From 1491f60791733a70878c9716476ed22667f186e8 Mon Sep 17 00:00:00 2001
From: Elias Fierke <fierke@mypapertown.de>
Date: Mon, 8 Jun 2026 15:31:41 +0200
Subject: [PATCH] [fix:] added unversioned file...

---
 PathUtilities.cs | 57 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 PathUtilities.cs

diff --git a/PathUtilities.cs b/PathUtilities.cs
new file mode 100644
index 0000000..b008b19
--- /dev/null
+++ b/PathUtilities.cs
@@ -0,0 +1,57 @@
+using System;
+using System.IO;
+
+namespace Logof_Client;
+
+public static class PathUtilities
+{
+    private static readonly char[] WindowsInvalidFileNameChars =
+    {
+        '<', '>', ':', '"', '/', '\\', '|', '?', '*'
+    };
+
+    private static readonly string[] WindowsReservedFileNames =
+    {
+        "CON", "PRN", "AUX", "NUL",
+        "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
+        "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"
+    };
+
+    public static string NormalizeFileSystemPath(string path)
+    {
+        if (string.IsNullOrWhiteSpace(path)) return path;
+
+        if (Uri.TryCreate(path, UriKind.Absolute, out var uri) && uri.IsFile)
+            return uri.LocalPath;
+
+        return path;
+    }
+
+    public static string NormalizeFileSystemPath(Uri path)
+    {
+        return path.IsFile ? path.LocalPath : path.ToString();
+    }
+
+    public static bool HasInvalidFileNameChars(string fileName)
+    {
+        if (string.IsNullOrWhiteSpace(fileName)) return true;
+        if (fileName.EndsWith(' ') || fileName.EndsWith('.')) return true;
+        if (fileName.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0) return true;
+        if (fileName.IndexOfAny(WindowsInvalidFileNameChars) >= 0) return true;
+
+        var nameWithoutExtension = Path.GetFileNameWithoutExtension(fileName);
+        foreach (var reservedName in WindowsReservedFileNames)
+        {
+            if (string.Equals(fileName, reservedName, StringComparison.OrdinalIgnoreCase) ||
+                string.Equals(nameWithoutExtension, reservedName, StringComparison.OrdinalIgnoreCase))
+                return true;
+        }
+
+        foreach (var c in fileName)
+        {
+            if (char.IsControl(c)) return true;
+        }
+
+        return false;
+    }
+}