95 lines
2.3 KiB
TypeScript
Executable File
95 lines
2.3 KiB
TypeScript
Executable File
import { useEffect, useRef, useState } from "react";
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export const useLocal = <T extends object>(
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data: T,
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effect?: (arg: {
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init: boolean;
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setDelayedRender: (arg: boolean) => void;
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}) => Promise<void | (() => void)> | void | (() => void),
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deps?: any[]
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): {
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[K in keyof T]: T[K] extends Promise<any> ? null | Awaited<T[K]> : T[K];
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} & { render: () => void } => {
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const [, _render] = useState({});
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const _ = useRef({
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data: data as unknown as T & {
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render: () => void;
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},
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deps: (deps || []) as any[],
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ready: false,
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_loading: {} as any,
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lastRender: 0,
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lastRenderCount: 0,
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delayedRender: false,
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delayedRenderTimeout: null as any,
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});
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const local = _.current;
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useEffect(() => {
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local.ready = true;
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if (effect)
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effect({
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init: true,
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setDelayedRender(arg) {
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local.delayedRender = arg;
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},
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});
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}, []);
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if (local.ready === false) {
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local._loading = {};
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local.data.render = () => {
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if (local.ready) {
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if (local.delayedRender) {
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if (Date.now() - local.lastRender > 100) {
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local.lastRender = Date.now();
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_render({});
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} else {
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clearTimeout(local.delayedRenderTimeout);
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local.delayedRenderTimeout = setTimeout(local.data.render, 50);
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}
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return;
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}
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if (Date.now() - local.lastRender < 300) {
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local.lastRenderCount++;
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} else {
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local.lastRenderCount = 0;
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}
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if (local.lastRenderCount > 300) {
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throw new Error(
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"local.render more than 300 times in less than 300ms"
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);
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}
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local.lastRender = Date.now();
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_render({});
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}
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};
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} else {
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if (local.deps.length > 0 && deps) {
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for (const [k, dep] of Object.entries(deps) as any) {
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if (local.deps[k] !== dep) {
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local.deps[k] = dep;
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if (effect) {
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setTimeout(() => {
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effect({
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init: false,
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setDelayedRender(arg) {
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local.delayedRender = arg;
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},
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});
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});
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}
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break;
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}
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}
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}
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}
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return local.data as any;
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};
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