From a937d34df204888cca51aaf335dcf2ea6b48b833 Mon Sep 17 00:00:00 2001
From: DragonSlayer_14 <dragonslayer14@murena.io>
Date: Thu, 1 Jan 2026 23:19:29 +0100
Subject: [PATCH] =?UTF-8?q?Feat:=20F=C3=BCgt=20eine=20Kasse=20mit=20Funkti?=
 =?UTF-8?q?onen=20f=C3=BCr=20den=20Umgang=20mit=20Datum-Werten?=
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---
 lib/Services/date_service.dart | 45 ++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 lib/Services/date_service.dart

diff --git a/lib/Services/date_service.dart b/lib/Services/date_service.dart
new file mode 100644
index 0000000..4caba1f
--- /dev/null
+++ b/lib/Services/date_service.dart
@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+
+/// Eine Service-Klasse um mit Datums-Werten umzugehen
+class DateService {
+  /// Die Standard-Formatierung von einem Datum
+  static final DateFormat dateFormat = DateFormat('dd.MM.yyyy');
+
+  /// Wandelt einen String in eine DateTimeRange um
+  static DateTimeRange? stringToDateTimeRange(final String? value) {
+    if (value == null || value.trim().isEmpty) {
+      return null;
+    }
+
+    final List<String> parts = value.split(' - ');
+    if (parts.length != 2) {
+      return null;
+    }
+
+    try {
+      final DateTime start = DateService.dateFormat.parseStrict(
+        parts[0].trim(),
+      );
+      final DateTime end = DateService.dateFormat.parseStrict(parts[1].trim());
+
+      if (end.isBefore(start)) {
+        return null;
+      }
+
+      return DateTimeRange(start: start, end: end);
+    } on FormatException catch (_) {
+      return null;
+    }
+  }
+
+  /// Wandelt eine DateTimeRange in einen String um
+  static String? dateTimeRangeToString(final DateTimeRange? value) {
+    if (value != null) {
+      return '${dateFormat.format(value.start)}'
+          ' - '
+          '${dateFormat.format(value.end)}';
+    }
+    return null;
+  }
+}