FoxTube/FoxTube/MainPage.xaml.cs

using FoxTube.Core.Helpers;
using FoxTube.Core.Models;
using Google.Apis.YouTube.v3.Data;
using System;
using System.Collections.Generic;
using System.Linq;
using Windows.ApplicationModel.Core;
using Windows.Foundation.Metadata;
using Windows.UI;
using Windows.UI.Popups;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;

namespace FoxTube
{
    public sealed partial class MainPage : Page
    {
        public static MainPage Current { get; set; }
        public MainPage()
        {
            Current = this;
            InitializeComponent();

            if (Settings.Theme == 0)
                RequestedTheme = ElementTheme.Light;
            else if (Settings.Theme == 1)
                RequestedTheme = ElementTheme.Dark;

            Navigate(typeof(Views.Home));

            Window.Current.SetTitleBar(AppTitleBar);

            CoreApplication.GetCurrentView().TitleBar.ExtendViewIntoTitleBar = true;

            ApplicationViewTitleBar titleBar = ApplicationView.GetForCurrentView().TitleBar;
            titleBar.ButtonBackgroundColor = Colors.Transparent;
            titleBar.ButtonHoverBackgroundColor = Color.FromArgb(50, 255, 255, 255);
            titleBar.ButtonPressedBackgroundColor = Color.FromArgb(20, 255, 255, 255);

            if (RequestedTheme == ElementTheme.Default)
                titleBar.ButtonForegroundColor =
                    titleBar.ButtonHoverForegroundColor =
                        titleBar.ButtonPressedForegroundColor = Application.Current.RequestedTheme == ApplicationTheme.Dark ? Colors.White : Colors.Black;
            else
                titleBar.ButtonForegroundColor =
                    titleBar.ButtonHoverForegroundColor =
                        titleBar.ButtonPressedForegroundColor = RequestedTheme == ElementTheme.Dark ? Colors.White : Colors.Black;

            LeaveFeedback.Visibility = Feedback.HasFeedbackHub ? Visibility.Visible : Visibility.Collapsed;
            RemoveAds.Visibility = StoreInterop.AdsDisabled ? Visibility.Collapsed : Visibility.Visible;
            if (!StoreInterop.AdsDisabled)
                RemoveAds.Content += $" ({StoreInterop.Price})";

            if (Settings.PromptReview)
                Feedback.PromptReview();
            if (Settings.PromptFeedback)
                Feedback.PromptFeedback();
        }

        void NavigationView_DisplayModeChanged(Microsoft.UI.Xaml.Controls.NavigationView sender, Microsoft.UI.Xaml.Controls.NavigationViewDisplayModeChangedEventArgs args)
        {
            Thickness currMargin = AppTitleBar.Margin;
            AppTitleBar.Margin = new Thickness(
                sender.CompactPaneLength * (sender.DisplayMode == Microsoft.UI.Xaml.Controls.NavigationViewDisplayMode.Minimal ? 2 : 1),
                currMargin.Top,
                currMargin.Right,
                currMargin.Bottom);

            UpdateAppTitleMargin(sender);
        }
        void NavigationView_PaneClosing(Microsoft.UI.Xaml.Controls.NavigationView sender, Microsoft.UI.Xaml.Controls.NavigationViewPaneClosingEventArgs args) =>
            UpdateAppTitleMargin(sender);

        void NavigationView_PaneOpening(Microsoft.UI.Xaml.Controls.NavigationView sender, object args) =>
            UpdateAppTitleMargin(sender);

        void UpdateAppTitleMargin(Microsoft.UI.Xaml.Controls.NavigationView sender)
        {
            const int smallLeftIndent = 4, largeLeftIndent = 12;

            if (ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 7))
            {
                AppTitle.TranslationTransition = new Vector3Transition();

                if (sender.DisplayMode == Microsoft.UI.Xaml.Controls.NavigationViewDisplayMode.Expanded && sender.IsPaneOpen)
                    AppTitle.Translation = new System.Numerics.Vector3(smallLeftIndent, 0, 0);
                else
                    AppTitle.Translation = new System.Numerics.Vector3(largeLeftIndent, 0, 0);
            }
            else
            {
                Thickness currMargin = AppTitle.Margin;

                if (sender.DisplayMode == Microsoft.UI.Xaml.Controls.NavigationViewDisplayMode.Expanded && sender.IsPaneOpen)
                    AppTitle.Margin = new Thickness(smallLeftIndent, currMargin.Top, currMargin.Right, currMargin.Bottom);
                else
                    AppTitle.Margin = new Thickness(largeLeftIndent, currMargin.Top, currMargin.Right, currMargin.Bottom);
            }
        }

        void LeaveFeedback_Click(object sender, RoutedEventArgs e) =>
            Feedback.OpenFeedbackHub();

        async void RemoveAds_Tapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
        {
            bool success = await StoreInterop.PurchaseApp();
            if (success)
            {
                MessageDialog dialog = new MessageDialog("Thanks for purchasing full version of the app (＾∇＾) In order to complete changes we need to reopen it. Or you can do it later (but some elements may be broken)", "Thank you for your purchase!");
                dialog.Commands.Add(new UICommand("Restart", (command) => Utils.RestartApp()));
                dialog.Commands.Add(new UICommand("Later"));
                dialog.CancelCommandIndex = 1;
                dialog.DefaultCommandIndex = 0;
                await dialog.ShowAsync();
            }
        }

        public static void Navigate(Type pageType) =>
            Navigate(pageType, null);

