.eleventy.js

const { DateTime } = require("luxon");
const esbuild = require("esbuild");
const fs = require("fs");
const path = require("path");
const pluginRss = require("@11ty/eleventy-plugin-rss");
const pluginNavigation = require("@11ty/eleventy-navigation");
const markdownIt = require("markdown-it");
const markdownItAnchor = require("markdown-it-anchor");
const yaml = require("js-yaml");
const { sassPlugin } = require("esbuild-sass-plugin");
const svgSprite = require("eleventy-plugin-svg-sprite");
const { imageShortcode, imageWithClassShortcode } = require("./config");

require("dotenv").config();

module.exports = function (config) {
  config.setFreezeReservedData(false);
  // Set pathPrefix for site
  let pathPrefix = "/";

  // for #80 (update site favicon)
  // copy files from `_img/favicon/` to `_site/`
  config.addPassthroughCopy({ "_img/favicon/": "/assets/" });

  // Copy USWDS init JS so we can load it in HEAD to prevent banner flashing
  config.addPassthroughCopy({
    "./node_modules/@uswds/uswds/dist/js/uswds-init.js":
      "assets/js/uswds-init.js",
  });

  // Add plugins
  config.addPlugin(pluginRss);
  config.addPlugin(pluginNavigation);

  //// SVG Sprite Plugin for USWDS USWDS icons
  config.addPlugin(svgSprite, {
    path: "./node_modules/@uswds/uswds/dist/img/uswds-icons",
    svgSpriteShortcode: "uswds_icons_sprite",
    svgShortcode: "uswds_icons",
  });

  //// SVG Sprite Plugin for USWDS USA icons
  config.addPlugin(svgSprite, {
    path: "./node_modules/@uswds/uswds/dist/img/usa-icons",
    svgSpriteShortcode: "usa_icons_sprite",
    svgShortcode: "usa_icons",
  });

  // Allow yaml to be used in the _data dir
  config.addDataExtension("yaml, yml", (contents) => yaml.load(contents));

  // This is an example of creating an Eleventy collection from
  // a data file, in this case it's _data/services.yml
  config.addCollection("services", (collection) => {
    const allServices = collection.getAll()[0].data.services;
    return allServices;
  });

  // This gives us a filter, based on BASEURL which we get from
  // either the environment (thanks to Cloud.gov Pages) or a
  // .env file, which we can use to convert relative URLs to
  // absolute URLs

  const { hosts } = yaml.load(fs.readFileSync("./_data/site.yaml", "utf8"));

  function isValidGitBranch(branch) {
    const validGitBranch = /^[a-zA-Z0-9_\-\.\/]+$/;
    return validGitBranch.test(branch);
  }

  function isValidTwitterHandle(handle) {
    const validTwitterHandle = /^\w{1,15}$/;
    return validTwitterHandle.test(handle);
  }

  function isValidDapAgency(agency) {
    const validDapAgency = /^\w{1,15}$/;
    return validDapAgency.test(agency);
  }

  function isValidAnalyticsId(ga) {
    const validAnalyticsId = /^(G|UA|YT|MO)-[a-zA-Z0-9-]+$/;
    return validAnalyticsId.test(ga);
  }

  function isValidSearchKey(accessKey) {
    const validSearchKey = /^[0-9a-zA-Z]{1,}=*$/;
    return validSearchKey.test(accessKey);
  }

  function isValidSearchAffiliate(affiliate) {
    const validSearchAffiliate = /^[0-9a-z-]{1,}$/;
    return validSearchAffiliate.test(affiliate);
  }

  if (process.env.BRANCH && isValidGitBranch(process.env.BRANCH)) {
    switch (process.env.BRANCH) {
      case "main":
        baseUrl = new URL(hosts.live).href.replace(/\/$/, "");
        break;
      default:
        baseUrl = new URL(hosts.preview).href.replace(/\/$/, "");
        break;
    }
  } else {
    baseUrl = new URL(hosts.undefined).href.replace(/\/$/, "");
  }

  config.addGlobalData("baseUrl", baseUrl);
  config.addGlobalData("site.baseUrl", baseUrl);

  if (process.env.TWITTER && isValidTwitterHandle(process.env.TWITTER)) {
    config.addGlobalData("site.twitter", process.env.TWITTER);
  }

  if (process.env.DAP_AGENCY && isValidDapAgency(process.env.DAP_AGENCY)) {
    config.addGlobalData("site.dap.agency", process.env.DAP_AGENCY);
  }

