import { Readable } from 'stream';
import fs from 'fs';

/**
 * Save buffer data to a file.
 * @param {Buffer} buffer - buffer to save to a file.
 * @param {string} filePath - path to a file.
 */
const saveBufferToFile = async (buffer: Buffer, filePath: string): Promise<void> => {
  // Setup readable stream from buffer.
  let streamData = buffer;
  const readStream = new Readable();
  readStream._read = () => {
    readStream.push(streamData);
    streamData = null;
  };
  // Setup file system writable stream.
  return fs.writeFileSync(filePath, buffer);
};

export default saveBufferToFile;