From edbe30e82bbd8e64c60fd2c2197eb04879e541c2 Mon Sep 17 00:00:00 2001
From: KoenigMjr <135820716+KoenigMjr@users.noreply.github.com>
Date: Wed, 1 Jul 2026 12:34:03 +0200
Subject: [PATCH] [bugfix/descriptor] allow empty string replacements in
 descriptor module

The descriptor module previously used a truthy check (`if description:`) to determine whether a matching description was found. In Python, an empty string (`""`) evaluates to False, causing the module to incorrectly fall back to the default `scan_value` when an empty replacement string was explicitly defined (e.g., in a fallback regex catch-all `.*,,true`).

Switched the conditional check to `if description is not None:` to properly differentiate between a missing match (`None`) and an intentional empty replacement string (`""`). This ensures catch-all fallback entries in CSVs can clear fields as intended.
---
 module/descriptor.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/module/descriptor.py b/module/descriptor.py
index eeda938c..296af9d2 100644
--- a/module/descriptor.py
+++ b/module/descriptor.py
@@ -10,7 +10,7 @@
                      by Bastian Schroll
 
 @file:        descriptor.py
-@date:        03.12.2025
+@date:        01.07.2026
 @author:      Bastian Schroll
 @description: Module to add descriptions to bwPackets with CSV and Regex support
 """
@@ -207,7 +207,7 @@ def doWork(self, bwPacket):
             # Search for matching description in unified cache
             description = self._find_description(descriptor_key, scan_value, bwPacket)
 
-            if description:
+            if description is not None:
                 bwPacket.set(descr_field, description)
                 logging.info("Description set: '%s' -> '%s'", scan_value, description)
             else: