proxiedFilru.ts
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proxiedFilru.ts
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	import Filru from "filru";
	/**
	* Returns a proxied instance of Filru with error handling for the "get" method.
	* The original Filru throws an error when a requested key is not found,
	* and this proxy ensures that the "get" method returns null instead of propagating the error.
	* @param dir - The directory path for Filru.
	* @param maxBytes - The maximum size of the cache in bytes.
	* @param maxAge - The maximum age of an item in milliseconds.
	* @param hashSeed - The seed used for hashing keys.
	* @param pruneInterval - The interval at which to prune expired items.
	* @returns Proxied Filru instance with error-handled "get" method.
	*/
	function getProxiedFilru(
	dir: string,
	maxBytes: number,
	maxAge: number,
	hashSeed: string,
	pruneInterval: number
	): Filru {
	const filru = new Filru({ dir, maxBytes, maxAge, hashSeed, pruneInterval });
	const handler = {
	get(target: Filru, prop: string): unknown {
	if (prop === "get") {
	return async (hash: string): Promise<Buffer \| null> => {
	try {
	return await target.get(hash);
	} catch (error: unknown) {
	if (
	error instanceof Error &&
	error.message.includes(
	"ENOENT: no such file or directory, open"
	)
	) {
	return null;
	} else {
	throw error;
	}
	}
	};
	}
	return Reflect.get(target, prop);
	},
	};
	return new Proxy<Filru>(filru, handler);
	}

	export default getProxiedFilru;