use remoteDb

mobile/lib/db/files_db.dart

@@ -1509,26 +1509,6 @@ class FilesDB with SqlDbBase {
     return result;
   }
 
-  ///Each collectionIDs in list aren't necessarily unique
-  Future<List<int>> getAllCollectionIDsOfFiles(
-    List<int> uploadedFileIDs,
-  ) async {
-    final db = await instance.sqliteAsyncDB;
-    final inParam = uploadedFileIDs.join(',');
-
-    final results = await db.getAll(
-      '''
-      SELECT $columnCollectionID FROM $filesTable
-      WHERE $columnUploadedFileID IN ($inParam) AND $columnCollectionID != -1
-    ''',
-    );
-    final collectionIDsOfFiles = <int>[];
-    for (var result in results) {
-      collectionIDsOfFiles.add(result['collection_id'] as int);
-    }
-    return collectionIDsOfFiles;
-  }
-
   List<EnteFile> convertToFilesForIsolate(Map args) {
     final List<EnteFile> files = [];
     for (final result in args["result"]) {

mobile/lib/db/remote/read/collection_files.dart

@@ -16,4 +16,17 @@ extension CollectionFileRead on RemoteDB {
     );
     return rows.map((row) => row["collection_id"] as int).toSet();
   }
+
+  Future<Map<int, int>> getCollectionIdToFileCount(List<int> file_ids) async {
+    final rows = await sqliteDB.getAll(
+      "SELECT collection_id, COUNT(*) as count FROM collection_files WHERE file_id IN (${file_ids.join(",")}) GROUP BY collection_id",
+    );
+    final Map<int, int> collectionIdToFileCount = {};
+    for (var row in rows) {
+      final collectionId = row["collection_id"] as int;
+      final count = row["count"] as int;
+      collectionIdToFileCount[collectionId] = count;
+    }
+    return collectionIdToFileCount;
+  }
 }

mobile/lib/utils/hierarchical_search_util.dart

@@ -4,6 +4,7 @@ import "package:photos/core/configuration.dart";
 import "package:photos/core/constants.dart";
 import "package:photos/db/files_db.dart";
 import "package:photos/db/ml/db.dart";
+import "package:photos/db/remote/read/collection_files.dart";
 import "package:photos/generated/l10n.dart";
 import "package:photos/models/file/extensions/file_props.dart";
 import "package:photos/models/file/file.dart";
@@ -217,20 +218,13 @@ Future<List<AlbumFilter>> _curateAlbumFilters(
   List<EnteFile> files,
 ) async {
   final albumFilters = <AlbumFilter>[];
-  final idToOccurrence = <int, int>{};
   final uploadedIDs = <int>[];
   for (EnteFile file in files) {
     if (file.uploadedFileID != null && file.uploadedFileID != -1) {
       uploadedIDs.add(file.uploadedFileID!);
     }
   }
-  final collectionIDsOfFiles =
-      await FilesDB.instance.getAllCollectionIDsOfFiles(uploadedIDs);
-
-  for (int collectionID in collectionIDsOfFiles) {
-    idToOccurrence[collectionID] = (idToOccurrence[collectionID] ?? 0) + 1;
-  }
-
+  final idToOccurrence = await remoteDB.getCollectionIdToFileCount(uploadedIDs);
   for (int id in idToOccurrence.keys) {
     final collection = CollectionsService.instance.getCollectionByID(id);
     if (collection == null) {