Open the directory housing a document in the Files app

URL+OpenInFilesApp.swift

// thanks to this thing!
// https://www.macstories.net/ios/fs-bookmarks-a-shortcut-to-reopen-files-and-folders-directly-in-the-files-app/

extension URL {
    func openParentDirectoryInFilesApp() {
        guard var components = URLComponents(url: self.deletingLastPathComponent(), resolvingAgainstBaseURL: false) else { return }

        components.scheme = "shareddocuments"

        guard let newURL = components.url else { return }

        if UIApplication.shared.canOpenURL(newURL) {
            UIApplication.shared.open(newURL)
        }
    }
}