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import { memoize } from 'lodash';
const parser = new DOMParser();
export default ({ renderMarkdown }) => ({
resolveUrl: memoize(async (canonicalSrc) => {
const html = await renderMarkdown(`[link](${canonicalSrc})`);
if (!html) return canonicalSrc;
const { body } = parser.parseFromString(html, 'text/html');
return body.querySelector('a').getAttribute('href');
}),
renderDiagram: memoize(async (code, language) => {
const backticks = '`'.repeat(4);
const html = await renderMarkdown(`${backticks}${language}\n${code}\n${backticks}`);
const { body } = parser.parseFromString(html, 'text/html');
const img = body.querySelector('img');
if (!img) return '';
return img.dataset.src || img.getAttribute('src');
}),
});
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