sharee.bike-App/SharedGui/ViewModel/NotConnectedToNetViewModel.cs

using System;
using System.ComponentModel;
using System.Threading.Tasks;
using ShareeBike.MultilingualResources;
using Xamarin.Essentials;

namespace SharedGui.ViewModel
{
	public class NotConnectedToNetViewModel : INotifyPropertyChanged
	{

		public bool IsNotConnectedToNet { get; set; }

		private bool _isBikesDataOutdatedLabelVisible = false;

		public event PropertyChangedEventHandler PropertyChanged;

		public bool IsBikesDataOutdatedLabelVisible
		{
			get { return _isBikesDataOutdatedLabelVisible; }
			set
			{
				_isBikesDataOutdatedLabelVisible = value;
				PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsBikesDataOutdatedLabelVisible)));
			}
		}
		public NotConnectedToNetViewModel()
		{
			IsNotConnectedToNet = Connectivity.NetworkAccess != NetworkAccess.Internet;
			// Register for connectivity changes, be sure to unsubscribe when finished
			Connectivity.ConnectivityChanged += Connectivity_ConnectivityChanged;
		}

		public async void Connectivity_ConnectivityChanged(object sender, ConnectivityChangedEventArgs e)
		{
			IsNotConnectedToNet = e.NetworkAccess != NetworkAccess.Internet;
			PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsNotConnectedToNet)));

			if (IsNotConnectedToNet)
			{
				IsBikesDataOutdatedLabelVisible = false;
			}
			else
			{
				IsBikesDataOutdatedLabelVisible = true;
				await Task.Delay(TimeSpan.FromSeconds(5));
				IsBikesDataOutdatedLabelVisible = false;

			}
			PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsBikesDataOutdatedLabelVisible)));

		}
	}
}