export type AuthorDisplay = {
  origin: string;
  username: string;
  name: string | null;
  remote_display_name?: string | null;
  source_base_url: string | null;
};

export function postAuthorLabel(post: AuthorDisplay) {
  const linkedMemos = post.origin === "memos" || post.origin === "hub";
  const author = linkedMemos ? (post.remote_display_name || post.name || post.username) : (post.name || post.username);
  if (linkedMemos && post.source_base_url) {
    try { return `@${author}@${new URL(post.source_base_url).hostname}`; } catch { /* Keep a readable fallback for legacy malformed URLs. */ }
  }
  return `@${author}${post.name ? ` · ${post.name}` : ""}`;
}