const RICH_TEXT_TAG = /<(?:p|h[1-6]|ul|ol|li|blockquote|strong|em|u|s|a|br|hr|span)\b/i

export function escapeRichText(value: string) {
  return value
    .replaceAll('&', '&amp;')
    .replaceAll('<', '&lt;')
    .replaceAll('>', '&gt;')
    .replaceAll('"', '&quot;')
    .replaceAll("'", '&#039;')
}

export function toEditorHtml(value: string) {
  if (!value.trim()) return '<p></p>'
  if (RICH_TEXT_TAG.test(value)) return value

  return value
    .split(/\n{2,}/)
    .map(paragraph => `<p>${escapeRichText(paragraph).replaceAll('\n', '<br>')}</p>`)
    .join('')
}

export function toDisplayHtml(value: string) {
  return toEditorHtml(value || '')
}