PSEventViewer.psm1

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function Get-Events {
    <#
    .SYNOPSIS
    Get-Events is a wrapper function around Get-WinEvent providing additional features and options.
 
    .DESCRIPTION
    Long description
 
    .PARAMETER Machine
    ComputerName or Server you want to query. Takes an array of servers as well.
     
    .PARAMETER DateFrom
    Parameter description
     
    .PARAMETER DateTo
    Parameter description
     
    .PARAMETER ID
    Parameter description
     
    .PARAMETER ExcludeID
    Parameter description
     
    .PARAMETER LogName
    Parameter description
     
    .PARAMETER ProviderName
    Parameter description
     
    .PARAMETER NamedDataFilter
    Parameter description
     
    .PARAMETER NamedDataExcludeFilter
    Parameter description
     
    .PARAMETER UserID
    Parameter description
     
    .PARAMETER Level
    Parameter description
     
    .PARAMETER UserSID
    Parameter description
     
    .PARAMETER Data
    Parameter description
     
    .PARAMETER MaxEvents
    Parameter description
     
    .PARAMETER Credentials
    Parameter description
     
    .PARAMETER Path
    Parameter description
     
    .PARAMETER Keywords
    Parameter description
     
    .PARAMETER RecordID
    Parameter description
     
    .PARAMETER MaxRunspaces
    Parameter description
     
    .PARAMETER Oldest
    Parameter description
     
    .PARAMETER DisableParallel
    Parameter description
     
    .PARAMETER ExtendedOutput
    Parameter description
     
    .PARAMETER ExtendedInput
    Parameter description
     
    .EXAMPLE
    An example
     
    .NOTES
    General notes
    #>

    
    [CmdLetBinding()]
    param (
        [alias ("ADDomainControllers", "DomainController", "Server", "Servers", "Computer", "Computers", "ComputerName")] [string[]] $Machine = $Env:COMPUTERNAME,
        [alias ("StartTime", "From")][nullable[DateTime]] $DateFrom = $null,
        [alias ("EndTime", "To")][nullable[DateTime]] $DateTo = $null,
        [alias ("Ids", "EventID", "EventIds")] [int[]] $ID = $null,
        [alias ("ExludeEventID")][int[]] $ExcludeID = $null,
        [alias ("LogType", "Log")][string] $LogName = $null,
        [alias ("Provider")] [string] $ProviderName = '',
        [hashtable] $NamedDataFilter,
        [hashtable] $NamedDataExcludeFilter,
        [string[]] $UserID,
        [PSEventViewer.Level[]] $Level = $null,
        [string] $UserSID = $null,
        [string[]]$Data = $null,
        [int] $MaxEvents = $null,
        [PSCredential] $Credentials = $null,
        [string] $Path = $null,
        [PSEventViewer.Keywords[]] $Keywords = $null,
        [alias("EventRecordID")][int64] $RecordID,
        [int] $MaxRunspaces = [int]$env:NUMBER_OF_PROCESSORS + 1,
        [switch] $Oldest,
        [switch] $DisableParallel,
        [switch] $ExtendedOutput,
        [Array] $ExtendedInput
    )
    if ($PSCmdlet.MyInvocation.BoundParameters["Verbose"].IsPresent) { $Verbose = $true } else { $Verbose = $false }

    $MeasureTotal = [System.Diagnostics.Stopwatch]::StartNew() # Timer Start
    $ParametersList = [System.Collections.Generic.List[Object]]::new()

    if ($ExtendedInput.Count -gt 0) {
        # Special input - PSWinReporting requires it
        [Array] $Param = foreach ($EventEntry in $ExtendedInput) {         
            $EventFilter = @{}
            if ($EventEntry.Type -eq 'File') {
                Write-Verbose "Get-Events - Preparing data to scan file $($EventEntry.Server)"
                Add-ToHashTable -Hashtable $EventFilter -Key "Path" -Value $EventEntry.Server
                $Comp = $Env:COMPUTERNAME
            } else {
                Write-Verbose "Get-Events - Preparing data to scan computer $($EventEntry.Server)"
                $Comp = $EventEntry.Server
            }            
            $ConvertedLevels = foreach ($Data in $EventEntry.Level) {
                ([PSEventViewer.Level]::$Data).value__
            }
            $ConvertedKeywords = foreach ($Data in $EventEntry.Keywords) {
                ([PSEventViewer.Keywords]::$Data).value__
            }
            Add-ToHashTable -Hashtable $EventFilter -Key "LogName" -Value $EventEntry.LogName
            Add-ToHashTable -Hashtable $EventFilter -Key "StartTime" -Value $EventEntry.DateFrom
            Add-ToHashTable -Hashtable $EventFilter -Key "EndTime" -Value $EventEntry.DateTo
            Add-ToHashTable -Hashtable $EventFilter -Key "Keywords" -Value $ConvertedKeywords
            Add-ToHashTable -Hashtable $EventFilter -Key "Level" -Value $ConvertedLevels
            Add-ToHashTable -Hashtable $EventFilter -Key "UserID" -Value $EventEntry.UserSID
            Add-ToHashTable -Hashtable $EventFilter -Key "Data" -Value $EventEntry.Data
            Add-ToHashTable -Hashtable $EventFilter -Key "RecordID" -Value $EventEntry.RecordID
            Add-ToHashTable -Hashtable $EventFilter -Key "NamedDataFilter" -Value $EventEntry.NamedDataFilter
            Add-ToHashTable -Hashtable $EventFilter -Key "NamedDataExcludeFilter" -Value $EventEntry.NamedDataExcludeFilter
            Add-ToHashTable -Hashtable $EventFilter -Key "UserID" -Value $EventEntry.UserID
            Add-ToHashTable -Hashtable $EventFilter -Key "ExcludeID" -Value $EventEntry.ExcludeID
            
