import matter from "gray-matter"
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import remarkFrontmatter from 'remark-frontmatter'
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import { QuartzTransformerPlugin } from "../types"
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export interface Options {
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language: 'yaml' | 'toml',
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delims: string | string[]
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}
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const defaultOptions: Options = {
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language: 'yaml',
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delims: '---'
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}
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export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined> = (userOpts) => {
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const opts = { ...defaultOptions, ...userOpts }
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return {
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name: "FrontMatter",
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markdownPlugins() {
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return [
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remarkFrontmatter,
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() => {
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return (_, file) => {
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const { data } = matter(file.value, opts)
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if (typeof data.tags === 'string') {
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data.tags = data.tags.split(" ")
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}
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// fill in frontmatter
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file.data.frontmatter = {
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title: file.stem ?? "Untitled",
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tags: [],
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...data
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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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}
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declare module 'vfile' {
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interface DataMap {
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frontmatter: { [key: string]: any } & {
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title: string
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tags: string[]
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}
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}
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}
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