contentlayer.config.ts

/* eslint-disable @typescript-eslint/no-explicit-any */
import { defineDocumentType, ComputedFields, makeSource } from 'contentlayer/source-files'
import readingTime from 'reading-time'
import path from 'path'
// Remark packages
import remarkGfm from 'remark-gfm'
import remarkMath from 'remark-math'
import {
  remarkExtractFrontmatter,
  remarkCodeTitles,
  remarkImgToJsx,
  extractTocHeadings,
} from 'pliny/mdx-plugins/index.js'
// Rehype packages
import rehypeSlug from 'rehype-slug'
import rehypeAutolinkHeadings from 'rehype-autolink-headings'
import rehypeKatex from 'rehype-katex'
import rehypeCitation from 'rehype-citation'
import rehypePrismPlus from 'rehype-prism-plus'
import rehypePresetMinify from 'rehype-preset-minify'
import siteMetadata from './data/siteMetadata'

const root = process.cwd()
const isProduction = process.env.NODE_ENV === 'production'

const computedFields: ComputedFields = {
  readingTime: { type: 'json', resolve: (doc) => readingTime(doc.body.raw) },
  slug: {
    type: 'string',
    resolve: (doc) => doc._raw.sourceFileName.replace(/\.mdx?$/, ''),
  },
  path: {
    type: 'string',
    resolve: (doc) => `posts/${doc._raw.sourceFileName.replace(/\.mdx?$/, '')}`,
  },
  filePath: {
    type: 'string',
    resolve: (doc) => doc._raw.sourceFilePath,
  },
  postUrl: {
    type: 'string',
    resolve: (doc) => `/posts/${doc._raw.sourceFileName.replace(/\.mdx?$/, '')}`,
  },
  toc: { type: 'string', resolve: (doc) => extractTocHeadings(doc.body.raw) },
}

export const Posts = defineDocumentType(() => ({
  name: 'Posts',
  filePathPattern: '_posts/**/*.mdx',
  contentType: 'mdx',
  fields: {
    title: { type: 'string', required: true },
    date: { type: 'date', required: true },
    tags: { type: 'list', of: { type: 'string' }, default: [] },
    lastmod: { type: 'date' },
    draft: { type: 'boolean' },
    isDraft: { type: 'boolean' },
    excerpt: { type: 'string' },
    videoId: { type: 'string' },
    series: { type: 'string' },
    part: { type: 'number' },
    images: { type: 'json' },
    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.excerpt,
        image: doc.images ? doc.images[0] : siteMetadata.socialBanner,
        url: `${siteMetadata.siteUrl}/${doc._raw.flattenedPath}`,
        fileName: doc._raw.sourceFileName.replace(/\.mdx?$/, ''),
      }),
    },
  },
}))

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' },
  },
  computedFields,
}))

export default makeSource({
  contentDirPath: 'data',
  documentTypes: [Authors, Posts],
  mdx: {
    cwd: process.cwd(),
    remarkPlugins: [
      remarkExtractFrontmatter as any,
      remarkGfm,
      remarkCodeTitles,
      remarkMath,
      remarkImgToJsx,
    ],
    rehypePlugins: [
      rehypeSlug,
      rehypeAutolinkHeadings,
      rehypeKatex as any,
      [rehypeCitation, { path: path.join(root, 'data') }],
      [rehypePrismPlus, { defaultLanguage: 'js', ignoreMissing: true }],
      rehypePresetMinify,
    ],
  },
})