PSRemotely

1.0.3

private/ConfigurationData.ps1

# TO DO - Rename the below to Assert-ConfigData
Function Test-ConfigData {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory)]
        [HashTable]$ConfigurationData
    )
    
    # Configuration Data should contain 'AllNodes' key
    if ( -not $ConfigurationData.ContainsKey('AllNodes')) {
        Throw 'ConfigurationData parameter need to have property AllNodes.'
    }

    # Configuration Data AllNodes should be an array
    if ($ConfigurationData['AllNodes'] -isnot [Array]) {
        throw 'ConfigurationData parameter property AllNodes needs to be a collection.'
    }

    $NodeNames = New-Object -TypeName 'System.Collections.Generic.HashSet[String]' -ArgumentList  ([System.StringComparer]::CurrentCultureIgnoreCase)
    foreach ($node in $ConfigurationData['AllNodes']) {
        if ($node -isnot [hashtable] -or -not $node['NodeName']) { # each element in the AllNodes need to be a hashtable & nodeName key should be present
            throw "all elements of AllNodes need to be hashtable and has a property 'NodeName'."    
        }

        # Check for the duplicate nodeName Values
        if ($NodeNames.Contains($node['NodeName'])) {
            # Duplicate node in the list
            throw $("There is a duplicate NodeName '{0}' in the configurationData passed in." -f $node['NodeName'])
        }

        $null = $NodeNames.Add($node['NodeName'])
    }
}


Function Update-ConfigData {
    [OutputType([Hashtable])]
    [CmdletBinding()]
    param(
        [Parameter(Mandatory)]
        [Hashtable]$ConfigurationData
    )

    if ($configurationData.AllNodes | Where-Object -Property NodeName -eq '*') {
            $AllNodeSettings = $configurationData.AllNodes | Where-Object -Property NodeName -eq '*'
    }

    # Copy all the settings for the nodes
    If ($AllNodeSettings) {
        foreach ($node in $ConfigurationData['AllNodes']) {

            if ($node['NodeName'] -ne '*') {
                foreach ($nodekey in $AllNodeSettings.Keys) {
                    
                    if (-not $node.ContainsKey($nodeKey)) {
                        $node.Add($nodeKey, $AllNodeSettings[$nodeKey])
                    }
                }
            }
        }
    }

    # Remove the node named *
    $ConfigurationData['AllNodes'] = $ConfigurationData['AllNodes'] | Where-Object -Property 'NodeName' -ne '*'

    # is the below needed, the changes are directly done by reference to the input
    Write-Output -InputObject $ConfigurationData
}

# http://powershell.org/forums/topic/configuration-data-for-dsc-not-in-json/
Function LoadConfigDataFromFile {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory=$True)]
        [String]$Path
    )

    Switch -Exact ([System.IO.Path]::GetExtension($Path)) {
        '.json' {
            $object = ConvertFrom-Json -InputObject $(Get-Content -Raw -Path $Path) 
            $hashTable = ConvertPSObjectToHashtable -InputObject $Object 
            Write-Output -InputObject $hashTable
            break
        }
        '.psd1' {
            Import-LocalizedData -BindingVariable hashTable -BaseDirectory $([System.IO.Path]::GetDirectoryName($Path)) -FileName $([System.IO.Path]::GetFileName($Path)) 
            Write-Output -InputObject $hashTable
        }
        default {
            throw 'specifying only a .json or .psd1 file for configdata supported'            
        }
    }
}

# Credits : Dave Wyatt's function here -> http://powershell.org/forums/topic/configuration-data-for-dsc-not-in-json/
function ConvertPSObjectToHashtable
{
    param (
        [Parameter(ValueFromPipeline)]
        $InputObject
    )

    process
    {
        if ($null -eq $InputObject) { return $null }

        if ($InputObject -is [System.Collections.IEnumerable] -and $InputObject -isnot [string])
        {
            $collection = @(
                foreach ($object in $InputObject) { ConvertPSObjectToHashtable $object }
            )

            Write-Output -NoEnumerate $collection
        }
        elseif ($InputObject -is [psobject])
        {
            $hash = @{}

            foreach ($property in $InputObject.PSObject.Properties)
            {
                $hash[$property.Name] = ConvertPSObjectToHashtable $property.Value
            }

            $hash
        }
        else
        {
            $InputObject
        }
    }
}