Ondrej Sevecek's English Pages

param(
  [string] $targetClassId = [Guid]::NewGuid().ToString('b'), # Note: replace with $MPElement$
  [string] $targetInstId = [Guid]::NewGuid().ToString('b'), # Note: replace with $Target/Id$

  [string] $computerName = ('{0}.{1}' -f (gwmi Win32_ComputerSystem).DnsHostName, (gwmi Win32_ComputerSystem).Domain)
  )

$errorActionPreference = 'Stop'

# Note: if the caller does not supply the $targetClassId we assume 
#       it must be run from command line in a debug session. Note
#       that the parameter name is case-sensitive
# Note: PowerShell 2.0 does not have .Contains() method on [string[]] type
[bool] $fromCmd = -not ([Collections.ArrayList] $PSBoundParameters.Keys).Contains('targetClassId')

[__ComObject] $scom = New-Object -Com MOM.ScriptAPI
[__ComObject] $discoData = $scom.CreateDiscoveryData(0, $targetClassId, $targetInstId)

[bool] $ok = (-not [object]::Equals($scom, $null)) -and (-not [object]::Equals($discoData, $null))
if (-not $ok) { throw 'SEVECEK: An error occured during the very script initialization' }


function MSG (
    [string] $message,
    [ValidateRange(10001,19999)] [int] $id = 10001,
    [ValidateSet('info', 'warn', 'err')] [string] $type = 'info',
    [switch] $dbg
    )
{
  [int] $evType = 0

  # Note: cannot use host's colors here because the script is not running
  #       with a console and the colors are $null in HealthService
  [string] $color = 'Yellow'

  switch ($type) {

    'info' { $evType = 0 ; $color = 'Yellow' }
    'warn' { $evType = 1 ; $color = 'Magenta' }
    'err' { $evType = 2 ; $color = 'Red' }
  }

  if (-not $dbg) { $scom.LogScriptEvent('SEVECEK Script', $id, $evType, $message) }
  if ($fromCmd) { Write-Host ('{0,5}: {1,4}: {2}' -f $id, $type, $message) -Fore $color }
}

# Note: would not display if we are not running from cmd
MSG -dbg 'Running from cmd'

#
#
#


[Collections.ArrayList] $foundInstances = @()

try {


  for ($i = 1; $i -le 2; $i++) {

    [PSCustomObject] $newInstance = New-Object PSCustomObject
    Add-Member -Input $newInstance -MemberType NoteProperty -Name display -Value 'Sevecek test object 1'

    [void] $foundInstances.Add($newInstance)
  }



} catch {

  $exp = $_.Exception
  [string] $expMsg = ''
  [string[]] $errorCodes = @()

  do {

    $expMsg = "{0}`r`n{1}" -f $expMsg, $exp.Message

    function ConvertTo-StringError($value)
    {
       [string] $strValue = ''
       if (-not ([object]::Equals($value, $null))) {

          $strValue = '{0}' -f $value
          [string] $hexElement = ''
          try { $hexElement = '0x{0:X8}' -f $value } catch { }
          if ($hexElement -ne '') { $strValue = '{0} ({1})' -f $strValue, $hexElement }
       }

       return $strValue.Trim()
    }

    $errorCodes += ConvertTo-StringError $exp.HResult
    $errorCodes += ConvertTo-StringError $exp.ErrorCode
    $errorCodes += ConvertTo-StringError $exp.ErrorCode.value__

    $exp = $exp.InnerException

  } while (-not ([object]::Equals($exp, $null)))

  MSG ("SEVECEK: An error occured during script execution: {0}`r`nError codes: {1}" -f $expMsg, (($errorCodes | ? { $_ -ne '' }) -join ' | ')) 19999 err 
  $ok = $false
}



foreach ($oneFoundInstance in $foundInstances) {

  [__ComObject] $newInst = $discoData.CreateClassInstance('$MPElement[Name="Sevecek.Monitoring.SensitiveUser"]$')

  $newInst.AddProperty('$MPElement[Name="Windows!Microsoft.Windows.Computer"]/PrincipalName$', $computerName)

  $newInst.AddProperty('$MPElement[Name="System!System.Entity"]/DisplayName$', $oneFoundInstance.display)
  $newInst.AddProperty('$MPElement[Name="Sevecek.Monitoring.Base"]/LastRunTime$', [DateTime]::Now)
  $newInst.AddProperty('$MPElement[Name="Sevecek.Monitoring.Base"]/ScriptError$', (-not $ok))

  $discoData.AddInstance($newInst)
}



#
#
#

if ($fromCmd) {

  # Note: when running debug from command line we return the XML
  #       to take a look. The .Return() method does not have a return
  #       value, it writes the output XML into console (not stdout) directly
  $scom.Return($discoData)
  Write-Host; MSG -dbg 'Finished.'

} else {

  # Note: when running from a module data source we return
  #       the pure object to be handled completelly by the caller
  return $discoData
}