Libation/Source/LibationAvalonia/Controls/DirectorySelectControl.axaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Data;
using Avalonia.Data.Converters;
using Dinah.Core;
using LibationFileManager;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;

namespace LibationAvalonia.Controls;

public class KnownDirectoryConverter : IValueConverter
{
	public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
	{
		if (value is Configuration.KnownDirectories dir)
			return dir.GetDescription();
		return new BindingNotification(new InvalidCastException(), BindingErrorType.Error);
	}

	public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
	{
		return new BindingNotification(new InvalidCastException(), BindingErrorType.Error);
	}
}
public class KnownDirectoryPath : IMultiValueConverter
{
	public object? Convert(IList<object?> values, Type targetType, object? parameter, CultureInfo culture)
	{
		if (values?.Count == 2 && values[0] is Configuration.KnownDirectories kdir && kdir is not Configuration.KnownDirectories.None)
		{
			var subdir = values[1] as string ?? "";
			var path = kdir is Configuration.KnownDirectories.AppDir ? Configuration.AppDir_Absolute : Configuration.GetKnownDirectoryPath(kdir);
			return path is null ? "" : Path.Combine(path, subdir);
		}
		return "";
	}

	public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
	{
		return new BindingNotification(new InvalidCastException(), BindingErrorType.Error);
	}
}

public partial class DirectorySelectControl : UserControl
{
	public static List<Configuration.KnownDirectories> DefaultKnownDirectories { get; }
		= new()
		{
			Configuration.KnownDirectories.WinTemp,
			Configuration.KnownDirectories.UserProfile,
			Configuration.KnownDirectories.ApplicationData,
			Configuration.KnownDirectories.AppDir,
			Configuration.KnownDirectories.MyMusic,
			Configuration.KnownDirectories.MyDocs,
			Configuration.KnownDirectories.LibationFiles
		};

	public static readonly StyledProperty<Configuration.KnownDirectories?> SelectedDirectoryProperty =
	AvaloniaProperty.Register<DirectorySelectControl, Configuration.KnownDirectories?>(nameof(SelectedDirectory));

	public static readonly StyledProperty<List<Configuration.KnownDirectories>> KnownDirectoriesProperty =
	AvaloniaProperty.Register<DirectorySelectControl, List<Configuration.KnownDirectories>>(nameof(KnownDirectories), DefaultKnownDirectories);

	public static readonly StyledProperty<string> SubDirectoryProperty =
	AvaloniaProperty.Register<DirectorySelectControl, string>(nameof(SubDirectory));

	public DirectorySelectControl()
	{
		InitializeComponent();
	}

	public List<Configuration.KnownDirectories> KnownDirectories
	{
		get => GetValue(KnownDirectoriesProperty);
		set => SetValue(KnownDirectoriesProperty, value);
	}

	public Configuration.KnownDirectories? SelectedDirectory
	{
		get => GetValue(SelectedDirectoryProperty);
		set => SetValue(SelectedDirectoryProperty, value);
	}

	public string SubDirectory
	{
		get => GetValue(SubDirectoryProperty);
		set => SetValue(SubDirectoryProperty, value);
	}
}