BC: Convert-TextConstant to Label

Convert-TextConstantToLabel.ps1

function Convert-LanguageIdentifier
{
    param
    (
        [Parameter(Mandatory, ValueFromPipeline)]
        [ValidatePattern('[A-Z]{3}')]
        [string[]]$ThreeLetterWindowsLanguageName
    )

    $ThreeLetterWindowsLanguageName.ForEach{
        $CurrentLanguage = $_

        switch ($CurrentLanguage)
        {
            'ENU' { return 'en-US' }
            'NLD' { return 'nl-NL' }
            'FRA' { return 'fr-FR' }
            'ESP' { return 'es-ES' }
            default { throw "Unanticipated language: $CurrentLanguage" }
        }
    }
}

<#
.EXAMPLE
Convert-TextConstantToLabel -TextConstant "   Text_SP: TextConst ENU = 'sp.', FRA = 'sp.', NLD = 'sp.';"
#>
function Convert-TextConstantToLabel
{
    param
    (
        [Parameter(Mandatory, ValueFromPipeline)]
        [string[]]$TextConstant,

        [ValidateNotNullOrEmpty()]
        [string]$DeveloperNoteSeparator = '|'
    )

    process
    {
        $TextConstant.ForEach{
            $Name, $ValuesAsText = $_ -split ':',2
            Write-Verbose "Name: '$Name'"
            $ValuesAsText = $ValuesAsText -replace '^\s*TextConst', '' -replace ';$', ''           
            Write-Verbose "ValuesAsText: '$ValuesAsText'"
            $ValuesArray = $ValuesAsText -split ','
            Write-Verbose "ValuesArray:"
            Write-Verbose ($ValuesArray -join "`n")
            $Values = $ValuesArray | ForEach-Object { 
                $Language, $Value = $_ -split '=',2                
                $Result = [PSCustomObject]@{
                    Language = $Language.Trim() | Convert-LanguageIdentifier
                    Value    = $Value.Trim() -replace '^''(.*)''$', '$1'
                } 
                Write-Verbose "$($Result.Language): '$($Result.Value)'"
                $Result
            }

            "$($Name): Label $($Values | Where-Object Language -eq 'en-US' | ForEach-Object { "'$($_.Value)'"}), Comment = '$($Values | Where-Object Language -ne 'en-US' | ForEach-Object { "$($_.Language)=$($_.Value)" } | Join-String -Separator $DeveloperNoteSeparator )';"


            # Text_SP: TextConst ENU = 'sp.', FRA = 'sp.', NLD = 'sp.';            
            # Text_SP: Label 'sp.', Comment = 'fr-FR=sp.|nl-NL=sp.';
        }
    }
}