Retrieve progress from PowerShell job and display progress bar

Show-JobProgress.ps1

function Show-JobProgress {
    [CmdletBinding()]
    param(
        [Parameter(Mandatory,ValueFromPipeline)]
        [ValidateNotNullOrEmpty()]
        [System.Management.Automation.Job[]]
        $Job
        ,
        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [scriptblock]
        $FilterScript
    )

    Process {
        $Job.ChildJobs | ForEach-Object {
            if (-not $_.Progress) {
                return
            }

            $LastProgress = $_.Progress
            if ($FilterScript) {
                $LastProgress = $LastProgress | Where-Object -FilterScript $FilterScript
            }

            $LastProgress | Group-Object -Property Activity,StatusDescription | ForEach-Object {
                $_.Group | Select-Object -Last 1

            } | ForEach-Object {
                $ProgressParams = @{}
                if ($_.Activity          -and $_.Activity          -ne $null) { $ProgressParams.Add('Activity',         $_.Activity) }
                if ($_.StatusDescription -and $_.StatusDescription -ne $null) { $ProgressParams.Add('Status',           $_.StatusDescription) }
                if ($_.CurrentOperation  -and $_.CurrentOperation  -ne $null) { $ProgressParams.Add('CurrentOperation', $_.CurrentOperation) }
                if ($_.ActivityId        -and $_.ActivityId        -gt -1)    { $ProgressParams.Add('Id',               $_.ActivityId) }
                if ($_.ParentActivityId  -and $_.ParentActivityId  -gt -1)    { $ProgressParams.Add('ParentId',         $_.ParentActivityId) }
                if ($_.PercentComplete   -and $_.PercentComplete   -gt -1)    { $ProgressParams.Add('PercentComplete',  $_.PercentComplete) }
                if ($_.SecondsRemaining  -and $_.SecondsRemaining  -gt -1)    { $ProgressParams.Add('SecondsRemaining', $_.SecondsRemaining) }

                Write-Progress @ProgressParams
            }
        }
    }
}