// CommonJS
const Koder = require('@maslick/koder');

// ES6 modules
import Koder from '@maslick/koder';

const Koder = require('@maslick/koder');
const {loadImage, createCanvas} = require("canvas");

const getImageData = async (src) => {
  const img = await loadImage(src);
  const canvas = createCanvas(img.width, img.height);
  const ctx = canvas.getContext('2d');
  ctx.drawImage(img, 0, 0);
  return {
    data: ctx.getImageData(0, 0, img.width, img.height).data,
    width: img.width,
    height: img.height
  };
};

(async () => {
  const url = 'https://raw.githubusercontent.com/maslick/koder/master/screenshots/app_1.png';
  const koder = await new Koder().initialized;
  const {data, width, height} = await getImageData(url);

  const t0 = new Date().getTime();
  const res = koder.decode(data, width, height);
  const t1 = new Date().getTime();

  console.log(`Scanned in ${t1-t0} ms`);  // Scanned in 7 ms
  console.log(res);                       // http://en.m.wikipedia.org
})();