MDX Starter (#3)

Reviewed-on: mthomson/michaelthomson#3
Co-authored-by: Michael Thomson <michael@michaelthomson.dev>
Co-committed-by: Michael Thomson <michael@michaelthomson.dev>

lib/posts.ts

@@ -0,0 +1,40 @@
+import fs from "fs"
+import { join } from "path"
+import matter from 'gray-matter'
+
+const postsDirectory = join(process.cwd(), "posts");
+
+export function getPostSlugs() {
+  const fileNames = fs.readdirSync(postsDirectory);
+  return fileNames.map(filename => filename.replace(/\.mdx$/, ""))
+}
+
+export function getPostBySlug(slug: string, fields: string[] = []) {
+  const fullPath = join(postsDirectory, `${slug}.mdx`);
+  const fileContents = fs.readFileSync(fullPath, "utf8");
+  const { data, content } = matter(fileContents)
+
+  type Items = {
+    [key: string]: string;
+  }
+
+  const items: Items = {};
+
+  fields.forEach((field) => {
+    if (field === "slug") {
+      items[field] = slug;
+    } else if (field === "content") {
+      items[field] = content;
+    } else if (typeof data[field] !== undefined) {
+      items[field] = data[field];
+    }
+  });
+
+  return items;
+}
+
+export function getAllPosts(fields: string[] = []) {
+  const slugs = getPostSlugs();
+  const posts = slugs.map((slug) => getPostBySlug(slug, fields));
+  return posts;
+}