generate namespace for new file

src/SharpIDE.Application/Features/FileWatching/IdeFileOperationsService.cs

@@ -1,4 +1,5 @@
 using SharpIDE.Application.Features.SolutionDiscovery;
+using SharpIDE.Application.Features.SolutionDiscovery.VsPersistence;
 
 namespace SharpIDE.Application.Features.FileWatching;
 
@@ -25,10 +26,11 @@ public class IdeFileOperationsService(SharpIdeSolutionModificationService sharpI
 	// 	await _sharpIdeSolutionModificationService.RemoveFile(file);
 	// }
 
-	public async Task CreateCsFile(SharpIdeFolder parentFolder, string newFileName, string @namespace)
+	public async Task CreateCsFile(SharpIdeFolder parentFolder, string newFileName)
 	{
 		var newFilePath = Path.Combine(parentFolder.Path, newFileName);
 		var className = Path.GetFileNameWithoutExtension(newFileName);
+		var @namespace = NewFileTemplates.ComputeNamespace(parentFolder);
 		var fileText = NewFileTemplates.CsharpClass(className, @namespace);
 		await File.WriteAllTextAsync(newFilePath, fileText);
 		await _sharpIdeSolutionModificationService.CreateFile(parentFolder, newFileName, fileText);

src/SharpIDE.Application/Features/FileWatching/NewFileTemplates.cs

@@ -1,4 +1,7 @@
-namespace SharpIDE.Application.Features.FileWatching;
+using SharpIDE.Application.Features.SolutionDiscovery;
+using SharpIDE.Application.Features.SolutionDiscovery.VsPersistence;
+
+namespace SharpIDE.Application.Features.FileWatching;
 
 public static class NewFileTemplates
 {
@@ -14,4 +17,17 @@ public static class NewFileTemplates
 		           """;
 		return text;
 	}
+
+	public static string ComputeNamespace(SharpIdeFolder folder)
+	{
+		var names = new List<string>();
+		IFolderOrProject? current = folder;
+		while (current is not null)
+		{
+			names.Add(current.Name);
+			current = current.Parent as IFolderOrProject;
+		}
+		names.Reverse();
+		return string.Join('.', names);
+	}
 }

src/SharpIDE.Application/Features/SolutionDiscovery/VsPersistence/SharpIdeModels.cs

@@ -15,10 +15,11 @@ public interface IExpandableSharpIdeNode
 	public bool Expanded { get; set; }
 }
 
-public interface IFolderOrProject : IExpandableSharpIdeNode
+public interface IFolderOrProject : IExpandableSharpIdeNode, IChildSharpIdeNode
 {
 	public ObservableHashSet<SharpIdeFolder> Folders { get; init; }
 	public ObservableHashSet<SharpIdeFile> Files { get; init; }
+	public string Name { get; set; }
 }
 public interface IChildSharpIdeNode
 {

src/SharpIDE.Godot/Features/SolutionExplorer/ContextMenus/Dialogs/NewCsharpFileDialog.cs

@@ -72,7 +72,7 @@ public partial class NewCsharpFileDialog : ConfirmationDialog
 
         _ = Task.GodotRun(async () =>
         {
-           await _ideFileOperationsService.CreateCsFile(ParentFolder, fileName, "asdf");
+           await _ideFileOperationsService.CreateCsFile(ParentFolder, fileName);
         });
         QueueFree();
     }