22 lines
520 B
TypeScript
22 lines
520 B
TypeScript
type CacheEntry<T> = { data: T; expiresAt: number };
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const store = new Map<string, CacheEntry<unknown>>();
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export function cached<T>(
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key: string,
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ttlMs: number,
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fn: () => Promise<T>,
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): Promise<T> {
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const existing = store.get(key);
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if (existing && existing.expiresAt > Date.now()) {
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return Promise.resolve(existing.data as T);
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}
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return fn().then((data) => {
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store.set(key, { data, expiresAt: Date.now() + ttlMs });
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return data;
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});
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}
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export function bustCache(key: string): void {
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store.delete(key);
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}
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