// After the build: write brotli and gzip copies of every text file, so the
// server can send them compressed without compressing on each request.
import { readdirSync, readFileSync, statSync, writeFileSync } from 'node:fs';
import { extname, join } from 'node:path';
import { brotliCompressSync, constants, gzipSync } from 'node:zlib';

const root = new URL('../dist/', import.meta.url).pathname;
const TEXT = new Set(['.js', '.mjs', '.css', '.html', '.svg', '.json', '.webmanifest', '.txt']);
let count = 0;

function walk(dir) {
  for (const name of readdirSync(dir)) {
    const path = join(dir, name);
    if (statSync(path).isDirectory()) walk(path);
    else if (TEXT.has(extname(name)) && statSync(path).size > 1024) {
      const data = readFileSync(path);
      writeFileSync(`${path}.br`, brotliCompressSync(data, { params: { [constants.BROTLI_PARAM_QUALITY]: 11 } }));
      writeFileSync(`${path}.gz`, gzipSync(data, { level: 9 }));
      count++;
    }
  }
}

walk(root);
console.log(`Compressed ${count} files`);