Organize a folder of markdown files into folders by year

organize_into_year_folders.js

const fs = require('fs-extra');
const path = require('path');
const matter = require('gray-matter');
const { Command } = require('commander');
const inquirer = require('inquirer');
const { parseISO, isValid, getYear } = require('date-fns');

// Define the root directory of your markdown files
let rootDir = 'ejfox';

// Set up the commander program
const program = new Command();

program
  .version('1.0.0')
  .description('Organize markdown files based on date metadata')
  .option('-d, --directory <dir>', 'Directory to organize')
  .option('-h, --help', 'Display help')
  .parse(process.argv);

const options = program.opts();

async function organizeMarkdownFiles() {
  try {
    const files = await fs.readdir(rootDir);

    for (const file of files) {
      if (path.extname(file) === '.md') {
        const filePath = path.join(rootDir, file);
        const fileContent = await fs.readFile(filePath, 'utf8');
        const { data } = matter(fileContent);
        const date = data.date || data.modified;

        if (!date) {
          console.log(`🚫 No date found in ${file}, skipping.`);
          continue;
        }

        let year;

        if (typeof date === 'string') {
          // Try to parse the date string using date-fns
          const parsedDate = parseISO(date);
          if (isValid(parsedDate)) {
            year = getYear(parsedDate);
          } else {
            console.log(`❌ Invalid date format in ${file}: ${date}`);
            continue;
          }
        } else if (date instanceof Date) {
          // If date is a Date object, get the year from it
          year = getYear(date);
        } else {
          console.log(`❌ Invalid date format in ${file}: ${date}`);
          continue;
        }

        const targetDir = path.join(rootDir, year.toString());

        // Create the target directory if it does not exist
        if (!fs.existsSync(targetDir)) {
          await fs.mkdir(targetDir);
        }

        // Move the file to the appropriate directory
        await fs.move(filePath, path.join(targetDir, file));
        console.log(`📁 Moved ${file} to ${targetDir}/`);
      }
    }
  } catch (err) {
    console.error(`❌ Error: ${err.message}`);
  }
}

async function main() {
  if (options.help) {
    program.help();
    return;
  }

  if (options.directory) {
    rootDir = options.directory;
  } else {
    const answers = await inquirer.prompt([
      {
        type: 'input',
        name: 'directory',
        message: 'Enter the directory to organize:',
        default: 'ejfox'
      }
    ]);
    rootDir = answers.directory;
  }

  console.log(`🚀 Organizing files in directory: ${rootDir}`);
  await organizeMarkdownFiles();
}

main();