From 7e9109dfd2a180d32bdaca68c9066bb0ed10a6e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roland=20Ko=CC=88nig?= <roland.koenig@rolandk.de>
Date: Wed, 7 Feb 2024 10:04:46 +0800
Subject: [PATCH] Added OpenDirectoryDialogService

---
 .../MainWindow.axaml                          |  4 ++-
 .../MainWindowViewModel.cs                    | 19 ++++++++++-
 .../ViewServices/DefaultViewServices.cs       |  8 +++++
 .../FileDialogs/OpenDirectoryDialogService.cs | 33 +++++++++++++++++++
 4 files changed, 62 insertions(+), 2 deletions(-)
 create mode 100644 src/RolandK.AvaloniaExtensions/ViewServices/FileDialogs/OpenDirectoryDialogService.cs

diff --git a/src/RolandK.AvaloniaExtensions.TestApp/MainWindow.axaml b/src/RolandK.AvaloniaExtensions.TestApp/MainWindow.axaml
index 596566c..cc30298 100644
--- a/src/RolandK.AvaloniaExtensions.TestApp/MainWindow.axaml
+++ b/src/RolandK.AvaloniaExtensions.TestApp/MainWindow.axaml
@@ -20,8 +20,10 @@
             <DockPanel LastChildFill="True">
                 <Menu DockPanel.Dock="Top">
                     <MenuItem Header="File">
-                        <MenuItem Header="Open"
+                        <MenuItem Header="Open file"
                                   Command="{Binding OpenFileCommand}" />
+                        <MenuItem Header="Open directory"
+                                  Command="{Binding OpenDirectoryCommand}" />
                         
                         <Separator />
                         
diff --git a/src/RolandK.AvaloniaExtensions.TestApp/MainWindowViewModel.cs b/src/RolandK.AvaloniaExtensions.TestApp/MainWindowViewModel.cs
index 21a2da9..0edcbc2 100644
--- a/src/RolandK.AvaloniaExtensions.TestApp/MainWindowViewModel.cs
+++ b/src/RolandK.AvaloniaExtensions.TestApp/MainWindowViewModel.cs
@@ -48,7 +48,24 @@ public async Task OpenFileAsync()
         
         await srvMessageBox.ShowAsync(
             "Open file",
-            $"File {selectedFile} selected", MessageBoxButtons.Ok);
+            $"File {selectedFile} selected", 
+            MessageBoxButtons.Ok);
+    }
+
+    [RelayCommand]
+    public async Task OpenDirectoryAsync()
+    {
+        var srvOpenDirectory = this.GetViewService<IOpenDirectoryViewService>();
+        var srvMessageBox = this.GetViewService<IMessageBoxViewService>();
+
+        var selectedDirectory = await srvOpenDirectory.ShowOpenDirectoryDialogAsync(
+            "Open directory");
+        if (string.IsNullOrEmpty(selectedDirectory)) { return; }
+
+        await srvMessageBox.ShowAsync(
+            "Open directory",
+            $"Directory {selectedDirectory} selected",
+            MessageBoxButtons.Ok);
     }
 
     [RelayCommand]
diff --git a/src/RolandK.AvaloniaExtensions/ViewServices/DefaultViewServices.cs b/src/RolandK.AvaloniaExtensions/ViewServices/DefaultViewServices.cs
index 56d8ab5..daaf6db 100644
--- a/src/RolandK.AvaloniaExtensions/ViewServices/DefaultViewServices.cs
+++ b/src/RolandK.AvaloniaExtensions/ViewServices/DefaultViewServices.cs
@@ -33,6 +33,14 @@ internal static class DefaultViewServices
             
             return new MessageBoxViewControlService(dlgHostControl);
         }
+
+        if (viewServiceType == typeof(IOpenDirectoryViewService))
+        {
+            var parentWindow = host.FindLogicalAncestorOfType<Window>(true);
+            if (parentWindow == null) { return null; }
+
+            return new OpenDirectoryDialogService(parentWindow);
+        }
         
         return null;
     }
diff --git a/src/RolandK.AvaloniaExtensions/ViewServices/FileDialogs/OpenDirectoryDialogService.cs b/src/RolandK.AvaloniaExtensions/ViewServices/FileDialogs/OpenDirectoryDialogService.cs
new file mode 100644
index 0000000..bb53f10
--- /dev/null
+++ b/src/RolandK.AvaloniaExtensions/ViewServices/FileDialogs/OpenDirectoryDialogService.cs
@@ -0,0 +1,33 @@
+using System.Web;
+using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+using RolandK.AvaloniaExtensions.ViewServices.Base;
+
+namespace RolandK.AvaloniaExtensions.ViewServices.FileDialogs;
+
+public class OpenDirectoryDialogService : ViewServiceBase, IOpenDirectoryViewService
+{
+    private Window _parent;
+    
+    public OpenDirectoryDialogService(Window parent)
+    {
+        _parent = parent;
+    }
+
+    /// <inheritdoc />
+    public async Task<string?> ShowOpenDirectoryDialogAsync(string title)
+    {
+        var options = new FolderPickerOpenOptions();
+        options.AllowMultiple = false;
+        options.Title = title;
+
+        var selectedFolders = await _parent.StorageProvider.OpenFolderPickerAsync(options);
+        if ((selectedFolders == null) ||
+            (selectedFolders.Count == 0))
+        {
+            return null;
+        }
+
+        return HttpUtility.UrlDecode(selectedFolders[0].Path.AbsolutePath);
+    }
+}
\ No newline at end of file