48 lines
1.3 KiB
TypeScript
48 lines
1.3 KiB
TypeScript
import type { ArgumentTypes } from "../types";
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export default class EventListenerBase<Listeners extends {[name: string]: Function}> {
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protected listeners: Partial<{
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[k in keyof Listeners]: Array<{callback: Listeners[k], once?: true}>
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}> = {};
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protected listenerResults: Partial<{
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[k in keyof Listeners]: ArgumentTypes<Listeners[k]>
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}> = {};
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constructor(private reuseResults?: true) {
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}
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public addListener(name: keyof Listeners, callback: Listeners[typeof name], once?: true) {
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(this.listeners[name] ?? (this.listeners[name] = [])).push({callback, once});
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if(this.listenerResults.hasOwnProperty(name)) {
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callback(this.listenerResults[name]);
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if(once) {
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this.removeListener(name, callback);
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}
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}
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}
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public removeListener(name: keyof Listeners, callback: Listeners[typeof name]) {
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if(this.listeners[name]) {
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this.listeners[name].findAndSplice(l => l.callback == callback);
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}
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}
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protected setListenerResult(name: keyof Listeners, ...args: ArgumentTypes<Listeners[typeof name]>) {
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if(this.reuseResults) {
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this.listenerResults[name] = args;
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}
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if(this.listeners[name]) {
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this.listeners[name].forEach(listener => {
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listener.callback(...args);
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if(listener.once) {
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this.removeListener(name, listener.callback);
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}
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});
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}
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}
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} |