@kumologica/kumologica-contrib-base64/lib/base64.js

Node that encodes and decodes base64 string

module.exports = function (App) {
  const { KLNode } = require('@kumologica/devkit');
  class Base64Error extends Error {
    constructor(error) {
      super(error);
      if (error) {
        this.name = error.name;
        this.message = error.message;
      }
    }
  }
  class Base64 extends KLNode {
    constructor(props) {
      super(App, props);
      this.operation = props.operation;
      this.property = props.property;
      this.propertytype = props.propertyType;
    }

    handle(msg) {
      if (this.operation === 'Encode') {
        try {
          let stringtoencode = App.util.evaluateDynamicField(
            this.property,
            msg,
            this
          );
          let endcodedString = Buffer.from(stringtoencode).toString('base64');
          msg.base64 = { encodedstring: endcodedString };
          this.send(msg);
        } catch (error) {
          error.name = "Base64 Encoding Failed";
          this.sendError(error,msg);
          throw error;
        }
      } else {
        try {
          let stringtodecode = App.util.evaluateDynamicField(
            this.property,
            msg,
            this
          );
          let decodedString = Buffer.from(stringtodecode, 'base64').toString(
            'ascii'
          );
          msg.base64 = { decodedstring: decodedString };
          this.send(msg);
        } catch (error) {
          error.name = "Base64 Decoding Failed";
          this.sendError(new Base64Error(error),msg);
          throw error;
        }
      }
    }
  }
  App.nodes.registerType('Base64', Base64);
};