export function extractHiddenField(html: string, name: string): string {
  const re = new RegExp(`id="${name}"[^>]*value="([^"]*)"`, "i");
  const match = html.match(re);
  if (match) return match[1];
  const re2 = new RegExp(`name="${name}"[^>]*value="([^"]*)"`, "i");
  const match2 = html.match(re2);
  return match2?.[1] ?? "";
}

export function stripTags(html: string): string {
  return html.replace(/<[^>]*>/g, "").trim();
}

export function decodeHtmlEntities(text: string): string {
  return text
    .replace(/&nbsp;/g, " ")
    .replace(/&amp;/g, "&")
    .replace(/&lt;/g, "<")
    .replace(/&gt;/g, ">")
    .replace(/&quot;/g, "\"")
    .replace(/&#(\d+);/g, (_, n) => String.fromCharCode(Number(n)));
}

export function padCell(val: string, w: number): string {
  const displayWidth = [...val].reduce(
    (sum, ch) => sum + (ch.charCodeAt(0) > 0x7f ? 2 : 1),
    0
  );
  return val + " ".repeat(Math.max(0, w - displayWidth));
}