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import { Job } from 'bullmq';
import { Backoffs } from 'bullmq';
/**
* Calculates the delay until the next attempt for a job.
*
* @param job The job to calculate the next attempt delay for
* @returns The delay in milliseconds, or null if there is no next attempt or backoff is not set
*/
export function NextAttemptDelayInMs(job: Job): number | null {
const attemptsMade = job.attemptsMade + 1;
const maxAttempts = job.opts?.attempts || 1;
// If this is the last attempt, return null
if (attemptsMade >= maxAttempts) {
return null;
}
// Normalize the backoff options
const backoff = Backoffs.normalize(job.opts.backoff);
if (!backoff) {
return null;
}
// Calculate the delay using Backoffs.calculate
const delay = Backoffs.calculate(backoff, attemptsMade, new Error(), job);
// The delay can be a Promise, a number, or undefined
if (delay === undefined) {
return null;
}
// If it's a Promise, we can't handle it synchronously, so return null
if (delay instanceof Promise) {
return null;
}
return delay;
}
export function NextAttemptDelayInWholeSeconds(job: Job) {
const delay = NextAttemptDelayInMs(job);
if (delay == null) {
return null;
}
return Math.round(delay / 1000);
}
/**
* Checks if a job has been retried (not on its first attempt).
*
* @param job The job to check
* @returns True if the job has been retried (attemptsMade > 1), false otherwise
*/
export function HasBeenRetried(job: Job): boolean {
const attemptsMade = job.attemptsMade + 1;
return attemptsMade > 1;
}
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