How do I reformat an existing XML document with PowerShell - powershell

Question

I'm trying to update an XML document from this:
<Enclave id="OLD">
<device>
<name>MGMT</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
</Enclave>
<Enclave id="NEW">
<device>
<name>G-VDS-GooD</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
<device>
<name>G-VDS-ENC001</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
<device>
<name>G-VDS-ENC002</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
</Enclave>
To this:
<Enclave id="OLD">
<device>
<name>MGMT</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
</Enclave>
<Enclave id="NEW">
<device>
<name>G-VDS-GooD</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
<device>
<name>G-VDS-ENC001</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<cert>
<inform>PEM</inform>
<outform>PEM</outform>
<name>G-VDS-ENC001</name>
<type>WEBServer</type>
<pwd>Password</pwd>
<altSubject />
</cert>
<RequireCert>1</RequireCert>
</device>
<device>
<name>G-VDS-ENC002</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<cert>
<inform>PEM</inform>
<outform>PEM</outform>
<name>G-VDS-ENC002</name>
<type>WEBServer</type>
<pwd>Password</pwd>
<altSubject />
</cert>
<RequireCert>1</RequireCert>
</device>
</Enclave>
I've written some PowerShell commands (see below) but only have been able to get this far:
<Enclave id="OLD">
<device>
<name>MGMT</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
</Enclave>
<Enclave id="NEW">
<device>
<name>G-VDS-GooD</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<inform>PEM</inform>
<outform>PEM</outform>
<RequireCert>0</RequireCert>
</device>
<device>
<name>G-VDS-ENC001</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<cert>
<inform>PEM</inform>
<outform>PEM</outform>
<type>WEBServer</type>
<pwd>Password</pwd>
<altSubject />
</cert>
<RequireCert>0</RequireCert>
</device>
<device>
<name>G-VDS-ENC002</name>
<type>VoIP</type>
<vlan>Voice2Network</vlan>
<cert>
<inform>PEM</inform>
<outform>PEM</outform>
<type>WEBServer</type>
<pwd>Password</pwd>
<altSubject />
</cert>
<RequireCert>1</RequireCert>
<RequireCert>0</RequireCert>
</device>
</Enclave>
Here is my PowerShell code:
$LoadType = "NEW"
$FileName = "C:\Voip.xml"
[xml]$FileOriginal = Get-Content $FileName
$Pattern = $FileOriginal.SelectNodes("/Configuration/Enclave[#id = `"$LoadType`"]/device[name[contains(text(), 'G-VDS-ENC')]]")
foreach($Pat in $Pattern) {
$inform = $FileOriginal.SelectSingleNode("/Configuration/Enclave[#id = `"$LoadType`"]/device[name[contains(text(), 'G-VDS-ENC')]]/inform")
$inform.ParentNode.RemoveChild($inform) | Out-Null
$outform = $FileOriginal.SelectSingleNode("/Configuration/Enclave[#id = `"$LoadType`"]/device[name[contains(text(), 'G-VDS-ENC')]]/outform")
$outform.ParentNode.RemoveChild($outform) | Out-Null
$RequireCert = $FileOriginal.SelectSingleNode("/Configuration/Enclave[#id = `"$LoadType`"]/device[name[contains(text(), 'G-VDS-ENC')]]/RequireCert")
$RequireCert.ParentNode.RemoveChild($RequireCert) | Out-Null
# Create cert element
$cert = $FileOriginal.CreateElement('cert')
$newinform = $FileOriginal.CreateElement('inform')
$newinform.InnerText = 'PEM'
$newoutform = $FileOriginal.CreateElement('outform')
$newoutform.InnerText = 'PEM'
$type = $FileOriginal.CreateElement('type')
$type.InnerText = 'WebServer'
$pwd = $FileOriginal.CreateElement('pwd')
$pwd.InnerText = 'password'
$altSubject = $FileOriginal.CreateElement('altSubject')
$cert.AppendChild($newinform)
$cert.AppendChild($newoutform)
#$cert.AppendChild($name)
$cert.AppendChild($type)
$cert.AppendChild($pwd)
$cert.AppendChild($altSubject)
# Insert cert element after 'vlan' element
$Pat.InsertAfter( $cert, $Pat.SelectSingleNode('vlan') )
$newRequireCert = $FileOriginal.CreateElement('RequireCert')
$newRequireCert.InnerText = "1"
$Pat.InsertAfter( $newRequireCert, $Pat.SelectSingleNode('cert') )
}
$FileOriginal.Save($FileName)
I couldn't get the "RequireCert" node to appear correctly with a 1 attribute in both the G-VDS-ENC001 & G-VDS-ENC002 nodes. Also, I couldn't come up with any syntax on how to clone or copy both the G-VDS-ENC001 & G-VDS-ENC002 Node elements into the newly created Cert node. Can anyone help me figure out what else is needed or go over my poor PowerShell code.

Answer 1

You can update the existing RequireCert node instead of removing+recreating it:
# Select the node
$RequireCert = $FileOriginal.SelectSingleNode("/Configuration/Enclave[#id = `"$LoadType`"]/device[name[contains(text(), 'G-VDS-ENC')]]/RequireCert")
# Set the node's text value
$RequireCert.'#Text' = 1
Then you can remove the $newRequireCert section in your current code.

Answer 2

I agree with Cpt.Whale you need not remove and recreate the RequireCert node.
Using dot notation you can update these nodes like this:
(($FileOriginal.Configuration.Enclave | Where-Object { $_.id -eq $LoadType }).device |
Where-Object { $_.name -like 'G-VDS-ENC*' }) | ForEach-Object { $_.RequireCert = '1' }