get-threads.js

async function getThreads(api, dispatch) {
  try {
    let mailboxes = await api.get(`mailboxes`);
    mailboxes = mailboxes.mailboxes;

    for (let i = 0; i < mailboxes.length; i++) {
      let box = mailboxes[i];
      let inbox = await api.get(`mailboxes/${box.id}/threads/folder/in`);

      for (let i = 0; i < inbox.threads.length; i++) {
        let thread = { ...inbox.threads[i] };
        combineThreadWithPreview(thread, inbox.linked.messages);
        dispatch(addThread(thread));
      }
    }
  } catch (err) {
    console.log(err);
  }
}