frontmatter.ts

export function parseFrontmatter(content: string): { frontmatter: Record<string, string>; body: string } {
	const frontmatter: Record<string, string> = {};
	const normalized = content.replace(/\r\n/g, "\n");

	if (!normalized.startsWith("---")) {
		return { frontmatter, body: normalized };
	}

	const endIndex = normalized.indexOf("\n---", 3);
	if (endIndex === -1) {
		return { frontmatter, body: normalized };
	}

	const frontmatterBlock = normalized.slice(4, endIndex);
	const body = normalized.slice(endIndex + 4).trim();

	for (const line of frontmatterBlock.split("\n")) {
		const match = line.match(/^([\w-]+):\s*(.*)$/);
		if (match) {
			let value = match[2].trim();
			if ((value.startsWith('"') && value.endsWith('"')) || (value.startsWith("'") && value.endsWith("'"))) {
				value = value.slice(1, -1);
			}
			frontmatter[match[1]] = value;
		}
	}

	return { frontmatter, body };
}