validateSaveAsInput method

void validateSaveAsInput({ SaveInput? input, required String fileName, required FileType fileType, })

Throws InvalidInputException for input that saveAs (or, with a null input, openWriteAs) rejects. FileSaver.saveAs and FileSaver.openWriteAs call it before the directory picker opens, so that the user isn't asked for a directory the save then can't use.

Implementation

void validateSaveAsInput({
  SaveInput? input,
  required String fileName,
  required FileType fileType,
}) {
  switch (input) {
    case SaveBytesInput(:final fileBytes):
      validateBytesInput(fileBytes, fileName);
    case SaveFileInput(:final filePath):
      validateFilePathInput(filePath, fileName);
    case SaveNetworkInput(:final url):
      validateNetworkInput(url, fileName);
    case null:
      if (fileName.isEmpty) {
        throw const InvalidInputException('File name cannot be empty');
      }
  }
}