checkFilesExist method

Future<List<String>> checkFilesExist({ required List<String> filePaths, String assetPath = 'assets', FileExistenceFilter filter = FileExistenceFilter.both, })

Checks for existence of files in local storage

Implementation

Future<List<String>> checkFilesExist({
  required List<String> filePaths,
  String assetPath = 'assets',
  FileExistenceFilter filter = FileExistenceFilter.both,
}) async {
  final dir = await getApplicationDocumentsDirectory();
  final basePath = dir.path;

  final results = await Future.wait(
    filePaths.map((path) async {
      final fullPath = p.join(basePath, assetPath, path);
      final exists = await File(fullPath).exists();
      return (path, exists);
    }),
  );

  switch (filter) {
    case FileExistenceFilter.onlyExisting:
      return results.where((e) => e.$2).map((e) => e.$1).toList();
    case FileExistenceFilter.onlyNonExisting:
      return results.where((e) => !e.$2).map((e) => e.$1).toList();
    case FileExistenceFilter.both:
      return filePaths;
  }
}