Public/Intrinsic Functions/Add-FnFindInMap.ps1
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function Add-FnFindInMap { <# .SYNOPSIS Adds the intrinsic function "Fn::FindInMap" to a resource property .DESCRIPTION The intrinsic function Fn::FindInMap returns the value corresponding to keys in a two-level map that is declared in the Mappings section. .LINK http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-findinmap.html .PARAMETER MapName The logical name of a mapping declared in the Mappings section that contains the keys and values. The value can be another function. .PARAMETER TopLevelKey The top-level key name. Its value is a list of key-value pairs. The value can be another function. .PARAMETER SecondLevelKey The second-level key name, which is set to one of the keys from the list assigned to TopLevelKey. The value can be another function. .EXAMPLE Add-FnFindInMap -MapName "RegionMap" -TopLevelKey (Add-FnRef -Ref "$_AWSRegion") -SecondLevelKey "32" When the template is exported, this will convert to: {"Fn::FindInMap":["RegionMap",{"Ref":"AWS::Region"},"32"]} .NOTES You can use the following functions in a Fn::FindInMap function: Fn::FindInMap Ref .FUNCTIONALITY Vaporshell #> [OutputType('Vaporshell.Function.FindInMap')] [cmdletbinding()] Param ( [parameter(Mandatory = $true,Position = 0)] [ValidateScript({ $allowedTypes = "Vaporshell.Function.FindInMap","Vaporshell.Function.Ref","System.String" if ([string]$($_.PSTypeNames) -match "($(($allowedTypes|ForEach-Object{[RegEx]::Escape($_)}) -join '|'))") { $true } else { throw "The MapName parameter only accepts the following types: $($allowedTypes -join ", "). The current types of the value are: $($_.PSTypeNames -join ", ")." } })] $MapName, [parameter(Mandatory = $true,Position = 1)] [ValidateScript({ $allowedTypes = "Vaporshell.Function.FindInMap","Vaporshell.Function.Ref","System.String" if ([string]$($_.PSTypeNames) -match "($(($allowedTypes|ForEach-Object{[RegEx]::Escape($_)}) -join '|'))") { $true } else { throw "The TopLevelKey parameter only accepts the following types: $($allowedTypes -join ", "). The current types of the value are: $($_.PSTypeNames -join ", ")." } })] $TopLevelKey, [parameter(Mandatory = $true,Position = 2)] [ValidateScript({ $allowedTypes = "Vaporshell.Function.FindInMap","Vaporshell.Function.Ref","System.String" if ([string]$($_.PSTypeNames) -match "($(($allowedTypes|ForEach-Object{[RegEx]::Escape($_)}) -join '|'))") { $true } else { throw "The SecondLevelKey parameter only accepts the following types: $($allowedTypes -join ", "). The current types of the value are: $($_.PSTypeNames -join ", ")." } })] $SecondLevelKey ) $obj = [PSCustomObject][Ordered]@{ "Fn::FindInMap" = @($MapName,$TopLevelKey,$SecondLevelKey) } $obj | Add-ObjectDetail -TypeName 'Vaporshell.Function','Vaporshell.Function.FindInMap' Write-Verbose "Resulting JSON from $($MyInvocation.MyCommand): `n`n`t$($obj | ConvertTo-Json -Depth 5 -Compress)`n" } |