Using redux-saga + react-redux without Redux

app.js

// We are integrating our legacy framework (that works a bit like Redux but with a shitty api)
// see https://github.com/stample/atom-react
// with existing redux tools like Redux-saga and React-redux
// Note that Reselect works too

// This is an adapter from atom-react store to redux store to be able to use connect() of react-redux
// See https://github.com/rackt/react-redux/issues/228
function toReduxStore(atomReactContext) {
    const onStateChangeListeners = [];
    atomReactContext.beforeRender(() => {
        onStateChangeListeners.forEach(listener => listener());
    });
    return {
        subscribe: listener => {
            onStateChangeListeners.push(listener);
            var isSubscribed = true;
            return function unsubscribe() {
                if (!isSubscribed) {
                    return;
                }
                isSubscribed = false;
                var index = onStateChangeListeners.indexOf(listener);
                onStateChangeListeners.splice(index, 1);
            }
        },
        dispatch: event => {
            return atomReactContext.publishEvent(event);
        },
        getState: () => {
            return atomReactContext.getState();
        }
    }
}



// We want to be able to use "connect" of react-redux so we use an adapter
var reduxStoreLike = toReduxStore(context);
var Main = React.createClass({
    propTypes: {
        appStateCursor: AtomReact.PropTypes.isCursor
    },
    render: function() {
        return (
          <ReactReduxProvider store={reduxStoreLike}>
              <Layout appStateCursor={this.props.appStateCursor}/>
          </ReactReduxProvider>
        )
    }
});



const reduxSagaIO = {
    dispatch: events => context.publishEvents(events),
    subscribe: listener => {
        const callback = event => {
            listener({...event, type: event.name})
        };
        context.addEventListener(callback);
        return () => context.removeEventListener(callback);
    }
};
runSaga(saga(),reduxSagaIO,sagaMonitor);