/**
* Markdown parsing utilities
*/
/**
* Strip wiki-link syntax from text, keeping the display text or target
* [[target|display]] → display
* [[target]] → target
*/
export function stripWikiLinks(text: string): string {
return text
.replace(/\[\[([^\]|]+)\|([^\]]+)\]\]/g, '$2') // [[target|display]] → display
.replace(/\[\[([^\]]+)\]\]/g, '$1'); // [[target]] → target
}
/**
* Extract the title from markdown content (first H1)
* Strips wiki-link syntax from the extracted title
*/
export function extractTitle(content: string): string | null {
const match = content.match(/^#\s+(.+)$/m);
const rawTitle = match?.[1]?.trim() ?? null;
return rawTitle ? stripWikiLinks(rawTitle) : null;
}
/**
* Extract all headings from markdown
* Strips wiki-link syntax from heading text
*/
export function extractHeadings(
content: string
): Array<{ level: number; text: string; position: number }> {
const headings: Array<{ level: number; text: string; position: number }> = [];
const regex = /^(#{1,6})\s+(.+)$/gm;
let match;
while ((match = regex.exec(content)) !== null) {
headings.push({
level: match[1]!.length,
text: stripWikiLinks(match[2]!.trim()),
position: match.index,
});
}
return headings;
}
/**
* Extract text content, stripping markdown formatting
*/
export function stripMarkdown(content: string): string {
return content
.replace(/```[\s\S]*?```/g, '') // Remove code blocks
.replace(/`[^`]+`/g, '') // Remove inline code
.replace(/\[\[([^\]|]+)(?:\|([^\]]+))?\]\]/g, '$2$1') // Wiki-links to text
.replace(/\[([^\]]+)\]\([^)]+\)/g, '$1') // Regular links to text
.replace(/[*_~`#]/g, '') // Remove formatting chars
.replace(/\n+/g, ' ') // Collapse newlines
.replace(/\s+/g, ' ') // Collapse spaces
.trim();
}
/**
* Get a snippet of text around a position
*/
export function getSnippet(
content: string,
position: number,
radius = 50
): string {
const start = Math.max(0, position - radius);
const end = Math.min(content.length, position + radius);
let snippet = content.slice(start, end);
if (start > 0) snippet = '...' + snippet;
if (end < content.length) snippet = snippet + '...';
return snippet.replace(/\n/g, ' ').trim();
}
/**
* Count words in content
*/
export function wordCount(content: string): number {
const text = stripMarkdown(content);
return text.split(/\s+/).filter((word) => word.length > 0).length;
}
/**
* Check if content is empty (only whitespace or frontmatter)
*/
export function isEmptyContent(body: string): boolean {
return body.trim().length === 0;
}
