Powershell IO.FileSystemWatcher - folder not updated for last 30 mins

Question

I am looking for help in my Powershell script.

If Directory log location C:\Users\10146187\Downloads\Syslogd does not have any new file created or changed for last 30 minutes, I want to run function "RunMyStuff". Also i do not have Unregister-function. Not sure, where do i put it. Thanks.

Function RunMyStuff {
        # this is the bit I want to happen when there is no file created for 30 mins under C:\Users\10146187\Downloads\Syslogd
     Start-Process 'C:\windows\system32\calc.exe'
     Write-Host $global:FileCreated
    }
    
    Function Watch {    
        $global:FileCreated = $false 
        $folder = "C:\Users\10146187\Downloads\Syslogd"
        $filter = "*.*"
        $watcher = New-Object IO.FileSystemWatcher $folder, $filter -Property @{ 
            IncludeSubdirectories = $false 
            EnableRaisingEvents = $true
        }
    
        Register-ObjectEvent $Watcher "Created" -Action {$global:FileCreated = $true} > $null
         
        Start-Sleep -Seconds 120
        
        while($true){
            while ($global:FileCreated -eq $true){
                 Start-Sleep -Seconds 600
                 Write-Host $global:FileCreated
            }
           
            RunMyStuff
            
            $global:FileCreated = $false
        }
    }
    
    Watch

Answer 1

This might be an example of what you're looking for. It uses a Timer event with a FileWatcher event.

function RunMyStuff()
{
    Write-Host "$(get-date) RunMyStuff (no files added within last 10 seconds)"
    # Start-Process "calc.exe"
}

function Watch ($folder) {
    Write-Host "Watching $((Get-Item $folder).Fullname)"
    $global:FileCreated = $true

    $filter = "*.*"
    $watcher = New-Object IO.FileSystemWatcher $folder, $filter -Property @{ 
        IncludeSubdirectories = $false
        EnableRaisingEvents = $true
    }
    Register-ObjectEvent -InputObject $watcher -EventName "Created" -SourceIdentifier "myFileWatcher" -Action { 
        $global:timer.Stop()
        $global:FileCreated = $true
        $global:timer.Start()
    } > $null

    $global:timer = New-Object Timers.Timer
    $global:timer.Interval = 10000
    Register-ObjectEvent -InputObject $global:timer -EventName "Elapsed" -SourceIdentifier "myTimer" -Action {
        $global:FileCreated = $false
    } > $null

    $global:timer.Start()

    try {
        while ($true) {
            Start-Sleep -Seconds 1
            if (!$global:FileCreated) {
                RunMyStuff
                $global:FileCreated = $true
            }
        }
    }
    finally {
        Unregister-Event -SourceIdentifier "myFileWatcher"
        Unregister-Event -SourceIdentifier "myTimer"
    }
}

Watch "C:\"

Here it is in action: