feat: Update FaceAiTabView to support output file selection and validation for .pkl files

imagecatalog/AvaloniaViews/FaceAiTabView.axaml

@@ -4,7 +4,7 @@
     <ScrollViewer>
         <StackPanel Margin="4" Spacing="6">
             <TextBlock Text="Face Recognition Encoder" FontWeight="Bold" />
-            <TextBlock Text="Esegue face_encoder.exe usando la cartella Destinazione corrente come --images."
+            <TextBlock Text="Esegue face_encoder.exe usando la cartella Destinazione corrente come --images e un file .pkl come --out."
                        TextWrapping="Wrap" Opacity="0.8" />
 
             <TextBlock Text="Eseguibile" FontWeight="Bold" Margin="0,4,0,0" />
@@ -15,11 +15,17 @@
                 <Button Grid.Column="3" Name="FaceOpenExecutableButton" Content="Apri" Click="OpenFaceExecutableFolder_Click" Width="56" Margin="6,0,0,0" />
             </Grid>
 
+            <Grid ColumnDefinitions="Auto,*,Auto,Auto" ColumnSpacing="6">
+                <TextBlock Grid.Column="0" Text="Sorgente:" VerticalAlignment="Center" />
+                <TextBox Grid.Column="1" Name="FaceDestinationPathTextBox" Text="{Binding DestinationPath, Mode=OneWay}" IsReadOnly="True" />
+                <Button Grid.Column="3" Name="FaceOpenDestinationButton" Content="Apri" Click="OpenFaceDestinationFolder_Click" Width="56" Margin="6,0,0,0" />
+            </Grid>
+
             <TextBlock Text="Output encodings" FontWeight="Bold" Margin="0,4,0,0" />
             <Grid ColumnDefinitions="Auto,*,Auto,Auto" ColumnSpacing="6">
-                <TextBlock Grid.Column="0" Text="Cartella out:" VerticalAlignment="Center" />
+                <TextBlock Grid.Column="0" Text="File out (.pkl):" VerticalAlignment="Center" />
-                <TextBox Grid.Column="1" Name="FaceOutputFolderTextBox" Text="{Binding FaceOutputFolderPath, Mode=TwoWay}" Watermark="C:\\output\\encodings" />
+                <TextBox Grid.Column="1" Name="FaceOutputFolderTextBox" Text="{Binding FaceOutputFolderPath, Mode=TwoWay}" Watermark="C:\\output\\encodings.pkl" />
-                <Button Grid.Column="2" Name="FaceSelectOutputButton" Content="Scegli..." Click="SelectFaceOutputFolder_Click" Width="88" Margin="6,0,0,0" />
+                <Button Grid.Column="2" Name="FaceSelectOutputButton" Content="Scegli..." Click="SelectFaceOutputFile_Click" Width="88" Margin="6,0,0,0" />
                 <Button Grid.Column="3" Name="FaceOpenOutputButton" Content="Apri" Click="OpenFaceOutputFolder_Click" Width="56" Margin="6,0,0,0" />
             </Grid>
 

imagecatalog/AvaloniaViews/FaceAiTabView.axaml.cs

@@ -57,7 +57,7 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
         }
     }
 
-    private async void SelectFaceOutputFolder_Click(object? sender, RoutedEventArgs e)
+    private async void SelectFaceOutputFile_Click(object? sender, RoutedEventArgs e)
     {
         var outputBox = this.FindControl<Avalonia.Controls.TextBox>("FaceOutputFolderTextBox");
         if (outputBox is null)
@@ -72,14 +72,21 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
             return;
         }
 
-        var folders = await storageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions
+        var files = await storageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
         {
-            Title = "Seleziona cartella output encodings"
+            Title = "Seleziona file output encodings (.pkl)",
+            SuggestedFileName = "encodings.pkl",
+            DefaultExtension = "pkl",
+            FileTypeChoices =
+            [
+                new FilePickerFileType("Pickle file") { Patterns = ["*.pkl"] }
+            ],
+            ShowOverwritePrompt = true
         });
 
-        if (folders.Count > 0)
+        if (files is not null)
         {
-            outputBox.Text = folders[0].Path.LocalPath;
+            outputBox.Text = files.Path.LocalPath;
             if (DataContext is DataModel model)
             {
                 model.FaceOutputFolderPath = outputBox.Text;
@@ -119,7 +126,38 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
             return;
         }
 
