Pre-process (de-batch, filter) actions for redux saga middleware, without affecting the reducers

createWrappedSagaMiddleware.js

const noop = () => {};
const actionsToIgnore = new Set(['SOME_ACTION', 'SOME_OTHER_ACTION']);

function createWrappedSagaMiddleware() {
  const delegate = createSagaMiddleware();
  const sagaMiddleware = props => next => {
    const actionHandler = delegate(props)(noop);
    return action => {
      // send to reducers, keep the result
      const result = next(action);
      // expand batch actions
      const actions = action.type === 'BATCHING_REDUCER.BATCH' ? action.payload : [action];
      // trigger saga side-effects for actions we care about, ignore return value
      actions
        .filter(({type}) => !actionsToIgnore.has(type))
        .forEach(actionHandler);
      // pass new state back up the middleware chain
      return result;
    };
  };
  sagaMiddleware.run = delegate.run;
  return sagaMiddleware;
}

A way to pre-process actions for redux-saga middleware, without affecting the action stream that is sent to the reducers.