user-required.js

import { t } from '@lingui/macro'

export const userRequired =
  ({ i18n, userKey, loadUserByKey }) =>
  async () => {
    if (typeof userKey === 'undefined') {
      console.warn(
        `User attempted to access controlled content, but userKey was undefined.`,
      )
      throw new Error(i18n._(t`Authentication error. Please sign in.`))
    }

    let user, userDoesNotExist
    try {
      user = await loadUserByKey.load(userKey)
      if (typeof user === 'undefined') {
        userDoesNotExist = true
      }
    } catch (err) {
      console.error(`Database error occurred when running userRequired: ${err}`)
      throw new Error(i18n._(t`Authentication error. Please sign in.`))
    }

    if (userDoesNotExist) {
      console.warn(
        `User: ${userKey} attempted to access controlled content, but no user is associated with that id.`,
      )
      throw new Error(i18n._(t`Authentication error. Please sign in.`))
    }

    return user
  }