151 lines
4.0 KiB
JavaScript
151 lines
4.0 KiB
JavaScript
import moize from 'moize';
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import u from '@yanick/updeep';
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import { createStore as reduxCreateStore, applyMiddleware } from 'redux';
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import { mapValues } from 'lodash-es';
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import { buildInitial } from './buildInitial/index.js';
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import { buildActions } from './buildActions/index.js';
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import { buildSelectors } from './buildSelectors/index.js';
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import { action } from './actions.js';
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import { buildUpreducer } from './buildUpreducer.js';
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import { buildMiddleware } from './buildMiddleware/index.js';
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/**
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* @public
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* `Updux` is a way to minimize and simplify the boilerplate associated with the
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* creation of a `Redux` store. It takes a shorthand configuration
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* object, and generates the appropriate reducer, actions, middleware, etc.
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* In true `Redux`-like fashion, upduxes can be made of sub-upduxes (`subduxes` for short) for different slices of the root state.
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*/
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export class Updux {
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#initial = {};
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#subduxes = {};
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/** @type Record<string,Function> */
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#actions = {};
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#selectors = {};
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#mutations = {};
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#effects = [];
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constructor(config) {
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this.#initial = config.initial ?? {};
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this.#subduxes = config.subduxes ?? {};
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this.#actions = config.actions ?? {};
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this.#selectors = config.selectors ?? {};
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this.#mutations = config.mutations ?? {};
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Object.keys(this.#mutations)
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.filter((action) => action !== '*')
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.filter((action) => !this.actions.hasOwnProperty(action))
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.forEach((action) => {
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throw new Error(`action '${action}' is not defined`);
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});
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if (config.effects) {
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this.#effects = Object.entries(config.effects);
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}
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}
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#memoInitial = moize(buildInitial);
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#memoActions = moize(buildActions);
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#memoSelectors = moize(buildSelectors);
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#memoUpreducer = moize(buildUpreducer);
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#memoMiddleware = moize(buildMiddleware);
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get middleware() {
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return this.#memoMiddleware(
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this.#effects,
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this.actions,
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this.selectors,
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this.#subduxes
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);
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}
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get initial() {
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return this.#memoInitial(this.#initial, this.#subduxes);
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}
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/**
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* @return {Record<string,Function>}
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*/
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get actions() {
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return this.#memoActions(this.#actions, this.#subduxes);
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}
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get selectors() {
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return this.#memoSelectors(this.#selectors, this.#subduxes);
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}
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get upreducer() {
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return this.#memoUpreducer(
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this.initial,
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this.#mutations,
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this.#subduxes
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);
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}
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get reducer() {
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return (state, action) => this.upreducer(action)(state);
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}
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addAction(type, payloadFunc) {
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const theAction = action(type, payloadFunc);
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this.#actions = { ...this.#actions, [type]: theAction };
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return theAction;
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}
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addSelector(name, func) {
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this.#selectors = {
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...this.#selectors,
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[name]: func,
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};
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return func;
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}
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addMutation(name, mutation) {
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if (typeof name === 'function') name = name.type;
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this.#mutations = {
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...this.#mutations,
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[name]: mutation,
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};
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return this;
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}
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addEffect(action, effect) {
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this.#effects = [...this.#effects, [action, effect]];
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}
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createStore() {
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const store = reduxCreateStore(
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this.reducer,
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this.initial,
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applyMiddleware(this.middleware)
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);
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store.actions = this.actions;
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store.selectors = mapValues(this.selectors, (selector) => {
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return (...args) => {
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let result = selector(store.getState());
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if (typeof result === 'function') return result(...args);
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return result;
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};
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});
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for (const action in this.actions) {
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store.dispatch[action] = (...args) => {
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return store.dispatch(this.actions[action](...args));
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};
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}
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return store;
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}
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}
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