@wordpress/nux/src/store/reducer.js

NUX (New User eXperience) module for WordPress.

/**
 * WordPress dependencies
 */
import { combineReducers } from '@wordpress/data';

/**
 * Reducer that tracks which tips are in a guide. Each guide is represented by
 * an array which contains the tip identifiers contained within that guide.
 *
 * @param {Array}  state  Current state.
 * @param {Object} action Dispatched action.
 *
 * @return {Array} Updated state.
 */
export function guides( state = [], action ) {
	switch ( action.type ) {
		case 'TRIGGER_GUIDE':
			return [ ...state, action.tipIds ];
	}

	return state;
}

/**
 * Reducer that tracks whether or not tips are globally enabled.
 *
 * @param {boolean} state  Current state.
 * @param {Object}  action Dispatched action.
 *
 * @return {boolean} Updated state.
 */
export function areTipsEnabled( state = true, action ) {
	switch ( action.type ) {
		case 'DISABLE_TIPS':
			return false;

		case 'ENABLE_TIPS':
			return true;
	}

	return state;
}

/**
 * Reducer that tracks which tips have been dismissed. If the state object
 * contains a tip identifier, then that tip is dismissed.
 *
 * @param {Object} state  Current state.
 * @param {Object} action Dispatched action.
 *
 * @return {Object} Updated state.
 */
export function dismissedTips( state = {}, action ) {
	switch ( action.type ) {
		case 'DISMISS_TIP':
			return {
				...state,
				[ action.id ]: true,
			};

		case 'ENABLE_TIPS':
			return {};
	}

	return state;
}

const preferences = combineReducers( { areTipsEnabled, dismissedTips } );

export default combineReducers( { guides, preferences } );