Public/Condition Functions/Add-ConNot.ps1
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function Add-ConNot { <# .SYNOPSIS Adds the condition function "Fn::Not" to a resource property .DESCRIPTION Returns true for a condition that evaluates to false or returns false for a condition that evaluates to true. Fn::Not acts as a NOT operator. .LINK http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-conditions.html#intrinsic-function-reference-conditions-not .PARAMETER Condition A condition such as Fn::Equals that evaluates to true or false. .EXAMPLE Add-ConNot -Condition (Add-ConEquals -FirstValue (Add-FnRef -Ref "EnvironmentType") -SecondValue "prod") # When the template is exported, this will convert to: {"Fn::Equals":["sg-mysggroup",{"Ref":"ASecurityGroup"}]} .NOTES You can use the following functions in this condition statement: Fn::FindInMap Ref Other condition functions .FUNCTIONALITY Vaporshell #> [OutputType('Vaporshell.Condition.Not')] [cmdletbinding()] Param ( [parameter(Mandatory = $true,Position = 0)] [ValidateScript({ $allowedTypes = "Vaporshell.Function.FindInMap","Vaporshell.Function.Ref","Vaporshell.Condition" if ([string]$($_.PSTypeNames) -match "($(($allowedTypes|ForEach-Object{[RegEx]::Escape($_)}) -join '|'))") { $true } else { throw "The MapName parameter only accepts the following types: $($allowedTypes -join ", "). The current types of the value are: $($_.PSTypeNames -join ", ")." } })] $Condition ) $obj = [PSCustomObject][Ordered]@{ "Fn::Not" = @($Condition) } $obj | Add-ObjectDetail -TypeName 'Vaporshell.Condition','Vaporshell.Condition.Not' Write-Verbose "Resulting JSON from $($MyInvocation.MyCommand): `n`n`t$($obj | ConvertTo-Json -Depth 5 -Compress)`n" } |