sharee.bike-App/TINKLib/ViewModel/Bikes/Bike/BC/RequestHandler/Booked.cs

using Serilog;
using System;
using System.Threading.Tasks;
using TINK.Model.Bikes.Bike.BC;
using TINK.Model.State;
using TINK.Model.User;
using TINK.MultilingualResources;
using TINK.View;

namespace TINK.ViewModel.Bikes.Bike.BC.RequestHandler
{
    public class Booked : IRequestHandler
    {
        /// <summary> Gets the bike state. </summary>
        public InUseStateEnum State => InUseStateEnum.Booked;

        /// <summary>
        /// If a bike is booked unbooking can not be done by though app.
        /// </summary>
        public bool IsButtonVisible => false;

        /// <summary>
        /// Gets the name of the button when bike is cancel reservation.
        /// </summary>
        public string ButtonText => AppResources.ActionReturn; // "Miete beenden"

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

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

        /// <summary> Executes user request to cancel reservation. </summary>
        public async Task<IRequestHandler> HandleRequest()
        {
            // Lock list to avoid multiple taps while copri action is pending.
            BikesViewModel.ActionText = AppResources.ActivityTextOneMomentPlease;
            BikesViewModel.IsIdle = false;

            Log.ForContext<BikesViewModel>().Error("User selected booked bike {l_oId}.", SelectedBike.Id);

            BikesViewModel.ActionText = string.Empty;
            await ViewService.DisplayAlert(
                string.Empty,
                "Rückgabe nur über Bordcomputer des Fahrrads durch Drücken der Taste 2 möglich!",
                "Ok");

            BikesViewModel.IsIdle = true;
            return this;
        }

        /// <summary>
        /// Bike to display.
        /// </summary>
        protected IBikeInfoMutable SelectedBike { get; }

        /// <summary>Gets the is connected state. </summary>
        public bool IsConnected { get; set; }

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

        /// <param name="bikesViewModel">View model to be used for progress report and unlocking/ locking view.</param>
        public Booked(
            IBikeInfoMutable selectedBike,
            IViewService viewService,
            IBikesViewModel bikesViewModel,
            IUser activeUser)
        {
            SelectedBike = selectedBike;
            ViewService = viewService;
            BikesViewModel = bikesViewModel
                                ?? throw new ArgumentException($"Can not construct {GetType().Name}-object. {nameof(bikesViewModel)} must not be null.");
        }
    }
}