listKeys method

@override Future<List<String>> listKeys()

Lists all available snapshot keys.

Returns: A Future that completes with a list of available snapshot keys.

Implementation

@override
Future<List<String>> listKeys() async {
  await _ensureDirectory();

  if (!await directory.exists()) {
    return [];
  }

  try {
    final files =
        directory
            .listSync()
            .whereType<File>()
            .where((file) => file.path.endsWith('.json'))
            .map((file) {
              final fileName = file.path.split('/').last;
              return fileName.replaceAll('.json', '');
            })
            .toList()
          ..sort();
    return files;
  } catch (e) {
    debugPrint('[Checkpoint] Error listing snapshot keys: $e');
    return [];
  }
}