Remove unsued device_folder and rename file

lib/db/device_files_db.dart

@@ -2,7 +2,7 @@ import 'package:flutter/foundation.dart';
 import 'package:logging/logging.dart';
 import 'package:photo_manager/photo_manager.dart';
 import 'package:photos/db/files_db.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/file.dart';
 import 'package:photos/models/file_load_result.dart';
 import 'package:photos/services/local/local_sync_util.dart';

lib/models/collection_items.dart

@@ -1,5 +1,5 @@
 import 'package:photos/models/collection.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/file.dart';
 
 class CollectionItems {

lib/models/device_folder.dart → lib/models/device_collection.dart

@@ -1,17 +1,5 @@
 import 'package:photos/models/file.dart';
 
-class DeviceFolder {
-  final String name;
-  final String path;
-  final File thumbnail;
-
-  DeviceFolder(
-    this.name,
-    this.path,
-    this.thumbnail,
-  );
-}
-
 class DeviceCollection {
   final String id;
   final String name;

lib/services/remote_sync_service.dart

@@ -15,7 +15,7 @@ import 'package:photos/events/files_updated_event.dart';
 import 'package:photos/events/force_reload_home_gallery_event.dart';
 import 'package:photos/events/local_photos_updated_event.dart';
 import 'package:photos/events/sync_status_update_event.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/file.dart';
 import 'package:photos/models/file_type.dart';
 import 'package:photos/services/app_lifecycle_service.dart';

lib/ui/backup_folder_selection_page.dart

@@ -12,7 +12,7 @@ import 'package:photos/db/device_files_db.dart';
 import 'package:photos/db/files_db.dart';
 import 'package:photos/ente_theme_data.dart';
 import 'package:photos/events/backup_folders_updated_event.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/file.dart';
 import 'package:photos/ui/common/loading_widget.dart';
 import 'package:photos/ui/viewer/file/thumbnail_widget.dart';

lib/ui/collections/device_folder_icon_widget.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/ui/viewer/file/thumbnail_widget.dart';
 import 'package:photos/ui/viewer/gallery/device_folder_page.dart';
 import 'package:photos/utils/navigation_util.dart';

lib/ui/collections/device_folders_grid_view_widget.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/ui/collections/device_folder_icon_widget.dart';
 import 'package:photos/ui/viewer/gallery/empte_state.dart';
 

lib/ui/collections_gallery_widget.dart

@@ -12,7 +12,7 @@ import 'package:photos/events/collection_updated_event.dart';
 import 'package:photos/events/local_photos_updated_event.dart';
 import 'package:photos/events/user_logged_out_event.dart';
 import 'package:photos/models/collection_items.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/services/collections_service.dart';
 import 'package:photos/ui/collections/device_folders_grid_view_widget.dart';
 import 'package:photos/ui/collections/ente_section_title.dart';
@@ -91,18 +91,8 @@ class _CollectionsGalleryWidgetState extends State<CollectionsGalleryWidget>
     final filesDB = FilesDB.instance;
     final collectionsService = CollectionsService.instance;
     final userID = Configuration.instance.getUserID();
-    final List<DeviceFolder> folders = [];
     final List<DeviceCollection> deviceCollections =
         await filesDB.getDeviceCollections(includeCoverThumbnail: true);
-    final latestLocalFiles = await filesDB.getLatestLocalFiles();
-    for (final file in latestLocalFiles) {
-      folders.add(DeviceFolder(file.deviceFolder, file.deviceFolder, file));
-    }
-    folders.sort(
-      (first, second) =>
-          second.thumbnail.creationTime.compareTo(first.thumbnail.creationTime),
-    );
-
     final List<CollectionWithThumbnail> collectionsWithThumbnail = [];
     final latestCollectionFiles =
         await collectionsService.getLatestCollectionFiles();

lib/ui/sharing/share_collection_widget.dart

@@ -14,7 +14,7 @@ import 'package:photos/db/public_keys_db.dart';
 import 'package:photos/ente_theme_data.dart';
 import 'package:photos/events/backup_folders_updated_event.dart';
 import 'package:photos/models/collection.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/public_key.dart';
 import 'package:photos/services/collections_service.dart';
 import 'package:photos/services/feature_flag_service.dart';

lib/ui/viewer/gallery/device_folder_page.dart

@@ -7,7 +7,7 @@ import 'package:photos/ente_theme_data.dart';
 import 'package:photos/events/backup_folders_updated_event.dart';
 import 'package:photos/events/files_updated_event.dart';
 import 'package:photos/events/local_photos_updated_event.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/gallery_type.dart';
 import 'package:photos/models/selected_files.dart';
 import 'package:photos/ui/viewer/gallery/gallery.dart';

lib/ui/viewer/gallery/gallery_app_bar_widget.dart

@@ -8,7 +8,7 @@ import 'package:photos/db/files_db.dart';
 import 'package:photos/ente_theme_data.dart';
 import 'package:photos/events/subscription_purchased_event.dart';
 import 'package:photos/models/collection.dart';
-import 'package:photos/models/device_folder.dart';
+import 'package:photos/models/device_collection.dart';
 import 'package:photos/models/gallery_type.dart';
 import 'package:photos/models/magic_metadata.dart';
 import 'package:photos/models/selected_files.dart';