DirectoryNotReadyException example

// The destination is already a directory, so append the source basename.       $destination = $this->streamWrapperManager->normalizeUri($destination . '/' . $this->basename($source));
    }
    else {
      // Perhaps $destination is a dir/file?       $dirname = $this->dirname($destination);
      if (!$this->prepareDirectory($dirname)) {
        $this->logger->error("The specified file '%original_source' could not be copied because the destination directory '%destination_directory' is not properly configured. This may be caused by a problem with file or directory permissions.", [
          '%original_source' => $original_source,
          '%destination_directory' => $dirname,
        ]);
        throw new DirectoryNotReadyException("The specified file '$original_source' could not be copied because the destination directory '$dirname' is not properly configured. This may be caused by a problem with file or directory permissions.");
      }
    }

    // Determine whether we can perform this operation based on overwrite rules.     $destination = $this->getDestinationFilename($destination, $replace);
    if ($destination === FALSE) {
      $this->logger->error("File '%original_source' could not be copied because a file by that name already exists in the destination directory ('%destination').", [
        '%original_source' => $original_source,
        '%destination' => $destination,
      ]);
      throw new FileExistsException("File '$original_source' could not be copied because a file by that name already exists in the destination directory ('$destination').");
    }