.eleventy.js

import fs from "node:fs";

import eleventyLucideicons from "@grimlink/eleventy-plugin-lucide-icons";
import eleventySyntaxHighlight from "@11ty/eleventy-plugin-syntaxhighlight";
import markdownIt from "markdown-it";
import markdownItAnchor from "markdown-it-anchor";
import pluginTOC from "eleventy-plugin-toc";

import * as lucideIcons from "lucide-static";

import { registerLlmExports } from "./src/eleventy/llm-exports.js";
import { registerNavigationFilters } from "./src/eleventy/navigation.js";

const readSiteData = () => {
  try {
    const raw = fs.readFileSync(
      new URL("./_data/site.json", import.meta.url),
      "utf8",
    );
    return JSON.parse(raw) || null;
  } catch {
    return null;
  }
};

export default function eleventyConfigFile(eleventyConfig) {
  eleventyConfig.addPassthroughCopy("assets");
  eleventyConfig.addPassthroughCopy("media");

  // Plugins
  eleventyConfig.addPlugin(eleventyLucideicons);
  eleventyConfig.addPlugin(eleventySyntaxHighlight);
  eleventyConfig.addPlugin(pluginTOC);

  // Global data (for absolute URLs in meta tags + llm exports).
  const site = readSiteData();
  const siteTitle = site?.title || "Pages CMS";
  const isServe = process.argv.includes("--serve");
  const siteUrl = process.env.SITE_URL || (isServe ? "" : site?.url || "");
  eleventyConfig.addGlobalData("siteUrl", siteUrl);

  // Markdown
  const markdown = markdownIt({ html: true, breaks: true, linkify: true }).use(
    markdownItAnchor,
    {
      permalink: markdownItAnchor.permalink.headerLink(),
    },
  );

  const defaultTableOpen = markdown.renderer.rules.table_open;
  const defaultTableClose = markdown.renderer.rules.table_close;
  markdown.renderer.rules.table_open = (tokens, idx, mdOptions, env, self) => {
    return (
      '<div class="relative w-full overflow-auto my-6"><table>' +
      (defaultTableOpen
        ? defaultTableOpen(tokens, idx, mdOptions, env, self)
        : "")
    );
  };
  markdown.renderer.rules.table_close = (tokens, idx, mdOptions, env, self) => {
    return (
      (defaultTableClose
        ? defaultTableClose(tokens, idx, mdOptions, env, self)
        : "") + "</table></div>"
    );
  };
  eleventyConfig.setLibrary("md", markdown);
  eleventyConfig.addFilter("markdown", function markdownFilter(value) {
    return markdown.render(String(value || ""));
  });

  eleventyConfig.addFilter("markdownUrl", function markdownUrl(pageUrl) {
    if (pageUrl === "/") return "/index.md";
    if (pageUrl === "/docs/" || pageUrl === "/docs") return "/docs/index.md";
    return pageUrl.replace(/\/$/, "") + ".md";
  });

  registerNavigationFilters(eleventyConfig, lucideIcons);
  registerLlmExports(eleventyConfig, {
    getSiteUrl: () => siteUrl,
    getSiteTitle: () => siteTitle,
    getSiteDescription: () => site?.description || "",
  });

  return {
    dir: {
      input: ".",
      output: "_site",
      includes: "_includes",
      layouts: "_includes/layouts",
      data: "_data",
    },
    markdownTemplateEngine: "njk",
  };
}