unstorage/drivers/lru-cache.mjs

Universal Storage Layer

import { defineDriver } from "./utils/index.mjs";
import LRU from "lru-cache";
export default defineDriver((opts = {}) => {
  const cache = new LRU({
    max: 1e3,
    sizeCalculation: opts.maxSize || opts.maxEntrySize ? (value, key) => {
      return key.length + byteLength(value);
    } : void 0,
    ...opts
  });
  return {
    name: "lru-cache",
    options: opts,
    hasItem(key) {
      return cache.has(key);
    },
    getItem(key) {
      return cache.get(key) || null;
    },
    getItemRaw(key) {
      return cache.get(key) || null;
    },
    setItem(key, value) {
      cache.set(key, value);
    },
    setItemRaw(key, value) {
      cache.set(key, value);
    },
    removeItem(key) {
      cache.delete(key);
    },
    getKeys() {
      return Array.from(cache.keys());
    },
    clear() {
      cache.clear();
    },
    dispose() {
      cache.clear();
    }
  };
});
function byteLength(value) {
  if (typeof Buffer !== void 0) {
    try {
      return Buffer.byteLength(value);
    } catch {
    }
  }
  try {
    return typeof value === "string" ? value.length : JSON.stringify(value).length;
  } catch {
  }
  return 0;
}