DocumentPreview wrapping UIDocumentInteractionController

DocumentPreview

struct DocumentPreview: UIViewControllerRepresentable {
    
    final class Coordintor: NSObject, UIDocumentInteractionControllerDelegate {
    
        private let parent: DocumentPreview
        
        init(_ parent: DocumentPreview) {
            self.parent = parent
        }
        
        func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
            parent.viewController
        }

        func documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController) {
            controller.delegate = nil
            parent.isActive.wrappedValue = false
        }

        public final func documentInteractionControllerDidDismissOpenInMenu(_ controller: UIDocumentInteractionController) {
            controller.delegate = nil
            parent.isActive.wrappedValue = false
        }

        public final func documentInteractionController(
            _ controller: UIDocumentInteractionController,
            didEndSendingToApplication _: String?
        ) {
            controller.delegate = nil
            parent.isActive.wrappedValue = false
        }
    }
    
    private static var documentInteractionController: UIDocumentInteractionController?
    private let viewController = UIViewController()
    private let isActive: Binding<Bool>

    init(isActive: Binding<Bool>, url: URL) {
        self.isActive = isActive
        Self.documentInteractionController = UIDocumentInteractionController(url: url)
    }

    func makeUIViewController(context: UIViewControllerRepresentableContext<DocumentPreview>) -> UIViewController {
        viewController
    }

    func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<DocumentPreview>) {
        guard isActive.wrappedValue && Self.documentInteractionController?.delegate == nil else { return }
        Self.documentInteractionController?.delegate = context.coordinator
        Self.documentInteractionController?.presentOptionsMenu(from: viewController.view.bounds, in: viewController.view, animated: true)
    }

    func makeCoordinator() -> Coordintor {
        Coordintor(self)
    }
}

extension View {
    func documentPreview(isActive: Binding<Bool>, url: URL) -> some View {
        background(DocumentPreview(isActive: isActive, url: url))
    }
}