dlms-protocol/lib/typesDLMS/DlmsUint16.js

DLMS Protocol parser for JavaScript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
require("core-js/modules/es.array-buffer.constructor.js");
require("core-js/modules/es.array-buffer.slice.js");
require("core-js/modules/es.typed-array.uint8-array.js");
require("core-js/modules/es.typed-array.fill.js");
require("core-js/modules/es.typed-array.set.js");
require("core-js/modules/es.typed-array.sort.js");
require("core-js/modules/es.typed-array.to-locale-string.js");
require("core-js/modules/web.dom-collections.iterator.js");
var _DlmsDataType = _interopRequireDefault(require("../enum/DlmsDataType"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
class DlmsUint16 {
  constructor() {
    let data = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
    this.tag = _DlmsDataType.default.UINT16;
    this.totalBytes = 0;
    this.rawValue = [];
    this.bodyBytes = [];
    this.value = 0;
    if (data) {
      if (Array.isArray(data)) {
        this.insertData(data);
      } else {
        this.insertDataFromValue(data);
      }
    }
  }
  getStandardLength() {
    return 3;
  }
  getValue() {
    return this.value;
  }
  insertData(data) {
    if (this.tag !== data[0]) {
      throw new Error("Tag mismatch.");
    }
    this.bodyBytes = [data[1], data[2]];
    this.value = this._toUint16(this.bodyBytes);
    this.rawValue = [this.tag, ...this.bodyBytes];
    this.totalBytes = this.rawValue.length;
  }
  insertDataFromValue(value) {
    this.value = value;
    this.bodyBytes = this._fromUint16(value);
    this.rawValue = [this.tag, ...this.bodyBytes];
    this.totalBytes = this.rawValue.length;
  }
  _toUint16(bytes) {
    const buffer = new Uint8Array(bytes);
    const dataView = new DataView(buffer.buffer);
    return dataView.getUint16(0, false); // Big-endian
  }
  _fromUint16(value) {
    const buffer = new ArrayBuffer(2);
    const dataView = new DataView(buffer);
    dataView.setUint16(0, value, false); // Big-endian
    return Array.from(new Uint8Array(buffer));
  }
}
exports.default = DlmsUint16;