Public/Get-DokuPageVersionData.ps1

function Get-DokuPageVersionData {
<#
    .SYNOPSIS
        Returns the raw Wiki text for a specific version of a page

    .DESCRIPTION
        Returns the raw Wiki text for a specific version of a page

    .PARAMETER FullName
        The full page name for which to return the data, including any namespaces

    .PARAMETER VersionTimestamp
        The timestamp for which version to get the info from

    .PARAMETER Raw
        Return only the raw data, rather than an object

    .EXAMPLE
        PS C:\> $PageData = Get-DokuPageVersionData -FullName "namespace:namespace:page" -VersionTimestamp 1497464418

    .OUTPUTS
        System.Management.Automation.PSObject

    .NOTES
        AndyDLP - 2018-05-26
#>


    [CmdletBinding()]
    [OutputType([psobject])]
    param
    (
        [Parameter(Mandatory = $true,
                   Position = 1,
                   ValueFromPipeline = $true,
                   ValueFromPipelineByPropertyName = $true,
                   HelpMessage = 'The full page name for which to return the data')]
        [ValidateNotNullOrEmpty()]
        [string[]]$FullName,
        [Parameter(Mandatory = $true,
                   Position = 2,
                   ValueFromPipeline = $true,
                   ValueFromPipelineByPropertyName = $true,
                   HelpMessage = 'The timestamp for which version to get the info from')]
        [ValidateNotNullOrEmpty()]
        [int]$VersionTimestamp,
        [Parameter(Position = 3,
                   HelpMessage = 'Return only the raw Data, rather than an object')]
        [switch]$Raw
    )

    begin {}

    process {
        foreach ($PageName in $FullName) {
            $APIResponse = Invoke-DokuApiCall -MethodName 'wiki.getPageVersion' -MethodParameters @($PageName,$VersionTimestamp)
            if ($APIResponse.CompletedSuccessfully -eq $true) {
                if ($Raw) {
                    $RawText = [string]($APIResponse.XMLPayloadResponse  | Select-Xml -XPath "//value/string").Node.InnerText
                    $RawText
                } else {
                    $PageObject = New-Object PSObject -Property @{
                        FullName = $PageName
                        VersionTimestamp = $VersionTimestamp
                        RawText = [string]($APIResponse.XMLPayloadResponse  | Select-Xml -XPath "//value/string").Node.InnerText
                        PageName = ($PageName -split ":")[-1]
                        ParentNamespace = ($PageName -split ":")[-2]
                        RootNamespace = ($PageName -split ":")[0]
                    }
                    $PageObject
                }
            } elseif ($null -eq $APIResponse.ExceptionMessage) {
                Write-Error "Fault code: $($APIResponse.FaultCode) - Fault string: $($APIResponse.FaultString)"
            } else {
                Write-Error "Exception: $($APIResponse.ExceptionMessage)"
            }
        }
    } # process

    end {}
}