bitburner-src/src/utils/EventEmitter.ts
2021-11-11 23:28:08 -05:00

34 lines
860 B
TypeScript

/**
* Generic Event Emitter class following a subscribe/publish paradigm.
*/
function uuidv4(): string {
return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function (c) {
const r = (Math.random() * 16) | 0,
v = c == "x" ? r : (r & 0x3) | 0x8;
return v.toString(16);
});
}
export class EventEmitter<T extends any[]> {
subscribers: { [key: string]: (...args: [...T]) => void | undefined } = {};
subscribe(s: (...args: [...T]) => void): () => void {
let uuid = uuidv4();
while (this.subscribers[uuid] !== undefined) uuid = uuidv4();
this.subscribers[uuid] = s;
return () => {
delete this.subscribers[uuid];
};
}
emit(...args: [...T]): void {
for (const s in this.subscribers) {
const sub = this.subscribers[s];
if (sub === undefined) continue;
sub(...args);
}
}
}