rename a bunch of files, remove white space with powershell

filerenamer.ps1

# Get all .docx files in the current directory
$files = Get-ChildItem -Filter "*.docx"

# Check if any files were found
if ($files.Count -eq 0) {
    Write-Host "No .docx files found in the current directory."
    exit
}

# Display current files
Write-Host "`nCurrent .docx files found:"
Write-Host "------------------------"
$files | ForEach-Object { Write-Host $_.Name }

# Prompt for prefix string
Write-Host "`nEnter the string to prepend to the filenames:"
$prefix = Read-Host
# Clean up the prefix by removing whitespace
$prefix = $prefix -replace '\s+', '_'
Write-Host "Using prefix: $prefix"

# Show preview of new filenames
Write-Host "`nNew filenames will be:"
Write-Host "--------------------"
$newNames = @()
foreach ($file in $files) {
    # Replace whitespace with underscores
$cleanName = $file.Name -replace '\s+', '_'
$newName = "$prefix$cleanName"
    $newNames += @{
        OldName = $file.Name
        NewName = $newName
    }
    Write-Host "$($file.Name) -> $newName"
}

# Confirm rename
Write-Host "`nDo you want to rename these files? (Y/N)"
$confirm = Read-Host

if ($confirm.ToUpper() -eq 'Y') {
    foreach ($item in $newNames) {
        try {
            Rename-Item -Path $item.OldName -NewName $item.NewName -ErrorAction Stop
            Write-Host "Renamed: $($item.OldName) -> $($item.NewName)" -ForegroundColor Green
        }
        catch {
            Write-Host "Error renaming $($item.OldName): $_" -ForegroundColor Red
        }
    }
    Write-Host "`nFile rename operation completed."
}
else {
    Write-Host "`nFile rename operation cancelled."
}