Added Category shortcodes

- added a shortcode that creates the categories (used for navigation & category-focused page-creation)
- added a shortcode that creates collections based on categories listed in articles

.eleventy.js

@@ -20,6 +20,8 @@ module.exports = function(eleventyConfig) {
   eleventyConfig.addCollection("blog", (collectionApi) => {
     return collectionApi.getFilteredByGlob('./src/blog/*.md').reverse()
   })
+  eleventyConfig.addCollection('categoryList', require('./src/_11ty/getCategoryList'))
+  eleventyConfig.addCollection('categories', require('./src/_11ty/createCategories'))
 
   return {
     dir: {

src/_11ty/createCategories.js

@@ -0,0 +1,33 @@
+const slugify = require('slugify')
+
+module.exports = (collectionApi) => {
+  const categories = {}
+
+  collectionApi.getFilteredByGlob('./src/blog/*.md').forEach(item => {
+    let category = item.data.category
+      
+    // Ignore the ones without a category
+    if (typeof category !== 'string')
+    return
+
+    const slug = strToSlug(category)
+
+    if (Array.isArray(categories[slug])) {
+      categories[slug].push(item)
+    } else {
+      categories[slug] = [item]
+    }
+  })
+
+  return categories  
+}
+
+function strToSlug(str) {
+  const options = {
+    replacement: '-',
+    remove: /[&,+()$~%.'':*?<>{}]/g,
+    lower: true,
+  }
+  
+  return slugify(str, options);
+}

src/_11ty/getCategoryList.js

@@ -0,0 +1,43 @@
+const slugify = require('slugify')
+
+module.exports = (collectionApi) => {
+  const catPages = []
+  let categories = []
+  const blogPosts = collectionApi.getFilteredByGlob('./src/blog/*.md')
+
+  blogPosts.map((item) => {        
+    let category = item.data.category
+    categories.push(category)
+  })
+
+  categories = categories.sort(sortAlphabetically)
+  let temp = [...new Set(categories)]
+
+  temp.forEach((category) => {
+    let slug = strToSlug(category);
+
+    if(slug !== 'in-the-spotlight') {
+      catPages.push({
+        'key': slug,
+        'name': category 
+      })
+    }
+  })
+
+  return catPages  
+}
+
+function strToSlug(str) {
+  const options = {
+    replacement: '-',
+    remove: /[&,+()$~%.'':*?<>{}]/g,
+    lower: true,
+  }
+    
+  return slugify(str, options)
+}
+
+
+function sortAlphabetically(a, b) {
+  return a.localeCompare(b, 'en', { sensitivity: 'base' });
+}