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## Microsoft Function Naming Convention: http://msdn.microsoft.com/en-us/library/ms714428(v=vs.85).aspx
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#region Function Split-ObjectList
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Function Split-ObjectList
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{
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<#
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.SYNOPSIS
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Provides the functionality to split a list of objects into chunks based on the specified mode.
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.DESCRIPTION
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This is the more performant method of breaking an object into chunks for various use cases.
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.PARAMETER ByPercentage
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Places the function into "ByPercentage" mode. This will split the list of objects based on the provided percentage list.
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.PARAMETER PercentageList
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The list of percentages to split the list of objects by.
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.PARAMETER InputObjectList
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A valid list of objects that will be used for splitting.
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.PARAMETER ContinueOnError
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Ignore errors.
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.EXAMPLE
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$SplitObjectListResult = Split-ObjectList -ByPercentage -PercentageList @(5, 10, 15, 20, 25, 25) -InputObjectList (1..200000) -Verbose
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Write-Output -InputObject ($SplitObjectListResult)
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.EXAMPLE
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$SplitObjectListParameters = New-Object -TypeName 'System.Collections.Specialized.OrderedDictionary'
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$SplitObjectListParameters.ByPercentage = $True
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$SplitObjectListParameters.PercentageList = New-Object -TypeName 'System.Collections.Generic.List[UInt32]'
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$SplitObjectListParameters.PercentageList.Add(5)
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$SplitObjectListParameters.PercentageList.Add(10)
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$SplitObjectListParameters.PercentageList.Add(15)
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$SplitObjectListParameters.PercentageList.Add(20)
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$SplitObjectListParameters.PercentageList.Add(25)
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$SplitObjectListParameters.PercentageList.Add(25)
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$SplitObjectListParameters.InputObjectList = 1..200000
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$SplitObjectListParameters.Verbose = $True
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$SplitObjectListParameters.ContinueOnError = $False
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$SplitObjectListResult = Split-ObjectList @SplitObjectListParameters
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Write-Output -InputObject ($SplitObjectListResult)
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.NOTES
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Most of the time, various "List" type objects are used with index removal and so forth, which can work, but is not the most performant.
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.LINK
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https://stackoverflow.com/questions/56990719/split-array-by-percentage
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.LINK
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https://www.infoworld.com/article/3666499/how-to-work-with-a-priority-queue-in-net-6.html
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#>
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[CmdletBinding(ConfirmImpact = 'Low', DefaultParameterSetName = 'ByPercentage')]
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[OutputType([System.Management.Automation.PSObject[]])]
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Param
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(
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[Parameter(Mandatory=$True, ParameterSetName = 'ByPercentage')]
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[ValidateNotNullOrEmpty()]
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[Switch]$ByPercentage,
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[Parameter(Mandatory=$True, ParameterSetName = 'ByPercentage')]
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[ValidateNotNullOrEmpty()]
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[System.UInt32[]]$PercentageList,
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[Parameter(Mandatory=$True)]
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[ValidateNotNullOrEmpty()]
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[System.Object[]]$InputObjectList,
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[Parameter(Mandatory=$False)]
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[Switch]$ContinueOnError
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)
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Begin
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{
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Try
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{
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$DateTimeLogFormat = 'dddd, MMMM dd, yyyy @ hh:mm:ss.FFF tt' ###Monday, January 01, 2019 @ 10:15:34.000 AM###
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[ScriptBlock]$GetCurrentDateTimeLogFormat = {(Get-Date).ToString($DateTimeLogFormat)}
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$DateTimeMessageFormat = 'MM/dd/yyyy HH:mm:ss.FFF' ###03/23/2022 11:12:48.347###
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[ScriptBlock]$GetCurrentDateTimeMessageFormat = {(Get-Date).ToString($DateTimeMessageFormat)}
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$DateFileFormat = 'yyyyMMdd' ###20190403###
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[ScriptBlock]$GetCurrentDateFileFormat = {(Get-Date).ToString($DateFileFormat)}
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$DateTimeFileFormat = 'yyyyMMdd_HHmmss' ###20190403_115354###
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[ScriptBlock]$GetCurrentDateTimeFileFormat = {(Get-Date).ToString($DateTimeFileFormat)}
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$TextInfo = (Get-Culture).TextInfo
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$LoggingDetails = New-Object -TypeName 'System.Collections.Specialized.OrderedDictionary'
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$LoggingDetails.Add('LogMessage', $Null)
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$LoggingDetails.Add('WarningMessage', $Null)
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$LoggingDetails.Add('ErrorMessage', $Null)
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$CommonParameterList = New-Object -TypeName 'System.Collections.Generic.List[String]'
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$CommonParameterList.AddRange([System.Management.Automation.PSCmdlet]::CommonParameters)
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$CommonParameterList.AddRange([System.Management.Automation.PSCmdlet]::OptionalCommonParameters)
