listFiles method

Implementation

@override
Future<List<CloudFile>> listFiles(
    {String path = '', bool recursive = false}) {
  return _executeRequest(() async {
    final folder = await _getFolderByPath(path);
    if (folder == null || folder.id == null) {
      return []; // Return empty list if path does not exist.
    }
    final List<CloudFile> cloudFiles = [];
    String? pageToken;
    // Loop to handle paginated results from the Drive API.
    do {
      final fileList = await driveApi.files.list(
        spaces: MultiCloudStorage.cloudAccess == CloudAccessType.appStorage
            ? 'appDataFolder'
            : 'drive',
        q: "'${folder.id}' in parents and trashed = false",
        $fields:
            'nextPageToken, files(id, name, size, modifiedTime, mimeType, parents)',
        pageToken: pageToken,
      );
      if (fileList.files != null) {
        for (final file in fileList.files!) {
          String currentItemPath = join(path, file.name ?? '');
          if (path == '/' || path.isEmpty) currentItemPath = file.name ?? '';
          // Convert Google Drive file object to a generic CloudFile.
          cloudFiles.add(CloudFile(
            path: currentItemPath,
            name: file.name ?? 'Unnamed',
            size: file.size == null ? null : int.tryParse(file.size!),
            modifiedTime: file.modifiedTime ?? DateTime.now(),
            isDirectory:
                file.mimeType == 'application/vnd.google-apps.folder',
            metadata: {
              'id': file.id,
              'mimeType': file.mimeType,
              'parents': file.parents
            },
          ));
        }
      }
      pageToken = fileList.nextPageToken;
    } while (pageToken != null);
    // If recursive is true, fetch files from all subdirectories.
    if (recursive) {
      final List<CloudFile> subFolderFiles = [];
      for (final cf in cloudFiles) {
        if (cf.isDirectory) {
          subFolderFiles
              .addAll(await listFiles(path: cf.path, recursive: true));
        }
      }
      cloudFiles.addAll(subFolderFiles);
    }
    return cloudFiles;
  });
}