        public static void Navigate(Type pageType, object param)
        {
            if (pageType == Current.content.CurrentSourcePageType && param == (Current.content.Content as PageView).Parameter)
                return;
            // TODO: Add navigation logic for videos
            Current.content.Navigate(pageType, param);
        }

        public static void SetHeader(string title) =>
            Current.title.Text = title;

        void Content_Navigated(object sender, NavigationEventArgs e)
        {
            refresh.Visibility = (e.Content is IRefreshable) ? Visibility.Visible : Visibility.Collapsed;
            NavigationViewControl.IsBackEnabled = content.CanGoBack;
            title.Text = (e.Content as PageView).Header ?? "FoxTube";
            switch(e.SourcePageType.Name)
            {
                case "Home":
                    NavigationViewControl.SelectedItem = home;
                    break;
                case "Settings":
                    NavigationViewControl.SelectedItem = NavigationViewControl.SettingsItem;
                    break;
                case "Subscriptions":
                    NavigationViewControl.SelectedItem = subscriptions;
                    break;
                default:
                    NavigationViewControl.SelectedItem = null;
                    break;
            }
        }

        void Refresh_Click(object sender, RoutedEventArgs e)
        {
            if (video.Content != null)
                (video.Content as IRefreshable)?.RefreshPage();
            else
                (content.Content as IRefreshable)?.RefreshPage();
        }

        void AutoSuggestBox_TextChanged(AutoSuggestBox sender, AutoSuggestBoxTextChangedEventArgs args)
        {
            if (sender.Text.Length < 3 || args.Reason != AutoSuggestionBoxTextChangeReason.UserInput)
                return;

            // TODO: Load suggestions

            // TODO: Remove
            sender.ItemsSource = new List<SearchSuggestion>
            {
                new SearchSuggestion("Suggestion 0"),
                new SearchSuggestion("Suggestion 1"),
                new SearchSuggestion("Suggestion 2"),
                new SearchSuggestion("Suggestion 3"),
                new SearchSuggestion("Suggestion 4"),
                new SearchSuggestion("History entry 0", true),
                new SearchSuggestion("History entry 1", true),
                new SearchSuggestion("History entry 2", true)
            };
        }

        void AutoSuggestBox_QuerySubmitted(AutoSuggestBox sender, AutoSuggestBoxQuerySubmittedEventArgs args)
        {
            if (args.QueryText.Length < 3)
                return;
            // TODO: Go to search
            Navigate(typeof(Views.Search));
        }

        void NavigationViewControl_BackRequested(Microsoft.UI.Xaml.Controls.NavigationView sender, Microsoft.UI.Xaml.Controls.NavigationViewBackRequestedEventArgs args)
        {
            // TODO: Add backward navigation logic for videos
            if (content.CanGoBack)
                content.GoBack();
        }

        void NavigationViewControl_ItemInvoked(Microsoft.UI.Xaml.Controls.NavigationView sender, Microsoft.UI.Xaml.Controls.NavigationViewItemInvokedEventArgs args)
        {
            if (args.IsSettingsInvoked)
                Navigate(typeof(Views.Settings));
            else 
                switch((args.InvokedItemContainer as Microsoft.UI.Xaml.Controls.NavigationViewItem).Name)
                {
                    case "home":
                        Navigate(typeof(Views.Home));
                        break;
                    case "subscriptions":
                        Navigate(typeof(Views.Subscriptions));
                        break;
                    case "history":
                        break;
                    case "liked":
                        break;
                    case "wl":
                        break;
                    case "download":
                        break;
                    case "music":
                        break;
                    case "sports":
                        break;
                    case "movies":
                        break;
                    case "news":
                        break;
                    case "live":
                        break;
                    case "spotlight":
                        break;
                    case "vr":
                        break;
                    default:
                        break;
                }
        }

        public void Update()
        {
            if(UsersControl.Authorized)
            {
                for (int i = NavigationViewControl.MenuItems.IndexOf(subscriptions); i < NavigationViewControl.MenuItems.IndexOf(categoriesHeader); i++)
                    (NavigationViewControl.MenuItems[i] as FrameworkElement).Visibility = Visibility.Visible;

                for (int i = NavigationViewControl.MenuItems.IndexOf(categoriesHeader); i < NavigationViewControl.MenuItems.Count; i++)
                    (NavigationViewControl.MenuItems[i] as FrameworkElement).Visibility = Visibility.Collapsed;

                foreach (Subscription i in UsersControl.CurrentUser.Subscriptions)
                    NavigationViewControl.MenuItems.Insert(NavigationViewControl.MenuItems.IndexOf(categoriesHeader), i);
            }
            else
            {
                IEnumerable<object> subs = from i in NavigationViewControl.MenuItems 
                           where string.IsNullOrWhiteSpace((i as FrameworkElement).Name) 
                           select i;

                foreach (object i in subs)
                    NavigationViewControl.MenuItems.Remove(i);

                for (int i = NavigationViewControl.MenuItems.IndexOf(subscriptions); i < NavigationViewControl.MenuItems.IndexOf(categoriesHeader); i++)
                    (NavigationViewControl.MenuItems[i] as FrameworkElement).Visibility = Visibility.Collapsed;

                for (int i = NavigationViewControl.MenuItems.IndexOf(categoriesHeader); i < NavigationViewControl.MenuItems.Count; i++)
                    (NavigationViewControl.MenuItems[i] as FrameworkElement).Visibility = Visibility.Visible;
            }
        }
    }
}