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[ScriptBlock]$ErrorHandlingDefinition = {
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Param
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(
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[Int16]$Severity,
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[Boolean]$ContinueOnError
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)
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$ExceptionPropertyDictionary = New-Object -TypeName 'System.Collections.Specialized.OrderedDictionary'
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$ExceptionPropertyDictionary.Add('Message', $_.Exception.Message)
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$ExceptionPropertyDictionary.Add('Category', $_.Exception.ErrorRecord.FullyQualifiedErrorID)
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#$ExceptionPropertyDictionary.Add('ExitCode', $Script:LASTEXITCODE)
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#$ExceptionPropertyDictionary.Add('Script', $_.InvocationInfo.ScriptName)
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$ExceptionPropertyDictionary.Add('LineNumber', $_.InvocationInfo.ScriptLineNumber)
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$ExceptionPropertyDictionary.Add('LinePosition', $_.InvocationInfo.OffsetInLine)
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$ExceptionPropertyDictionary.Add('Code', $_.InvocationInfo.Line.Trim())
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$ExceptionMessageList = New-Object -TypeName 'System.Collections.Generic.List[String]'
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ForEach ($ExceptionProperty In $ExceptionPropertyDictionary.GetEnumerator())
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{
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$ExceptionMessageList.Add("[$($ExceptionProperty.Key): $($ExceptionProperty.Value)]")
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}
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$LogMessageParameters = New-Object -TypeName 'System.Collections.Specialized.OrderedDictionary'
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$LogMessageParameters.Message = $ExceptionMessageList -Join ' '
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$LogMessageParameters.Verbose = $True
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Switch ($Severity)
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{
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{($_ -in @(1))} {Write-Verbose @LogMessageParameters}
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{($_ -in @(2))} {Write-Warning @LogMessageParameters}
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{($_ -in @(3))} {Write-Error @LogMessageParameters}
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}
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Switch ($ContinueOnError)
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{
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{($_ -eq $False)}
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{
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Throw
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}
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}
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}
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#Determine the date and time we executed the function
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$FunctionStartTime = (Get-Date)
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[String]$FunctionName = $MyInvocation.MyCommand
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[System.IO.FileInfo]$InvokingScriptPath = $MyInvocation.PSCommandPath
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[System.IO.DirectoryInfo]$InvokingScriptDirectory = $InvokingScriptPath.Directory.FullName
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[System.IO.FileInfo]$FunctionPath = "$($InvokingScriptDirectory.FullName)\Functions\$($FunctionName).ps1"
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[System.IO.DirectoryInfo]$FunctionDirectory = "$($FunctionPath.Directory.FullName)"
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Function `'$($FunctionName)`' is beginning. Please Wait..."
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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#Define Default Action Preferences
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$ErrorActionPreference = 'Stop'
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[String[]]$AvailableScriptParameters = (Get-Command -Name ($FunctionName)).Parameters.GetEnumerator() | Where-Object {($_.Value.Name -inotin $CommonParameterList)} | ForEach-Object {"-$($_.Value.Name):$($_.Value.ParameterType.Name)"}
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Available Function Parameter(s) = $($AvailableScriptParameters -Join ', ')"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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[String[]]$SuppliedScriptParameters = $PSBoundParameters.GetEnumerator() | ForEach-Object {Try {"-$($_.Key):$($_.Value.GetType().Name)"} Catch {"-$($_.Key):Unknown"}}
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Supplied Function Parameter(s) = $($SuppliedScriptParameters -Join ', ')"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Execution of $($FunctionName) began on $($FunctionStartTime.ToString($DateTimeLogFormat))"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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[String]$ParameterSetName = $PSCmdlet.ParameterSetName
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Parameter Set Name: $($ParameterSetName)"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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#Create an object that will contain the functions output.
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$OutputObjectList = New-Object -TypeName 'System.Collections.Generic.List[System.Management.Automation.PSObject]'
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}
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Catch
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{
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$ErrorHandlingDefinition.Invoke(2, $ContinueOnError.IsPresent)
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}
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Finally
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{
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}
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}
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Process
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{
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Try
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{
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Switch ($ParameterSetName)
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{
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{($_ -iin @('ByPercentage'))}
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{
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[UInt32]$RequiredPercentageListTotal = 100
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[UInt32]$PercentageListTotal = ($PercentageList | Measure-Object -Sum).Sum
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Switch ($PercentageListTotal -ne $RequiredPercentageListTotal)
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{
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{($_ -eq $True)}
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{
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$LoggingDetails.WarningMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - The percentage list must equal $($RequiredPercentageListTotal)."
