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import type { MarkdownHeading } from '@astrojs/markdown-remark';
import Markdoc, {
type RenderableTreeNode,
type ConfigType as MarkdocConfig,
} from '@markdoc/markdoc';
import type { ContentEntryModule } from 'astro';
import { nodes as astroNodes } from './nodes/index.js';
/** Used to reset Slugger cache on each build at runtime */
export { headingSlugger } from './nodes/index.js';
export { default as Markdoc } from '@markdoc/markdoc';
export function applyDefaultConfig(
config: MarkdocConfig,
entry: ContentEntryModule
): MarkdocConfig {
return {
...config,
variables: {
entry,
...config.variables,
},
nodes: {
...astroNodes,
...config.nodes,
},
// TODO: Syntax highlighting
};
}
/**
* Get text content as a string from a Markdoc transform AST
*/
export function getTextContent(childNodes: RenderableTreeNode[]): string {
let text = '';
for (const node of childNodes) {
if (typeof node === 'string' || typeof node === 'number') {
text += node;
} else if (typeof node === 'object' && Markdoc.Tag.isTag(node)) {
text += getTextContent(node.children);
}
}
return text;
}
const headingLevels = [1, 2, 3, 4, 5, 6] as const;
/**
* Collect headings from Markdoc transform AST
* for `headings` result on `render()` return value
*/
export function collectHeadings(children: RenderableTreeNode[]): MarkdownHeading[] {
let collectedHeadings: MarkdownHeading[] = [];
for (const node of children) {
if (typeof node !== 'object' || !Markdoc.Tag.isTag(node)) continue;
if (node.attributes.__collectHeading === true && typeof node.attributes.level === 'number') {
collectedHeadings.push({
slug: node.attributes.id,
depth: node.attributes.level,
text: getTextContent(node.children),
});
continue;
}
for (const level of headingLevels) {
if (node.name === 'h' + level) {
collectedHeadings.push({
slug: node.attributes.id,
depth: level,
text: getTextContent(node.children),
});
}
}
collectedHeadings.concat(collectHeadings(node.children));
}
return collectedHeadings;
}
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