MyCrypto/common/sagas/notifications.js

// @flow
import { takeEvery, put, call } from 'redux-saga/effects';
import { delay } from 'redux-saga';
import type { Effect } from 'redux-saga/effects';
import { closeNotification } from 'actions/notifications';
import type { ShowNotificationAction } from 'actions/notifications';

function* handleNotification(action?: ShowNotificationAction) {
  if (!action) return;
  const { duration } = action.payload;
  // show forever
  if (duration === 0) {
    return;
  }

  // FIXME
  yield call(delay, duration || 5000);
  yield put(closeNotification(action.payload));
}

export default function* notificationsSaga(): Generator<Effect, void, any> {
  yield takeEvery('SHOW_NOTIFICATION', handleNotification);
}