.eleventy.js

const { DateTime } = require('luxon')
const pluginRss = require('@11ty/eleventy-plugin-rss')
const pluginSyntaxHighlight = require('@11ty/eleventy-plugin-syntaxhighlight')
const pluginTOC = require('eleventy-plugin-nesting-toc')
const eleventyNavigationPlugin = require('@11ty/eleventy-navigation')

module.exports = function(eleventyConfig) {
  eleventyConfig.addPlugin(pluginRss)
  eleventyConfig.addPlugin(pluginSyntaxHighlight)

  eleventyConfig.addFilter('simpleDate', dateObj => {
    return DateTime.fromJSDate(dateObj, { zone: 'utc' }).toFormat('LLL dd, yyyy')
  })

  eleventyConfig.addPlugin(pluginTOC, {
    tags: ['h2','h3'],
    wrapper: 'div',
    wrapperClass: ''
  })

  eleventyConfig.addPlugin(eleventyNavigationPlugin)

  // Get the first `n` elements of a collection.
  eleventyConfig.addFilter('head', (array, n) => {
    if (n < 0) {
      return array.slice(n)
    }
    return array.slice(0, n)
  })

  // https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#valid-date-string
  eleventyConfig.addFilter('htmlDateString', dateObj => {
    return DateTime.fromJSDate(dateObj).toFormat('yyyy-LL-dd')
  })

  // only content in the `posts` directory
  eleventyConfig.addCollection('posts', function(collection) {
    return collection.getFilteredByGlob('./_site/posts/*.md').reverse()
  })

  // only content in the `courses` directory
  eleventyConfig.addCollection('courses', function(collection) {
    return collection.getFilteredByGlob('./_site/courses/*.md').reverse()
  })

  // only content in the `projects` directory
  eleventyConfig.addCollection('projects', function(collection) {
    return collection.getFilteredByGlob('./_site/projects/**/*.md')
  })

  // only content in the `rayveal` directory
  eleventyConfig.addCollection('rayveal', function(collection) {
    return collection.getFilteredByGlob('./_site/projects/rayveal/*.md')
  })

  // only content in the `seven` directory
  eleventyConfig.addCollection('seven', function(collection) {
    return collection.getFilteredByGlob('./_site/projects/seven/*.md')
  })

  eleventyConfig.addCollection('searchable', function(collection) {
    return collection
      .getFilteredByGlob(['./_site/courses/*.md', './_site/posts/*.md', './_site/projects/**/*.md'])
      .reverse()
  })

  eleventyConfig.addCollection('tagList', require('./_site/_templates/getTagList'))

  eleventyConfig.addPassthroughCopy('./_site/images')

  /* Markdown Plugins */
  let markdownIt = require('markdown-it')
  let markdownItAnchor = require('markdown-it-anchor')
  let options = {
    html: true,
    breaks: true,
    linkify: true
  }
  let opts = {
    permalink: true,
    permalinkClass: 'direct-link',
    permalinkSymbol: ' '
  }

  eleventyConfig.setLibrary('md', markdownIt(options).use(markdownItAnchor, opts))

  return {
    templateFormats: ['md', 'njk', 'html', 'liquid'],
    pathPrefix: '/',
    markdownTemplateEngine: 'liquid',
    htmlTemplateEngine: 'njk',
    dataTemplateEngine: 'njk',
    setQuietMode: true,
    passthroughFileCopy: true,
    dir: {
      input: '_site',
      includes: '_templates',
      data: '_data',
      output: 'dist'
    }
  }
}