blog/lib/posts.ts

import fs from 'fs';
import path from 'path';
import matter from 'gray-matter';
import readingTime from 'reading-time';

const postsDirectory = path.join(process.cwd(), 'posts');

export interface PostData {
  id: string;
  date: string;
  title: string;
  description: string;
  content: string;
  readingTime: string;
}

export interface PostMeta {
  id: string;
  date: string;
  title: string;
  description: string;
  readingTime: string;
}

export function getSortedPostsData(): PostMeta[] {
  try {
    const fileNames = fs.readdirSync(postsDirectory);
    const allPostsData = fileNames
      .filter(fileName => fileName.endsWith('.mdx'))
      .map(fileName => {
        const id = fileName.replace(/\.mdx$/, '');
        const fullPath = path.join(postsDirectory, fileName);
        const fileContents = fs.readFileSync(fullPath, 'utf8');
        const matterResult = matter(fileContents);
        const stats = readingTime(matterResult.content);

        return {
          id,
          date: matterResult.data.date as string,
          title: matterResult.data.title as string,
          description: matterResult.data.description as string,
          readingTime: stats.text,
        };
      });

    return allPostsData.sort((a, b) => (a.date < b.date ? 1 : -1));
  } catch (error) {
    console.log("No 'posts' directory found, returning empty array.");
    return [];
  }
}

export function getAllPostIds() {
  try {
    const fileNames = fs.readdirSync(postsDirectory);
    return fileNames.map(fileName => ({
      params: {
        slug: fileName.replace(/\.mdx$/, ''),
      },
    }));
  } catch (error) {
    return [];
  }
}

export async function getPostData(id: string): Promise<PostData> {
  const fullPath = path.join(postsDirectory, `${id}.mdx`);
  const fileContents = fs.readFileSync(fullPath, 'utf8');
  const matterResult = matter(fileContents);
  const stats = readingTime(matterResult.content);

  return {
    id,
    content: matterResult.content,
    date: matterResult.data.date,
    title: matterResult.data.title,
    description: matterResult.data.description,
    readingTime: stats.text,
  };
}