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# -Version Requires 2.0 <# .SYNOPSIS A brief description of the Check-NTMetaCharacters function. .DESCRIPTION A detailed description of the Check-NTMetaCharacters function. .PARAMETER SubjectItem This is the string to escape .PARAMETER Escape This escapes the string referenced. .PARAMETER Remove this removes the detected metacharacters .PARAMETER EscapeCharacter Used to specify what to use as the escape character .EXAMPLE The follo0wing command escapes the charicters with in the string as to continue the use with in the sting without being evaluated. PS C:\> Check-NTMetaCharacters -SubjectItem 'Value1[1234]' -Escape .OUTPUTS System.PSObject .NOTES Created by Nigel Tatschner 2015, tatux.co.uk. #> function Check-NTMetaCharacters { [CmdletBinding(DefaultParameterSetName = 'Default')] [OutputType([PSObject], ParameterSetName = 'Default')] [OutputType([PSObject], ParameterSetName = 'Escape')] [OutputType([PSObject], ParameterSetName = 'Remove')] [OutputType([psobject])] param ( [Parameter(ParameterSetName = 'Escape', Mandatory = $true, ValueFromPipeline = $true, ValueFromRemainingArguments = $true, Position = 0, HelpMessage = 'Pass a sting to validate')] [Parameter(ParameterSetName = 'Remove')] [Parameter(ParameterSetName = 'Default')] [ValidateNotNullOrEmpty()] [Alias('si')] [System.String] $SubjectItem, [Parameter(ParameterSetName = 'Escape')] [Parameter(ParameterSetName = 'Default')] [Alias('e')] [switch] $Escape, [Parameter(ParameterSetName = 'Remove')] [Parameter(ParameterSetName = 'Default')] [Alias('r')] [switch] $Remove, [Parameter(ParameterSetName = 'Escape', HelpMessage = 'Choose between "\" or "`" as the escape character')] [ValidateSet('`', '\')] [Alias('ec')] [System.String] $EscapeCharacter = '`' ) begin { if ($SubjectItem -match "[\$\[\]\^\(\)\+]") { $Match = $true } else { $Match = $false } } process { IF ($Escape -eq $true -and $Match -eq $true) { $SubjectItem = $SubjectItem -replace "\$", "$EscapeCharacter$" $SubjectItem = $SubjectItem -replace "\[", "$EscapeCharacter[" $SubjectItem = $SubjectItem -replace "\]", "$EscapeCharacter]" $SubjectItem = $SubjectItem -replace "\^", "$EscapeCharacter^" $SubjectItem = $SubjectItem -replace "\(", "$EscapeCharacter(" $SubjectItem = $SubjectItem -replace "\)", "$EscapeCharacter)" $SubjectItem = $SubjectItem -replace "\+", "$EscapeCharacter+" $Obj = New-Object -TypeName PSObject $Obj | Add-Member -MemberType 'NoteProperty' -Name "SubjectOutput" -Value $SubjectItem $Obj | Add-Member -MemberType 'NoteProperty' -Name "Validated" -Value $Match Write-Output $Obj return } IF ($Remove -eq $true -and $Match -eq $true) { $SubjectItem = $SubjectItem -replace "\$", "" $SubjectItem = $SubjectItem -replace "\[", "" $SubjectItem = $SubjectItem -replace "\]", "" $SubjectItem = $SubjectItem -replace "\^", "" $SubjectItem = $SubjectItem -replace "\(", "" $SubjectItem = $SubjectItem -replace "\)", "" $SubjectItem = $SubjectItem -replace "\+", "" $Obj = New-Object -TypeName PSObject $Obj | Add-Member -MemberType 'NoteProperty' -Name "SubjectOutput" -Value $SubjectItem $Obj | Add-Member -MemberType 'NoteProperty' -Name "Validated" -Value $Match Write-Output $Obj return } IF ($SubjectItem -gt $Null -and $Match -eq $true) { $Obj = New-Object -TypeName PSObject $Obj | Add-Member -MemberType 'NoteProperty' -Name "SubjectOutput" -Value $SubjectItem $Obj | Add-Member -MemberType 'NoteProperty' -Name "Validated" -Value $Match Write-Output $Obj return } if ($Match -eq $false) { $Obj = New-Object -TypeName PSObject $Obj | Add-Member -MemberType 'NoteProperty' -Name "SubjectOutput" -Value $SubjectItem $Obj | Add-Member -MemberType 'NoteProperty' -Name "Validated" -Value $Match Write-Output $Obj return } } end { } } |