From 1cd7aa5acfe28f50bee41bd6f4cc8486e6324f4b Mon Sep 17 00:00:00 2001
From: David Perl <david.perl@psi.ch>
Date: Thu, 6 Aug 2026 17:26:09 +0200
Subject: [PATCH] feat: move clean paths util from daq

---
 src/aarecommon/utils/paths.py | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 src/aarecommon/utils/paths.py

diff --git a/src/aarecommon/utils/paths.py b/src/aarecommon/utils/paths.py
new file mode 100644
index 0000000..9dea1f6
--- /dev/null
+++ b/src/aarecommon/utils/paths.py
@@ -0,0 +1,9 @@
+import re
+
+
+def clean_filename(filename: str) -> str:
+    cleaned = re.sub(r"[^A-Za-z0-9._-]", "_", filename.strip())
+    cleaned = cleaned.strip("._-")
+    if not cleaned:
+        raise ValueError("Filename is empty after sanitization.")
+    return cleaned