55 lines
2 KiB
TypeScript
55 lines
2 KiB
TypeScript
import { Brackets } from 'typeorm';
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import { fetchMeta } from '@/misc/fetch-meta.js';
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import { Instances } from '@/models/index.js';
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import { Instance } from '@/models/entities/instance.js';
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import { DAY } from '@/const.js';
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// Threshold from last contact after which an instance will be considered
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// "dead" and should no longer get activities delivered to it.
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const deadThreshold = 7 * DAY;
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/**
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* Returns the subset of hosts which should be skipped.
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*
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* @param hosts array of punycoded instance hosts
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* @returns array of punycoed instance hosts that should be skipped (subset of hosts parameter)
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*/
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export async function skippedInstances(hosts: Array<Instace['host']>): Array<Instance['host']> {
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// first check for blocked instances since that info may already be in memory
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const { blockedHosts } = await fetchMeta();
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const skipped = hosts.filter(host => blockedHosts.includes(host));
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// if possible return early and skip accessing the database
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if (skipped.length === hosts.length) return hosts;
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const deadTime = new Date(Date.now() - deadThreshold);
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return skipped.concat(
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await Instances.createQueryBuilder('instance')
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.where('instance.host in (:...hosts)', {
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// don't check hosts again that we already know are suspended
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// also avoids adding duplicates to the list
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hosts: hosts.filter(host => !skipped.includes(host)),
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})
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.andWhere(new Brackets(qb => { qb
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.where('instance.isSuspended')
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.orWhere('instance.lastCommunicatedAt < :deadTime', { deadTime });
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}))
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.select('host')
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.getRawMany()
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);
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}
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/**
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* Returns whether a specific host (punycoded) should be skipped.
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* Convenience wrapper around skippedInstances which should only be used if there is a single host to check.
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* If you have multiple hosts, consider using skippedInstances instead to do a bulk check.
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*
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* @param host punycoded instance host
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* @returns whether the given host should be skipped
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*/
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export async function shouldSkipInstance(host: Instance['host']): boolean {
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const skipped = await skippedInstances([host]);
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return skipped.length > 0;
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}
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