Powershell - Download the latest FTP files from Ftp server

Question

Hello everybody I've been strugglling for many days now with this, I would like to get some help. What I am trying to do is to download the latest files from FTP server but what I've got here is going to download all the files from the ftp server !!! I don't know how to add condition in a powershell script I'm a newbie to this. Gonna drop what I have for now just here.

So please let me know if any additional information is required and I will provide it immediately, thanks again for your help.

`Write-Host "Please wait while your file downloads"

  #Function to get all files
  function Get-FtpDir ($url,$credentials)
  {
   $request = [Net.WebRequest]::Create($url)
   $request.Credentials = $credentials
   $request.Method = [System.Net.WebRequestMethods+FTP]::ListDirectory
   $response = $request.GetResponse()
   $reader = New-Object IO.StreamReader $response.GetResponseStream()
   $readline = $reader.ReadLine()
   $output = New-Object System.Collections.Generic.List[System.Object]
   while ($readline -ne $null)
   {
      $output.Add($readline)
      $readline = $reader.ReadLine()
   }
  $reader.Close()
  $response.Close()
  $output
  }

 $server = 'ftp.xxxx.xxx'
 $user = 'xxxxx'
 $pass = 'xxxxxxxxx'

 $localfilelocation = 'C:\Users\Lala\Desktop\test\'
 $uri = New-Object System.Uri("ftp://$server/")

#List of all files on FTP-Server
$files = Get-FTPDir $uri -credentials (New-Object System.Net.NetworkCredential($user,     $pass))

 foreach ($file in $files)
 {
  if ($file)
  {
     $file
     $path = "$localfilelocation\$file"
     $fileuri = New-Object System.Uri("ftp://$server/$file")
     $webclient = New-Object System.Net.WebClient
     $webclient.Credentials = New-Object System.Net.NetworkCredential($user, $pass)
     $webclient.DownloadFile($fileuri,$path )
 }

}