  if (
    process.env.DAP_SUBAGENCY &&
    isValidDapAgency(process.env.DAP_SUBAGENCY)
  ) {
    config.addGlobalData("site.dap.subagency", process.env.DAP_SUBAGENCY);
  }

  if (process.env.GA && isValidAnalyticsId(process.env.GA)) {
    config.addGlobalData("site.ga", process.env.GA);
  }

  if (
    process.env.SEARCH_ACCESS_KEY &&
    isValidSearchKey(process.env.SEARCH_ACCESS_KEY)
  ) {
    config.addGlobalData("site.access_key", process.env.SEARCH_ACCESS_KEY);
  }

  if (
    process.env.SEARCH_AFFILIATE &&
    isValidSearchAffiliate(process.env.SEARCH_AFFILIATE)
  ) {
    config.addGlobalData("site.affiliate", process.env.SEARCH_AFFILIATE);
  }

  // Template function used to sort a collection by a certain property
  // Ex: {% assign sortedJobs = collection.jobs | sortByProp: "title" %}
  function sortByProp(values, prop) {
    let vals = [...values];
    return vals.sort((a, b) => {
      if (typeof a[prop] == "string" && typeof b[prop] == "string") {
        return a[prop].localeCompare(b[prop]);
      } else {
        return Math.sign(a[prop] - b[prop]);
      }
    });
  }

  // Get Date and Time as Seconds
  // Datetime format: YYYY-MM-DD HH:MM
  config.addLiquidShortcode("getDateTimeinSeconds", getDateTimeinSeconds);
  function getDateTimeinSeconds(datetime) {
    // Split the datetime string into date and time parts
    const dateParts = datetime.split(" ");
    const date = dateParts[0];
    const time = dateParts[1];

    // Extract hours, minutes, and AM/PM
    let hours = parseInt(time.slice(0, time.length - 2).split(":")[0], 10); // Adjusted to capture full hour
    const minutes = time.length === 6 ? time.slice(2, 4) : time.slice(3, 5);
    const amPm = time.slice(-2).toLowerCase(); // Handle AM/PM case

    // Convert hours to 24-hour format
    if (amPm === "pm" && hours !== 12) {
      hours += 12;
    } else if (amPm === "am" && hours === 12) {
      hours = 0;
    }

    // Format the datetime string for timestamp conversion
    const formattedDatetime = `${date} ${String(hours).padStart(2, "0")}:${minutes} ET`;

    // Convert to timestamp (in seconds)
    const timestamp = Math.floor(new Date(formattedDatetime).getTime() / 1000);

    return timestamp;
  }

  // Get State From Dates
  config.addLiquidShortcode("getStateFromDates", getStateFromDates);
  function getStateFromDates(opens, closes) {
    if (!opens && !closes) {
      return "unknown";
    }

    // Get the current date in "America/New_York" timezone
    let now_date = new Date(
      new Date().toLocaleString("en-US", { timeZone: "America/New_York" }),
    );

    // Parse the 'opens' date in UTC and convert to local time
    let opens_date = opens ? new Date(opens) : null;

    // Parse the 'closes' date in UTC and set time to 11:59:59 PM in local time
    let closes_date = null;
    if (closes) {
      closes_date = new Date(closes);
      // Set the time to 11:59:59 PM in local time
      closes_date.setHours(23, 59, 59, 999);
    }

    // Convert opens_date and closes_date to local time for comparison
    if (opens_date) {
      // Adjust opens_date to local timezone
      opens_date = new Date(
        opens_date.toLocaleString("en-US", { timeZone: "America/New_York" }),
      );

      // Adjust closes_date to local timezone
      if (closes_date) {
        closes_date = new Date(
          closes_date.toLocaleString("en-US", { timeZone: "America/New_York" }),
        );
      }

      // Check if it's open or closed
      let isOpen = now_date >= opens_date;
      let isClosed = closes_date && now_date > closes_date;

      if (isOpen && !isClosed) {
        return "open";
      } else if (isClosed) {
        return "closed";
      } else {
        return "upcoming";
      }
    }

    return "unknown"; // Default fallback if no conditions are met
  }

  config.addFilter("stateFromDates", getStateFromDates);
  config.addFilter("sortByProp", sortByProp);

  config.addFilter("readableDate", (dateObj) => {
    return DateTime.fromJSDate(dateObj, { zone: "America/New_York" }).toFormat(
      "dd LLL yyyy",
    );
  });

  // https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#valid-date-string
  config.addFilter("htmlDateString", (dateObj) => {
    if (dateObj !== undefined && dateObj !== null) {
      let dateTime = DateTime.fromJSDate(dateObj);

