.1 }
 
     var body: some View {
@@ -43,7 +41,6 @@ struct PopupView<Content: View>: View {
                 isPresentedAnimated = false
             }
             try? await Task.sleep(seconds: animationDuration)
-            controller.dismiss()
         }
     }
 }