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import { getLogger } from './logger';
const log = getLogger('utils.PendingTask');
export class PendingTask<T> {
private readonly resolveCallback: (value: T) => void;
private readonly rejectCallback: (reason?: unknown) => void;
private resolved = false;
private timeout: NodeJS.Timeout | null;
constructor(
resolveCallback: (value: T) => void,
rejectCallback: (reason?: unknown) => void,
timeoutMs?: number,
timeoutCallback?: () => void,
) {
this.resolveCallback = resolveCallback;
this.rejectCallback = rejectCallback;
if (timeoutMs) {
this.timeout = setTimeout(() => {
if (!this.resolved) {
this.reject(new Error('Request timed out'));
if (timeoutCallback) {
timeoutCallback();
}
}
}, timeoutMs);
} else {
this.timeout = null;
}
}
resolve(value: T): void {
if (this.resolved) {
log.warn('Trying to resolve already resolved promise');
return;
}
this.markResolved();
this.resolveCallback(value);
}
reject(reason?: unknown): void {
if (this.resolved) {
log.warn('Trying to reject already resolved promise');
return;
}
this.markResolved();
this.rejectCallback(reason);
}
private markResolved() {
this.resolved = true;
if (this.timeout !== null) {
clearTimeout(this.timeout);
}
}
}
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