Function memoizeWithLRU

source code/utils/memoize.ts:236–271

(
  f: (...args: Args) => Result,
  cacheFn: (...args: Args) => string,
  maxCacheSize: number = 100,
)

 * @returns A memoized version of the function with cache management methods
 */
export function memoizeWithLRU<
  Args extends unknown[],
  Result extends NonNullable<unknown>,
>(
  f: (...args: Args) => Result,
  cacheFn: (...args: Args) => string,
  maxCacheSize: number = 100,
): LRUMemoizedFunction<Args, Result> {
  const cache = new LRUCache<string, Result>({
    max: maxCacheSize,
  })

  const memoized = (...args: Args): Result => {
    const key = cacheFn(...args)
    const cached = cache.get(key)
    if (cached !== undefined) {
      return cached
    }

    const result = f(...args)
    cache.set(key, result)
    return result
  }

  // Add cache management methods
  memoized.cache = {
    clear: () => cache.clear(),
    size: () => cache.size,
    delete: (key: string) => cache.delete(key),
    // peek() avoids updating recency — we only want to observe, not promote
    get: (key: string) => cache.peek(key),
    has: (key: string) => cache.has(key),
  }

  return memoized
}