@halsystems/red-bacnet/ext/node-bacstack/dist/lib/services/read-property.js

NodeRED BACnet IP client

'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
exports.decodeAcknowledge = exports.encodeAcknowledge = exports.decode = exports.encode = void 0;
const baAsn1 = require("../asn1");
const baEnum = require("../enum");
const encode = (buffer, objectType, objectInstance, propertyId, arrayIndex) => {
    if (objectType <= baEnum.ASN1_MAX_OBJECT) {
        baAsn1.encodeContextObjectId(buffer, 0, objectType, objectInstance);
    }
    if (propertyId <= baEnum.ASN1_MAX_PROPERTY_ID) {
        baAsn1.encodeContextEnumerated(buffer, 1, propertyId);
    }
    if (arrayIndex !== baEnum.ASN1_ARRAY_ALL) {
        baAsn1.encodeContextUnsigned(buffer, 2, arrayIndex || baEnum.ASN1_ARRAY_ALL);
    }
};
exports.encode = encode;
const decode = (buffer, offset, apduLen) => {
    let len = 0;
    let result;
    let decodedValue;
    if (apduLen < 7)
        return;
    if (!baAsn1.decodeIsContextTag(buffer, offset + len, 0))
        return;
    len++;
    decodedValue = baAsn1.decodeObjectId(buffer, offset + len);
    len += decodedValue.len;
    const objectId = { type: decodedValue.objectType, instance: decodedValue.instance };
    const property = {};
    result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
    len += result.len;
    if (result.tagNumber !== 1)
        return;
    decodedValue = baAsn1.decodeEnumerated(buffer, offset + len, result.value);
    len += decodedValue.len;
    property.id = decodedValue.value;
    property.index = baEnum.ASN1_ARRAY_ALL;
    if (len < apduLen) {
        result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
        len += result.len;
        if ((result.tagNumber === 2) && (len < apduLen)) {
            decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
            len += decodedValue.len;
            property.index = decodedValue.value;
        }
        else {
            return;
        }
    }
    if (len < apduLen)
        return;
    return {
        len: len,
        objectId: objectId,
        property: property
    };
};
exports.decode = decode;
const encodeAcknowledge = (buffer, objectId, propertyId, arrayIndex, values) => {
    baAsn1.encodeContextObjectId(buffer, 0, objectId.type, objectId.instance);
    baAsn1.encodeContextEnumerated(buffer, 1, propertyId);
    if (arrayIndex !== baEnum.ASN1_ARRAY_ALL) {
        baAsn1.encodeContextUnsigned(buffer, 2, arrayIndex);
    }
    baAsn1.encodeOpeningTag(buffer, 3);
    values.forEach((value) => baAsn1.bacappEncodeApplicationData(buffer, value));
    baAsn1.encodeClosingTag(buffer, 3);
};
exports.encodeAcknowledge = encodeAcknowledge;
const decodeAcknowledge = (buffer, offset, apduLen) => {
    let result;
    let decodedValue;
    const objectId = {};
    const property = {};
    if (!baAsn1.decodeIsContextTag(buffer, offset, 0))
        return;
    let len = 1;
    result = baAsn1.decodeObjectId(buffer, offset + len);
    len += result.len;
    objectId.type = result.objectType;
    objectId.instance = result.instance;
    result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
    len += result.len;
    if (result.tagNumber !== 1)
        return;
    result = baAsn1.decodeEnumerated(buffer, offset + len, result.value);
    len += result.len;
    property.id = result.value;
    result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
    if (result.tagNumber === 2) {
        len += result.len;
        decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
        len += decodedValue.len;
        property.index = decodedValue.value;
    }
    else {
        property.index = baEnum.ASN1_ARRAY_ALL;
    }
    const values = [];
    if (!baAsn1.decodeIsOpeningTagNumber(buffer, offset + len, 3))
        return;
    len++;
    while ((apduLen - len) > 1) {
        result = baAsn1.bacappDecodeApplicationData(buffer, offset + len, apduLen + offset, objectId.type, property.id);
        if (!result)
            return;
        len += result.len;
        delete result.len;
        values.push(result);
    }
    if (!baAsn1.decodeIsClosingTagNumber(buffer, offset + len, 3))
        return;
    len++;
    return {
        len: len,
        objectId: objectId,
        property: property,
        values: values
    };
};
exports.decodeAcknowledge = decodeAcknowledge;