Progress bar for current "Transferring" BITS Transfers with a time remain calculation.

GetBitsTransferProgress.ps1

param (
    [guid]$jobID
)

#Dynamically choose whether to return one or all based on if a Job ID was provided
function DynamicBitsStatus {
    If ($jobID) {
        return (Get-BitsTransfer -JobId $jobID | Where-Object { $_.JobState -eq "Transferring" })
    } Else {
        return (Get-BitsTransfer | Where-Object { $_.JobState -eq "Transferring" })
    }
}

#Borrowed from https://theposhwolf.com/howtos/Format-Bytes/
Function Format-Bytes {
    Param
    (
        [Parameter(
            ValueFromPipeline = $true
        )]
        [ValidateNotNullOrEmpty()]
        [float]$number
    )
    Begin{
        $sizes = 'KB','MB','GB','TB','PB'
    }
    Process {
        # New for loop
        for($x = 0;$x -lt $sizes.count; $x++){
            if ($number -lt [int64]"1$($sizes[$x])"){
                if ($x -eq 0){
                    return "$number B"
                } else {
                    $num = $number / [int64]"1$($sizes[$x-1])"
                    $num = "{0:N2}" -f $num
                    return "$num $($sizes[$x-1])"
                }
            }
        }
    }
    End{}
}

while (DynamicBitsStatus) {     
    $totalbytes=0;    
    $bytestransferred=0; 
    $timeTaken = 0;    
    foreach ($job in (DynamicBitsStatus | Where-Object { $_.JobState -eq "Transferring" } | Sort-Object CreationTime)) {         
        $totalbytes += $job.BytesTotal;         
        $bytestransferred += $job.bytestransferred     
        if ($timeTaken -eq 0) { 
            #Get the time of the oldest transfer aka the one that started first
            $timeTaken = ((Get-Date) - $job.CreationTime).TotalMinutes 
        }
    }    
    #TimeRemaining = (TotalFileSize - BytesDownloaded) * TimeElapsed/BytesDownloaded
    if ($totalbytes -gt 0) {
        $timeLeft = ($totalBytes - $bytestransferred) * ($timeTaken / $bytestransferred)
        $pctComplete = $(($bytestransferred*100)/$totalbytes);
        $timeUnit = "minute(s)"
        If ($timeLeft -gt 60) {
            $timeLeft = ($timeLeft / 60)
            $timeUnit = "hour(s)"
        }
        If (($timeUnit -eq "hour(s)") -and ($timeLeft -gt 24)) {
            $timeLeft = ($timeLeft / 24)
            $timeUnit = "day(s)"
        }
        $formattedBytesTransferred = (Format-Bytes($bytestransferred))
        $formattedBytesTotal = (Format-Bytes($totalbytes))
        $formattedPctComplete = ("{0:p}" -f ($pctComplete/100))
        $roundedTimeRemaining = [math]::Round($timeLeft,2)
        Write-Progress -Status "Transferring $formattedBytesTransferred of $formattedBytesTotal ($formattedPctComplete). $roundedTimeRemaining $timeUnit remaining." -Activity "Dowloading files" -PercentComplete $pctComplete  
    }
}