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 uslug = require("uslug");
   6 const anchor = require("markdown-it-anchor");
   7 const md = require("markdown-it")({
   8     html: true,
   9     typographer: true,
  10 }).use(anchor, {
  11     slugify: s => uslug(s),
  12     permalink: true,
  13     permalinkBefore: true,
  14     permalinkClass: "header-anchor c-sun dec-none",
  15 });
  16 const CleanCSS = require("clean-css");
  17 const htmlMinifier = require("html-minifier");
  18 const util = require("util");
  19
  20 module.exports = (eleventyConfig) => {
  21     eleventyConfig.addNunjucksFilter('date', dateFilter);
  22     eleventyConfig.addPlugin(pluginRss);
  23     eleventyConfig.addPlugin(pluginSyntaxHighlight);
  24
  25     eleventyConfig.setLibrary("md", md);
  26
  27     eleventyConfig.addTransform("html-minifier", htmlMinifierTransform);
  28
  29     eleventyConfig.addPassthroughCopy("img");
  30     eleventyConfig.addPassthroughCopy("static");
  31     eleventyConfig.addPassthroughCopy("stamps");
  32     eleventyConfig.addPassthroughCopy({ "favicon": "/" });
  33
  34     eleventyConfig.addNunjucksShortcode("youtube", youtubeShortcode);
  35     eleventyConfig.addPairedNunjucksShortcode("tweet", tweetShortcode);
  36     eleventyConfig.addPairedShortcode("aside", asideShortcode);
  37     eleventyConfig.addPairedShortcode("figure", figureShortcode);
  38
  39     eleventyConfig.addFilter("markdown", value => md.renderInline(value));
  40     eleventyConfig.addFilter("groupby", groupbyFilter);
  41     eleventyConfig.addFilter("cssmin", css =>
  42         new CleanCSS({}).minify(css).styles);
  43     eleventyConfig.addFilter("debug", util.inspect);
  44
  45     eleventyConfig.setDataDeepMerge(true);
  46
  47     eleventyConfig.addCollection("years", collection => {
  48         const posts = collection.getFilteredByTag("posts");
  49         const items = groupby(posts, item => item.date.getFullYear());
  50         return items.reduce((obj, [k, v]) => (obj[k] = v, obj), {});
  51     });
  52
  53     return {
  54         markdownTemplateEngine: "njk",
  55     };
  56 };
  57
  58 function access(item, path) {
  59     const segments = path.split(".");
  60     for (const seg of segments) {
  61         if (item === undefined) { return null; }
  62         if (seg.endsWith("()")) {
  63             const method = item[seg.slice(0, -2)];
  64             if (method === undefined) { return null; }
  65             item = method.bind(item)();
  66         } else {
  67             item = item[seg];
  68         }
  69     }
  70     return item;
  71 }
  72
  73 function groupby(items, keyFn) {
  74     const results = [];
  75     for (const item of items) {
  76         const key = keyFn(item);
  77         if (results.length == 0 || key != results[results.length-1][0]) {
  78             results.push([key, [item]]);
  79         } else {
  80             results[results.length-1][1].push(item);
  81         }
  82     }
  83     return results;
  84 }
  85
  86 function groupbyFilter(items, path) {
  87     return groupby(items, item => access(item, path));
  88 }
  89
  90 function youtubeShortcode(items, inWidth = 560, inHeight = 315) {
  91     const width = items.width || inWidth;
  92     const height = items.height || inHeight;
  93     const allow = items.allow || "accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture"
  94     const border = items.border || "0";
  95     const video = items.video || items;
  96     if (!video) {
  97         throw "Required argument 'video'.";
  98     }
  99     const src = "https://www.youtube.com/embed/" + video;
 100     return `<div class="youtube row hcenter">
 101  <iframe width="${width}" height="${height}" src="${src}"
 102   frameborder="${border}" allow="${allow}" allowfullscreen></iframe>
 103 </div>`;
 104 }
 105
 106 function tweetShortcode(content, items) {
 107     // @TODO: Handle parsing date
 108     return `<div class="row hcenter">
 109  <blockquote class="twitter-tweet">
 110   <p lang="en" dir="ltr">${content}</p> &mdash; ${items.name} (@${items.at})
 111   <a href="${items.link}">${items.date}</a>
 112  </blockquote>
 113  <script async src="https://platform.twitter.com/widgets.js" charset="utf-8">
 114  </script>
 115 </div>`;
 116 }
 117
 118 function asideShortcode(content, style='') {
 119     const html = md.render(content);
 120     if (style) {
 121         return `<aside class="${style}">${html}</aside>`;
 122     } else {
 123         return `<aside>${html}</aside>`;
 124     }
 125 }
 126
 127 function figureShortcode(content, { src, alt }) {
 128     const captionHtml = md.render(content);
 129     return `<figure class="col hcenter">
 130   <img src="${src}" alt="${alt}">
 131   <figcaption>${captionHtml}</figcaption>
 132 </figure>`;
 133 }
 134
 135 function htmlMinifierTransform(content, outputPath) {
 136     if (outputPath.endsWith(".html")) {
 137         return htmlMinifier.minify(content, {
 138             useShortDoctype: true,
 139             removeComments: true,
 140             collapseWhitespace: true,
 141         });
 142     }
 143     return content;
 144 }