Invoke-Countdown

Invoke-Countdown.ps1

function Invoke-Countdown {
  param(
    [Parameter(HelpMessage = "The number of seconds to wait before sleeping", ParameterSetName = "Seconds")]
    [int] $Seconds = 90,
    [Parameter(HelpMessage = "The number of minutes to wait before sleeping", ParameterSetName = "Minutes")]
    [int] $Minutes = 5,
    [Parameter(HelpMessage = "The activity to display in the progress bar")]
    [string]
    $Activity = "Counting down..."
  )
  begin {
    if ($PSCmdlet.ParameterSetName -eq "Minutes") {
      $Seconds = $Minutes * 60
    }

  }
  process {
    $originalSeconds = $Seconds
    $totalSeconds = $originalSeconds
    while ($totalSeconds -gt 0) {
      Start-Sleep -Seconds 1
      $totalSeconds--
      $timeRemaining = "{0}:{1}" -f (($totalSeconds / 60) -ge 1 ? [System.Math]::Round(($totalSeconds / 60), 0, [MidpointRounding]::ToZero) : 0), ($totalSeconds % 60)
      $percentComplete = 100 - (($totalSeconds / $originalSeconds)) * 100
      Write-Debug "Percent complete: $percentComplete"
      $percentString = [Math]::Round($percentComplete, 0)
      Write-Progress -Activity "$Activity ($percentString%)" -Status "Time remaining: $timeRemaining" -PercentComplete $([math]::Round($percentComplete, 0, [MidpointRounding]::ToEven)) -SecondsRemaining $totalSeconds
    }
  }
  end {
    Write-Progress -Activity $Activity -Completed
  }
}