<# Focus purely on Windows 7#>


$line_array = @()
$multi_array = @()
[hashtable]$my_hash = @{}
$Sender_IP = $NULL
$Win32OS = $NULL
$Build = $NULL
$folder = $NULL
$SysDrv = $NULL


foreach ($i in $args){
   $line_array+= $i.split(" ")
}

foreach ($j in $line_array){
    $multi_array += ,@($j.split("="))
}

foreach ($k in $multi_array){
    $my_hash.add($k[0],$k[1])
}


$Sender_IP = $my_hash.Get_Item("sender-email")

try{
    Test-Connection $Sender_IP -count 1 -ErrorAction Stop | out-null
}
catch [Exception]
{
    $userID = "userID=CannotPing"
    return $userID 
}

try{
    $OS = (Get-WmiObject Win32_OperatingSystem -ComputerName $Sender_IP -ErrorAction Stop).Name 
}
catch [Exception]{
    $userID = "userID=CannotAuthenticate"
    return $userID
}

try{
    $Win32OS = Get-WmiObject -Class Win32_OperatingSystem -ComputerName $Sender_IP -ErrorAction Stop
}
catch [Exception]{
    $userID = "userID=CannotAuthenticate"
    return $userID
}


$SysDrv = $Win32OS.SystemDrive
$SysDrv = $SysDrv.Replace(":","$")
$ProfDrv = "\\" + $Sender_IP + "\" + $SysDrv
$ProfLoc = Join-Path -Path $ProfDrv -ChildPath "Users"

if (!(Test-Path $ProfLoc)){
    $ProfLoc = Join-Path -Path $ProfDrv -ChildPath "Documents and Settings"
}


try{
    $userID = Get-ChildItem $ProfLoc | ? { $_.PsIsContainer} | Sort LastWriteTime -Descending | Select -expand  Name -First 1   
    $userID = "userID="+$userID
    
}catch [Exception]
{
    $userID = "userID=CannotFindLastUser"
    return $userID
}
    

    
if ($userID -eq "userID=All Users"){
    $userID = (get-wmiobject win32_computersystem -computer $Sender_IP).UserName
    $userID = "userID="+$userID 
    return $userID
}
else{
    return $userID
}