import { readFile, rename, writeFile } from 'node:fs/promises';
import { paths } from '../../config/paths.mjs';
import { httpError } from '../../shared/http/httpError.mjs';

export async function readArticles() {
  const raw = await readFile(paths.articlesFile, 'utf8');
  const articles = JSON.parse(raw);

  if (!Array.isArray(articles)) {
    throw httpError(500, 'Article database must be a JSON array');
  }

  return articles;
}

export async function writeArticles(articles) {
  const temporaryFile = `${paths.articlesFile}.${process.pid}.tmp`;
  await writeFile(temporaryFile, `${JSON.stringify(articles, null, 2)}\n`, 'utf8');
  await rename(temporaryFile, paths.articlesFile);
}