gistfile1.txt

export const LOAD_EMAIL_PREFERENCES = 'LOAD_EMAIL_PREFERENCES'
export const LOADED_EMAIL_PREFERENCES = 'LOADED_EMAIL_PREFERENCES'
export function loadEmailPreferences (personId) {
  return async (dispatch, getState) => {
    const account = getState().guests[personId].account
    const centres = account.newsletter_centre_ids
    if (centres.length) {
      dispatch({ type: LOAD_EMAIL_PREFERENCES })
      const newslettersByCentre = await Promise.all(centres.map(getNewslettersByCentre))
      const subscriptions = account.newsletter_subscriptions
      const newsletters = Array.prototype.concat.apply([], newslettersByCentre)
        .filter(newsletter => subscriptions.includes(newsletter.newsletter_id))
      dispatch({ type: LOADED_EMAIL_PREFERENCES, payload: { newsletters } })
    }
  }
}

async function getNewslettersByCentre (centre_id) {
  const newslettersEndpoint = NEWSLETTERS_ENDPOINT.clone()
  newslettersEndpoint.addQuery('centre_id', centre_id)
  const newslettersResponse = await looseFetch(newslettersEndpoint)
  return Array.prototype.concat.apply([], newslettersResponse.data.map(o => o.newsletters))
}