import { fetchShelf } from '../../src/shelves';
import { fetchPost } from '../../src/posts';
import { fetchPostComments } from '../../src/comments';

async function getPageData(pageContext) {
	const [shelf, post, comments] = await Promise.all([
		fetchShelf(pageContext.routeParams.shelfId),
		fetchPost(pageContext.routeParams.postId, pageContext.session.user),
		fetchPostComments(pageContext.routeParams.postId),
	]);

	if (!shelf) {
		throw new Error('This shelf does not exist');
	}

	if (!post) {
		throw new Error('This post does not exist');
	}

	return {
		shelf,
		post,
		comments,
	};
}

export { getPageData };