[mob] Refactor groupHeader to use groupType

mobile/lib/ui/viewer/gallery/component/group/group_header_widget.dart

@@ -1,16 +1,15 @@
 import "package:flutter/cupertino.dart";
-import "package:intl/intl.dart";
 import 'package:photos/core/constants.dart';
 import "package:photos/generated/l10n.dart";
 import "package:photos/theme/ente_theme.dart";
 
 class GroupHeaderWidget extends StatelessWidget {
-  final int timestamp;
+  final String title;
   final int gridSize;
 
   const GroupHeaderWidget({
     super.key,
-    required this.timestamp,
+    required this.title,
     required this.gridSize,
   });
 
@@ -22,7 +21,7 @@ class GroupHeaderWidget extends StatelessWidget {
         gridSize < photoGridSizeMax ? textTheme.body : textTheme.small;
     final double horizontalPadding = gridSize < photoGridSizeMax ? 12.0 : 8.0;
     final double verticalPadding = gridSize < photoGridSizeMax ? 12.0 : 14.0;
-    final String dayTitle = _getDayTitle(context, timestamp);
+
     return Padding(
       padding: EdgeInsets.symmetric(
         horizontal: horizontalPadding,
@@ -31,33 +30,12 @@ class GroupHeaderWidget extends StatelessWidget {
       child: Container(
         alignment: Alignment.centerLeft,
         child: Text(
-          dayTitle,
-          style: (dayTitle == S.of(context).dayToday)
+          title,
+          style: (title == S.of(context).dayToday)
               ? textStyle
               : textStyle.copyWith(color: colorScheme.textMuted),
         ),
       ),
     );
   }
-
-  String _getDayTitle(BuildContext context, int timestamp) {
-    final date = DateTime.fromMicrosecondsSinceEpoch(timestamp);
-    final now = DateTime.now();
-
-    if (date.year == now.year && date.month == now.month) {
-      if (date.day == now.day) {
-        return S.of(context).dayToday;
-      } else if (date.day == now.day - 1) {
-        return S.of(context).dayYesterday;
-      }
-    }
-
-    if (date.year != DateTime.now().year) {
-      return DateFormat.yMMMEd(Localizations.localeOf(context).languageCode)
-          .format(date);
-    } else {
-      return DateFormat.MMMEd(Localizations.localeOf(context).languageCode)
-          .format(date);
-    }
-  }
 }

mobile/lib/ui/viewer/gallery/component/group/lazy_group_gallery.dart

@@ -11,6 +11,7 @@ import 'package:photos/theme/ente_theme.dart';
 import "package:photos/ui/viewer/gallery/component/grid/place_holder_grid_view_widget.dart";
 import "package:photos/ui/viewer/gallery/component/group/group_gallery.dart";
 import "package:photos/ui/viewer/gallery/component/group/group_header_widget.dart";
+import "package:photos/ui/viewer/gallery/component/group/type.dart";
 import 'package:photos/ui/viewer/gallery/gallery.dart';
 import "package:photos/ui/viewer/gallery/state/gallery_context_state.dart";
 
@@ -178,6 +179,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
     if (_filesInGroup.isEmpty) {
       return const SizedBox.shrink();
     }
+    final groupType = GalleryContextState.of(context)!.type;
     return Column(
       children: [
         Row(
@@ -185,7 +187,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
           children: [
             if (widget.enableFileGrouping)
               GroupHeaderWidget(
-                timestamp: _filesInGroup[0].creationTime!,
+                title: groupType.getTitle(context, _filesInGroup[0]),
                 gridSize: widget.photoGridSize,
               ),
             Expanded(child: Container()),