contentlayer.config.ts

import {
  ComputedFields,
  defineDocumentType,
  makeSource,
} from "contentlayer/source-files";
import readingTime from "reading-time";
import { rehypeAccessibleEmojis } from "rehype-accessible-emojis";
import rehypeAutolinkHeadings from "rehype-autolink-headings";
import rehypePrettyCode from "rehype-pretty-code";
import rehypeSlug from "rehype-slug";
import remarkGfm from "remark-gfm";

const computedFields: ComputedFields = {
  readingTime: {
    type: "json",
    resolve: (doc) => readingTime(doc.body.raw)
  },
  slug: {
    type: "string",
    resolve: (doc) =>
      doc._raw.flattenedPath.replace(/(\d{4})-(\d{2})-(\d{2})-/g, ""), // date-blogname.mdx
  },
  slugAsParams: {
    type: "string",
    resolve: (doc) =>
      doc._raw.flattenedPath
        .replace(/(\d{4})-(\d{2})-(\d{2})-/g, "")
        .split("/")
        .splice(1)
        .join(""),
  },
};

export const Blog = defineDocumentType(() => ({
  name: "Blog",
  filePathPattern: `blogs/**/*.mdx`,
  contentType: "mdx",
  fields: {
    title: {
      type: "string",
      required: true,
    },
    description: {
      type: "string",
      required: true,
    },
    date: {
      type: "date",
      required: true,
    },
    published: {
      type: "boolean",
      default: true,
    },
    cover_image: {
      type: "string",
      required: true,
    },
    og_image: {
      type: "string",
    },
    tags: {
      type: "list",
      of: { type: "string" },
      required: true,
    },
    authors: {
      type: "list",
      of: { type: "string" },
      required: true,
    },
  },
  computedFields,
}));

export const Snippet = defineDocumentType(() => ({
  name: "Snippet",
  filePathPattern: `snippets/**/*.mdx`,
  contentType: "mdx",
  fields: {
    title: {
      type: "string",
      required: true,
    },
    date: {
      type: "date",
      required: true,
    },
    description: {
      type: "string",
      required: true,
    },
    published: {
      type: "boolean",
      default: true,
    },
  },
  computedFields,
}));

const themePath = "./assets/themes/markdown-theme.json";

export default makeSource({
  contentDirPath: "./content",
  documentTypes: [Blog, Snippet],
  mdx: {
    remarkPlugins: [remarkGfm],
    rehypePlugins: [
      rehypeAccessibleEmojis,
      rehypeSlug,
      [
        rehypePrettyCode,
        {
          theme: "material-theme-darker",
          // theme: JSON.parse(readFileSync(themePath, "utf-8")),
          onVisitLine(node: any) {
            // Prevent lines from collapsing in `display: grid` mode, and allow empty
            // lines to be copy/pasted
            if (node.children.length === 0) {
              node.children = [{ type: "text", value: " " }];
            }
          },
          onVisitHighlightedLine(node: any) {
            node.properties.className.push("line--highlighted");
          },
          onVisitHighlightedWord(node: any) {
            node.properties.className = ["word--highlighted"];
          },
        },
      ],
      [
        rehypeAutolinkHeadings,
        {
          properties: {
            className: ["subheading-anchor"],
            ariaLabel: "Link to section",
          },
        },
      ],
    ],
  },
});