bacstack/lib/services/read-property-multiple.js

A BACnet protocol stack written in pure JavaScript.

'use strict';

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

module.exports.encode = (buffer, properties) => {
  properties.forEach((value) => {
    baAsn1.encodeReadAccessSpecification(buffer, value);
  });
};

module.exports.decode = (buffer, offset, apduLen) => {
  let len = 0;
  const values = [];
  while ((apduLen - len) > 0) {
    const decodedValue = baAsn1.decodeReadAccessSpecification(buffer, offset + len, apduLen - len);
    if (!decodedValue) return;
    len += decodedValue.len;
    values.push(decodedValue.value);
  }
  return {
    len: len,
    properties: values
  };
};

module.exports.encodeAcknowledge = (buffer, values) => {
  values.forEach((value) => {
    baAsn1.encodeReadAccessResult(buffer, value);
  });
};

module.exports.decodeAcknowledge = (buffer, offset, apduLen) => {
  let len = 0;
  const values = [];
  while ((apduLen - len) > 0) {
    const result = baAsn1.decodeReadAccessResult(buffer, offset + len, apduLen - len);
    if (!result) return;
    len += result.len;
    values.push(result.value);
  }
  return {
    len: len,
    values: values
  };
};