water/water-mini/scripts/generate-test-invite-qr.cjs

const fs = require('node:fs');
const path = require('node:path');
const QRCode = require('../node_modules/qrcode-terminal/vendor/QRCode');
const levels = require('../node_modules/qrcode-terminal/vendor/QRCode/QRErrorCorrectLevel');
const { PNG } = require('pngjs');
const QRReader = require('qrcode-reader');
const url = 'http://192.168.110.245:8787/water-mini/index.html?invite_code=TEST-HC202609&demo=1';
const qr = new QRCode(-1, levels.L);
qr.addData(url);
qr.make();
const scale = 8;
const quiet = 4;
const size = (qr.getModuleCount() + quiet * 2) * scale;
const png = new PNG({ width: size, height: size });
for (let y = 0; y < size; y++) {
  for (let x = 0; x < size; x++) {
    const row = Math.floor(y / scale) - quiet;
    const col = Math.floor(x / scale) - quiet;
    const dark = row >= 0 && col >= 0 && row < qr.getModuleCount() && col < qr.getModuleCount() && qr.isDark(row, col);
    const offset = (y * size + x) * 4;
    const color = dark ? [0, 0, 0] : [255, 255, 255];
    png.data[offset] = color[0];
    png.data[offset + 1] = color[1];
    png.data[offset + 2] = color[2];
    png.data[offset + 3] = 255;
  }
}
const output = path.resolve(__dirname, '../src/static/invite-test.png');
fs.mkdirSync(path.dirname(output), { recursive: true });
fs.writeFileSync(output, PNG.sync.write(png));
const reader = new QRReader();
reader.callback = (error, result) => {
  if (error || result.result !== url) throw error || new Error('QR decode mismatch');
  console.log('Verified QR image: ' + output);
  console.log('Invite URL: ' + result.result);
};
reader.decode(PNG.sync.read(fs.readFileSync(output)));