CycloneTechnology/ChaMP

package com.cyclone.ipmi.command.global

import akka.util.ByteString
import com.cyclone.ipmi.codec._

case class DeviceGuid(guid: String)

object DeviceGuid {
  implicit val decoder: Decoder[DeviceGuid] = new Decoder[DeviceGuid] {

    def decode(data: ByteString): DeviceGuid = {
      val iterator = data.iterator
      val is = iterator.asInputStream

      val node1 = is.readByte
      val node2 = is.readByte
      val node3 = is.readByte
      val node4 = is.readByte
      val node5 = is.readByte
      val node6 = is.readByte
      val clockSeqAndReserver = is.read(2).as[Short]
      val timeHighAndVersion = is.read(2).as[Short]
      val timeMid = is.read(2).as[Short]
      val timelow = is.read(4).as[Int]

      DeviceGuid(
        "%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x"
          .format(
            timelow,
            timeMid,
            timeHighAndVersion,
            clockSeqAndReserver,
            node1,
            node2,
            node3,
            node4,
            node5,
            node6
          )
      )
    }
  }
}