Apply namespace for selectors, for multiple levels of re-exporting selectors.

applyScopeToSelectors.js

export default function applyScopeToSelectors(selectors, stateKey) {
  return Object.keys(selectors).reduce((res, val) => {
    if (typeof selectors[val] === 'object') {
      return { ...res, [val]: applyScopeToSelectors(selectors[val], stateKey) };
    }
    return { ...res, [val]: state => selectors[val](state[stateKey]) };
  }, {});
}