post.js

const helpers = require('../../helpers/helpers')
const uuid = require('uuid')

module.exports = models => async (req, res) => {
  const { recommendation, comments, recommendationType } = req.body

  if (
    !helpers.checkForUndefinedParams(
      recommendation,
      comments,
      recommendationType,
    )
  )
    return res.status(400).json({ error: 'Parameters are missing.' })

  const reqUser = await models.User.find(req.user)
  const { collectionId, fragmentId } = req.params
  let collection, fragment
  try {
    collection = await models.Collection.find(collectionId)
    if (!collection.fragments.includes(fragmentId))
      return res.status(400).json({
        error: `Collection and fragment do not match.`,
      })

    fragment = await models.Fragment.find(fragmentId)
  } catch (e) {
    const notFoundError = await helpers.handleNotFoundError(e, 'Item')
    return res.status(notFoundError.status).json({
      error: notFoundError.message,
    })
  }
  fragment.recommendations = fragment.recommendations || []
  const newRecommendation = {
    id: uuid.v4(),
    userId: reqUser.id,
    submittedOn: new Date(),
    recommendationType,
    recommendation,
    comments,
  }
  fragment.recommendations.push(newRecommendation)
  await fragment.save()
  return res.status(200).json(newRecommendation)
}