sharee.bike-App/Meinkonrad/TINK/View/MyBikes/MyBikesPage.xaml.cs

using Plugin.Connectivity;
using System;
using System.Threading;
using System.Threading.Tasks;
#if USEFLYOUT
using TINK.View.MasterDetail;
#endif
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace TINK.View.MyBikes
{
	using Serilog;
	using TINK.Model;
	using TINK.Model.Bikes.BikeInfoNS.DriveNS.BatteryNS;
	using TINK.Model.Device;
	using TINK.ViewModel.MyBikes;
	using Xamarin.CommunityToolkit.Extensions;

	[XamlCompilation(XamlCompilationOptions.Compile)]
	public partial class MyBikesPage : ContentPage, IViewService
	{
		/// <summary> Refernce to view model. </summary>
		MyBikesPageViewModel m_oViewModel = null;

		/// <summary> Initialization status to ensure initialization logic is not called multiple times. </summary>
		private bool isInitializationStarted = false;

		/// <summary>
		/// Constructs a my bikes page.
		/// </summary>
		public MyBikesPage()
		{
		}

		/// <summary>
		/// Invoked when page is shown. 
		/// Starts update process.
		/// </summary>
		protected async override void OnAppearing()
		{
			// Don't repeat the initialization if it has been completed already.
			if (isInitializationStarted) return;
			isInitializationStarted = true;

			if (m_oViewModel != null)
			{
				// No need to create view model, set binding context an items source if already done.
				// If done twice tap events are fired multiple times (when hiding page using home button).
				await m_oViewModel.OnAppearingOrRefresh();
				isInitializationStarted = false;
				return;
			}

			try
			{
				var model = App.ModelRoot;

				m_oViewModel = new MyBikesPageViewModel(
					model.ActiveUser,
					App.PermissionsService,
					App.BluetoothService,
					Device.RuntimePlatform,
					() => model.GetIsConnected(),
					(isConnected) => model.GetConnector(isConnected),
					App.LocationServicesContainer.Active,
					model.LocksServices.Active,
					model.Stations,
					model.Polling,
					model.PostAction,
					model.SmartDevice,
					this,
					(url) => DependencyService.Get<IExternalBrowserService>().OpenUrl(url))
				{
					IsReportLevelVerbose = model.IsReportLevelVerbose
				};
			}
			catch (Exception exception)
			{
				Log.ForContext<MyBikesPage>().Error("Displaying bikes at station page failed. {Exception}", exception);
				await DisplayAlert("Fehler", $"Seite Räder an Station kann nicht angezeigt werden. ${exception.Message}", "OK");
				isInitializationStarted = false;
				return;
			}

			InitializeComponent();

			BindingContext = m_oViewModel;
			MyBikesListView.ItemsSource = m_oViewModel;

			await m_oViewModel.OnAppearingOrRefresh();
			isInitializationStarted = false;
		}

		/// <summary>
		/// Invoked when pages is closed/ hidden. 
		/// Stops update process.
		/// </summary>
		protected async override void OnDisappearing()
		{
			if (m_oViewModel == null)
			{
				// View model might be null (Example: Occured when page to querry for location permissions was opened)
				return;
			}

			await m_oViewModel.OnDisappearing();
		}

		/// <summary>
		/// Displays alert message.
		/// </summary>
		/// <param name="p_strTitle">Title of message.</param>
		/// <param name="p_strMessage">Message to display.</param>
		/// <param name="p_strCancel">Type of buttons.</param>
		public new async Task DisplayAlert(string p_strTitle, string p_strMessage, string p_strCancel)
			=> await App.Current.MainPage.DisplayAlert(p_strTitle, p_strMessage, p_strCancel);

		/// <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>
		/// Displays alert message.
		/// </summary>
		/// <param name="p_strTitle">Title of message.</param>
		/// <param name="p_strMessage">Message to display.</param>
		/// <param name="p_strAccept">Text of accept button.</param>
		/// <param name="p_strCancel">Text of button.</param>
		/// <returns>True if user pressed accept.</returns>
		public new async Task<bool> DisplayAlert(string p_strTitle, string p_strMessage, string p_strAccept, string p_strCancel)
			=> await App.Current.MainPage.DisplayAlert(p_strTitle, p_strMessage, p_strAccept, p_strCancel);

#if USEFLYOUT
        public void ShowPage(ViewTypes p_oType, string p_strTitle = null)
            => throw new NotImplementedException();
#else
		/// <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);
#endif

		/// <summary> Pushes a page onto the modal stack. </summary>
		/// <param name="typeOfPage">Page to display.</param>
		public async Task PushModalAsync(ViewTypes typeOfPage)
			=> await Navigation.PushModalAsync((Page)Activator.CreateInstance(typeOfPage.GetViewType()));


		/// <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="p_oTypeOfPage">Page to display.</param>
		public Task PushAsync(ViewTypes p_oTypeOfPage) => throw new NotSupportedException();

#if USCSHARP9
        public async Task<IViewService.IUserFeedback> DisplayUserFeedbackPopup() => await Navigation.ShowPopupAsync<FeedbackPopup.Result>(new FeedbackPopup());
#else
		/// <summary> Displays user feedback popup.</summary>
		/// <param name="co2Saving"> Co2 saving information.</param>
		/// <returns>User feedback.</returns>
		public async Task<IUserFeedback> DisplayUserFeedbackPopup(IBattery battery = null, string co2Saving = null) => await Navigation.ShowPopupAsync<FeedbackPopup.Result>(new FeedbackPopup(battery, co2Saving));
#endif
	}
}