Witch of Git - web/blog/blob - .eleventy.js

   1 const pluginRss = require("@11ty/eleventy-plugin-rss");
   2 const pluginSyntaxHighlight = require("@11ty/eleventy-plugin-syntaxhighlight");
   3 const Nunjucks = require("nunjucks");
   4 const dateFilter = require("nunjucks-date-filter");
   5 const md = require("markdown-it")();
   6 const CleanCSS = require("clean-css");
   7 const htmlMinifier = require("html-minifier");
   8
   9 module.exports = (eleventyConfig) => {
  10     eleventyConfig.addNunjucksFilter('date', dateFilter);
  11     eleventyConfig.addPlugin(pluginRss);
  12     eleventyConfig.addPlugin(pluginSyntaxHighlight);
  13
  14     eleventyConfig.addTransform("html-minifier", htmlMinifierTransform);
  15
  16     eleventyConfig.addPassthroughCopy("img");
  17     eleventyConfig.addPassthroughCopy("static");
  18
  19     eleventyConfig.addNunjucksShortcode("youtube", youtubeShortcode);
  20     eleventyConfig.addPairedNunjucksShortcode("tweet", tweetShortcode);
  21     eleventyConfig.addPairedShortcode("aside", asideShortcode);
  22     eleventyConfig.addPairedShortcode("figure", figureShortcode);
  23
  24     eleventyConfig.addFilter("markdown", value => md.renderInline(value));
  25     eleventyConfig.addFilter("groupby", groupbyFilter);
  26     eleventyConfig.addFilter("cssmin", css =>
  27         new CleanCSS({}).minify(css).styles);
  28
  29     eleventyConfig.setDataDeepMerge(true);
  30
  31     eleventyConfig.addCollection("years", collection => {
  32         const posts = collection.getFilteredByTag("posts");
  33         const items = groupby(posts, item => item.date.getFullYear());
  34         return items.reduce((obj, [k, v]) => (obj[k] = v, obj), {});
  35     });
  36
  37     return {
  38         markdownTemplateEngine: "njk",
  39     };
  40 };
  41
  42 function access(item, path) {
  43     const segments = path.split(".");
  44     for (const seg of segments) {
  45         if (item === undefined) { return null; }
  46         if (seg.endsWith("()")) {
  47             const method = item[seg.slice(0, -2)];
  48             if (method === undefined) { return null; }
  49             item = method.bind(item)();
  50         } else {
  51             item = item[seg];
  52         }
  53     }
  54     return item;
  55 }
  56
  57 function groupby(items, keyFn) {
  58     const results = [];
  59     for (const item of items) {
  60         const key = keyFn(item);
  61         if (results.length == 0 || key != results[results.length-1][0]) {
  62             results.push([key, [item]]);
  63         } else {
  64             results[results.length-1][1].push(item);
  65         }
  66     }
  67     return results;
  68 }
  69
  70 function groupbyFilter(items, path) {
  71     return groupby(items, item => access(item, path));
  72 }
  73
  74 function youtubeShortcode(items, inWidth = 560, inHeight = 315) {
  75     const width = items.width || inWidth;
  76     const height = items.height || inHeight;
  77     const allow = items.allow || "accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture"
  78     const border = items.border || "0";
  79     const video = items.video || items;
  80     if (!video) {
  81         throw "Required argument 'video'.";
  82     }
  83     const src = "https://www.youtube.com/embed/" + video;
  84     return `<div class="youtube row hcenter">
  85  <iframe width="${width}" height="${height}" src="${src}"
  86   frameborder="${border}" allow="${allow}" allowfullscreen></iframe>
  87 </div>`;
  88 }
  89
  90 function tweetShortcode(content, items) {
  91     // @TODO: Handle parsing date
  92     return `<div class="row hcenter">
  93  <blockquote class="twitter-tweet">
  94   <p lang="en" dir="ltr">${content}</p> &mdash; ${items.name} (@${items.at})
  95   <a href="${items.link}">${items.date}</a>
  96  </blockquote>
  97  <script async src="https://platform.twitter.com/widgets.js" charset="utf-8">
  98  </script>
  99 </div>`;
 100 }
 101
 102 function asideShortcode(content, style='') {
 103     const html = md.render(content);
 104     if (style) {
 105         return `<aside class="${style}">${html}</aside>`;
 106     } else {
 107         return `<aside>${html}</aside>`;
 108     }
 109 }
 110
 111 function figureShortcode(content, { src, alt }) {
 112     const captionHtml = md.render(content);
 113     return `<figure class="col hcenter">
 114   <img src="${src}" alt="${alt}">
 115   <figcaption>${captionHtml}</figcaption>
 116 </figure>`;
 117 }
 118
 119 function htmlMinifierTransform(content, outputPath) {
 120     if (outputPath.endsWith(".html")) {
 121         return htmlMinifier.minify(content, {
 122             useShortDoctype: true,
 123             removeComments: true,
 124             collapseWhitespace: true,
 125         });
 126     }
 127     return content;
 128 }