Rescue your Mealime data

(async () => {
  try {
    if (location.hostname !== 'my.mealime.com') {
      alert('Open https://my.mealime.com, sign in, then run this again.');
      return;
    }
    const token = localStorage.getItem('mealimeAuthToken');
    if (!token) {
      alert('You are not signed in. Sign in at my.mealime.com, then run this again.');
      return;
    }
    const call = async (name) => {
      const res = await fetch('https://api.mealime.com/api/v2/' + name, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'Authorization': 'Token token=' + token },
        body: JSON.stringify({ source: 'my-web', client_id: 'rescue' })
      });
      if (!res.ok) throw new Error('Mealime answered ' + res.status + ' for ' + name);
      return res.json();
    };
    const user = await call('get_user');
    if (!user || !user.id) throw new Error('Mealime returned an empty account. Sign out, sign in again, and retry.');
    const grocery = await call('get_full_grocery_list_items');
    ['auth_token', 'share_token'].forEach((k) => { delete user[k]; });
    const out = {
      format: 'suppercharge-mealime-export',
      version: 1,
      exported_at: new Date().toISOString(),
      user: user,
      grocery_list_items: (grocery && grocery.grocery_list_items) || []
    };
    const name = 'mealime-export-' + new Date().toISOString().slice(0, 10) + '.json';
    const blob = new Blob([JSON.stringify(out, null, 2)], { type: 'application/json' });
    const a = document.createElement('a');
    a.href = URL.createObjectURL(blob);
    a.download = name;
    document.body.appendChild(a);
    a.click();
    a.remove();
    const plans = 1 + ((user.history && user.history.length) || 0);
    alert('Saved ' + name + ' (' + plans + ' meal plan(s), ' + ((user.favourites && user.favourites.length) || 0) + ' favourites). Keep this file safe.');
  } catch (e) {
    alert('Could not export: ' + (e && e.message ? e.message : e));
  }
})();