kafkajs/src/protocol/requests/produce/v3/response.js

A modern Apache Kafka client for node.js

const Decoder = require('../../../decoder')
const { failure, createErrorFromCode } = require('../../../error')

/**
 * Produce Response (Version: 3) => [responses] throttle_time_ms
 *   responses => topic [partition_responses]
 *     topic => STRING
 *     partition_responses => partition error_code base_offset log_append_time
 *       partition => INT32
 *       error_code => INT16
 *       base_offset => INT64
 *       log_append_time => INT64
 *   throttle_time_ms => INT32
 */

const partition = decoder => ({
  partition: decoder.readInt32(),
  errorCode: decoder.readInt16(),
  baseOffset: decoder.readInt64().toString(),
  logAppendTime: decoder.readInt64().toString(),
})

const decode = async rawData => {
  const decoder = new Decoder(rawData)
  const topics = decoder.readArray(decoder => ({
    topicName: decoder.readString(),
    partitions: decoder.readArray(partition),
  }))

  const throttleTime = decoder.readInt32()

  return {
    topics,
    throttleTime,
  }
}

const parse = async data => {
  const errors = data.topics.flatMap(response => {
    return response.partitions.filter(partition => failure(partition.errorCode))
  })

  if (errors.length > 0) {
    const { errorCode } = errors[0]
    throw createErrorFromCode(errorCode)
  }

  return data
}

module.exports = {
  decode,
  parse,
}