export const BOOK_COVER_PLACEHOLDER = '/assets/books/placeholder.jpg';

export const bookCoverUrl = (value?: string | null): string => {
  if (!value) return BOOK_COVER_PLACEHOLDER;
  if (value.startsWith('/assets/') || value.startsWith('http://') || value.startsWith('https://')) {
    return value;
  }
  return BOOK_COVER_PLACEHOLDER;
};