rename.js

import { resolve } from "path";
import { promises } from "fs";

const { readdir, rename } = promises;

const DIRECTORY = "src/lib/sprites/objects";

async function getFiles(dir) {
	const dirents = await readdir(dir, { withFileTypes: true });
	const files = [];
	for (const dirent of dirents) {
		const res = resolve(dir, dirent.name);
		if (dirent.isFile()) {
			files.push(res);
		}
	}
	return files.reverse();
}

const files = await getFiles(DIRECTORY);
for (let idx = 0; idx < files.length; idx++) {
	const originalFilePath = files[idx];

	/** @type {string[]} */
	const parts = originalFilePath.split(".");
	const pathParts = parts[0].split("/");

	/**
	 * @type {string}
	 */
	// eslint-disable-next-line @typescript-eslint/ban-ts-comment
	// @ts-ignore
	const fileName = pathParts.pop()?.replace("tile", "");

	parts[0] = `${pathParts.join("/")}/${parseInt(fileName) + 1}`;
	const newFilePath = parts.join(".");

	await rename(originalFilePath, newFilePath);
}