docfs/dist/utils/cache.js

MCP server for accessing local file system content with intelligent search and listing tools

export class LRUCache {
    maxSize;
    ttl;
    cache = new Map();
    constructor(maxSize, ttl) {
        this.maxSize = maxSize;
        this.ttl = ttl;
    }
    get(key) {
        const entry = this.cache.get(key);
        if (!entry)
            return undefined;
        if (Date.now() > entry.expires) {
            this.cache.delete(key);
            return undefined;
        }
        // refresh LRU order
        this.cache.delete(key);
        this.cache.set(key, entry);
        return entry.value;
    }
    set(key, value) {
        const entry = { value, expires: Date.now() + this.ttl };
        if (this.cache.has(key)) {
            this.cache.delete(key);
        }
        this.cache.set(key, entry);
        if (this.cache.size > this.maxSize) {
            const firstKey = this.cache.keys().next().value;
            if (firstKey !== undefined) {
                this.cache.delete(firstKey);
            }
        }
    }
    clear() {
        this.cache.clear();
    }
}
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