implemented search artists in MusicBrainz

HarmonyWinUI/Pages/Search.xaml.cs

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+using HarmonyWinUI.Models;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Data;
+using Microsoft.UI.Xaml.Media.Imaging;
+using Microsoft.UI.Xaml.Navigation;
+using System;
+using System.Collections.ObjectModel;
+using System.IO;
+using System.Net.Http;
+using System.Text.Json;
+using System.Threading.Tasks;
+
+// To learn more about WinUI, the WinUI project structure,
+// and more about our project templates, see: http://aka.ms/winui-project-info.
+
+namespace HarmonyWinUI.Pages;
+
+public sealed class ImageUrlToImageSourceConverter : IValueConverter
+{
+	public object? Convert(object value, Type targetType, object parameter, string language)
+	{
+		if (value is string imageUrl
+			&& Uri.TryCreate(imageUrl, UriKind.Absolute, out Uri? imageUri))
+		{
+			return new BitmapImage(imageUri);
+		}
+
+		return null;
+	}
+
+	public object ConvertBack(object value, Type targetType, object parameter, string language)
+	{
+		throw new NotSupportedException();
+	}
+}
+
+/// <summary>
+/// An empty page that can be used on its own or navigated to within a Frame.
+/// </summary>
+public sealed partial class Search : Page
+{
+	public ObservableCollection<MusicBrainzArtist> Artists { get; } = new();
+	private string? pendingSearchText;
+
+	public Search()
+	{
+		InitializeComponent();
+		Loaded += Search_Loaded;
+	}
+
+	protected override void OnNavigatedTo(NavigationEventArgs e)
+	{
+		base.OnNavigatedTo(e);
+		pendingSearchText = e.Parameter as string;
+	}
+
+	private async void Search_Loaded(object sender, RoutedEventArgs e)
+	{
+		if (pendingSearchText is not string searchText)
+		{
+			return;
+		}
+
+		pendingSearchText = null;
+		await SearchText(searchText);
+	}
+
+	private async Task SearchText(string searchText)
+	{
+		TextBlockQuery.Text = $"Query: '{searchText}'";
+		var mb = new MusicBrainz();
+
+		while (true)
+		{
+			try
+			{
+				var artists = await mb.getArtists(searchText);
+
+				this.Artists.Clear();
+				foreach (var artist in artists)
+				{
+					this.Artists.Add(artist);
+				}
+
+				return;
+			}
+			catch (Exception exception) when (
+				exception is HttpRequestException
+				or IOException
+				or JsonException
+				or TaskCanceledException
+			)
+			{
+				ContentDialog errorDialog = new ContentDialog
+				{
+					XamlRoot = XamlRoot,
+					Title = "MusicBrainz connection failed",
+					Content = $"{exception.GetType().Name}: {exception.Message}",
+					PrimaryButtonText = "Retry",
+					CloseButtonText = "Cancel",
+					DefaultButton = ContentDialogButton.Primary
+				};
+
+				ContentDialogResult result = await errorDialog.ShowAsync();
+				if (result != ContentDialogResult.Primary)
+				{
+					this.Artists.Clear();
+					return;
+				}
+			}
+		}
+	}
+}