To be used with Script Kit to rename a batch of files

Batch Rename Files

// Name: rename ordered files
// Author: Lucas Steinmacher
// Description: renames a batch of ordered files with a prefix that you supply and starting at a given index that you supply
import "@johnlindquist/kit"
import fs from "fs"

// Note: Dropping one or more files returns an array of file information
// Dropping text or an image from the browser returns a string
let fileInfos = await drop()

cd(path.dirname(fileInfos[0].path));

let startInput = await arg("whats the number of the first file?")
let filenamePrefix = await arg("whats the prefix of the files?")

// For debugging only
dev(iterateOverFileInfo(fileInfos, startInput, filenamePrefix))

function iterateOverFileInfo(fileInfos, start, fileNamePrefix) {
  // This array is for debugging only and holds the [newFileName, oldFileName]
  let newFileNames = [];

  // memoize the names with their correct number in case the files are out of order
  let fileNameDict = {};
  let i = start;

  fileInfos.forEach(fileInfo => {
    let curFileSuffix = fileInfo.name.slice(-4);
    let curFileName = fileInfo.name.slice(0, -4);

    if (!(curFileName in fileNameDict)) {
      fileNameDict[curFileName] = i;
      i++;
    }

    const newFileName = `${fileNamePrefix}-part${fileNameDict[curFileName]}${curFileSuffix}`
    fs.rename(fileInfo.name, newFileName, (e) => console.error(e.message))

    newFileNames.push([newFileName, fileInfo])
    })
  return newFileNames;
}