Renames replays from TL tournament system to be under 32 characters in length.

rename.js

import fs from 'fs'

fs.readdir('.', (err, files) => {
  if (err) {
    console.log('err: ' + err)
    return
  }

  files.forEach((file) => {
    if (!file.endsWith('.rep')) {
      console.log(file + ' is not a replay.')
      return
    }

    const roundNumber = file.slice(1, 2)
    const gameNumber = file.slice(-5, -4)
    const index = file.indexOf('_vs_')
    if (index === -1) {
      console.log(file + ' is in wrong filename format')
      return
    }
    let player1 = file.slice(3, index)
    let player2 = file.slice(index + 4, -11)
    
    if (player1.length > 9) {
      player1 = player1.slice(0, 9)
    }
    if (player2.length > 9) {
      player2 = player2.slice(0, 9)
    }

    const newFile = 'R' + roundNumber + '_' + player1 + '_v_' + player2 + '_G' + gameNumber + '.rep'
    if (newFile.length > 31) {
      console.log(newFile + ' is still too long. Rename it manually please.')
      return
    }
    fs.rename(file, newFile, () => console.log('Renamed ' + file + ' -> ' + newFile))
  })
})