@directus/api/dist/permissions/utils/with-cache.js

Directus is a real-time API and App dashboard for managing SQL database content

import { useCache } from "../cache.js";
import { getSimpleHash } from "@directus/utils";

//#region src/permissions/utils/with-cache.ts
/**
* Wraps a function with caching capabilities.
*
* @param namespace - A unique namespace for the cache key.
* @param handler - The function to be wrapped.
* @param prepareArg - Optional function to prepare arguments for hashing.
* @returns A new function that caches the results of the original function.
*
* @NOTE Ensure that the `namespace` is unique to avoid cache key collisions.
* @NOTE Ensure that the `prepareArg` function returns a JSON stringifiable representation of the arguments.
*/
function withCache(namespace, handler, prepareArg) {
	const cache = useCache();
	return async (...args) => {
		const hashArgs = prepareArg ? prepareArg(...args) : args;
		const key = namespace + "-" + getSimpleHash(JSON.stringify(hashArgs));
		const cached = await cache.get(key);
		if (cached !== void 0) return cached;
		const res = await handler(...args);
		cache.set(key, res);
		return res;
	};
}

//#endregion
export { withCache };