Public/Remove-JiraGroup.ps1

function Remove-JiraGroup {
    [CmdletBinding( SupportsShouldProcess, ConfirmImpact = 'High' )]
    param(
        [Parameter( Mandatory, ValueFromPipeline )]
        [ValidateNotNullOrEmpty()]
        [ValidateScript(
            {
                if (("JiraPS.Group" -notin $_.PSObject.TypeNames) -and (($_ -isnot [String]))) {
                    $errorItem = [System.Management.Automation.ErrorRecord]::new(
                        ([System.ArgumentException]"Invalid Type for Parameter"),
                        'ParameterType.NotJiraGroup',
                        [System.Management.Automation.ErrorCategory]::InvalidArgument,
                        $_
                    )
                    $errorItem.ErrorDetails = "Wrong object type provided for Group. Expected [JiraPS.Group] or [String], but was $($_.GetType().Name)"
                    $PSCmdlet.ThrowTerminatingError($errorItem)
                    <#
                      #ToDo:CustomClass
                      Once we have custom classes, this check can be done with Type declaration
                    #>

                }
                else {
                    return $true
                }
            }
        )]
        [Alias('GroupName')]
        [Object[]]
        $Group,

        [PSCredential]
        $Credential,

        [Switch]
        $Force
    )

    begin {
        Write-Verbose "[$($MyInvocation.MyCommand.Name)] Function started"

        $server = Get-JiraConfigServer -ErrorAction Stop

        $resourceURi = "$server/rest/api/latest/group?groupname={0}"

        if ($Force) {
            Write-DebugMessage "[$($MyInvocation.MyCommand.Name)] -Force was passed. Backing up current ConfirmPreference [$ConfirmPreference] and setting to None"
            $oldConfirmPreference = $ConfirmPreference
            $ConfirmPreference = 'None'
        }
    }

    process {
        Write-DebugMessage "[$($MyInvocation.MyCommand.Name)] ParameterSetName: $($PsCmdlet.ParameterSetName)"
        Write-DebugMessage "[$($MyInvocation.MyCommand.Name)] PSBoundParameters: $($PSBoundParameters | Out-String)"

        foreach ($_group in $Group) {
            Write-Verbose "[$($MyInvocation.MyCommand.Name)] Processing [$_group]"
            Write-Debug "[$($MyInvocation.MyCommand.Name)] Processing `$_group [$_group]"

            $groupObj = Get-JiraGroup -GroupName $_group -Credential $Credential -ErrorAction Stop

            $parameter = @{
                URI        = $resourceURi -f $groupObj.Name
                Method     = "DELETE"
                Credential = $Credential
            }
            Write-Debug "[$($MyInvocation.MyCommand.Name)] Invoking JiraMethod with `$parameter"
            if ($PSCmdlet.ShouldProcess($groupObj.Name, "Remove group")) {
                Invoke-JiraMethod @parameter
            }
        }
    }

    end {
        if ($Force) {
            Write-DebugMessage "[$($MyInvocation.MyCommand.Name)] Restoring ConfirmPreference to [$oldConfirmPreference]"
            $ConfirmPreference = $oldConfirmPreference
        }

        Write-Verbose "[$($MyInvocation.MyCommand.Name)] Complete"
    }
}