reducersFactory.js

'use strict';

/**
 * I make reducersFactory a function in order to pass it an initial state as a parameter.
 * Switch-case are just for example. You may have your own
 */
function reducersFactory(initialState) {

    return function reducers(state = initialState, action) {
        switch (action.type) {
            case 'login_success':
                return Object.assign({}, state, {
                    user: action.user,
                    login_starts: false,
                });
                break;
            case 'login_failure':
                return Object.assign({}, state, {
                    user: action.user,
                    login_starts: false,
                });
                break;
            default:
                return state;
        }
    }
}

module.exports = reducersFactory;