Sort albums in the order in which they were updated

lib/db/files_db.dart

@@ -325,6 +325,22 @@ class FilesDB {
     }
   }
 
+  Future<File> getLastModifiedFileInCollection(int collectionID) async {
+    final db = await instance.database;
+    final rows = await db.query(
+      table,
+      where: '$columnCollectionID =?',
+      whereArgs: [collectionID],
+      orderBy: '$columnUpdationTime DESC',
+      limit: 1,
+    );
+    if (rows.isNotEmpty) {
+      return _getFileFromRow(rows[0]);
+    } else {
+      return null;
+    }
+  }
+
   List<File> _convertToFiles(List<Map<String, dynamic>> results) {
     final files = List<File>();
     for (final result in results) {

lib/models/collection_items.dart

@@ -12,6 +12,11 @@ class CollectionItems {
 class CollectionWithThumbnail {
   final Collection collection;
   final File thumbnail;
+  final File lastUpdatedFile;
 
-  CollectionWithThumbnail(this.collection, this.thumbnail);
+  CollectionWithThumbnail(
+    this.collection,
+    this.thumbnail,
+    this.lastUpdatedFile,
+  );
 }

lib/ui/collections_gallery_widget.dart

@@ -131,21 +131,36 @@ class _CollectionsGalleryWidgetState extends State<CollectionsGalleryWidget> {
       return second.creationTime.compareTo(first.creationTime);
     });
     if (favorites.length > 0) {
+      final favoritesCollection =
+          await FavoritesService.instance.getFavoritesCollection();
+      final lastUpdatedFile = await FilesDB.instance
+          .getLastModifiedFileInCollection(favoritesCollection.id);
       collectionsWithThumbnail.add(CollectionWithThumbnail(
-          await FavoritesService.instance.getFavoritesCollection(),
-          favorites[0]));
+          favoritesCollection, favorites[0], lastUpdatedFile));
     }
     final collections = CollectionsService.instance.getCollections();
+
     for (final c in collections) {
       if (c.ownerID != Configuration.instance.getUserID()) {
         continue;
       }
-      var thumbnail = await FilesDB.instance.getLatestFileInCollection(c.id);
+      final thumbnail = await FilesDB.instance.getLatestFileInCollection(c.id);
       if (thumbnail == null) {
         continue;
       }
-      collectionsWithThumbnail.add(CollectionWithThumbnail(c, thumbnail));
+      final lastUpdatedFile =
+          await FilesDB.instance.getLastModifiedFileInCollection(c.id);
+      collectionsWithThumbnail.add(CollectionWithThumbnail(
+        c,
+        thumbnail,
+        lastUpdatedFile,
+      ));
     }
+    collectionsWithThumbnail.sort((first, second) {
+      return second.lastUpdatedFile.updationTime
+          .compareTo(first.lastUpdatedFile.updationTime);
+    });
+
     return CollectionItems(folders, collectionsWithThumbnail);
   }
 

lib/ui/create_collection_page.dart

@@ -153,8 +153,18 @@ class _CreateCollectionPageState extends State<CreateCollectionPage> {
       if (thumbnail == null) {
         continue;
       }
-      collectionsWithThumbnail.add(CollectionWithThumbnail(c, thumbnail));
+      final lastUpdatedFile =
+          await FilesDB.instance.getLastModifiedFileInCollection(c.id);
+      collectionsWithThumbnail.add(CollectionWithThumbnail(
+        c,
+        thumbnail,
+        lastUpdatedFile,
+      ));
     }
+    collectionsWithThumbnail.sort((first, second) {
+      return second.lastUpdatedFile.updationTime
+          .compareTo(first.lastUpdatedFile.updationTime);
+    });
     return collectionsWithThumbnail;
   }
 

lib/ui/shared_collections_gallery.dart

@@ -46,15 +46,23 @@ class _SharedCollectionGalleryState extends State<SharedCollectionGallery> {
           if (collection.ownerID == Configuration.instance.getUserID()) {
             continue;
           }
-          var thumbnail;
-          try {
-            thumbnail =
-                await FilesDB.instance.getLatestFileInCollection(collection.id);
-          } catch (e) {
-            _logger.warning(e.toString());
+          final thumbnail =
+              await FilesDB.instance.getLatestFileInCollection(collection.id);
+          if (thumbnail == null) {
+            continue;
           }
-          c.add(CollectionWithThumbnail(collection, thumbnail));
+          final lastUpdatedFile = await FilesDB.instance
+              .getLastModifiedFileInCollection(collection.id);
+          c.add(CollectionWithThumbnail(
+            collection,
+            thumbnail,
+            lastUpdatedFile,
+          ));
         }
+        c.sort((first, second) {
+          return second.lastUpdatedFile.updationTime
+              .compareTo(first.lastUpdatedFile.updationTime);
+        });
         return c;
       }),
       builder: (context, snapshot) {