DragonBall Subbed File Rename Script

db.mjs

/* 
* Quick and dirty script to rename files downloaded from: https://archive.org/details/dragon-ball-remastered-bluray-complete-e-1-e-153-eng-dub
* I only downloaded the mkv files but this will rename them well enough for Sonarr to be able to properly organize.
*/

import fs from 'fs';

const matcher = /Dragonball\sS01[E|e](\d+)(.+)/i;

(async () => {
  const rootDir = `/Volumes/media/tvshows/Dragon Ball`;

  const filenames = (await fs.promises.readdir(rootDir)).filter((fn) => fn !== '.DS_Store');
  const results = filenames.map((fn) => {
    const group = fn.match(matcher);
    if (!group) {
      return;
    }
    const [,oldEpisodeNum, episodeName] = group;
    const episodeNum = parseInt(oldEpisodeNum, 10);

    if (episodeNum >= 14 && episodeNum <= 28) {
      const newEpisodeNum = episodeNum - 13;
      return {old: fn, new: `Dragonball S02E${newEpisodeNum}${episodeName}`}
    } else if (episodeNum >= 29 && episodeNum <= 68) {
      const newEpisodeNum = episodeNum - (28);
      return {old: fn, new: `Dragonball S03E${newEpisodeNum}${episodeName}`}
    } else if (episodeNum >= 69 && episodeNum <= 101) {
      const newEpisodeNum = episodeNum - (68);
      return {old: fn, new: `Dragonball S04E${newEpisodeNum}${episodeName}`}
    } else if (episodeNum >= 102 && episodeNum <= 132) {
      const newEpisodeNum = episodeNum - (101);
      return {old: fn, new: `Dragonball S05E${newEpisodeNum}${episodeName}`}
    } else if (episodeNum >= 133) {
      const newEpisodeNum = episodeNum - (132);
      return {old: fn, new: `Dragonball S06E${newEpisodeNum}${episodeName}`}
    } else {
      return {old: fn, new: `Dragonball S01E${episodeNum}${episodeName}`}
    }
  });

  await Promise.all(
    results.filter(x => x).map((result) => {
      return fs.promises.rename(`${rootDir}/${result.old}`, `${rootDir}/${result.new}`)
    })
  )
})();