106 lines
3.8 KiB
PowerShell
106 lines
3.8 KiB
PowerShell
function Invoke-PCMonitor {
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param(
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[string[]] $comps
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)
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# Ask to notify
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$notify = $(Read-Host "Notify with pop-up window? (y/N)") -match "^[yY]"
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if ($notify) {
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Add-Type -AssemblyName PresentationFramework
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}
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$sleepTime = $(Read-Host "Checkin interval in seconds (Default: 300 [5 min])")
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if (-not ($sleepTime)) { $sleepTime = 300 }
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$dogs = @()
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# Initialize computer sessions
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foreach ($comp in $comps) {
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$dog = [WatchDog]::new($comp)
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$null = $dog.Update()
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$dogs += $dog
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}
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while ($true) {
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foreach ($dog in $dogs) {
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$msg = $dog.ReportChange()
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if ($msg) {
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if ($notify) {
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$null = [System.Windows.MessageBox]::Show($msg)
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}
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Write-Host "$msg"
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}
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}
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Start-Sleep $sleepTime
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}
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}
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class WatchDog {
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[string]$Hostname
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[System.Management.Automation.Runspaces.PSSession]$Session
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[string]$LastUser
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WatchDog() { $this.Init(@{})}
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WatchDog([hashtable]$Properties) { $this.Init($Properties)}
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WatchDog([string]$Hostname) { $this.Init(@{Hostname = $Hostname})}
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[void] Init([hashtable]$Properties){
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foreach ($prop in $Properties.Keys) {
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$this.$prop = $Properties.$prop
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}
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}
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[string] ToString() {
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return `
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"Hostname: $($this.Hostname) `n" +
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"Status: $(if ($this.Session) { 'Online' } else { 'Offline' }) `n" +
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"User: $($this.LastUser) `n"
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}
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[WatchDog] Copy() {
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$props = @{}
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foreach ($prop in $this.PSObject.Properties) {
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$props.$($prop.Name) = $prop.Value
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}
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return [WatchDog]$props
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}
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# Returns true if a value was updated
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[bool] Update() {
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$old = $this.Copy()
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if (-not (Test-Connection -ComputerName $this.Hostname -Count 1)) {
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$this.Session = $null
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return ($old.Session)
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}
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if (-not ($this.Session)) {
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$this.Session = New-PSSession -ComputerName $this.Hostname -SessionOption (New-PSSessionOption -NoMachineProfile)
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}
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$this.LastUser = $(Invoke-Command -Session $this.Session {Get-ComputerInfo}).CSUserName
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if($null -eq $this.LastUser){
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$this.LastUser = (Invoke-Command -Session $this.Session -ScriptBlock {Get-Process Explorer -IncludeUsername | Where-Object { $_.Username -notlike "*SYSTEM" }} ).Username
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if($null -ne $this.LastUser){
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$this.LastUser = "$($this.LastUser) (RDP/Inactive)"
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}
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else{
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$this.LastUser = $null
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}
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}
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return (($this.Session -ne $old.Session) -or ($this.LastUser -ne $old.LastUser))
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}
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# Returns a message describing any changes
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[string] ReportChange() {
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$old = $this.Copy()
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if (-not ($this.Update())) { return $null }
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$date = Get-Date -Format "[MM/dd/yy HH:MM:ss]"
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if ($old.Session -ne $this.Session) {
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if ($old.Session -and $this.Session) {
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return "$date $($this.Hostname) | Session re-established"
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} elseif ($this.Session) {
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return "$date $($this.Hostname) | Online"
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} else {
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return "$date $($this.Hostname) | Offline"
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}
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} elseif ($old.LastUser -ne $this.LastUser) {
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if ($old.LastUser -and $this.LastUser) {
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return "$date $($this.Hostname) | $($old.LastUser) logged off and $($this.LastUser) logged on"
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} elseif ($old.LastUser) {
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return "$date $($this.Hostname) | $($old.LastUser) logged off"
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} else {
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return "$date $($this.Hostname) | $($this.LastUser) logged on"
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}
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}
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return $null
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}
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} |