SCCM Hardware Inventory with Verification

This script will initiate a hardware inventory. It scans the InventoryAgent.log file for the initiation of the hardware inventory and then for the completion. The script will return an error code 1 if the initiation was ignored or it exceeded five minutes. The purpose of this is to verify a hardware inventory was actually initiated. I have had instances where I would execute a hardware inventory multiple times not knowing if it actually occurred. This script verifies that.

You can download the script from my GitHub site located here.

 <#  
      .SYNOPSIS  
           Initiate SCCM Hardware Inventory  
        
      .DESCRIPTION  
           This script will initiate an SCCM hardware inventory and return a 1 if it fails to initiate or a 0 if it is a success. The script works by scanning the InventoryAgent. log file for the status of the hardware inventory.  
        
      .EXAMPLE  
           powershell.exe -executionpolicy bypass -file SCCMActions.ps1  
        
      .NOTES  
           ===========================================================================  
           Created with:     SAPIEN Technologies, Inc., PowerShell Studio 2016 v5.2.122  
           Created on:       5/20/2016 2:28 PM  
           Created by:       Mick Pletcher  
           Filename:         SCCMActions.ps1  
           ===========================================================================  
 #>  
 [CmdletBinding()]  
 param ()  
   
 function Get-CurrentDate {  
 <#  
      .SYNOPSIS  
           Get the current date and return formatted value  
        
      .DESCRIPTION  
           Return the current date in the following format: mm-dd-yyyy  
        
      .NOTES  
           Additional information about the function.  
 #>  
        
      [CmdletBinding()][OutputType([string])]  
      param ()  
        
      $CurrentDate = Get-Date  
      $CurrentDate = $CurrentDate.ToShortDateString()  
      $CurrentDate = $CurrentDate -replace "/", "-"  
      If ($CurrentDate[2] -ne "-") {  
           $CurrentDate = $CurrentDate.Insert(0, "0")  
      }  
      If ($CurrentDate[5] -ne "-") {  
           $CurrentDate = $CurrentDate.Insert(3, "0")  
      }  
      Return $CurrentDate  
 }  
   
 function Invoke-HardwareInventoryCycle {  
 <#  
      .SYNOPSIS  
           Hardware Inventory Cycle  
        
      .DESCRIPTION  
           This function will invoke a hardware inventory cycle and it waits until the cycle is completed.  
        
      .EXAMPLE  
                     PS C:\> Invoke-HardwareInventoryCycle  
        
      .NOTES  
           Additional information about the function.  
 #>  
        
      [CmdletBinding()]  
      param ()  
        
      $Completed = $false  
      $StartTime = Get-Date -UFormat %R  
      $CurrentDate = Get-CurrentDate  
      Write-Host "Running Hardware Inventory Cycle....." -NoNewline  
      Start-ConfigurationManagerClientScan -ScheduleID "00000000-0000-0000-0000-000000000001"  
      Do {  
           Start-Sleep -Seconds 1  
           $CurrentTime = Get-Date -UFormat %R  
           $TimeDifference = New-TimeSpan -Start $StartTime -End $CurrentTime  
           $Log = Get-Content $env:windir"\ccm\logs\InventoryAgent.log"  
           $Count = $Log.count  
           $Count = $Count - 1  
           $Log = $Log[$Count]  
           $LogTable = $Log.split("<")[-1]  
           $LogTable = $LogTable.Substring(0, $LogTable.length - 1) -replace ' ', ';'  
           $LogTable = "@{$($LogTable)}" | Invoke-Expression  
           $LogTime = $LogTable.time.Substring(0, 5)  
           [datetime]$StringTime = $LogTable.time  
           If (($Log -like "*End of message processing*") -and ($CurrentDate -eq $LogTable.date) -and ($LogTime -ge $StartTime)) {  
                Write-Host "Completed" -ForegroundColor Yellow  
                $Success = $true  
                $Completed = $true  
           }  
           If (($Log -like "*already in queue. Message ignored.*") -and ($CurrentDate -eq $LogTable.date) -and ($LogTime -ge $StartTime)) {  
                Write-Host "Ignored" -ForegroundColor Red  
                $Success = $false  
                $Completed = $true  
           }  
           If ($TimeDifference.Minutes -ge 5) {  
                Write-Host "Failed" -ForegroundColor Yellow  
                $Success = $false  
                $Completed = $true  
           }  
      } while ($Completed -eq $false)  
      Return $Success  
 }  
   
 function Start-ConfigurationManagerClientScan {  
 <#  
      .SYNOPSIS  
           Initiate Configuration Manager Client Scan  
        
      .DESCRIPTION  
           This will initiate an SCCM action  
             
      .PARAMETER ScheduleID  
           GUID ID of the SCCM action  
      #>  
        
      [CmdletBinding()]  
      param  
      (  
           [ValidateSet('00000000-0000-0000-0000-000000000121', '00000000-0000-0000-0000-000000000003', '00000000-0000-0000-0000-000000000010', '00000000-0000-0000-0000-000000000001', '00000000-0000-0000-0000-000000000021', '00000000-0000-0000-0000-000000000022', '00000000-0000-0000-0000-000000000002', '00000000-0000-0000-0000-000000000031', '00000000-0000-0000-0000-000000000108', '00000000-0000-0000-0000-000000000113', '00000000-0000-0000-0000-000000000111', '00000000-0000-0000-0000-000000000026', '00000000-0000-0000-0000-000000000027', '00000000-0000-0000-0000-000000000032')]$ScheduleID  
      )  
        
      $WMIPath = "\\" + $env:COMPUTERNAME + "\root\ccm:SMS_Client"  
      $SMSwmi = [wmiclass]$WMIPath  
      $Action = [char]123 + $ScheduleID + [char]125  
      [Void]$SMSwmi.TriggerSchedule($Action)  
 }  
   
 Clear-Host  
 $Success = Invoke-HardwareInventoryCycle  
 If ($Success -eq $false) {  
      Exit 1  
 }