Release v2.15.4

src/data/slides.js

@@ -417,6 +417,24 @@ async function buildTemplateContent(pool, template, body, filesByField, existing
       delete generic.timetable_display_mode;
       delete generic.timetable_max_items;
 
+      generic.date_filter = ['between', 'before', 'after'].includes(generic.date_filter) ? generic.date_filter : 'all';
+      for (const field of ['date_from', 'date_to']) {
+        const value = String(generic[field] || '').trim();
+        const date = value ? new Date(value) : null;
+        const active = generic.date_filter === 'between' || generic.date_filter === (field === 'date_from' ? 'after' : 'before');
+        if (active && date && Number.isNaN(date.getTime())) {
+          const error = new Error('Timetable date range must contain valid date-times.');
+          error.statusCode = 400;
+          throw error;
+        }
+        generic[field] = date && !Number.isNaN(date.getTime()) ? date.toISOString() : '';
+      }
+      if (generic.date_filter === 'between' && generic.date_from && generic.date_to && generic.date_from > generic.date_to) {
+        const error = new Error('Timetable date range must end on or after its start.');
+        error.statusCode = 400;
+        throw error;
+      }
+
       generic.text = normalizedText;
       generic.value = normalizedText;
       generic.type = region.region_type;