22 lines
474 B
TypeScript
22 lines
474 B
TypeScript
import { LimitedMap } from "./limited_map.ts";
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const cache = new LimitedMap<any>(50);
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export async function ttlCache<K, V>(
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key: K,
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fn: (key: K) => Promise<V>,
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ttlSecs?: number,
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): Promise<V> {
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if (!ttlSecs) {
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return fn(key);
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}
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const serializedKey = JSON.stringify(key);
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const cached = cache.get(serializedKey);
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if (cached) {
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return cached;
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}
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const result = await fn(key);
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cache.set(serializedKey, result, ttlSecs * 1000);
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return result;
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}
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