contentlayer.config.ts

import {
  ComputedFields,
  defineDocumentType,
  makeSource,
} from "contentlayer-temp/source-files"
import readingTime from "reading-time"
import rehypeAutolinkHeadings from "rehype-autolink-headings"
import rehypePrettyCode, { type Options } from "rehype-pretty-code"
// Rehype packages
import rehypeSlug from "rehype-slug"

// Remark packages

import siteMetadata from "./config/site-metadata"

const computedFields: ComputedFields = {
  readingTime: { type: "json", resolve: (doc) => readingTime(doc.body.raw) },
  slug: {
    type: "string",
    resolve: (doc) => doc._raw.flattenedPath.replace(/^.+?(\/)/, ""),
  },
  slugAsParams: {
    type: "string",
    resolve: (doc) => doc._raw.flattenedPath.split("/").slice(1).join("/"),
  },
  path: {
    type: "string",
    resolve: (doc) => doc._raw.flattenedPath,
  },
  filePath: {
    type: "string",
    resolve: (doc) => doc._raw.sourceFilePath,
  },
}

const genOgUrl = (title: string) => {
  const ogUrl = new URL(`${siteMetadata.siteUrl}/api/og`)
  ogUrl.searchParams.set("heading", title)
  ogUrl.searchParams.set("type", "Blog Post")
  ogUrl.searchParams.set("mode", "dark")
  return ogUrl.toString()
}

export const Blog = defineDocumentType(() => ({
  name: "Blog",
  filePathPattern: "blog/**/*.mdx",
  contentType: "mdx",
  fields: {
    title: { type: "string", required: true },
    date: { type: "date", required: true },
    tags: { type: "list", of: { type: "string" } },
    lastmod: { type: "date" },
    draft: { type: "boolean" },
    summary: { type: "string" },
    images: { type: "list", of: { type: "string" } },
    authors: { type: "list", of: { type: "string" } },
    layout: { type: "string" },
    bibliography: { type: "string" },
    canonicalUrl: { type: "string" },
  },
  computedFields: {
    ...computedFields,
    structuredData: {
      type: "json",
      resolve: (doc) => ({
        "@context": "https://schema.org",
        "@type": "BlogPosting",
        headline: doc.title,
        datePublished: doc.date,
        dateModified: doc.lastmod || doc.date,
        description: doc.summary,
        image: genOgUrl(doc.title),
        url: `${siteMetadata.siteUrl}/${doc._raw.flattenedPath}`,
      }),
    },
  },
}))

export const Authors = defineDocumentType(() => ({
  name: "Authors",
  filePathPattern: "authors/**/*.mdx",
  contentType: "mdx",
  fields: {
    name: { type: "string", required: true },
    avatar: { type: "string" },
    occupation: { type: "string" },
    company: { type: "string" },
    email: { type: "string" },
    twitter: { type: "string" },
    linkedin: { type: "string" },
    github: { type: "string" },
    layout: { type: "string" },
    youtube: { type: "string" },
  },
  computedFields,
}))

const prettyOptions: Options = {
  theme: "github-dark",
  grid: true,
  keepBackground: false,
  onVisitHighlightedLine(node) {
    node.properties.className?.push("line--highlighted")
  },
  onVisitHighlightedChars(node) {
    node.properties.className = ["word--highlighted"]
  },
}

export default makeSource({
  contentDirPath: "data",
  documentTypes: [Blog, Authors],
  mdx: {
    rehypePlugins: [
      rehypeSlug,
      [rehypePrettyCode as any, prettyOptions],
      [
        rehypeAutolinkHeadings,
        {
          properties: {
            className: ["subheading-anchor"],
            ariaLabel: "Link to section",
          },
        },
      ],
    ],
  },
})