import path from 'path';

import { dest } from 'gulp';
import babelify from 'babelify';
import browserify from 'browserify';
import source from 'vinyl-source-stream';
import buffer from 'vinyl-buffer';
import concat from 'gulp-concat';

const PROJECT_DIR = path.join('src', 'newsreader');
const STATIC_DIR = path.join(PROJECT_DIR, 'js');
const CORE_DIR = path.join(PROJECT_DIR, 'news', 'core', 'static');

const babelTask = () => {
  const config = browserify({
    entries: `${STATIC_DIR}/homepage/index.js`,
    debug: true,
  }).transform(babelify);

  return config
    .bundle()
    .pipe(source('index.js'))
    .pipe(buffer())
    .pipe(concat('homepage.js'))
    .pipe(dest(`${CORE_DIR}/core/dist/js/`));
};

export default babelTask;