@widesky/node-bacstack/lib/services/i-have.js

The BACnet protocol library written in pure JavaScript.

'use strict';

const baAsn1      = require('../asn1');
const baEnum      = require('../enum');

module.exports.encode = (buffer, deviceId, objectId, objectName) => {
  baAsn1.encodeApplicationObjectId(buffer, deviceId.type, deviceId.instance);
  baAsn1.encodeApplicationObjectId(buffer, objectId.type, objectId.instance);
  baAsn1.encodeApplicationCharacterString(buffer, objectName);
};

module.exports.decode = (buffer, offset, apduLen) => {
  let len = 0;
  let result;
  let decodedValue;
  let value = {};
  result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
  len += result.len;
  decodedValue = baAsn1.decodeObjectId(buffer, offset + len);
  len += decodedValue.len;
  value.deviceId = {type: decodedValue.objectType, instance: decodedValue.instance};
  result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
  len += result.len;
  decodedValue = baAsn1.decodeObjectId(buffer, offset + len);
  len += decodedValue.len;
  value.objectId = {type: decodedValue.objectType, instance: decodedValue.instance};
  result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
  len += result.len;
  decodedValue = baAsn1.decodeCharacterString(buffer, offset + len, apduLen - (offset + len), result.value);
  len += decodedValue.len;
  value.objectName = decodedValue.value;
  value.len = len;
  return value;
};