Write-Bates.ps1

<#
.SYNOPSIS
Adds Bates numbering to the names of native files

.DESCRIPTION
Takes a single directory with native files, performs a backup of the native files, confirms the prefix, digits, and starting Bates number, and then writes a log to the console while renaming files.

.PARAMETER Directory
Enter full path to directory with files to be renamed

.PARAMETER Prefix
Enter prefix to prepend to Bates number

.PARAMETER Length
Enter number of digits that determine the amount of leading zeroes

.PARAMETER StartRange
Enter first Bates number value, without any leading zeroes

.INPUTS
Native files in a single directory

.OUTPUTS
Bates number appended to all files in directory
  
.NOTES
Version: 1.1
Author: Evan Ribbey
Created: 4/15/20
  
.EXAMPLE
Write-Bates.ps1 -Directory C:\nativefiles -Prefix EXC -Length 8 -StartRange 4258
#>

param(
  [Parameter(Mandatory)]
  [string]$Directory,
  [string]$Prefix,
  [int]$Length,
  [string]$StartRange
)
$batesPad = $startRange.PadLeft($length, '0') # create leading zeroes based off Length parameter
Write-Host "-----------------"
Write-Host "Location of native files: $directory"
Write-Host "Starting Bates number: " $Prefix$batesPad
Write-Host "-----------------"
$confirm = Read-Host "Are the above details correct? Y/N: " # visually confirm details before beginning
if ($confirm -eq "Y") {
  $files = Get-ChildItem -Path $directory
  $maxFiles = $files | Measure-Object
  $date = Get-Date -Format "yyyyMMddhhmm"
  $backupFolderName = "native_backup_$date"
  New-Item -Path "$directory\$backupFolderName" -ItemType Directory | Out-Null
  $count = 0
  ForEach ($file in $files) {
    $percent = $count/$maxFiles.Count*100
    Write-Progress -Activity "Bates numbering in progress..." -Status "Status: $percent" -PercentComplete ($percent)
    Copy-Item -Path $file -Destination "$directory\$backupFolderName"
    $currentFileName = $file.Name
    $batesPad = $startRange.PadLeft($length, '0')
    $newFileName = $prefix + "$batesPad" + "-" + $currentFileName
    Rename-Item -Path $file.FullName -NewName $newFileName
    Write-Host "$currentFileName renamed to $newFileName"
    $startInt = $startRange -as [int]
    $startInt++
    $startRange = $startInt -as [string]
    $count++
  }
  Write-Host "Bates numbering completed for $count native files in $directory"
  $finalize = Read-Host "Would you like to remove the automatic backup? Y/N: "
  if ($finalize -eq "Y") {
    Remove-Item -Path "$directory\$backupFolderName" -Recurse
    Write-Host "Backup removed."
  }
}
else {
  break
}