-        OpenInExplorer(outputBox.Text);
+        var outputPath = outputBox.Text?.Trim();
+        if (string.IsNullOrWhiteSpace(outputPath))
+        {
+            return;
+        }
+
+        if (File.Exists(outputPath))
+        {
+            OpenInExplorer(outputPath);
+            return;
+        }
+
+        var directory = Path.GetDirectoryName(outputPath);
+        OpenInExplorer(string.IsNullOrWhiteSpace(directory) ? outputPath : directory);
+    }
+
+    private void OpenFaceDestinationFolder_Click(object? sender, RoutedEventArgs e)
+    {
+        var destBox = this.FindControl<Avalonia.Controls.TextBox>("FaceDestinationPathTextBox");
+        string? path = destBox?.Text?.Trim();
+        if (string.IsNullOrWhiteSpace(path) && DataContext is DataModel model)
+        {
+            path = (model.DestinationPath ?? string.Empty).Trim();
+        }
+
+        if (string.IsNullOrWhiteSpace(path))
+        {
+            return;
+        }
+
+        var directory = Path.GetDirectoryName(path);
+        OpenInExplorer(string.IsNullOrWhiteSpace(directory) ? path : directory);
     }
 
     private async void RunFaceEncoder_Click(object? sender, RoutedEventArgs e)
@@ -142,11 +180,11 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
         }
 
         var executablePath = executableBox.Text?.Trim().Trim('"') ?? string.Empty;
-        var outputFolder = outputFolderBox.Text?.Trim().Trim('"') ?? string.Empty;
+        var outputFilePath = outputFolderBox.Text?.Trim().Trim('"') ?? string.Empty;
         var imagesFolder = (model.DestinationPath ?? string.Empty).Trim().Trim('"');
 
         model.FaceExecutablePath = executablePath;
-        model.FaceOutputFolderPath = outputFolder;
+        model.FaceOutputFolderPath = outputFilePath;
 
         if (string.IsNullOrWhiteSpace(executablePath) || !File.Exists(executablePath))
         {
@@ -160,20 +198,30 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
             return;
         }
 
-        if (string.IsNullOrWhiteSpace(outputFolder))
+        if (string.IsNullOrWhiteSpace(outputFilePath))
         {
-            statusBlock.Text = "Inserisci la cartella di output.";
+            statusBlock.Text = "Inserisci il file di output .pkl.";
+            return;
+        }
+
+        if (!string.Equals(Path.GetExtension(outputFilePath), ".pkl", StringComparison.OrdinalIgnoreCase))
+        {
+            statusBlock.Text = "Il file di output deve avere estensione .pkl.";
             return;
         }
 
         try
         {
-            Directory.CreateDirectory(outputFolder);
+            var outputDirectory = Path.GetDirectoryName(outputFilePath);
+            if (!string.IsNullOrWhiteSpace(outputDirectory))
+            {
+                Directory.CreateDirectory(outputDirectory);
+            }
         }
         catch (Exception ex)
         {
-            _logger.LogError(ex, "Unable to create face output folder: {OutputFolder}", outputFolder);
+            _logger.LogError(ex, "Unable to create face output directory for file: {OutputFilePath}", outputFilePath);
-            statusBlock.Text = "Impossibile creare la cartella di output.";
+            statusBlock.Text = "Impossibile creare la cartella del file di output.";
             return;
         }
 
@@ -187,7 +235,7 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
         try
         {
             var imagesFolderArg = NormalizeDirectoryPathArgument(imagesFolder);
-            var outputFolderArg = NormalizeDirectoryPathArgument(outputFolder);
+            var outputFileArg = NormalizeFilePathArgument(outputFilePath);
 
             var processStartInfo = new ProcessStartInfo
             {
@@ -201,7 +249,7 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
             processStartInfo.ArgumentList.Add("--images");
             processStartInfo.ArgumentList.Add(imagesFolderArg);
             processStartInfo.ArgumentList.Add("--out");
-            processStartInfo.ArgumentList.Add(outputFolderArg);
+            processStartInfo.ArgumentList.Add(outputFileArg);
 
             using var process = new Process { StartInfo = processStartInfo, EnableRaisingEvents = true };
             process.OutputDataReceived += (_, args) =>
@@ -314,4 +362,14 @@ public partial class FaceAiTabView : Avalonia.Controls.UserControl
 
         return normalized;
     }
+
+    private static string NormalizeFilePathArgument(string value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return string.Empty;
+        }
+
+        return value.Trim().Trim('"');
+    }
 }