Data chunks order

[lusm554]

Rewrite the function to send chunks in the correct order. https://github.com/f1le-transfer/cloud-storage/blob/507128ec31487420bc152ab4ac2c536f94ec7257/block-server/index.js#L94

function transferFile(file) {
  try {
    console.log('[FILE REQUEST]', file)
    const parse = path.parse(file.name)
    fs.promises.readdir(path.join(parse.dir, parse.name))
      .then(chunks => {
        peerConnection.dataChannel.send(JSON.stringify({ len: chunks.length+1 }))
        return chunks
      })
      .then(chunks => {
        chunks.forEach(chunk_name => {
          fs.createReadStream(path.join(parse.dir, parse.name, chunk_name)).on('data', data_chunk => {
            peerConnection.dataChannel.send(data_chunk)
          })
        })
      })
  } catch (error) {
    console.log(error)
  }
}