File watcher scripts

Watcher.ps1

# CLI params for starting and stoppping the watcher
param (
    [switch]$start = $false,
    [switch]$stop = $false
)

Function Register-Watcher {
    # Folder to watch
    param ($watchdir)

    $watchdir = "C:\Users\$env:USERNAME\Documents" # Root path to monitor
    $logfile = "c:\Users\$env:USERNAME\logfile.txt"

    # Filter all files and subdirectories
    $filter = "*.*"
    $watcher = New-Object IO.FileSystemWatcher $watchdir, $filter -Property @{
        IncludeSubdirectories = $true
        EnableRaisingEvents = $true
    }

    # Create the log file if it doesn't exist
    if (!(Test-Path "$logfile")) {
        New-Item -path "$logfile" -type file | Out-Null
    }

    # Define the FS watching behvior
    $action = {
        $path = $Event.SourceEventArgs.FullPath
        $name = $Event.SourceEventArgs.Name
        $changeType = $Event.SourceEventArgs.ChangeType
        $timeStamp = $Event.TimeGenerated
        #$console_message = "The file '$name' was '$changeType' at '$timeStamp'"
        #Write-Host $console_message
        $log_message = "$name, $changeType, $timeStamp"
        Out-File "C:\Users\$env:USERNAME\logfile.txt" -Append -InputObject $log_message
    }

    # Register the FS watcher
    Register-ObjectEvent $watcher Created -SourceIdentifier Created -Action $action
    Register-ObjectEvent $watcher Changed -SourceIdentifier Changed -Action $action
    Register-ObjectEvent $watcher Deleted -SourceIdentifier Deleted -Action $action
    Register-ObjectEvent $watcher Renamed -SourceIdentifier Renamed -Action $action

}

# Unregister the FS watcher
Function Unregister-Watcher() {
    Unregister-Event Created
    Unregister-Event Changed
    Unregister-Event Deleted
    Unregister-Event Renamed
}

Function Main() {

    # Start the watcher
    if ($start) {
        Write-Host "Starting FS watcher" -fore green
        Register-Watcher $watchdir
    }
    # Stop the watcher
    elseif ($stop) {
        Write-Host "Stopping FS watcher" -fore red
        Unregister-Watcher
    }
    # Otherwise error
    else {
        Write-Host "Invalid arguments"
        Write-Host $args.Length
    }
}

# Script entrypoint
Main

How will capture user details(AD) with same script?