further refactoring, conversion to stream

lib/helpers/date_helpers.dart

@@ -0,0 +1,3 @@
+import 'package:intl/intl.dart';
+
+final DateFormat dateFormat = DateFormat('yyyy-MM-dd');

lib/helpers/media_helpers.dart

@@ -0,0 +1,13 @@
+import 'package:flutter/material.dart';
+import 'package:sendtrain/database/database.dart';
+
+ImageProvider findMediaByType(List<MediaItem> media, String type) {
+    Iterable<MediaItem>? found = media.where((m) => m.type == MediaType.image);
+
+    if (found.isNotEmpty) {
+      return NetworkImage(found.first.reference);
+    } else {
+      // Element is not found
+      return const AssetImage('assets/images/placeholder.jpg');
+    }
+  }