Add FolderProvider

Toolkit.Avalonia/FileProvider.cs

@@ -11,21 +11,21 @@ public class FileProvider(ITopLevelProvider topLevelProvider) :
     {
         if (topLevelProvider.Get() is TopLevel topLevel)
         {
-            IReadOnlyList<IStorageFile> storageFiles = await topLevel.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions()
+            IReadOnlyList<IStorageFile> files = await topLevel.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions()
             {
                 AllowMultiple = filter.AllowMultiple,
-                FileTypeFilter = new List<FilePickerFileType>
-                {
+                FileTypeFilter =
+                [
                     new(filter.Name)
                     {
                         Patterns = filter.Extensions is { Count: > 0 } ? filter.Extensions.Select(x => $"*.{x}").ToList() : ["*.*"]
                     }
-                }
+                ]
             });
 
-            return storageFiles.Select(file => file.Path.LocalPath).ToList();
+            return files.Select(x => x.Path.LocalPath).ToList();
         }
 
-        return Array.Empty<string>();
+        return [];
     }
 }

Toolkit.Avalonia/FolderProvider.cs

@@ -0,0 +1,25 @@
+using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+using Toolkit.Foundation;
+
+namespace Toolkit.Avalonia;
+
+public class FolderProvider(ITopLevelProvider topLevelProvider) :
+    IFolderProvider
+{
+    public async Task<IReadOnlyCollection<string>> SelectFolders(FolderFilter filter)
+    {
+        if (topLevelProvider.Get() is TopLevel topLevel)
+        {
+            IReadOnlyList<IStorageFolder> folders = await topLevel.StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions()
+            {
+                AllowMultiple = filter.AllowMultiple  
+            });
+
+
+            return folders.Select(x => x.Path.LocalPath).ToList();
+        }
+
+        return [];
+    }
+}

Toolkit.Avalonia/IServiceCollectionExtensions.cs

@@ -126,6 +126,7 @@ public static class IServiceCollectionExtensions
     {
         services.AddTransient<ITopLevelProvider, TopLevelProvider>();
         services.AddTransient<IFileProvider, FileProvider>();
+        services.AddTransient<IFolderProvider, FolderProvider>();
 
         services.AddTransient<IClipboardWriter, ClipboardWriter>();
 
@@ -139,6 +140,7 @@ public static class IServiceCollectionExtensions
         services.AddTransient<INavigationRegion, NavigationRegion>();
 
         services.AddHandler<WriteClipboardHandler>();
+        services.AddHandler<SelectFoldersHandler>();
 
         services.AddHandler<ClassicDesktopStyleApplicationHandler>(nameof(IClassicDesktopStyleApplicationLifetime));
         services.AddHandler<SingleViewApplicationHandler>(nameof(ISingleViewApplicationLifetime));
@@ -157,6 +159,7 @@ public static class IServiceCollectionExtensions
             {
                 services.AddTransient<ITopLevelProvider, TopLevelProvider>();
                 services.AddTransient<IFileProvider, FileProvider>();
+                services.AddTransient<IFolderProvider, FolderProvider>();
 
                 services.AddTransient<IClipboardWriter, ClipboardWriter>();
 
@@ -170,6 +173,7 @@ public static class IServiceCollectionExtensions
                 services.AddTransient<INavigationRegion, NavigationRegion>();
 
                 services.AddHandler<WriteClipboardHandler>();
+                services.AddHandler<SelectFoldersHandler>();
 
                 services.AddHandler<ContentControlHandler>(nameof(ContentControl));
                 services.AddHandler<FrameHandler>(nameof(Frame));

Toolkit.Foundation/FileFilter.cs

@@ -1,3 +1,3 @@
 namespace Toolkit.Foundation;
 
-public record FileFilter(string Name, List<string> Extensions, bool AllowMultiple = false);
+public record FileFilter(string Name, List<string> Extensions, bool AllowMultiple = false);

Toolkit.Foundation/FolderFilter.cs

@@ -0,0 +1,3 @@
+namespace Toolkit.Foundation;
+
+public record FolderFilter(bool AllowMultiple = false);

Toolkit.Foundation/IFolderProvider.cs

@@ -0,0 +1,6 @@
+namespace Toolkit.Foundation;
+
+public interface IFolderProvider
+{
+    Task<IReadOnlyCollection<string>> SelectFolders(FolderFilter filter);
+}

Toolkit.Foundation/Result.cs

@@ -12,3 +12,22 @@ public record Result<TValue> :
 
     public static implicit operator Result<TValue>(TValue? value) => Create(value);
 }
+
+
+public record Result(bool IsSuccess, Error Error)
+{
+    public bool IsFailure => !IsSuccess;
+
+    public static Result Success() => new(true, Error.None);
+
+    public static Result<TValue> Success<TValue>(TValue value) => new(value, true, Error.None);
+
+    public static Result Failure(Error error) => new(false, error);
+
+    public static Result<TValue> Failure<TValue>(Error error) => new(default, false, error);
+
+    public static Result Create(bool condition) => condition ? Success() : Failure(Error.ConditionNotMet);
+
+    public static Result<TValue> Create<TValue>(TValue? value) => value is not null ? Success(value) : Failure<TValue>(Error.Null);
+
+}

Toolkit.Foundation/Result1.cs

@@ -1,19 +0,0 @@
-namespace Toolkit.Foundation;
-
-public record Result(bool IsSuccess, Error Error)
-{
-    public bool IsFailure => !IsSuccess;
-
-    public static Result Success() => new(true, Error.None);
-
-    public static Result<TValue> Success<TValue>(TValue value) => new(value, true, Error.None);
-
-    public static Result Failure(Error error) => new(false, error);
-
-    public static Result<TValue> Failure<TValue>(Error error) => new(default, false, error);
-
-    public static Result Create(bool condition) => condition ? Success() : Failure(Error.ConditionNotMet);
-
-    public static Result<TValue> Create<TValue>(TValue? value) => value is not null ? Success(value) : Failure<TValue>(Error.Null);
-
-}

Toolkit.Foundation/SelectFoldersHandler.cs

@@ -0,0 +1,20 @@
+namespace Toolkit.Foundation;
+
+public class SelectFoldersHandler(IFolderProvider folderProvider) :
+    IHandler<SelectionEventArgs<FolderFilter>, IReadOnlyCollection<string>?>
+{
+    public async Task<IReadOnlyCollection<string>?> Handle(SelectionEventArgs<FolderFilter> args, 
+        CancellationToken cancellationToken)
+    {
+        if (args.Sender is FolderFilter filter)
+        {
+            if (await folderProvider.SelectFolders(filter)
+                is { Count: > 0 } folders)
+            {
+                return folders;
+            }
+        }
+
+        return default;
+    }
+}