50 lines
1.2 KiB
TypeScript
50 lines
1.2 KiB
TypeScript
import { Root as HTMLRoot } from 'hast'
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import { toString } from "hast-util-to-string"
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import { QuartzTransformerPlugin } from "../types"
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export interface Options {
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descriptionLength: number
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}
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const defaultOptions: Options = {
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descriptionLength: 150
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}
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export const Description: QuartzTransformerPlugin<Partial<Options> | undefined> = (userOpts) => {
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const opts = { ...defaultOptions, ...userOpts }
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return {
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name: "Description",
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htmlPlugins() {
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return [
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() => {
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return async (tree: HTMLRoot, file) => {
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const frontMatterDescription = file.data.frontmatter?.description
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const text = toString(tree)
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const desc = frontMatterDescription ?? text
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const sentences = desc.replace(/\s+/g, ' ').split('.')
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let finalDesc = ""
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let sentenceIdx = 0
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const len = opts.descriptionLength
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while (finalDesc.length < len) {
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finalDesc += sentences[sentenceIdx] + '.'
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sentenceIdx++
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}
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file.data.description = finalDesc
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file.data.text = text
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}
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}
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]
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}
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}
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}
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declare module 'vfile' {
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interface DataMap {
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description: string
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text: string
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}
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}
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