XmlEx

0.9.3

Src/Public/Set-XmlExConfigKeyValue.ps1

                                function Set-XmlExConfigKeyValue {

<#

    .SYNOPSIS

        Ensures an Xml document contains a Xml element/attribute.    

#>

    [CmdletBinding(SupportsShouldProcess, DefaultParameterSetName = 'Path')]

    param (

        # Specifies a path to one or more locations. Wildcards are permitted.

        [Parameter(Mandatory, Position = 0, ParameterSetName = 'Path', ValueFromPipeline, ValueFromPipelineByPropertyName)]

        [ValidateNotNullOrEmpty()]

        [SupportsWildcards()]

        [System.String[]] $Path,

        # Specifies a path to one or more locations. Unlike the Path parameter, the value of the LiteralPath parameter is

        # used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters,

        # enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any

        # characters as escape sequences.

        [Parameter(Mandatory, Position = 0, ParameterSetName = 'LiteralPath', ValueFromPipelineByPropertyName)]

        [Alias('PSPath')]

        [ValidateNotNullOrEmpty()]

        [System.String[]] $LiteralPath,

        ## Specifies the XPath location of the parent Xml element within the document to update.

        [Parameter(Mandatory, ValueFromPipelineByPropertyName)]

        [System.String] $XPath,

        ## Specifies the name of the Xml element or Xml attribute to update.

        [Parameter(Mandatory, ValueFromPipelineByPropertyName)]

        [System.String] $Name,

        ## Specifies the value of the Xml element or Xml attribute to update.

        [Parameter(ValueFromPipelineByPropertyName)]

        [System.String] $Value,

        ## Specifies the target is an attribute. Defaults to an element.

        [Parameter(ValueFromPipelineByPropertyName)]

        [System.Management.Automation.SwitchParameter] $IsAttribute,

        ## Specifies the target Xml document file should be created if it does not exist.

        [Parameter(ValueFromPipelineByPropertyName)]

        [System.Management.Automation.SwitchParameter] $Force

    )

    begin {

        [ref] $null = $PSBoundParameters.Remove('Path');

        [ref] $null = $PSBoundParameters.Remove('LiteralPath');

        $paths = @();

    }

    process {

        if ($PSCmdlet.ParameterSetName -eq 'Path') {

            foreach ($filePath in $Path) {

                if (-not $Force) {

                    if (-not (Test-Path -Path $filePath)) {

                        $errorMessage = $localized.CannotFindPathError -f $filePath;

                        $ex = New-Object System.Management.Automation.ItemNotFoundException $errorMessage;

                        $category = [System.Management.Automation.ErrorCategory]::ObjectNotFound;

                        $errorRecord = New-Object System.Management.Automation.ErrorRecord $ex, 'PathNotFound', $category, $filePath;

                        $PSCmdlet.WriteError($errorRecord);

                        continue;

                    }

                    # Resolve any wildcards that might be in the path

                    $provider = $null;

                    $paths += $psCmdlet.SessionState.Path.GetResolvedProviderPathFromPSPath($filePath, [ref] $provider);

                }

                else {

                    $paths += $PSCmdlet.SessionState.Path.GetUnresolvedProviderPathFromPSPath($filePath);

                }

            } #end foreach path

        }

        else {

            foreach ($filePath in $LiteralPath) {

                if (-not $Force) {

                    if (-not (Test-Path -LiteralPath $filePath)) {

                        $errorMessage = $localized.CannotFindPathError -f $filePath;

                        $ex = New-Object System.Management.Automation.ItemNotFoundException $errorMessage;

                        $category = [System.Management.Automation.ErrorCategory]::ObjectNotFound;

                        $errorRecord = New-Object System.Management.Automation.ErrorRecord $ex, 'PathNotFound', $category, $filePath;

                        $PSCmdlet.WriteError($errorRecord);

                        continue;

                    }

                }

                # Resolve any relative paths

                $paths += $PSCmdlet.SessionState.Path.GetUnresolvedProviderPathFromPSPath($filePath);

            } #end foreach literal path

        }

    } #end process

    end {

        foreach ($filePath in $paths) {

            Write-Verbose -Message ($localized.ProcessingDocument -f $filePath);

            $xmlDocument = Assert-XmlExFilePath -Path $filePath -Ensure 'Present';;

            Assert-XmlExXPath -XmlDocument $xmlDocument @PSBoundParameters;

            $verboseMessage = $localized.SavingDocument -f $filePath;

            $warningConfirmationMessage = $localized.ShouldProcessWarning;

            $warningDescriptionMessage = $localized.ShouldProcessOperationWarning -f 'Save', $filePath;

            if ($Force -or ($PSCmdlet.ShouldProcess($verboseMessage, $warningConfirmationMessage, $warningDescriptionMessage))) {

                $xmlDocument.Save($filePath);

            }

        }

    } #end

} #end function

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