initial

src/lib/markdown.ts

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+import fs from 'fs';
+import path from 'path';
+import matter from 'gray-matter';
+import { remark } from 'remark';
+import html from 'remark-html';
+
+export interface Post {
+  slug: string;
+  title: string;
+  date: string;
+  tags: string[];
+  summary: string;
+  content: string;
+}
+
+const postsDirectory = path.join(process.cwd(), 'posts');
+
+export async function getPostBySlug(slug: string): Promise<Post> {
+  const realSlug = slug.replace(/\.md$/, '');
+  const fullPath = path.join(postsDirectory, `${realSlug}.md`);
+  const fileContents = fs.readFileSync(fullPath, 'utf8');
+  const { data, content } = matter(fileContents);
+
+  const processedContent = await remark()
+    .use(html)
+    .process(content);
+
+  return {
+    slug: realSlug,
+    title: data.title,
+    date: data.date,
+    tags: data.tags || [],
+    summary: data.summary,
+    content: processedContent.toString(),
+  };
+}
+
+export async function getAllPosts(): Promise<Post[]> {
+  const fileNames = fs.readdirSync(postsDirectory);
+  const allPostsData = await Promise.all(
+    fileNames
+      .filter((fileName) => fileName.endsWith('.md'))
+      .map(async (fileName) => {
+        const slug = fileName.replace(/\.md$/, '');
+        return getPostBySlug(slug);
+      })
+  );
+
+  return allPostsData.sort((a, b) => (a.date < b.date ? 1 : -1));
+}
+
+export async function getPostsByTag(tag: string): Promise<Post[]> {
+  const allPosts = await getAllPosts();
+  return allPosts.filter((post) => post.tags.includes(tag));
+}