#requires -version 2

Function Delete-InactiveProfiles {

<#
    .SYNOPSIS 
     FileName: Delete-InactiveProfiles.ps1
     Author:   Alan dot Kaplan at VA dot GOV
     Date:     10-4-2013

     Written to replace DelProf, this script deletes inactive user profiles from a local or remote computer.  

     It supports arguments by position, and has a test parameter
     If you run it locally, you may supply host name, localhost or "."
     The logfile is tab delimited, you may use XLS extension to open in Excel.  
     If you run the script interactively the log opens when the action is complete.

    .Parameter Computername
    The name of the computer

    .Parameter InactiveDays
    The number of days which have been passed before considering a profile inactive.
    The logfile is tab delimited, you may use XLS extension to open in Excel. 

    .Parameter LogFile
    The full path to the logfile. 
     
    .Parameter OverwriteLog
    If present, the log will be overwritten.
    
    .Parameter WhatIf
    If present, the script will run in test mode.  No changes are made.

    .EXAMPLE
     Delete-InactiveProfiles.ps1 Server1 90 c:\mylogs\logfile.txt
     Delete profiles from Server1 older than 90 days and log results to c:\mylogs\logfile.txt
    
    .EXAMPLE
     Delete-InactiveProfiles.ps1 -ComputerName Server1 -InactiveDays 30 -logfile "c:\my logs\logfile.txt" -WhatIf
     Preview results of running a deletion of profiles from Server1 older than 30 days and log results to "c:\mylogs\logfile.txt"

     .LINK
     www.akaplan.com/blog/2013/10/delete-inactive-user-profiles-with-powershell

     .DESCRIPTION
     PowerShell Function to delete old profiles

#>


param(

       [Parameter(Mandatory=$True,Position=1)]
       [string] $ComputerName, 

       [Parameter(Mandatory=$True,Position=2)]
       [int]$InactiveDays, 

       [Parameter(Mandatory=$False,Position=3)]
       [string] $LogFile,     
       
       [Parameter(Mandatory=$False,Position=4)]
       [switch] $OverwriteLog, 
       
       [Parameter(Mandatory=$False,Position=5)]
       [switch] $WhatIf
)


Function EchoAndLog { param([string] $strText)
	#Echo to host and append to file
    Tee-Object -Append -FilePath $logfile -inputobject $strText 
}

###################### Script begins ######################
$ErrorActionPreference = "Stop"

#Define default log
$lfd = $env:userprofile + "\desktop\$ComputerName" + "_UserProfileDeleteLog.txt"

#prompt for logfile
if (!$LogFile){
    $logfile = Read-Host "Enter Path to tab delimited Logfile, or ENTER for default,`n$lfd"
}

#use default log if not specified
if ($LogFile.Length -eq 0) {$LogFile = $lfd}

#Delete old log if OverwriteLog set
if ($OverwriteLog) {Remove-Item $LogFile -Force}

#If log is new, add header
if ((Test-Path $logfile) -eq $False) {
    $header = "Date`tPath`tDaysSinceUsed"
    Out-File -FilePath $logfile -inputobject $header
}

#special handling of alternate names for the local system
if (($ComputerName.ToLower() -eq "localhost") -or ($ComputerName -eq ".")){
    $ComputerName = $env:COMPUTERNAME
}

#WMI query excludes Administrator account and local service accounts
Get-WmiObject Win32_UserProfile -filter "not SID like '%-500' and Special = False" -ComputerName $ComputerName  |
    ForEach-Object{
        $ProfilePath = "\\$computername\"+$_.LocalPath.Replace(":","$")
        if ((test-Path $ProfilePath)-eq $false) {
            remove-wmiobject -inputobject $_ -WhatIf:$WhatIf
            EchoAndLog "$(Get-Date)`t$ProfilePath`t`tNot Found"
        }ELSE{
            #I think getting timestamp from NTUser.DAT is more reliable than WMI LastUseTime
            $LastUsedDays = ((get-date)-(Get-Item -force "$profilePath\ntuser.dat").LastWriteTime).days
            $LastUsedDays = [math]::abs($LastUsedDays)
            if($LastUsedDays -gt $InactiveDays){
                #WMI to delete the profile
                remove-wmiobject -inputobject $_ -WhatIf:([bool]$WhatIf)
                $strTxt = "$(Get-date)`t$ProfilePath`t$LastUsedDays`t"
                if($WhatIf -eq $false){
                    $strTxt += "Deleted"
                    }ELSE{
                    $strTxt += "Would be Deleted"
                    }
                EchoAndLog $strTxt
            }Else{ 
                write-host "Skipping $ProfilePath, used within $LastUsedDays days"} 
            }
    }

#Open logfile if done interactively
if ($args.count -eq 0) { Invoke-Item $logfile }
}