Functions/Get-HetznerCloudImage.ps1

function Get-HetznerCloudImage {
    [CmdletBinding(DefaultParameterSetName='None')]
    param(
        [Parameter(ParameterSetName='ByName')]
        [ValidateNotNullOrEmpty()]
        [string]
        $Name
        ,
        [Parameter(ParameterSetName='ById')]
        [ValidateNotNullOrEmpty()]
        [string]
        $Id
    )

    if ($PSCmdlet.ParameterSetName -ieq 'ByName') {
        Get-HetznerCloudImage | Where-Object { $_.Name -ieq $Name }

    } else {
        Invoke-HetznerCloudApi -Api 'images' @PSBoundParameters | ForEach-Object {
            [pscustomobject]@{
                Id = $_.id
                Type = $_.type
                Status = $_.status
                Name = $_.name
                Description = $_.description
                Created = $_.created
                OS = $_.os_flavor
                Version = $_.os_version
                PSTypeName = 'HetznerCloudImage'
            }
        }
    }
}