sharee.bike-App/TINK/TINK/BackdoorMethodHelpers.cs

using System.Linq;
using TINK.View.Map;
using TINK.ViewModel.Map;
using Xamarin.Forms;

namespace TINK
{
    public static class BackdoorMethodHelpers
    {
        public static void DoTapPage(string stationId )
        {
            Serilog.Log.Information($"Request via backdoor to tap station {stationId}.");
            var currentPage = GetCurrentPage();
            var mapPageViewModel = (currentPage as MapPage)?.BindingContext as MapPageViewModel;
            if (mapPageViewModel == null)
            {
                Serilog.Log.Error($"Request via backdoor to tap station {stationId} aborted because current page is not of expected type {typeof(MapPage).Name}. Type detected is {currentPage.GetType().Name}.");
                return;
            }

            Serilog.Log.Information($"Invoking member to tap.");
            mapPageViewModel?.OnStationClicked(stationId);            
        }

        /// <summary> Gets the current page assumed that app is master detail page.</summary>
        /// <returns></returns>
        static Page GetCurrentPage()
        {

#if USEFLYOUT
            return (Application.Current.MainPage as FlyoutPage)?.Detail.Navigation.NavigationStack.LastOrDefault();
#else
            return (Application.Current.MainPage as AppShellViewModel)?.Detail.Navigation.NavigationStack.LastOrDefault();
#endif
        }

    }
}