Initial version.

TINKLib/ViewModel/Bikes/Bike/BluetoothLock/RequestHandler/NotLoggedIn.cs

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+using Serilog;
+using System;
+using System.ComponentModel;
+using System.Threading.Tasks;
+using TINK.Model.State;
+using TINK.View;
+
+namespace TINK.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)
+        {
+            State = 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 InUseStateEnum State { get; }
+
+        public bool IsButtonVisible => true;
+
+        public bool IsLockitButtonVisible => false;
+
+        public string ButtonText => BC.StateToText.GetActionText(State);
+
+        public string LockitButtonText => GetType().Name;
+
+        /// <summary>
+        /// Reference on view servcie 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 remvoed 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(
+                "Hinweis",
+                "Bitte anmelden vor Reservierung eines Fahrrads!\r\nAuf Anmeldeseite wechseln?",
+                "Ja",
+                "Nein");
+
+            if (l_oResult == false)
+            {
+                // User aborted booking process
+                BikesViewModel.IsIdle = true;
+                return this;
+            }
+
+            try
+            {
+                // Switch to map page
+                ViewService.ShowPage(ViewTypes.LoginPage);
+            }
+            catch (Exception p_oException)
+            {
+                Log.ForContext<BikesViewModel>().Error("Ein unerwarteter Fehler ist auf der Seite Anmelden 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;
+    }
+}