Support route availability control in Navigator

[pogadaikowork-max]

Proposal to add functionality to set which routes are currently available for navigation. For example, when force updating the application, so that using the navigator you can only go to certain screens or, for example, to prohibit navigation in the application until it is updated

[hmlongco]

If you're discussing "routes" for deep linking, then you can simply do whatever you need to do in the route handler.

public struct RootSplitViewRouter: NavigationRouteHandling {
    @MainActor public func route(to route: KnownRoutes, with navigator: Navigator) {
         // do whatever
    }
}

If not... then probably not. Navigating to a destination is often the last step, performed after you've done processing, analytics, and so on. Refusing to navigate after that point breaks the system.

Plus there are also times like when using navigstionLink(to:), where SwiftUI WILL be going somewhere. You can't stop it.

If you need to force updates, put up a cover that forces updates.

Or, perhaps, use navigationMap to push or present a different screen.