Function waitForFile

src/gridfs/download.ts:415–428

(stream: GridFSBucketReadStream, callback: Callback)

}

function waitForFile(stream: GridFSBucketReadStream, callback: Callback): void {
  if (stream.s.file) {
    return callback();
  }

  if (!stream.s.init) {
    init(stream);
    stream.s.init = true;
  }

  stream.once('file', () => {
    callback();
  });
}

function handleStartOption(
  stream: GridFSBucketReadStream,