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Write-Warning -Message ($LoggingDetails.WarningMessage) -Verbose
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Return
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}
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}
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$InputObjectQueue = New-Object -TypeName 'System.Collections.Generic.Queue[System.Object]'
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$InputObjectList | ForEach-Object {($InputObjectQueue.Enqueue($_))}
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$InputObjectListCount = ($InputObjectList | Measure-Object).Count
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Input Object List Count: $($InputObjectListCount)"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$PercentageListCounter = 1
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$PercentageListCount = ($PercentageList | Measure-Object).Count
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For ($PercentageListIndex = 0; $PercentageListIndex -lt $PercentageListCount; $PercentageListIndex++)
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{
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$Percentage = $PercentageList[$PercentageListIndex]
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Attempting to process percentage list entry $($PercentageListCounter) of $($PercentageListCount). Please Wait..."
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Percentage: $($Percentage)%"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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Switch ($InputObjectQueue.Count -gt 0)
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{
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{($_ -eq $True)}
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{
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$InputObjectPercentageFormula = {[System.Math]::Round((($InputObjectListCount * $Percentage) / 100), 0)}
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$InputObjectPercentageCalculation = $InputObjectPercentageFormula.InvokeReturnAsIs()
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Percentage Calculation: $($InputObjectPercentageCalculation)"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$OutputObjectProperties = New-Object -TypeName 'System.Collections.Specialized.OrderedDictionary'
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$OutputObjectProperties.Wave = $PercentageListCounter
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$OutputObjectProperties.Count = 0
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$OutputObjectProperties.Members = New-object -TypeName 'System.Collections.Generic.List[System.Object]'
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Attempting to process wave $($OutputObjectProperties.Wave). Please Wait..."
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Attempting to add $($InputObjectPercentageCalculation) member(s) to wave $($OutputObjectProperties.Wave). Please Wait..."
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$InputObjectCounter = 1
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For ($InputObjectCounter = 1; $InputObjectCounter -le $InputObjectPercentageCalculation; $InputObjectCounter++)
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{
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$InputObject = $InputObjectQueue.Dequeue()
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$OutputObjectProperties.Members.Add($InputObject)
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}
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$OutputObjectProperties.Members = $OutputObjectProperties.Members.ToArray()
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$OutputObjectProperties.Count = $OutputObjectProperties.Members.Count
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$OutputObject = New-Object -TypeName 'System.Management.Automation.PSObject' -Property ($OutputObjectProperties)
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$OutputObjectList.Add($OutputObject)
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Successfully completed the processing of wave $($OutputObjectProperties.Wave)."
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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}
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}
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - There are now $($InputObjectQueue.Count) objects remaining in the queue."
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$PercentageListCounter++
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}
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}
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}
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}
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Catch
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{
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$ErrorHandlingDefinition.Invoke(2, $ContinueOnError.IsPresent)
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}
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Finally
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{
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}
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}
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End
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{
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Try
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{
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#Determine the date and time the function completed execution
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$FunctionEndTime = (Get-Date)
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Execution of $($FunctionName) ended on $($FunctionEndTime.ToString($DateTimeLogFormat))"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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#Log the total script execution time
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$FunctionExecutionTimespan = New-TimeSpan -Start ($FunctionStartTime) -End ($FunctionEndTime)
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Function execution took $($FunctionExecutionTimespan.Hours.ToString()) hour(s), $($FunctionExecutionTimespan.Minutes.ToString()) minute(s), $($FunctionExecutionTimespan.Seconds.ToString()) second(s), and $($FunctionExecutionTimespan.Milliseconds.ToString()) millisecond(s)"
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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$LoggingDetails.LogMessage = "$($GetCurrentDateTimeMessageFormat.Invoke()) - Function `'$($FunctionName)`' is completed."
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Write-Verbose -Message ($LoggingDetails.LogMessage)
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}
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Catch
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{
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$ErrorHandlingDefinition.Invoke(2, $ContinueOnError.IsPresent)
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}
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Finally
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{
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$OutputObjectList = $OutputObjectList.ToArray()
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Write-Output -InputObject ($OutputObjectList)
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}
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}
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}
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#endregion
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