limitless-mcp/dist/cache/index.js

MCP server for Limitless API - Connect your Pendant data to Claude and other LLMs

/**
 * Cache management module for Limitless MCP server
 */
import NodeCache from 'node-cache';
import config from '../config.js';
// Initialize cache with configuration settings
const cache = new NodeCache({
    stdTTL: config.CACHE_TTL,
    checkperiod: config.CACHE_CHECK_PERIOD,
    maxKeys: config.CACHE_MAX_KEYS,
    useClones: true
});
// Set up periodic cache statistics reporting
setInterval(() => {
    const stats = cache.getStats();
    console.error(`Cache stats: ${stats.keys} keys, ${stats.hits} hits, ${stats.misses} misses, Hit rate: ${(stats.hits / (stats.hits + stats.misses) || 0).toFixed(2)}`);
}, 300000); // Report every 5 minutes
/**
 * Calculate an appropriate TTL based on the data type and path
 */
export function calculateTTL(path, queryParams) {
    let ttl = config.CACHE_TTL;
    // Single lifelog metadata (cached longer since they rarely change)
    if (path.includes('/lifelogs/') && !queryParams.includeMarkdown) {
        ttl = config.CACHE_TTL * config.CACHE_TTL_MULTIPLIERS.METADATA;
        console.error(`Using metadata TTL multiplier: ${config.CACHE_TTL_MULTIPLIERS.METADATA}x`);
    }
    // Lifelog listings (cached moderately long)
    else if (path === '/lifelogs' && queryParams.limit) {
        ttl = config.CACHE_TTL * config.CACHE_TTL_MULTIPLIERS.LISTINGS;
        console.error(`Using listings TTL multiplier: ${config.CACHE_TTL_MULTIPLIERS.LISTINGS}x`);
    }
    // Search results (moderate caching)
    else if (queryParams.query) {
        ttl = config.CACHE_TTL * config.CACHE_TTL_MULTIPLIERS.SEARCH;
        console.error(`Using search TTL multiplier: ${config.CACHE_TTL_MULTIPLIERS.SEARCH}x`);
    }
    return ttl;
}
/**
 * Get tags for a cache entry based on the path and query parameters
 */
export function getCacheTags(path, queryParams) {
    const tags = [];
    if (path.includes('/lifelogs/')) {
        tags.push('single_lifelog');
        if (queryParams.includeMarkdown) {
            tags.push('full_content');
        }
        else {
            tags.push('metadata_only');
        }
    }
    else if (path === '/lifelogs') {
        tags.push('lifelog_listings');
        if (queryParams.date)
            tags.push(`date:${queryParams.date}`);
    }
    return tags;
}
export default cache;