ts-bacnet/lib/services/read-property.js

The BACnet protocol library written in pure JavaScript.

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.decodeAcknowledge = exports.encodeAcknowledge = exports.decode = exports.encode = void 0;
const baAsn1 = __importStar(require("../asn1"));
const baEnum = __importStar(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 || arrayIndex === 0 ? arrayIndex : baEnum.ASN1_ARRAY_ALL);
    }
};
exports.encode = encode;
const decode = (buffer, offset, apduLen) => {
    let len = 0;
    let result;
    let decodedValue;
    if (apduLen < 7) {
        return undefined;
    }
    if (!baAsn1.decodeIsContextTag(buffer, offset + len, 0)) {
        return undefined;
    }
    len++;
    decodedValue = baAsn1.decodeObjectId(buffer, offset + len);
    len += decodedValue.len;
    let objectId = {
        type: decodedValue.objectType,
        instance: decodedValue.instance,
    };
    let property = {};
    result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
    len += result.len;
    if (result.tagNumber !== 1) {
        return undefined;
    }
    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 undefined;
        }
    }
    if (len < apduLen) {
        return undefined;
    }
    return {
        len,
        objectId,
        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;
    let objectId = {};
    let property = {};
    if (!baAsn1.decodeIsContextTag(buffer, offset, 0)) {
        return undefined;
    }
    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 undefined;
    }
    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 undefined;
    }
    len++;
    while (apduLen - len > 1) {
        result = baAsn1.bacappDecodeApplicationData(buffer, offset + len, apduLen + offset, objectId.type, property.id);
        if (!result) {
            return undefined;
        }
        len += result.len;
        delete result.len;
        values.push(result);
    }
    if (!baAsn1.decodeIsClosingTagNumber(buffer, offset + len, 3)) {
        return undefined;
    }
    len++;
    return {
        len,
        objectId,
        property,
        values,
    };
};
exports.decodeAcknowledge = decodeAcknowledge;