DefectingCat.github.io/lib/allPosts.ts

import fs from 'fs';
import path from 'path';
import matter from 'gray-matter';
import { remark } from 'remark';
import strip from 'strip-markdown';

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

export interface MyMatters {
  title: string;
  date: string;
  tags: string;
  categories: string;
  url: string;
  index_img: string;
}

export interface AllPostsData extends MyMatters {
  id: string;
  desc: string;
}

/**
 * Get all sorted posts
 * @returns
 */
function getSortedPostsData() {
  // Get file names under /posts
  const fileNames = fs.readdirSync(postsDirectory);
  const allPostsData = fileNames.map((fileName) => {
    // Remove ".md" from file name to get id
    const id = fileName.replace(/\.md$/, '');

    // Read markdown file as string
    const fullPath = path.join(postsDirectory, fileName);
    const fileContents = fs.readFileSync(fullPath, 'utf8');

    // Use gray-matter to parse the post metadata section
    const matterResult = matter(fileContents);

    // Process markdown to plain text
    const contentText = remark().use(strip).processSync(matterResult.content);

    // Combine the data with the id
    return {
      id,
      // Add post description
      content: matterResult.content,
      desc: `${contentText.toString().slice(0, 100)}...`,
      ...({
        ...matterResult.data,
        date: matterResult.data.date.toISOString(),
      } as MyMatters),
    };
  });

  // Sort posts by date
  return allPostsData.sort(({ date: a }, { date: b }) => {
    if (a < b) {
      return 1;
    } else if (a > b) {
      return -1;
    } else {
      return 0;
    }
  });
}

const allPostsData = getSortedPostsData();

export default allPostsData;