@signalk/n2k-signalk/mmsi-context.js

NMEA 2000 to SignalK conversion library

module.exports.getMmsiContext = function (n2k) {
  return typeof n2k.fields.userId !== 'undefined'
    ? 'vessels.urn:mrn:imo:mmsi:' + n2k.fields.userId
    : 'vessels.unknown'
}

function padUserID (n2k) {
  let id = n2k.fields.userId
  if (typeof id !== 'undefined') {
    id = id.toString()
    return id != '0' ? id.padStart(9, '0') : id
  }
}

module.exports.padUserID = padUserID