get blog posts from MDX files into an index file

getMDXPostsNext.tsx

import fs from "fs";
import path from "path";

export const getPostsData = () => {
	const META = /export\s+const\s+meta\s+=\s+(\{(\n|.)*?\n\})/;
	const DIR = path.join(process.cwd(), "content/blog");
	const files = fs.readdirSync(DIR).filter((file) => file.endsWith(".mdx"));

	const postsData: Array<TBlogPost> = files
		.map((file) => {
			const name = path.join(DIR, file);
			const contents = fs.readFileSync(name, "utf8");
			const match = META.exec(contents);

			if (!match || typeof match[1] !== "string")
				throw new Error(`${name} needs to export const meta = {}`);

			const meta = eval("(" + match[1] + ")");

			return {
				...meta,
				slug: file.replace(/\.mdx?$/, ""),
			};
		})
		.filter(
			(meta) => process.env.NODE_ENV === "development" || meta.published
		)
		.sort((a, b) => {
			return (
				new Date(b.publishedAt).getTime() -
				new Date(a.publishedAt).getTime()
			);
		});

	return postsData;
};