Sources/Validators/Empty.ps1
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using namespace System.Collections using namespace System.Collections.Generic <# .SYNOPSIS Creates a new validator that ensures the validated value is empty. .OUTPUTS The newly created validator. #> function New-ValidatorEmpty { [CmdletBinding()] [OutputType([Belin.Validation.Validator])] param ( # The error message describing the validation failure. [Parameter(Mandatory, Position = 1)] [string] $Reason ) New-Validator $Reason { if ($_ -is [string]) { return [string]::IsNullOrWhiteSpace($_) } if ($_ -is [ICollection]) { return $_.Count -eq 0 } if ($_ -is [IEnumerable]) { return -not $_.GetEnumerator().MoveNext() } -not [bool] $_ } } <# .SYNOPSIS Creates a new validator that ensures the validated value is not empty. .OUTPUTS The newly created validator. #> function New-ValidatorNotEmpty { [CmdletBinding()] [OutputType([Belin.Validation.Validator])] param ( # The error message describing the validation failure. [Parameter(Mandatory, Position = 1)] [string] $Reason ) New-Validator $Reason { if ($_ -is [string]) { return -not [string]::IsNullOrWhiteSpace($_) } if ($_ -is [ICollection]) { return $_.Count -gt 0 } if ($_ -is [IEnumerable]) { return $_.GetEnumerator().MoveNext() } [bool] $_ } } |