brainlet-react/bfrontend/src/store.js

import { createStore } from 'redux';

const intitialState = {
    user: null,
    categories: null,
    gateway: { isConnected: false },
    messages: {}
};

const reducer = (state = intitialState, payload) => {
    switch (payload.type) {
        case 'authenticator/updatelocaluserobject': {
            return {
                ...state,
                user: payload.user
            }
        }

        case 'categories/updatecategorylist': {
            return {
                ...state,
                categories: payload.categories
            }
        }

        case 'gateway/connectionstatus': {
            return {
                ...state,
                gateway: {
                    isConnected: payload.gateway.isConnected
                }
            }
        }

        case 'messagestore/addmessage': {
            return {
                ...state,
                messages: {
                    ...state.messages,
                    [payload.message.category._id]: [
                        ...state.messages[payload.message.category._id] || [],
                        payload.message
                    ]
                }
            }
        }

        default: {
            return state;
        }
    }
};

const store = createStore(reducer, window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__());

export default store;