How to parse CRC16Modus module from js to NODE?

Question

Node.js

I found such a site ( https://www.tahapaksu.com/crc/ ) there is a good example of calculating the checksum using CRC16Modus, there is an example ( https://www.tahapaksu.com/crc/js/crcmaster.js ), but I can't figure out how to run it in node. It seems that I remove all the jQuery code, but I can’t figure out where to put the hex string in the object.

Who has the power of the Jedi, help pliz!

Answer 1

I did it, maybe someone will need it

spoiler

/**
 * crc16Modus
 * @class crc16MODBUS
 */

'use strict';

class crc16MODBUS {

    constructor() {

        this.CRCMaster = {
            StringToCheck: "",
            CleanedString: "",
        
            CleanString: function(inputType) {
                if (inputType == "ASCII") {
                    this.CleanedString = this.StringToCheck;
                } else {
                    if (this.StringToCheck.match(/^[0-9A-F \t]+$/gi) !== null) {
                        this.CleanedString = this._hexStringToString(this.StringToCheck.toUpperCase().replace(/[\t ]/g, ''));
                    } else {
                        console.log("String doesn't seem to be a valid Hex input.");
                        return false;
                    }
                }
                return true;
            },
        
            CRC16Modbus: function() {
                var crc = 0xFFFF;
                var str = this.CleanedString;
                for (var pos = 0; pos < str.length; pos++) {
                    crc ^= str.charCodeAt(pos);
                    for (var i = 8; i !== 0; i--) {
                        if ((crc & 0x0001) !== 0) {
                            crc >>= 1;
                            crc ^= 0xA001;
                        } else
                            crc >>= 1;
                    }
                }
                return crc;
            },
        
            _hexStringToString: function(inputstr) {
                var hex = inputstr.toString(); //force conversion
                var str = '';
                for (var i = 0; i < hex.length; i += 2)
                    str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
                return str;
            },
        
            Calculate: function(str, inputType) {
                this.StringToCheck = str;
                if (this.CleanString(inputType)) {
        
                  return this.CRC16Modbus().toString(16).toUpperCase()
        
                }
            }
        };

    }

    /**
     * Расчет контрольной суммы
     * @method transformationCRC16
     */
    transformationCRC16( str ) {

        return this.CRCMaster.Calculate( str, 'HEX' )

    }
    
}

module.exports = crc16MODBUS