frontend/middleware/locals.js

module.exports = (req, res, next) => {
  if (res.marko) {
    res.markoAsync = async(template, input) => {
      const locals = Object.assign((res.locals || {}), input)

      for (const key in locals) {
        const value = locals[key]
        if (value instanceof Promise) {
          locals[key] = await value
        }
      }

      return res.marko(template, locals)
    }
  }

  if (req.user) {
    res.locals.user = {
      loggedIn: true,
      name: req.user._json.name,
    }
  } else {
    res.locals.user = {
      loggedIn: false,
    }
  }

  next()
}