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30 changes: 28 additions & 2 deletions lib/slugifyMarkdownHeadline.ts
Original file line number Diff line number Diff line change
Expand Up @@ -4,23 +4,49 @@ export default function slugifyMarkdownHeadline(
markdownChildren: string | any[],
): string {
const FRAGMENT_REGEX = /\[#(?<slug>(\w|-|_)*)\]/g;

if (!markdownChildren) return '';

if (typeof markdownChildren === 'string')
return slugify(markdownChildren, { lower: true, trim: true });
return slugify(markdownChildren, {
lower: true,

trim: true,

remove: /[*+~()'"!]/g,
});

const metaSlug = markdownChildren.reduce((acc, child) => {
if (acc) return acc;

if (typeof child !== 'string') return null;

const fragment = FRAGMENT_REGEX.exec(child);

if (!fragment) return null;

const slug = fragment?.groups?.slug;

return slug || null;
}, null);

if (metaSlug) return metaSlug;

const joinedChildren = markdownChildren

.filter((child) => typeof child === 'string')

.map((string) => string.replace(FRAGMENT_REGEX, ''))

.join(' ');
const slug = slugify(joinedChildren, { lower: true, trim: true });

const slug = slugify(joinedChildren, {
lower: true,

trim: true,

remove: /[*+~()'"!]/g,
});

return slug;
}
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