private async void CWebView_Navigated(object sender, WebNavigatedEventArgs e)
        {
            // This regex checks if the url is a book and gets the id
            Match regex = new Regex(@"(\d+)[-b]*.epub").Match(e.Url);

            if (regex.Success)
            {
                string            id    = regex.Groups[1].Value;
                CBook             book  = CApi.SearchBooks(id, "id", "exact").Books[0];
                ChitankaBookModel cBook = new ChitankaBookModel()
                {
                    Book = book, DownloadURL = e.Url
                };

                await Navigation.PushModalAsync(new NavigationPage(new BookDetailView(cBook)));
            }
            else
            {
                bool regexFb  = new Regex(@"(\d+)[-b]*.fb2.zip").Match(e.Url).Success;
                bool regexTxt = new Regex(@"(\d+)[-b]*.txt.zip").Match(e.Url).Success;
                bool regexSfb = new Regex(@"(\d+)[-b]*.sfb.zip").Match(e.Url).Success;
                if (!(regexFb || regexTxt || regexSfb))
                {
                    vm.LastPage = e.Url;
                }
            }
        }
 public BookDetailView(ChitankaBookModel book)
 {
     InitializeComponent();
     BindingContext = new BookDetailViewModel(book);
 }