      // If working locally, add one day to the date to match what is in the actual environments.
      if (baseUrl.includes("localhost")) {
        dateTime = dateTime.plus({ days: 1 });
        return dateTime.toFormat("yyyy-LL-dd");
      } else {
        return dateTime.toFormat("yyyy-LL-dd");
      }
    }
  });

  // Get the first `n` elements of a collection.
  config.addFilter("head", (array, n) => {
    if (!Array.isArray(array) || array.length === 0) {
      return [];
    }
    if (n < 0) {
      return array.slice(n);
    }

    return array.slice(0, n);
  });

  // Return the smallest number argument
  config.addFilter("min", (...numbers) => {
    return Math.min.apply(null, numbers);
  });

  function filterTagList(tags) {
    return (tags || []).filter(
      (tag) => ["all", "nav", "post", "posts"].indexOf(tag) === -1,
    );
  }

  config.addFilter("filterTagList", filterTagList);

  // Create an array of all tags
  config.addCollection("tagList", function (collection) {
    let tagSet = new Set();
    collection.getAll().forEach((item) => {
      (item.data.tags || []).forEach((tag) => tagSet.add(tag));
    });

    return filterTagList([...tagSet]);
  });

  // Customize Markdown library and settings:
  let markdownLibrary = markdownIt({
    html: true,
    breaks: false,
    linkify: true,
  }).use(markdownItAnchor, {
    permalink: markdownItAnchor.permalink.ariaHidden({
      placement: "after",
      class: "direct-link",
      symbol: "",
      level: [1, 2, 3, 4],
    }),
    slugify: config.getFilter("slug"),
  });
  config.setLibrary("md", markdownLibrary);

  // Create a Markdown parser instance
  const markdownLib = markdownIt({ html: true });

  // Add the markdown filter
  config.addFilter("markdown", (content) => {
    return markdownLib.render(content);
  });

  // Override Browsersync defaults (used only with --serve)
  config.setBrowserSyncConfig({
    callbacks: {
      ready: function (err, browserSync) {
        const content_404 = fs.readFileSync("_site/404/index.html");

        browserSync.addMiddleware("*", (req, res) => {
          // Provides the 404 content without redirect.
          res.writeHead(404, { "Content-Type": "text/html; charset=UTF-8" });
          res.write(content_404);
          const svgSprite = require("eleventy-plugin-svg-sprite");
          res.end();
        });
      },
    },
    ui: false,
    ghostMode: false,
  });

  // Set image shortcodes
  config.addLiquidShortcode("image", imageShortcode);
  config.addLiquidShortcode("image_with_class", imageWithClassShortcode);
  config.addLiquidShortcode("uswds_icon", function (name) {
    return `
    <svg class="usa-icon" aria-hidden="true" role="img">
      <use xlink:href="#svg-${name}"></use>
    </svg>`;
  });

  // size 3 through 9
  config.addLiquidShortcode("uswds_icon_with_size", function (name, size) {
    return `
    <svg class="usa-icon usa-icon--size-${size}" aria-hidden="true" role="img">
      <use xlink:href="#svg-${name}"></use>
    </svg>`;
  });

  // If BASEURL env variable exists, update pathPrefix to the BASEURL
  if (process.env.BASEURL) {
    pathPrefix = process.env.BASEURL;
  }

  return {
    dataTemplateEngine: "liquid",

    // Control which files Eleventy will process
    // e.g.: *.md, *.njk, *.html, *.liquid
    templateFormats: ["md", "njk", "html", "liquid"],

    // Pre-process *.md files with: (default: `liquid`)
    // Other template engines are available
    // See https://www.11ty.dev/docs/languages/ for other engines.
    markdownTemplateEngine: "liquid",

    // Pre-process *.html files with: (default: `liquid`)
    // Other template engines are available
    // See https://www.11ty.dev/docs/languages/ for other engines.
    htmlTemplateEngine: "liquid",

    // -----------------------------------------------------------------
    // If your site deploys to a subdirectory, change `pathPrefix`.
    // Don’t worry about leading and trailing slashes, we normalize these.

    // If you don’t have a subdirectory, use "" or "/" (they do the same thing)
    // This is only used for link URLs (it does not affect your file structure)
    // Best paired with the `url` filter: https://www.11ty.dev/docs/filters/url/

    // You can also pass this in on the command line using `--pathprefix`

    // Optional (default is shown)
    pathPrefix: pathPrefix,
    // -----------------------------------------------------------------

    // These are all optional (defaults are shown):
    dir: {
      input: ".",
      includes: "_includes",
      data: "_data",
      output: "_site",
    },
  };
};