Public/ConvertTo-RegularExpression.ps1
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function ConvertTo-RegularExpression { <# .SYNOPSIS Convert a string to a regular expression .DESCRIPTION Parse a string and convert it to a regular expression by replacing wildcards and escaping restricted characters .PARAMETER String The string parameter corresponds to the string to convert. .NOTES File name: ConvertTo-RegularExpression.ps1 Author: Florian Carrier Creation date: 2021-07-07 Last modified: 2021-07-07 .LINK https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_regular_expressions #> [CmdletBinding ()] Param ( [Parameter ( Position = 1, Mandatory = $true, HelpMessage = "String(s) to convert" )] [ValidateNotNullOrEmpty ()] [Alias ( "Strings", "Value" )] [System.String[]] $String ) Begin { # Get global preference vrariables Get-CallerPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState # List wildcards and their equivalent $Wildcards = [Ordered]@{ "*" = ".*" "?" = "." } } Process { $RegEx = New-Object -TypeName "System.Collections.ArrayList" foreach ($Value in $String) { $EscapedValue = [RegEx]::Escape($Value) foreach ($Wildcard in $Wildcards.GetEnumerator()) { $EscapedWildcard = [System.String]::Concat("\", $Wildcard.Name) $EscapedValue = $EscapedValue.Replace($EscapedWildcard, $Wildcard.Value) } [Void]$RegEx.Add($EscapedValue) } return $RegEx } } |