quartz-research-note/quartz/plugins/emitters/contentIndex.ts

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import { visit } from "unist-util-visit"
import { QuartzEmitterPlugin } from "../types"
import { Element } from "hast"
import path from "path"
import { trimPathSuffix } from "../../path"
interface Options {
indexAnchorLinks: boolean,
indexExternalLinks: boolean,
}
const defaultOptions: Options = {
indexAnchorLinks: false,
indexExternalLinks: false,
}
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export type ContentIndex = Map<string, ContentDetails>
export type ContentDetails = {
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title: string,
links?: string[],
tags?: string[],
content: string,
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}
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export const ContentIndex: QuartzEmitterPlugin<Options> = (userOpts) => {
const opts = { ...userOpts, ...defaultOptions }
return {
name: "ContentIndex",
async emit(_contentDir, _cfg, content, _resources, emit) {
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const fp = path.join("static", "contentIndex")
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const linkIndex: ContentIndex = new Map()
for (const [tree, file] of content) {
let slug = trimPathSuffix(file.data.slug!)
const outgoing: Set<string> = new Set()
visit(tree, 'element', (node: Element) => {
if (node.tagName === 'a' && node.properties && typeof node.properties.href === 'string') {
let dest = node.properties.href
if (dest.startsWith(".")) {
const normalizedPath = path.normalize(path.join(slug, dest))
dest = trimPathSuffix(normalizedPath)
outgoing.add(dest)
} else if (dest.startsWith("#")) {
if (opts.indexAnchorLinks) {
outgoing.add(dest)
}
} else {
if (opts.indexExternalLinks) {
outgoing.add(dest)
}
}
}
})
linkIndex.set(slug, {
title: file.data.frontmatter?.title!,
links: [...outgoing],
tags: file.data.frontmatter?.tags,
content: file.data.text ?? ""
})
}
await emit({
content: JSON.stringify(Object.fromEntries(linkIndex)),
slug: fp,
ext: ".json",
})
return [`${fp}.json`]
},
getQuartzComponents: () => [],
}
}