ProjectContext.js

  const saveTask = useTask(function*() {
    yield timeout(1000);
    yield doSaveTask.perform();
  }, 'RESTARTABLE');

  const doSaveTask = useTask(function*() {
    // Ensure that we ALWAYS have the most recent project state
    const currentState = yield getMostRecentProjectState();
    const { revision } = yield updateProject(authHeaders, currentState);
    yield _setProjectState(assoc('revision', revision));
    // We should never have multiple of these running at the same time
  }, 'ENQUEUE');

  const setProjectState = newData => {
    _setProjectState(assoc('data', newData));
    saveTask.perform();
  };

  const getMostRecentProjectState = () =>
    new Promise(resolve => _setProjectState(tap(resolve)));