From 2a4770eef322e630db08cfef28c4c474fdeaee1a Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <mail@tsommer.org>
Date: Sun, 28 Dec 2025 16:09:39 +0100
Subject: [PATCH] Enhance FileAttachment struct with validation checks for
 forbidden file types

---
 app/MindWork AI Studio/Chat/FileAttachment.cs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/app/MindWork AI Studio/Chat/FileAttachment.cs b/app/MindWork AI Studio/Chat/FileAttachment.cs
index 7f70ace3..320f21c4 100644
--- a/app/MindWork AI Studio/Chat/FileAttachment.cs	
+++ b/app/MindWork AI Studio/Chat/FileAttachment.cs	
@@ -8,10 +8,20 @@ namespace AIStudio.Chat;
 public readonly record struct FileAttachment(FileAttachmentType Type, string FileName, string FilePath, long FileSizeBytes)
 {
     /// <summary>
-    /// Gets a value indicating whether the file still exists on the file system.`
+    /// Gets a value indicating whether the file still exists on the file system.
     /// </summary>
     public bool Exists => File.Exists(this.FilePath);
 
+    /// <summary>
+    /// Gets a value indicating whether the file type is forbidden and should not be attached.
+    /// </summary>
+    public bool IsForbidden => this.Type == FileAttachmentType.FORBIDDEN;
+
+    /// <summary>
+    /// Gets a value indicating whether the file type is valid and allowed to be attached.
+    /// </summary>
+    public bool IsValid => this.Type != FileAttachmentType.FORBIDDEN;
+
     /// <summary>
     /// Creates a FileAttachment from a file path by automatically determining the type,
     /// extracting the filename, and reading the file size.