fix slugs

content/posts/posts.11tydata.js

@@ -3,4 +3,28 @@ module.exports = {
 		"posts"
 	],
 	"layout": "layouts/post.njk",
+	eleventyComputed: {
+		// data here is the post's data
+		permalink: function (data) {
+			if (data.permalink) {
+				// First, if I have already specified a permalink, just use it
+				return data.permalink;
+			}
+
+			function urlDatePrefix(postDate) {
+				const date = new Date(postDate);
+				return `${[date.getFullYear(), date.getMonth() + 1, date.getDate()].map(v => String(v).padStart(2, '0')).join('/')}`;
+			}
+			// If there is no permalink, look for a slug in the data.
+			// If there is no slug, just use the slugify filter on the title
+			const slug = data.slug ?? this.slugify(data.title);
+
+			if (slug.includes('/')) {
+				return `${slug}/index.html`;
+			}
+
+			// Combine it all for your new, consistent permalink
+			return `/${urlDatePrefix(data.date)}/${slug}/index.html`;
+		}
+	}
 };