Flatten folder

Flatten folder.ps1

# Define input and output directories
$input = "C:\Users\John\input"
$output = "C:\Users\John\output"

# Ensure the output directory exists
if (-not (Test-Path -Path $output)) {
    New-Item -ItemType Directory -Path $output
}

# Get full paths (to avoid relative path confusion)
$inputFull = (Get-Item $input).FullName
$outputFull = (Get-Item $output).FullName

# Get all files recursively from the input directory
Get-ChildItem -Path $inputFull -Recurse -File | ForEach-Object {
    $file = $_

    # Get the relative path from input directory
    $relativePath = $file.DirectoryName.Substring($inputFull.Length).TrimStart('\')

    # Replace backslashes in the relative path with underscores
    $relativePathUnderscore = $relativePath -replace '\\', '_'

    # Create the new file name with relative path included
    if ($relativePathUnderscore -ne '') {
        $newFileName = "${relativePathUnderscore}_$($file.Name)"
    } else {
        $newFileName = $file.Name
    }

    # Define the destination path
    $destination = Join-Path -Path $outputFull -ChildPath $newFileName

    # Copy the file
    Copy-Item -Path $file.FullName -Destination $destination -Force

    Write-Host "Copied '$($file.FullName)' to '$destination'"
}

Write-Host "All files have been copied successfully."