Loop while week day + Business hours - powershell

Question

I am writing a script where it will only run during M-F 8AM-5PM. The problem is after it falls off either 8-5 or M-F while() loop it just... doesn't know how to get back into the loop. This makes me think that I may be approaching my script at the wrong angle. Maybe there's a better way of doing this.
The "do something" part is it's comparing file size between the same file at 5 minutes apart. This is for checking if the file is growing/shrinking or not.
# Declare current date/time
$Weekday = [int](Get-Date).DayOfWeek
$hour = [int](Get-Date -Format HH)
while (1 -eq 1) { # always true
$Weekday = [int](Get-Date).DayOfWeek
$hour = [int](Get-Date -Format HH)
while ($Weekday -ge 1 -and $Weekday -le 5) { # weekday
$Weekday = [int](get-date).DayOfWeek # loop check for current day
while ($hour -ge 8 -and $hour -le 16) { # 8AM-5PM
$hour = [int](get-date -format HH) # loop check for current hour
# Do Something
}
else {
# Sleep until next business hour
$date = Get-Date
$date = $date.AddDays(1)
$mmddyyy = $date.ToString("MM/dd/yyy")
$nextDy = New-TimeSpan -End "$mmddyyy 08:00"
Write-Host "Start sleep timer until next 8AM"
Start-Sleep -Seconds $nextDy.TotalSeconds
}
}
else {
# Sleep until next business day
$date = Get-Date
while ($Date.DayOfWeek -ne "Monday") {$date = $date.AddDays(1)}
$mmddyyy = $date.ToString("MM/dd/yyy")
$nextBu = New-TimeSpan -End "$mmddyyy 08:00"
Write-Host "Start sleep timer until next Monday 8AM"
Start-Sleep -Seconds $nextBu.TotalSeconds
}
}

Answer 1

Try using scheduled task or service.
If you want to use a PowerShell script try using this:
while ($true)
{
#WeekDay
$Weekday = [int](Get-Date).DayOfWeek #loop check for current day
$hour = [int](Get-Date -Format HH)
if ($Weekday -le 5 -and $Weekday -ge 1)
{
while ($hour -ge 8 -and $hour -le 16)
{
#8AM-5PM
$hour = [int](Get-Date -Format HH) #loop check for current hour
#Do Something
}
}
$date = Get-Date
$date = $date.AddDays(1)
$mmddyyy = $date.ToString("MM/dd/yyy")
$nextDy = New-TimeSpan -End "$mmddyyy 08:00"
Write-Host "Start sleep timer until next 8AM"
Start-Sleep -Seconds $nextDy.TotalSeconds
}

Answer 2

I think you got it totally wrong.
Better you use a simple library function like TestFileSizeUtil to monitor file size or use WMI like shown here:
$query = "Select * from __InstanceModificationEvent WITHIN 5 WHERE TargetInstance ISA 'CIM_DataFile' AND TargetInstance.Name='C:\\Logs\\test.log'"
Register-WmiEvent -Query $query -Action {
Write-Host "Current file size is: " $Event.SourceEventArgs.NewEvent.TargetInstance.FileSize
$prevSize = $Event.SourceEventArgs.NewEvent.PreviousInstance.FileSize
$curSize = $Event.SourceEventArgs.NewEvent.TargetInstance.FileSize
if ($curSize -gt $prevSize) {
$bytes = $curSize - $prevSize
Write-Host "File grew by: $bytes bytes"
} else {
$bytes = $prevSize - $curSize
Write-Host "File reduced by: $bytes bytes"
}
}
Then, it should not matter if your script runs all day long.