@naturalcycles/js-lib/dist/decorators/memoFnAsync.js

Standard library for universal (browser + Node.js) javascript

import { MISS } from '../types.js';
import { jsonMemoSerializer, MapMemoCache } from './memo.util.js';
/**
 * @experimental
 */
export function _memoFnAsync(fn, opt) {
    const { logger = console, cacheFactory = () => new MapMemoCache(), cacheKeyFn = jsonMemoSerializer, } = opt;
    const cache = cacheFactory();
    const memoizedFn = async function (...args) {
        const ctx = this;
        const cacheKey = cacheKeyFn(args);
        let value;
        try {
            value = await cache.get(cacheKey);
        }
        catch (err) {
            logger.error(err);
        }
        if (value !== MISS) {
            return value;
        }
        value = await fn.apply(ctx, args);
        void (async () => {
            try {
                await cache.set(cacheKey, value);
            }
            catch (err) {
                logger.error(err);
            }
        })();
        return value;
    };
    Object.assign(memoizedFn, { cache });
    return memoizedFn;
}