badguardhome/client/src/reducers/install.js

import { combineReducers } from 'redux';
import { handleActions } from 'redux-actions';
import { reducer as formReducer } from 'redux-form';
import nanoid from 'nanoid';

import * as actions from '../actions/install';
import { INSTALL_FIRST_STEP } from '../helpers/constants';

const install = handleActions({
    [actions.getDefaultAddressesRequest]: state => ({ ...state, processingDefault: true }),
    [actions.getDefaultAddressesFailure]: state => ({ ...state, processingDefault: false }),
    [actions.getDefaultAddressesSuccess]: (state, { payload }) => {
        const newState = { ...state, ...payload, processingDefault: false };
        return newState;
    },

    [actions.nextStep]: state => ({ ...state, step: state.step + 1 }),
    [actions.prevStep]: state => ({ ...state, step: state.step - 1 }),

    [actions.setAllSettingsRequest]: state => ({ ...state, processingSubmit: true }),
    [actions.setAllSettingsFailure]: state => ({ ...state, processingSubmit: false }),
    [actions.setAllSettingsSuccess]: state => ({ ...state, processingSubmit: false }),
}, {
    step: INSTALL_FIRST_STEP,
    processingDefault: true,
});

const toasts = handleActions({
    [actions.addErrorToast]: (state, { payload }) => {
        const errorToast = {
            id: nanoid(),
            message: payload.error.toString(),
            type: 'error',
        };

        const newState = { ...state, notices: [...state.notices, errorToast] };
        return newState;
    },
    [actions.addSuccessToast]: (state, { payload }) => {
        const successToast = {
            id: nanoid(),
            message: payload,
            type: 'success',
        };

        const newState = { ...state, notices: [...state.notices, successToast] };
        return newState;
    },
    [actions.removeToast]: (state, { payload }) => {
        const filtered = state.notices.filter(notice => notice.id !== payload);
        const newState = { ...state, notices: filtered };
        return newState;
    },
}, { notices: [] });

export default combineReducers({
    install,
    toasts,
    form: formReducer,
});