pickFileJSON function
Implementation
Future<String?> pickFileJSON(BuildContext context) async {
// if (presentationOrMockTest) {
// return 'https://'; //TODO:
// }
String? path = await FilesystemPicker.open(
title: 'Выберите TXT файл',
context: context,
rootDirectory: Directory(pathStorage),
fsType: FilesystemType.file,
allowedExtensions: ['.txt'],
fileTileSelectMode: FileTileSelectMode.wholeTile,
);
return path;
}