forked from OctoWoW/OctoLauncher
OctoWoW
38 lines
712 B
TypeScript
38 lines
712 B
TypeScript
import { observable } from '@trpc/server/observable';
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type Func<T> = (arg: T) => void;
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abstract class Observable<T> {
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private _listeners: Func<T>[] = [];
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protected abstract _value: T;
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protected _notifyObservers(v = this._value) {
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this._listeners = this._listeners.filter(l => {
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try {
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l(v);
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return true;
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} catch (err) {
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console.error('Observer threw, removing listener', err);
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return false;
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}
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});
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}
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observe() {
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return observable<T>(e => {
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e.next(this._value);
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this._listeners.push(e.next);
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return () => {
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this._listeners = this._listeners.filter(v => v !== e.next);
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};
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});
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}
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clearObservers() {
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this._listeners = [];
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}
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}
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export default Observable;
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