45 lines
1 KiB
TypeScript
45 lines
1 KiB
TypeScript
import { db } from '@/db/postgre.js';
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import { Meta } from '@/models/entities/meta.js';
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let cache: Meta;
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export async function fetchMeta(noCache = false): Promise<Meta> {
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if (!noCache && cache) return cache;
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return await db.transaction(async transactionalEntityManager => {
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// New IDs are prioritized because multiple records may have been created due to past bugs.
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const metas = await transactionalEntityManager.find(Meta, {
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order: {
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id: 'DESC',
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},
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});
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const meta = metas[0];
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if (meta) {
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cache = meta;
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return meta;
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} else {
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// If fetchMeta is called at the same time when meta is empty, this part may be called at the same time, so use fail-safe upsert.
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const saved = await transactionalEntityManager
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.upsert(
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Meta,
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{
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id: 'x',
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},
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['id'],
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)
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.then((x) => transactionalEntityManager.findOneByOrFail(Meta, x.identifiers[0]));
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cache = saved;
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return saved;
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}
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});
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}
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setInterval(() => {
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fetchMeta(true).then(meta => {
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cache = meta;
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});
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}, 1000 * 10);
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