From 37aa63ff281e7d428f101f0571b9e7942cf86b37 Mon Sep 17 00:00:00 2001
From: Marcus Fihlon <marcus@fihlon.swiss>
Date: Thu, 30 Apr 2026 10:14:18 +0200
Subject: [PATCH] fix: handle missing timezone in activity title generation

Default title generation could fail when parsed activity data had no timezone set. This change adds a null/blank fallback in `ActivityFormatter` so titles can still be generated without throwing a `NullPointerException`.

Signed-off-by: Marcus Fihlon <marcus@fihlon.swiss>
---
 .../java/net/javahippie/fitpub/util/ActivityFormatter.java    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/net/javahippie/fitpub/util/ActivityFormatter.java b/src/main/java/net/javahippie/fitpub/util/ActivityFormatter.java
index 26e4f32..0b32b3d 100644
--- a/src/main/java/net/javahippie/fitpub/util/ActivityFormatter.java
+++ b/src/main/java/net/javahippie/fitpub/util/ActivityFormatter.java
@@ -98,6 +98,10 @@ public class ActivityFormatter {
      *
      */
     private static LocalDateTime getUtcDateTimeInZone(LocalDateTime utcDateTime, String timezone) {
+        if (timezone == null || timezone.isBlank()) {
+            return utcDateTime;
+        }
+
         try {
             return utcDateTime.atZone(ZoneOffset.UTC)
                     .withZoneSameInstant(ZoneId.of(timezone))