sharee.bike-App/LastenradBayern/TINK/View/Contact/ContactPage.xaml.cs

using Serilog;
using System;
using System.Threading.Tasks;
using TINK.Model.Bikes.BikeInfoNS.DriveNS.BatteryNS;
using TINK.Model.Device;
using TINK.ViewModel.Contact;
using Xamarin.Essentials;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using TINK.Model;

namespace TINK.View.Contact
{
	[XamlCompilation(XamlCompilationOptions.Compile)]
	public partial class ContactPage : ContentPage, IViewService
	{
		/// <summary> View model to notify view model if page appears. </summary>
		private ContactPageViewModel ViewModel { get; set; }

		public ContactPage()
		{
			InitializeComponent();

			var l_oModel = App.ModelRoot;

			ViewModel = new ContactPageViewModel(
				App.ModelRoot.Flavor.GetDisplayName(),
				l_oModel,
				() => App.CreateAttachment(),
				() => DependencyService.Get<IExternalBrowserService>().OpenUrl(DependencyService.Get<IAppInfo>().StoreUrl),
				this);

			ContactPageView.BindingContext = ViewModel;
		}

		/// <summary> Invoked when page is shown. </summary>
		protected async override void OnAppearing()
		{
			try
			{
				Log.ForContext<ContentPage>().Verbose("OnAppearing...");

				await ViewModel.OnAppearing(App.ModelRoot.SelectedStation);
			}
			catch (Exception exception)
			{
				Log.ForContext<ContentPage>().Error("Invoking OnAppearing on view model failed. {Exception}", exception);
				return;
			}
		}

		/// <summary> Displays alert message.</summary>
		/// <param name="title">Title of message.</param>
		/// <param name="message">Message to display.</param>
		/// <param name="details">Detailed error description.</param>
		/// <param name="cancel">Type of buttons.</param>
		public async Task DisplayAdvancedAlert(
		string title,
		string message,
		string details,
		string cancel)
			=> await App.Current.MainPage.DisplayAlert(title, $"{message}\r\nDetails:\r\n{details}", cancel);

		/// <summary> Displays detailed alert message.</summary>
		/// <param name="title">Title of message.</param>
		/// <param name="message">Message to display.</param>
		/// <param name="details">Detailed error description.</param>
		/// <param name="accept">Text of accept button.</param>
		/// <param name="cancel">Text of cancel button.</param>
		/// <returns>True if user pressed accept.</returns>
		public async Task<bool> DisplayAdvancedAlert(string title, string message, string details, string accept, string cancel)
			=> await App.Current.MainPage.DisplayAlert(title, !string.IsNullOrEmpty(details) ? $"{message}\r\nDetails:\r\n{details}" : $"{message}", accept, cancel);

		/// <summary> Shows a page.</summary>
		/// <param name="route">Route of the page to show.</param>
		public async Task ShowPage(string route) => await Shell.Current.GoToAsync(route);

		/// <summary> Pushes a page onto the modal stack. </summary>
		/// <param name="p_oTypeOfPage">Page to display.</param>
		public Task PushModalAsync(ViewTypes p_oTypeOfPage)
		{
			throw new NotSupportedException();
		}

		/// <summary> Pops a page from the modal stack. </summary>
		public Task PopModalAsync()
		{
			throw new NotSupportedException();
		}

		/// <summary> Pushes a page onto the stack. </summary>
		/// <param name="typeOfPage">Page to display.</param>
		public async Task PushAsync(ViewTypes typeOfPage)
		{
			var page = Activator.CreateInstance(typeOfPage.GetViewType());
			if (page == null)
			{
				return;
			}

			await Navigation.PushAsync((Page)page);
		}

#if USCSHARP9
        public Task<IViewService.IUserFeedback> DisplayUserFeedbackPopup() => throw new NotSupportedException();
#else
		public async Task<IUserFeedback> DisplayUserFeedbackPopup(IBatteryMutable battery = null) => throw new NotSupportedException();
#endif

	}
}