Using FileSystemWatcher to alert if multiple files change simulatenously - powershell

Question

I am very new to powershell. The following code is created by BigTeddy and he gets the full credit (I also made some Changes using the While Loop)
I want to know how can I create an if/else statement such that if more than one file is changed/edited/created/deleted at the same time (say ten files have been edited simultaneously) a log file will be created saying these list files has been edited simultaneously at this particular time.
The following powershell script BigTeddy created basically spits out a log file (and on the output of the powershell ISE) of when a change/edit/creation/deletion has been made, the time it was changed and what file(s) was edited.
param(
[string]$folderToWatch = "C:\Users\gordon\Desktop\powershellStart"
, [string]$filter = "*.*"
, [string]$logFile = 'C:\Users\gordon\Desktop\powershellDest\filewatcher.log'
)
# In the following line, you can change 'IncludeSubdirectories to $true if required.
$fsw = New-Object IO.FileSystemWatcher $folderToWatch, $filter -Property #{IncludeSubdirectories = $false;NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'}
$timeStamp #My changes
$timeStampPrev = $timeStamp #My changes
# This script block is used/called by all 3 events and:
# appends the event to a log file, as well as reporting the event back to the console
$scriptBlock = {
# REPLACE THIS SECTION WITH YOUR PROCESSING CODE
$logFile = $event.MessageData # message data is how we pass in an argument to the event script block
$name = $Event.SourceEventArgs.Name
$changeType = $Event.SourceEventArgs.ChangeType
$timeStamp = $Event.TimeGenerated
while($timeStampPrev -eq $timeStamp) { #My changes
Write-Host "$timeStamp|$changeType|'$name'" -fore green
Out-File -FilePath $logFile -Append -InputObject "$timeStamp|$changeType|'$name'"
# REPLACE THIS SECTION WITH YOUR PROCESSING CODE
}
}
# Here, all three events are registered. You need only subscribe to events that you need:
Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -MessageData $logFile -Action $scriptBlock
Register-ObjectEvent $fsw Deleted -SourceIdentifier FileDeleted -MessageData $logFile -Action $scriptBlock
Register-ObjectEvent $fsw Changed -SourceIdentifier FileChanged -MessageData $logFile -Action $scriptBlock
# To stop the monitoring, run the following commands:
# Unregister-Event FileDeleted ; Unregister-Event FileCreated ; Unregister-Event FileChanged
#This script uses the .NET FileSystemWatcher class to monitor file events in folder(s).
#The advantage of this method over using WMI eventing is that this can monitor sub-folders.
#The -Action parameter can contain any valid Powershell commands.
#The script can be set to a wildcard filter, and IncludeSubdirectories can be changed to $true.
#You need not subscribe to all three types of event. All three are shown for example.

Answer 1

Have you considered a hash table with timestamps and action(create/modify/delete) as keys and file name as value. You iterate through the dictionary after a specific wait interval and you flush the entries in the dictionary to a log file.