.eleventy.js

const { DateTime } = require("luxon");
const CleanCSS = require("clean-css");
const UglifyJS = require("uglify-js");
const htmlmin = require("html-minifier");
const eleventyNavigationPlugin = require("@11ty/eleventy-navigation");

module.exports = function (eleventyConfig) {
  // Eleventy Navigation https://www.11ty.dev/docs/plugins/navigation/
  eleventyConfig.addPlugin(eleventyNavigationPlugin);

  // Configuration API: use eleventyConfig.addLayoutAlias(from, to) to add
  // layout aliases! Say you have a bunch of existing content using
  // layout: post. If you don’t want to rewrite all of those values, just map
  // post to a new file like this:
  // eleventyConfig.addLayoutAlias("post", "layouts/my_new_post_layout.njk");

  // Merge data instead of overriding
  // https://www.11ty.dev/docs/data-deep-merge/
  eleventyConfig.setDataDeepMerge(true);

  // Add support for maintenance-free post authors
  // Adds an authors collection using the author key in our post frontmatter
  // Thanks to @pdehaan: https://github.com/pdehaan
  eleventyConfig.addCollection("authors", (collection) => {
    const blogs = collection.getFilteredByGlob("posts/*.md");
    return blogs.reduce((coll, post) => {
      const author = post.data.author;
      if (!author) {
        return coll;
      }
      if (!coll.hasOwnProperty(author)) {
        coll[author] = [];
      }
      coll[author].push(post.data);
      return coll;
    }, {});
  });

  // Date formatting (human readable)
  eleventyConfig.addFilter("readableDate", (dateObj) => {
    return DateTime.fromJSDate(dateObj).toFormat("dd LLL yyyy");
  });

  // Date formatting (machine readable)
  eleventyConfig.addFilter("machineDate", (dateObj) => {
    return DateTime.fromJSDate(dateObj).toFormat("yyyy-MM-dd");
  });

  // Minify CSS
  eleventyConfig.addFilter("cssmin", function (code) {
    return new CleanCSS({}).minify(code).styles;
  });

  // Minify JS
  eleventyConfig.addFilter("jsmin", function (code) {
    let minified = UglifyJS.minify(code);
    if (minified.error) {
      console.log("UglifyJS error: ", minified.error);
      return code;
    }
    return minified.code;
  });

  // Minify HTML output
  eleventyConfig.addTransform("htmlmin", function (content, outputPath) {
    if (outputPath.indexOf(".html") > -1) {
      let minified = htmlmin.minify(content, {
        useShortDoctype: true,
        removeComments: true,
        collapseWhitespace: true,
      });
      return minified;
    }
    return content;
  });

  // Don't process folders with static assets e.g. images
  eleventyConfig.addPassthroughCopy("favicon.ico");
  eleventyConfig.addPassthroughCopy("static/img");
  eleventyConfig.addPassthroughCopy("admin/");
  // We additionally output a copy of our CSS for use in Decap CMS previews
  eleventyConfig.addPassthroughCopy("_includes/assets/css/inline.css");

  /* Image shortcode */
  eleventyConfig.addShortcode("image", function (src, alt, styleClass) {
    return `<img src="${src}" alt="${alt}" class="${styleClass}">`;
  });

  /* Markdown Plugins */
  let markdownIt = require("markdown-it");
  let markdownItAnchor = require("markdown-it-anchor");
  let options = {
    breaks: true,
    linkify: true,
  };
  let opts = {
    permalink: false,
  };

  eleventyConfig.setLibrary(
    "md",
    markdownIt(options).use(markdownItAnchor, opts),
  );
  // Add a shortcode for RoasWorld profile iframes
  eleventyConfig.addShortcode(
    "perfil",
    function (src, title, width = "640", height = "480") {
      return `<iframe src="${src}" title="${title}" frameborder="0" sandbox="allow-scripts allow-same-origin" allowfullscreen width="${width}" height="${height}"></iframe>`;
    },
  );
  return {
    templateFormats: ["md", "njk", "liquid"],

    // If your site lives in a different subdirectory, change this.
    // Leading or trailing slashes are all normalized away, so don’t worry about it.
    // If you don’t have a subdirectory, use "" or "/" (they do the same thing)
    // This is only used for URLs (it does not affect your file structure)
    pathPrefix: "/",

    markdownTemplateEngine: "liquid",
    htmlTemplateEngine: "njk",
    dataTemplateEngine: "njk",
    dir: {
      input: ".",
      includes: "_includes",
      data: "_data",
      output: "_site",
    },
  };
};