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silverbullet/plugs/index/paragraph.ts

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import type { IndexTreeEvent } from "$sb/app_event.ts";
import { indexObjects } from "./api.ts";
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import {
addParentPointers,
collectNodesOfType,
findParentMatching,
renderToText,
traverseTreeAsync,
} from "$sb/lib/tree.ts";
import { extractAttributes } from "$sb/lib/attribute.ts";
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import { ObjectValue } from "$sb/types.ts";
/** ParagraphObject An index object for the top level text nodes */
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export type ParagraphObject = ObjectValue<
{
text: string;
page: string;
pos: number;
} & Record<string, any>
>;
export async function indexParagraphs({ name: page, tree }: IndexTreeEvent) {
const objects: ParagraphObject[] = [];
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addParentPointers(tree);
await traverseTreeAsync(tree, async (p) => {
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if (p.type !== "Paragraph") {
return false;
}
if (findParentMatching(p, (n) => n.type === "ListItem")) {
// Not looking at paragraphs nested in a list
return false;
}
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// So we're looking at indexable a paragraph now
const tags = new Set<string>(["paragraph"]);
// tag the paragraph with any hashtags inside it
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collectNodesOfType(p, "Hashtag").forEach((tagNode) => {
tags.add(tagNode.children![0].text!.substring(1));
});
const attrs = await extractAttributes(p, false);
const pos = p.from!;
objects.push({
ref: `${page}@${pos}`,
text: renderToText(p),
tags: [...tags.values()],
page,
pos,
...attrs,
});
// stop on every element except document, including paragraphs
return true;
});
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// console.log("Paragraph objects", objects);
await indexObjects<ParagraphObject>(page, objects);
}