awsUploader-with-alg.ts

export class AWSS3Uploader implements IUploader {
  private s3: AWS.S3;
  public config: S3UploadConfig;

  ...

  private createDestinationFilePath(
    fileName: string,
    mimetype: string,
    encoding: string
  ): string {
    return fileName;
  }

  async singleFileUploadResolver(
    parent,
    { file }: { file: Promise<ApolloServerFileUploads.File> }
  ): Promise<ApolloServerFileUploads.UploadedFileResponse> {
    const { stream, filename, mimetype, encoding } = await file;

    // Create the destination file path
    const filePath = this.createDestinationFilePath(
      filename,
      mimetype,
      encoding
    );

    // Create an upload stream that goes to S3
    // Pipe the file data into the upload stream
    // Get the link representing the uploaded file
    // (optional) save it to our database

    return { filename, mimetype, encoding, url: '' };
  }
}