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

using Serilog;
using System;
using System.Threading.Tasks;
using TINK.Model.Device;
#if USEFLYOUT
using TINK.View.MasterDetail;
#endif
using TINK.ViewModel.Info;
using Xamarin.Essentials;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

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

        public ContactPage()
        {
            InitializeComponent();

            ViewModel = new ContactPageViewModel(App.ModelRoot.Uris.ActiveUri,
                AppInfo.Name,
                () => 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);

#if USEFLYOUT
        public void ShowPage(ViewTypes p_oType, string title = null)
            => NavigationMasterDetail.ShowPage(p_oType.GetViewType(), title);
#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="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)
        {
#if USEFLYOUT
            var page = Activator.CreateInstance(typeOfPage.GetViewType()) as IDetailPage;
#else
            var page = Activator.CreateInstance(typeOfPage.GetViewType());
#endif
            if (page == null)
            {
                return;
            }

#if USEFLYOUT
            page.NavigationMasterDetail = NavigationMasterDetail;
#endif
            await Navigation.PushAsync((Page)page);
        }

#if USCSHARP9
        public Task<IViewService.IUserFeedback> DisplayUserFeedbackPopup() => throw new NotSupportedException();
#else
        public Task<IUserFeedback> DisplayUserFeedbackPopup(string co2Saving = null) => throw new NotSupportedException();
#endif

#if USEFLYOUT

        /// <summary>
        /// Delegate to perform navigation.
        /// </summary>
        public INavigationMasterDetail NavigationMasterDetail { set; private get; }
#endif
    }
}