import matter from 'gray-matter';
import { DocumentMeta } from '../types.js';
/**
* Parse frontmatter and content from a markdown string
* @param markdown The markdown string to parse
* @returns Object containing parsed metadata and content
*/
export function parseFrontmatter(markdown: string): { meta: DocumentMeta; content: string } {
const { data, content } = matter(markdown);
// Ensure title is present
const meta: DocumentMeta = {
title: data.title || 'Untitled Document',
...data,
};
// Keep dates as strings if they're provided that way
// (We don't want to convert them to Date objects automatically)
return { meta, content };
}
/**
* Generate markdown with frontmatter
* @param meta Document metadata
* @param content Document content
* @returns Markdown string with frontmatter
*/
export function generateFrontmatter(meta: DocumentMeta, content: string): string {
// Ensure updatedAt is set to current date
const updatedMeta = {
...meta,
updatedAt: new Date().toISOString()
};
// If createdAt isn't set, set it to the current date
if (!updatedMeta.createdAt) {
updatedMeta.createdAt = updatedMeta.updatedAt;
}
// Sanitize metadata by removing undefined values
// to prevent YAML serialization errors
const sanitizedMeta: DocumentMeta = {
title: updatedMeta.title || 'Untitled Document'
};
Object.entries(updatedMeta).forEach(([key, value]) => {
if (value !== undefined) {
sanitizedMeta[key] = value;
}
});
return matter.stringify(content, sanitizedMeta);
}
