Efficient cursor count in Meteor.js

raw-count-usage.js

import { rawCount } from './raw-count.js';

rawCount(Meteor.users);
rawCount(Meteor.users, {'profile.active': true});

raw-count.js

import Future from 'fibers/future';

const rawCount = (collection, query = {}) => {
  const fut = new Future();
  collection.rawCollection().count(query, (error, count) => {
    if (error) {
      fut.return(0);
    } else {
      fut.return(count);
    }
  });
  return fut.wait();
};

export { rawCount };