anotherxx

For categories:

ID | Name | Parent_ID
(Parent ID is for category tree)

For products:

ID | Category_ID | Name | Description | Other
Let's say the category tree is like

anotherxx

const createStore = (reducer) =>
{
    let state;
    let listeners = [];

    const getState = () => state;

    const dispatch = (action) =>
    {
        state = reducer(state , action);