external_facts.ps1

# site
$fact = 'site'
Try {$factvalue = $([System.DirectoryServices.ActiveDirectory.ActiveDirectorySite]::GetComputerSite().Name)}
Catch {$factvalue = 'unknown'}
Write-Host "$fact=$factvalue"

# exchange_server
$service = 'Microsoft Exchange*'
$fact = 'exchange_server'
if ((Get-Service -DisplayName "$service" | Measure-Object).Count -gt 5)
{$factvalue = 'true'}
else
{$factvalue = 'false'}
Write-Host "$fact=$factvalue"

# exchange_server_version
if ($factvalue -eq 'true')
{
    $program = 'Microsoft Exchange Server'
    $fact = 'exchange_server_version'
    $x86 = ((Get-ChildItem 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall') | Where-Object { $_.GetValue( 'DisplayName' ) -eq "$program"})
    $x64 = ((Get-ChildItem 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall') | Where-Object { $_.GetValue( 'DisplayName' ) -eq "$program"})
    if ($x64)
    {
        $factvalue = $x64.GetValue('DisplayVersion')
        Write-Host "$fact=$factvalue"
    }
    elseif ($x86) 
    {
        $factvalue = $x86.GetValue('DisplayVersion')
        Write-Host "$fact=$factvalue"
    }
}

# sharepoint_server
$service = 'SharePoint*'
$fact = 'sharepoint_server'
if ((Get-Service -DisplayName "$service" | Measure-Object).Count -gt 5)
{$factvalue = 'true'}
else
{$factvalue = 'false'}
Write-Host "$fact=$factvalue"

# sharepoint_server_version
if ($factvalue -eq 'true')
{
    $program = 'Microsoft SharePoint Server 2010'
    $fact = 'sharepoint_server_version'
    $x86 = ((Get-ChildItem 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall') | Where-Object { $_.GetValue( 'DisplayName' ) -eq "$program"})
    $x64 = ((Get-ChildItem 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall') | Where-Object { $_.GetValue( 'DisplayName' ) -eq "$program"})
    if ($x64)
    {
        $factvalue = $x64.GetValue('DisplayVersion')
        Write-Host "$fact=$factvalue"
    }
    elseif ($x86) 
    {
        $factvalue = $x86.GetValue('DisplayVersion')
        Write-Host "$fact=$factvalue"
    }
}

# TODO: Update other facts to use this same method for true\false
# fips_algorithm_policy_enabled
$fact = 'fips_algorithm_policy_enabled'
$factvalue = (Get-ItemProperty -Path Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\FIPSAlgorithmPolicy -Name Enabled).Enabled -eq 1
Write-Host "$fact=$factvalue".ToLower()

# interfaceindex is used to determine front_nic_name and front_nic_dns facts
$interfaceindex = ((Get-WMIObject Win32_IP4RouteTable -Filter "Destination = '0.0.0.0'" | Sort-Object -Property "Metric1") | Select-Object -First 1).InterfaceIndex
# front_nic_name
$fact = 'front_nic_name'
$factvalue = (Get-WMIObject Win32_NetworkAdapter | Where-Object {$_.InterfaceIndex -eq $interfaceindex}).NetConnectionID
Write-Host "$fact=$factvalue"
# front_nic_dns
$fact = 'front_nic_dns'
$factvalue = ((Get-WmiObject Win32_NetworkAdapterConfiguration |Where-Object {$_.InterfaceIndex -eq $interfaceindex} | ForEach-Object {$_.DNSServerSearchOrder}) -Join ',').TrimEnd(',')
Write-Host "$fact=$factvalue"