export interface LinkMetadata {
  url: string;
  title: string | null;
  description: string | null;
  image: string | null;
  favicon: string | null;
  domain: string;
}

const URL_REGEX = /https?:\/\/[^\s<>"')\]]+/g;

export function extractUrls(text: string): string[] {
  // Dedupe: a URL repeated in the text (e.g. a `[url](url)` markdown link)
  // should only yield a single preview card.
  return Array.from(new Set(Array.from(text.matchAll(URL_REGEX), (m) => m[0])));
}