71 lines
2.0 KiB
JavaScript
71 lines
2.0 KiB
JavaScript
import { pull } from 'oak-domain/lib/utils/lodash';
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const mCallbacks = [];
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let mActionStackDepth = 0;
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export class Feature {
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callbacks;
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constructor() {
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this.callbacks = [];
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}
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subscribe(callback) {
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this.callbacks.push(callback);
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return () => {
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pull(this.callbacks, callback);
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};
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}
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publish(arg) {
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this.callbacks.forEach(ele => ele(arg));
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}
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clearSubscribes() {
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this.callbacks = [];
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}
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}
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;
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/* export function subscribe(callback: () => any) {
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mCallbacks.push(callback);
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return () => {
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pull(mCallbacks, callback);
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};
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}*/
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/**
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* 方法注解，使函数调用最后一层堆栈时唤起所有登记的回调
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* @param target
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* @param propertyName
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* @param descriptor
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*/
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/* export function Action(target: any, propertyName: string, descriptor: TypedPropertyDescriptor<any>) {
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const method = descriptor.value!;
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descriptor.value = async function (...params: any[]) {
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mActionStackDepth++;
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if (mActionStackDepth > 1000) {
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console.error(`action[${method.name}]调用的层级超过了20，请检查是否存在无限递归`);
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}
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let result;
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try {
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result = method.apply(this, params);
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if (result instanceof Promise) {
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await result;
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}
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else {
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console.error(`方法${method.name}被定义为action但不是异步函数，可能会引起对象解构和重渲染之间的不正确同步`);
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}
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}
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catch (err) {
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// console.error(err, method.name);
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mActionStackDepth--;
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throw err;
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}
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mActionStackDepth--;
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if (mActionStackDepth === 0) {
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const results = mCallbacks.map(
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ele => ele()
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).filter(
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ele => ele instanceof Promise
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);
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if (results.length > 0) {
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await Promise.all(results);
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}
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}
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return result;
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}
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} */
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