import { formatDate } from '$lib/shared/utils/date';

type AuthorSummary = { firstName?: string; lastName?: string; email: string };
type AuthorView = { displayName: string };

export function formatAuthorName(author: AuthorSummary | null | undefined): string {
	if (!author) return '';
	const full = [author.firstName, author.lastName].filter(Boolean).join(' ').trim();
	return full || author.email || '';
}

export function formatAuthorDisplayName(author: AuthorView | null | undefined): string {
	return author?.displayName ?? '';
}

export function formatPublishedAt(
	publishedAt: string | null | undefined,
	style: 'short' | 'long' = 'short'
): string | null {
	if (!publishedAt) return null;
	return formatDate(publishedAt.slice(0, 10), style);
}