ps/Modules/Alkami.PowerShell.ServerManagement/Public/Test-Server.ps1

function Test-Server{
    <#
.SYNOPSIS
    validate mininum software requirement on server
.PARAMETER dotNetMinimumVersion
    The minimum .NET version allowed to be installed.  Throws if the version is less than this value.  Defaults to 4.7.1
#>
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingInvokeExpression', '', Justification = 'Alkami generates this string manually, no user injection')]
    [CmdletBinding()]
    Param(
        [string]$dotNetMinimumVersion = "4.7.1"
    )

    $logLead  = (Get-LogLeadName);

    Write-Output ("$logLead : Checking Powershell Version")
    if ($PSVersionTable.PSVersion.Major -lt 5 -or ($PSVersionTable.PSVersion.Major -eq 5 -and $PSVersionTable.PSVersion.Minor -eq 0)) {
        Write-Warning ("$logLead : PowerShell 5.1 or Higher is Required.  Detected version: {0}" -f $PSVersionTable.PSVersion)
        throw ("$logLead : PowerShell 5.1 or Higher Required | https://go.microsoft.com/fwlink/?linkid=839516")
    }

    Write-Output ("$logLead : Ensuring Chocolatey Version >= V0.10.11")
    $currentChocolateyVersion = (Invoke-Expression "choco --version" -ErrorAction SilentlyContinue)
    $version = New-Object System.Version($currentChocolateyVersion)

    if (($null -ne $version) -and ($version.Minor -ge 10 -or ($version.Minor -eq 10 -and $version.Build -ge 11))) {

        Write-Output ("$logLead : Chocolatey Version is 0.10.11 or greater.  Detected version: {0}" -f $currentChocolateyVersion)
    }
    elseif ($null -eq $currentChocolateyVersion)
    {
        Write-Warning ("$logLead : Chocolatey Not Found -- Attempting to Install")
        Set-ExecutionPolicy Bypass -Scope Process -Force;Invoke-Expression ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))
    }
    else
    {
        Write-Warning ("$logLead : Detected Chocolatey Version {0} -- Attempting to Upgrade" -f $logVersion)
        choco upgrade chocolatey -y --version 0.10.11 -s="https://chocolatey.org/api/v2/"
    }

    Write-Output ("$logLead : Ensuring that a chocolatey feed source URL is not configured multiple times, and that SDK feeds are authenticated.")
    $knownFeeds = @{}
    $sources = choco source list -r
    foreach($source in $sources)
    {
        $properties = $source.Split("|")
        $feedName = $properties[0]
        $feedUrl = $properties[1]
        $isDefaultFeed = $feedName -eq "chocolatey";
        $isSdkFeed = (!$isDefaultFeed) -and ($feedUrl -notlike "*packagerepo.orb.alkamitech.com*");
        $isDisabled = if ($properties[2] -like "true") { $true; } else { $false; }
        $authUser = $properties[3]

        if($isDisabled)
        {
            Write-Host "Skipping choco feed $feedName because it is disabled."
            continue
        }

        # Check that the every feed URL is only configured once.
        if($knownFeeds.ContainsKey($feedUrl))
        {
            throw "The feed '$feedUrl' is configured multiple times. Remove one of them!"
        }
        else
        {
            Write-Host "Discovered feed '$feedUrl'"
            $knownFeeds[$feedUrl] = 1
        }

        # Check that SDK feeds are authenticated.
        if($isSdkFeed -and [string]::IsNullOrWhiteSpace($authUser))
        {
            throw "The SDK feed '$feedName' at source '$feedUrl' is not authenticated. Add credentials to this source!"
        }
        else
        {
            Write-Host "SDK Feed '$feedName' is authenticated."
        }
    }

    Write-Output ("$logLead : Checking for 7-Zip in the System Path Variable")
    $paths = [Environment]::GetEnvironmentVariable("Path", "Machine")
    if ($paths -notmatch '7-Zip') {

        Write-Warning ("$logLead : 7-Zip Install Directory Not Found in the System Path Variable")
        throw ("$logLead : Verify 7-Zip Installed & System Env:Path Added")
    } elseif (!(Invoke-Expression 7z.exe)){

        Write-Warning ("$logLead : Could Not Invoke 7z.exe")
        throw ("$logLead : 7-Zip Could Not be Called")
    }

    Write-Output ("$logLead : Checking .NET Framework Version")
    $dotNetVersion = Get-DotNetVersion
    $dotNetMinimumKey = ([array]($Global:DotNetVersionTranslation | Where-Object {$_.FriendlyVersion -match $dotNetMinimumVersion}) | Select-Object -First 1).Key

    if ($dotNetVersion.Key -ge $dotNetMinimumKey) {

        Write-Host ("$logLead : .NET Framework {0} or higher detected, version = '{1}'" -f $dotNetMinimumVersion, $dotNetVersion.FriendlyVersion)
    }
    else {
        Write-Verbose ("$logLead : Minimum Version Key: {0}" -f $dotNetMinimumKey)
        Write-Verbose ("$logLead : Detected Version Key: {0}" -f $dotNetVersion)
        $dotNetError = ("$logLead : .NET Framework {0} or Higher is Required, but Found Version '{1}'" -f $dotNetMinimumVersion, $dotNetVersion.FriendlyVersion)
        Write-Warning $dotNetError
        throw ($dotNetError)
    }

    $requiredProducts = @(
        "Microsoft Web Platform Installer 5",
        "Microsoft Application Request Routing 3"
        "IIS URL Rewrite Module 2"
    )

    Write-Output "$logLead : Checking for Microsoft Web Platform Installer 5+ and Required Components"
    $installedProducts = Get-CIMInstance -Class Win32_Product | Select-Object -ExpandProperty Name

    $allProductsInstalled = $true
    foreach ($product in $requiredProducts) {

        if ($installedProducts -match $product)
        {
            continue;
        }

        $allProductsInstalled = $false
        Write-Warning ("$logLead : Required Component <{0}> Not Found" -f $product)
    }

    if (!($allProductsInstalled)) {
        throw "$logLead : One or More Required Components Not Found"
    }
    else
    {
        Write-Output ("$logLead : All Expected Components Found")
    }

	Write-Output "$logLead : Validating that both machine.config files are valid xml"
	# This only checks that the files are valid xml. If they don't conform to MS's schema, that's a different issue that won't be caught here.
	try
	{
		[xml]$XmlDocument = Read-MachineConfig $false

		Write-Host "$logLead : Loaded 32 bit machine.config without issues."
	}
	catch [System.SystemException]
	{
		Write-Warning "Something's broken, something's broken..."
		Write-Warning $_.exception.message
		throw
	}

	try
	{
		[xml]$XmlDocument = Read-MachineConfig

		Write-Host "$logLead : Loaded 64 bit machine.config without issues."
	}
	catch [System.SystemException]
	{
		Write-Warning "Something's broken, something's broken..."
		Write-Warning $_.exception.message
		throw
	}
}