WDACConfig

0.3.8

XMLOps/Close-EmptyXmlNodes_Semantic.psm1

                                Function Close-EmptyXmlNodes_Semantic {

    <#

    .SYNOPSIS

        Closes all empty XML nodes and removes empty nodes that are neither base nodes nor 'ProductSigners' nodes

        According to the CI Schema

        For example, it converts this

    <SigningScenario Value="12" ID="ID_SIGNINGSCENARIO_WINDOWS" FriendlyName="Auto generated policy on 03-13-2024">

      <ProductSigners>

        <AllowedSigners>

        </AllowedSigners>

      </ProductSigners>

    </SigningScenario>

    Or this

    <SigningScenario Value="12" ID="ID_SIGNINGSCENARIO_WINDOWS" FriendlyName="Auto generated policy on 03-13-2024">

      <ProductSigners>

        <AllowedSigners />

      </ProductSigners>

    </SigningScenario>

    to this

    <SigningScenario Value="12" ID="ID_SIGNINGSCENARIO_WINDOWS" FriendlyName="Auto generated policy on 03-13-2024">

      <ProductSigners />

    </SigningScenario>

    .PARAMETER XmlFilePath

        The path to the XML file to be processed

    .INPUTS

        System.IO.FileInfo

    .OUTPUTS

        System.Void

    #>

    [CmdletBinding()]

    [OutputType([System.Void])]

    param (

        [Parameter(Mandatory = $true)][System.IO.FileInfo]$XmlFilePath

    )

    Begin {

        # Importing the $PSDefaultParameterValues to the current session, prior to everything else

        . "$ModuleRootPath\CoreExt\PSDefaultParameterValues.ps1"

        # Define the base node names that should not be removed even if empty

        [System.String[]]$BaseNodeNames = @('SiPolicy', 'Rules', 'EKUs', 'FileRules', 'Signers', 'SigningScenarios', 'UpdatePolicySigners', 'CiSigners', 'HvciOptions', 'BasePolicyID', 'PolicyID')

        Function Close-EmptyNodesRecursively {

            <#

            .SYNOPSIS

                Helper function to recursively close empty XML nodes

            #>

            param (

                [Parameter(Mandatory = $true)][System.Xml.XmlElement]$XmlNode

            )

            foreach ($ChildNode in $XmlNode.ChildNodes) {

                if ($ChildNode -is [System.Xml.XmlElement]) {

                    # Recursively close empty child nodes

                    Close-EmptyNodesRecursively -XmlNode $ChildNode

                    # Check if the node is empty

                    if (-not $ChildNode.HasChildNodes -and -not $ChildNode.HasAttributes) {

                        # Check if it's a base node

                        if ($BaseNodeNames -contains $ChildNode.LocalName) {

                            # self-close it

                            $ChildNode.IsEmpty = $true

                        }

                        # Special case for ProductSigners because it's a required node inside each SigningScenario but can't be empty

                        elseif ($ChildNode.LocalName -eq 'ProductSigners') {

                            # self-close it

                            $ChildNode.IsEmpty = $true

                        }

                        else {

                            # If it's not a base node, remove it

                            [System.Void]$ChildNode.ParentNode.RemoveChild($ChildNode)

                        }

                    }

                }

            }

        }

    }

    Process {

        # Load the XML file

        [System.Xml.XmlDocument]$Xml = Get-Content -Path $XmlFilePath

        # Start the recursive function from the root element

        Close-EmptyNodesRecursively -XmlNode $Xml.DocumentElement

    }

    End {

        # Save the changes back to the XML file

        $Xml.Save($XmlFilePath)

    }

}

Export-ModuleMember -Function 'Close-EmptyXmlNodes_Semantic'

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