57 lines
4.3 KiB
JavaScript
57 lines
4.3 KiB
JavaScript
import { LRUCache } from 'lru-cache';
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export class MemoryCache {
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cache;
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constructor() {
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const defaultTtl = process.env.CACHE_DEFAULT_TTL ? parseInt(process.env.CACHE_DEFAULT_TTL) : 1000 * 60 * 5; // 5 mins default
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this.cache = new LRUCache({
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max: 1000,
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ttl: defaultTtl,
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updateAgeOnGet: false,
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});
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}
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async get(key) {
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const value = this.cache.get(key);
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return value || null;
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}
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async set(key, value, ttl) {
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this.cache.set(key, value, { ttl: ttl ? ttl * 1000 : undefined });
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}
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async del(key) {
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this.cache.delete(key);
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}
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async flush(pattern) {
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if (pattern) {
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// Support simple wildcard patterns (e.g. "home-feed*", "*-feed*")
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// Escape special regex chars except *, then replace * with .*
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const regexPattern = pattern
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.replace(/[.+^${}()|[\]\\]/g, '\\$&') // Escape regex chars
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.replace(/\*/g, '.*'); // Convert * to .*
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const regex = new RegExp(`^${regexPattern}$`);
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for (const key of this.cache.keys()) {
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if (typeof key === 'string' && regex.test(key)) {
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this.cache.delete(key);
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}
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}
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}
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else {
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this.cache.clear();
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}
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}
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keys() {
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return [...this.cache.keys()];
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}
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info() {
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return {
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size: this.cache.size,
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max: this.cache.max,
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provider: 'memory-lru',
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};
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}
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entries() {
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return [...this.cache.keys()].map(key => ({
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key,
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remainingTTL: this.cache.getRemainingTTL(key),
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}));
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}
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}
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