sharee.bike-App/Meinkonrad/TINK/ViewModel/RootShell/AppShellViewModel.cs

using TINK.MultilingualResources;
using TINK.ViewModel.Info;
using TINK.Services.CopriApi.ServerUris;
using System.ComponentModel;
using TINK.View.Themes;
using TINK.Services;

namespace TINK.ViewModel.RootShell
{
    public class AppShellViewModel : INotifyPropertyChanged
    {
        public AppShellViewModel()
        {
            App.ModelRoot.ActiveUser.StateChanged += (sender, eventargs) =>
            {
                // Login state changed. Update related menu entries.
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsMyBikesPageVisible)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsFindBikePageVisible)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsAccountPageVisible)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsLoginPageVisible)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsSettingsPageVisible)));
            };

            // Update flyout view model whenever theme is switched.
            App.ModelRoot.Themes.PropertyChanged += (sender, eventargs) =>
            {
                if (!(sender is ServicesContainerMutable<object> themes))
                    return;

                MasterDetailMenuTitlte = GetMasterDetailMenuTitle(themes.Active);

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

            MasterDetailMenuTitlte = GetMasterDetailMenuTitle(App.ModelRoot.Themes.Active);
        }

        /// <summary>
        /// Gets the flyout title from theme name
        /// </summary>
        /// <param name="theme">Name of theme.</param>
        /// <returns>Flyout title.</returns>
        private string GetMasterDetailMenuTitle(object theme)
        {
            if (!(theme is ITheme active))
                return "sharee.bike";

            return $"{(!string.IsNullOrEmpty(active.OperatorInfo) ? ($"{active.OperatorInfo}") : "sharee.bike")}";
        }

        /// <summary>
        /// Holds the title of the fylout page.
        /// </summary>
        public string MasterDetailMenuTitlte { get; private set; }

        public event PropertyChangedEventHandler PropertyChanged;

        public bool IsMyBikesPageVisible => App.ModelRoot.ActiveUser.IsLoggedIn;

        public bool IsFindBikePageVisible => App.ModelRoot.ActiveUser.IsLoggedIn;

        public bool IsAccountPageVisible => App.ModelRoot.ActiveUser.IsLoggedIn;

        public bool IsLoginPageVisible => !App.ModelRoot.ActiveUser.IsLoggedIn;

        public bool IsSettingsPageVisible => App.ModelRoot.Uris.ActiveUri.Host.GetIsCopri()
                || App.ModelRoot.ActiveUser.IsLoggedIn;

        public string TabbedPageIngoTitle => AppResources.MarkingAbout;

    }
}