Downloading Slack emojis

slack.js

import fs from 'fs';
import path from 'path';
import fetch from '@kiwicom/fetch';

// See: https://gist.github.com/lmarkus/8722f56baf8c47045621
import { emoji } from './emoji.json';

(async function() {
  for (const [name, link] of Object.entries(emoji)) {
    const downloadLink = link;
    if (link.startsWith('alias:')) {
      continue;
    }

    const result = await fetch(downloadLink);
    const match = downloadLink.match(/.+\.(?<extension>[a-z]+)$/i);
    const iconPath = path.join(__dirname, 'output', `${name}.${match.groups.extension}`);
    const fileStream = fs.createWriteStream(iconPath);
    result.body.pipe(fileStream);

    result.body.on('finish', () => {
      console.warn('Saved %s', iconPath);
    });
    result.body.on('error', err => {
      throw err;
    });
  }
})();