/**
 * Strip HTML tags from a string and return the plain text.
 * Uses DOMParser in the browser, falls back to a regex strip on the server
 * (where DOMParser is not available without isomorphic-dompurify's JSDOM).
 */
export function stripHtml(html: string | null | undefined): string {
	if (!html) return '';
	if (typeof DOMParser === 'function') {
		const doc = new DOMParser().parseFromString(html, 'text/html');
		return (doc.body.textContent ?? '').trim();
	}
	return html.replace(/<[^>]*>/g, '').trim();
}

/**
 * Strip HTML and truncate to a maximum length, appending an ellipsis when
 * the source exceeds it. Used for editorial story excerpts.
 */
export function plainExcerpt(html: string | null | undefined, max = 80): string {
	const text = stripHtml(html);
	if (text.length <= max) return text;
	return text.slice(0, max).replace(/\s+\S*$/, '') + '…';
}