369 lines
9.8 KiB
HTML
369 lines
9.8 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<meta charset="utf-8">
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<title>JSDoc: Source: Updux.js</title>
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<body>
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<div id="main">
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<h1 class="page-title">Source: Updux.js</h1>
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<section>
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<article>
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<pre class="prettyprint source linenums"><code>/* TODO change * for leftovers to +, change subscriptions to reactions */
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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 { get, map, mapValues, merge, difference } 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 {
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buildMiddleware,
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augmentMiddlewareApi,
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} 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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/** @type { unknown } */
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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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#subscriptions = [];
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#splatSelector = undefined;
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#splatReaction = undefined;
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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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if (config.subduxes) {
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this.#subduxes = mapValues(config.subduxes, (sub) =>
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sub instanceof Updux ? sub : new Updux(sub)
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);
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}
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if (config.actions) {
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for (const [type, actionArg] of Object.entries(config.actions)) {
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if (typeof actionArg === 'function' && actionArg.type) {
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this.#actions[type] = actionArg;
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} else {
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this.#actions[type] = action(type, actionArg);
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}
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}
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}
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this.#selectors = config.selectors ?? {};
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this.#mutations = config.mutations ?? {};
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this.#splatSelector = config.splatSelector;
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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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this.#subscriptions = config.subscriptions ?? [];
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this.#splatReaction = config.splatReaction;
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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 subscriptions() {
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return this.#subscriptions;
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}
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setSplatSelector(name, f) {
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this.#splatSelector = [name, f];
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}
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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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/** @return { import('./Updux').What } */
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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(
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this.#selectors,
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this.#splatSelector,
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this.#subduxes
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);
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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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addSubscription(subscription) {
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this.#subscriptions = [...this.#subscriptions, subscription];
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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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splatSubscriber(store, inner, splatReaction) {
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const cache = {};
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return () => (state, previous, unsub) => {
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const cacheKeys = Object.keys(cache);
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const newKeys = difference(Object.keys(state), cacheKeys);
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for (const slice of newKeys) {
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let localStore = {
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...store,
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getState: () => store.getState()[slice],
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};
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cache[slice] = [];
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if (typeof splatReaction === 'function') {
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localStore = {
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...localStore,
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...splatReaction(localStore, slice),
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};
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}
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const { unsub, subscriber, subscriberRaw } =
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inner.subscribeAll(localStore);
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cache[slice].push({ unsub, subscriber, subscriberRaw });
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subscriber();
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}
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const deletedKeys = difference(cacheKeys, Object.keys(state));
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for (const deleted of deletedKeys) {
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for (const inner of cache[deleted]) {
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inner.subscriber();
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inner.unsub();
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}
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delete cache[deleted];
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}
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};
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}
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subscribeTo(store, subscription, setupArgs = []) {
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const localStore = augmentMiddlewareApi(
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{
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...store,
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subscribe: (subscriber) =>
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this.subscribeTo(store, () => subscriber),
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},
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this.actions,
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this.selectors
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);
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const subscriber = subscription(localStore, ...setupArgs);
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let previous;
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const memoSub = () => {
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const state = store.getState();
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if (state === previous) return;
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let p = previous;
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previous = state;
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subscriber(state, p, unsub);
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};
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let ret = store.subscribe(memoSub);
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const unsub = typeof ret === 'function' ? ret : ret.unsub;
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return {
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unsub,
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subscriber: memoSub,
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subscriberRaw: subscriber,
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};
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}
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subscribeAll(store) {
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let results = this.#subscriptions.map((sub) =>
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this.subscribeTo(store, sub)
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);
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for (const subdux in this.#subduxes) {
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if (subdux !== '*') {
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const localStore = {
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...store,
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getState: () => get(store.getState(), subdux),
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};
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results.push(this.#subduxes[subdux].subscribeAll(localStore));
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}
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}
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if (this.#splatReaction) {
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results.push(
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this.subscribeTo(
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store,
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this.splatSubscriber(
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store,
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this.#subduxes['*'],
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this.#splatReaction
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)
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)
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);
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}
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return {
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unsub: () => results.forEach(({ unsub }) => unsub()),
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subscriber: () => results.forEach(({ subscriber }) => subscriber()),
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subscriberRaw: (...args) =>
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results.forEach(({ subscriberRaw }) => subscriberRaw(...args)),
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};
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}
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createStore(initial) {
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const store = reduxCreateStore(
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this.reducer,
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initial ?? 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 = this.selectors;
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merge(
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store.getState,
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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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);
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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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this.subscribeAll(store);
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return store;
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}
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}
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const x = new Updux();
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x.selectors;
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</code></pre>
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</article>
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</section>
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</div>
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<nav>
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<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="Updux.html">Updux</a></li></ul>
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Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.7</a> on Tue Oct 12 2021 10:16:59 GMT-0400 (Eastern Daylight Time)
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