waveorb/lib/bundler.js

Waveorb Javascript web app development framework

const { URL } = require('url')

// Add app version as cache buster
function addCacheBuster(name) {
  const slashed = name.startsWith('/')
  name = name.replace(/\/+/g, '/').replace(/^\//, '')
  const url = new URL(`http://localhost/${name}`)
  const version = process.env.WAVEORB_APP_VERSION
  if (version && !url.searchParams.has('v')) {
    url.searchParams.append('v', version)
  }
  const pathname = slashed ? url.pathname : url.pathname.slice(1)
  return pathname + url.search
}

function tag(name, type) {
  name = addCacheBuster(name)
  if (type == 'js') {
    return `<script src="${name}"></script>`
  }
  if (type == 'css') {
    return `<link href="${name}" rel="stylesheet" type="text/css">`
  }
  return name
}

module.exports = function (config = {}, options = {}) {
  function assets(names, type) {
    return names
      .map(function (name) {
        if (name.endsWith(`bundle.${type}`) && !options.compress) {
          return (config[type] || []).map((file) => tag(file, type)).join('')
        }
        return tag(name, type)
      })
      .join('')
  }
  return {
    script: function (...names) {
      return assets(names, 'js')
    },
    style: function (...names) {
      return assets(names, 'css')
    }
  }
}