81 lines
2.8 KiB
TypeScript
81 lines
2.8 KiB
TypeScript
import type { AstroMarkdownOptions, MarkdownRenderingOptions } from './types';
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import createCollectHeaders from './rehype-collect-headers.js';
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import scopedStyles from './remark-scoped-styles.js';
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import remarkExpressions from './remark-expressions.js';
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import rehypeExpressions from './rehype-expressions.js';
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import { rehypeCodeBlock } from './codeblock.js';
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import { loadPlugins } from './load-plugins.js';
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import raw from 'rehype-raw';
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import unified from 'unified';
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import markdown from 'remark-parse';
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import markdownToHtml from 'remark-rehype';
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import rehypeStringify from 'rehype-stringify';
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export { AstroMarkdownOptions, MarkdownRenderingOptions };
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/** Internal utility for rendering a full markdown file and extracting Frontmatter data */
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export async function renderMarkdownWithFrontmatter(contents: string, opts?: MarkdownRenderingOptions | null) {
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// Dynamic import to ensure that "gray-matter" isn't built by Snowpack
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const { default: matter } = await import('gray-matter');
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const { data: frontmatter, content } = matter(contents);
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const value = await renderMarkdown(content, opts);
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return { ...value, frontmatter };
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}
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/** Shared utility for rendering markdown */
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export async function renderMarkdown(content: string, opts?: MarkdownRenderingOptions | null) {
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const { $: { scopedClassName = null } = {}, footnotes: useFootnotes = true, gfm: useGfm = true, remarkPlugins = [], rehypePlugins = [] } = opts ?? {};
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const { headers, rehypeCollectHeaders } = createCollectHeaders();
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let parser = unified()
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.use(markdown)
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.use([remarkExpressions, { addResult: true }]);
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if (remarkPlugins.length === 0) {
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if (useGfm) {
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remarkPlugins.push('remark-gfm');
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}
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if (useFootnotes) {
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remarkPlugins.push('remark-footnotes');
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}
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remarkPlugins.push('@silvenon/remark-smartypants');
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}
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const loadedRemarkPlugins = await Promise.all(loadPlugins(remarkPlugins));
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const loadedRehypePlugins = await Promise.all(loadPlugins(rehypePlugins));
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loadedRemarkPlugins.forEach(([plugin, opts]) => {
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parser.use(plugin, opts);
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});
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if (scopedClassName) {
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parser.use(scopedStyles(scopedClassName));
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}
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parser.use(markdownToHtml, { allowDangerousHtml: true, passThrough: ['raw', 'mdxTextExpression'] });
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parser.use(rehypeExpressions);
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loadedRehypePlugins.forEach(([plugin, opts]) => {
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parser.use(plugin, opts);
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});
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let result: string;
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try {
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const vfile = await parser
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.use(raw)
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.use(rehypeCollectHeaders)
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.use(rehypeCodeBlock())
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.use(rehypeStringify, { entities: { useNamedReferences: true } })
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.process(content);
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result = vfile.contents.toString();
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} catch (err) {
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throw err;
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}
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return {
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astro: { headers, source: content, html: result.toString() },
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content: result.toString(),
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};
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}
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