next/lib/server/storyHelpers/replaceGridFS.ts

import getBucket from "./getBucket";
import { Readable } from "stream";
export default async function replaceGridFS(chapterID: number | undefined, content: string) {
	let filename = `/stories/${chapterID}.txt`;
	const bucket = getBucket();
	if (chapterID) {
		const curs = bucket.find({ filename }).limit(1);
		for await (const d of curs) {
			await bucket.delete(d._id);
		}
	}
	const readable = new Readable();
	readable.push(content);
	readable.push(null);
	readable.pipe(bucket.openUploadStream(filename));
}