sharee.bike-App/SharedBusinessLogic/ViewModel/Bikes/Bike/BluetoothLock/RequestHandler/NotLoggedIn.cs

using System;
using System.Threading.Tasks;
using Serilog;
using ShareeBike.Model.State;
using ShareeBike.MultilingualResources;
using ShareeBike.View;

namespace ShareeBike.ViewModel.Bikes.Bike.BluetoothLock
{
	public class NotLoggedIn : IRequestHandler
	{
		/// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
		public NotLoggedIn(
			 InUseStateEnum state,
			 IViewService viewService,
			 IBikesViewModel bikesViewModel)
		{
			ButtonText = BC.StateToText.GetActionText(state);
			ViewService = viewService;
			BikesViewModel = bikesViewModel
								?? throw new ArgumentException($"Can not construct {GetType().Name}-object. {nameof(bikesViewModel)} must not be null.");
		}

		/// <summary>View model to be used for progress report and unlocking/ locking view.</summary>
		public IBikesViewModel BikesViewModel { get; }

		public bool IsButtonVisible => true;

		public bool IsLockitButtonVisible => false;

		public string ButtonText { get; private set; }

		public string LockitButtonText => GetType().Name;

		/// <summary>
		/// Reference on view service to show modal notifications and to perform navigation.
		/// </summary>
		private IViewService ViewService { get; }

		public bool IsConnected => throw new NotImplementedException();

		/// <summary> Gets if the bike has to be removed after action has been completed. </summary>
		public bool IsRemoveBikeRequired => false;

		public async Task<IRequestHandler> HandleRequestOption1()
		{
			Log.ForContext<BikesViewModel>().Information("User selected bike but is not logged in.");

			// User is not logged in
			BikesViewModel.ActionText = string.Empty;
			var l_oResult = await ViewService.DisplayAlert(
				AppResources.QuestionLogInTitle,
				AppResources.QuestionLogIn,
				AppResources.MessageAnswerYes,
				AppResources.MessageAnswerNo);

			if (l_oResult == false)
			{
				// User aborted booking process
				BikesViewModel.IsIdle = true;
				return this;
			}

			try
			{
				// Switch to map page
				await ViewService.ShowPage("//LoginPage");
			}
			catch (Exception p_oException)
			{
				Log.ForContext<BikesViewModel>().Error("Ein unerwarteter Fehler ist in der Klasse NotLoggedIn aufgetreten. Kontext: Aufruf nach Reservierungsversuch ohne Anmeldung. {@Exception}", p_oException);
				BikesViewModel.IsIdle = true;
				return this;
			}

			BikesViewModel.IsIdle = true;
			return this;
		}

		public async Task<IRequestHandler> HandleRequestOption2()
		{
			Log.ForContext<NotLoggedIn>().Error("Click of unsupported button detected.");
			return await Task.FromResult(this);
		}

		public string ErrorText => string.Empty;
	}
}