cnf-barcode/src/lib/barcodes/pharmacode/index.js

a barcode generator

// Encoding documentation
// http://www.gomaro.ch/ftproot/Laetus_PHARMA-CODE.pdf

import Barcode from "../Barcode.js";

class pharmacode extends Barcode {
  constructor(data, options) {
    super(data, options);
    this.number = parseInt(data, 10);
  }

  encode() {
    let z = this.number;
    let result = "";

    // http://i.imgur.com/RMm4UDJ.png
    // (source: http://www.gomaro.ch/ftproot/Laetus_PHARMA-CODE.pdf, page: 34)
    while (!isNaN(z) && z != 0) {
      if (z % 2 === 0) { // Even
        result = `11100${result}`;
        z = (z - 2) / 2;
      } else { // Odd
        result = `100${result}`;
        z = (z - 1) / 2;
      }
    }

    // Remove the two last zeroes
    result = result.slice(0, -2);

    return {
      data: result,
      text: this.text,
    };
  }

  valid() {
    return this.number >= 3 && this.number <= 131070;
  }
}

export { pharmacode };