handling socket events with redux

redux-socket.jsx

const types  = {
  ADD_TODO: 'ADD_TODO',
  DELETE_TODO: 'DELETE_TODO',
  COMPLETE_TODO: 'COMPLETE_TODO',
};

const socketEvents = {
  ADD_TODO_SUCCESS: 'ADD_TODO_SUCCESS',
  ADD_TODO_FAIL: 'ADD_TODO_FAIL',
};

const metaType = {
  SOCKET: 'SOCKET',
};

function addTodo(todo) {
  return {type: types.ADD_TODO, payload: todo, meta: metaType.SOCKET };
};

function deleteTodo(id) {
  return {type: types.DELETE_TODO, payload: id, meta: metaType.SOCKET };
};

function completeTodo(id) {
  return {type: types.COMPLETE_TODO, payload: id, meta: metaType.SOCKET };
};

const socketMiddleware = store => next => action => {
  if (action.meta === metaType.SOCKET) {
    socket.emit(action.type, { payload: action.payload})
  }
  return next(action);
}

socketEvents.map((event) => {
  socket.on(event, (payload) => {
    dispatch({type: event, payload: payload});
  });
});