            if ($Verbose) {
                foreach ($Key in $EventFilter.Keys) {
                    if ($Key -eq 'NamedDataFilter' -or $Key -eq 'NamedDataExcludeFilter') {
                        foreach ($SubKey in $($EventFilter.$Key).Keys) {
                            Write-Verbose "Get-Events - Filter parameters provided $Key with SubKey $SubKey = $(($EventFilter.$Key.$SubKey) -join ', ')"
                        }
                    } else {
                        Write-Verbose "Get-Events - Filter parameters provided $Key = $(($EventFilter.$Key) -join ', ')"
                    }
                }
            }
            if ($null -ne $EventEntry.EventID) {
                $ID = $EventEntry.EventID | Sort-Object -Unique
                Write-Verbose "Get-Events - Events to process in Total (unique): $($Id.Count)"
                Write-Verbose "Get-Events - Events to process in Total ID: $($ID -join ', ')"
                if ($Id.Count -gt 22) {
                    Write-Verbose "Get-Events - There are more events to process then 22, split will be required."
                }
                $SplitArrayID = Split-Array -inArray $ID -size 22  # Support for more ID's then 22 (limitation of Get-WinEvent)
                foreach ($EventIdGroup in $SplitArrayID) {
                    $EventFilter.Id = @($EventIdGroup)
                    @{
                        Comp        = $Comp
                        EventFilter = $EventFilter.Clone()
                        MaxEvents   = $EventEntry.MaxEvents
                        Oldest      = $Oldest
                        Verbose     = $Verbose
                    }
                }
            } else {                
                @{
                    Comp        = $Comp
                    EventFilter = $EventFilter
                    MaxEvents   = $EventEntry.MaxEvents
                    Oldest      = $Oldest
                    Verbose     = $Verbose
                }
            }
        }
        if ($null -ne $Param) {
            $null = $ParametersList.AddRange($Param)
        }
    } else {
        # Standard input
        $EventFilter = @{}
        Add-ToHashTable -Hashtable $EventFilter -Key "LogName" -Value $LogName # Accepts Wildcard
        Add-ToHashTable -Hashtable $EventFilter -Key "ProviderName" -Value $ProviderName # Accepts Wildcard
        Add-ToHashTable -Hashtable $EventFilter -Key "Path" -Value $Path # https://blogs.technet.microsoft.com/heyscriptingguy/2011/01/25/use-powershell-to-parse-saved-event-logs-for-errors/
        Add-ToHashTable -Hashtable $EventFilter -Key "Keywords" -Value $Keywords.value__
        Add-ToHashTable -Hashtable $EventFilter -Key "Level" -Value $Level.value__
        Add-ToHashTable -Hashtable $EventFilter -Key "StartTime" -Value $DateFrom
        Add-ToHashTable -Hashtable $EventFilter -Key "EndTime" -Value $DateTo
        Add-ToHashTable -Hashtable $EventFilter -Key "UserID" -Value $UserSID
        Add-ToHashTable -Hashtable $EventFilter -Key "Data" -Value $Data
        Add-ToHashTable -Hashtable $EventFilter -Key "RecordID" -Value $RecordID
        Add-ToHashTable -Hashtable $EventFilter -Key "NamedDataFilter" -Value $NamedDataFilter
        Add-ToHashTable -Hashtable $EventFilter -Key "NamedDataExcludeFilter" -Value $NamedDataExcludeFilter
        Add-ToHashTable -Hashtable $EventFilter -Key "UserID" -Value $UserID
        Add-ToHashTable -Hashtable $EventFilter -Key "ExcludeID" -Value $ExcludeID

        [Array] $Param = foreach ($Comp in $Machine) {
            if ($Verbose) {
                Write-Verbose "Get-Events - Preparing data to scan computer $Comp"
                foreach ($Key in $EventFilter.Keys) {
                    if ($Key -eq 'NamedDataFilter' -or $Key -eq 'NamedDataExcludeFilter') {
                        foreach ($SubKey in $($EventFilter.$Key).Keys) {
                            Write-Verbose "Get-Events - Filter parameters provided $Key with SubKey $SubKey = $(($EventFilter.$Key.$SubKey) -join ', ')"
                        }
                    } else {
                        Write-Verbose "Get-Events - Filter parameters provided $Key = $(($EventFilter.$Key) -join ', ')"
                    }
                }
            }
            if ($null -ne $ID) {
                # EventID needed
                $ID = $ID | Sort-Object -Unique
                Write-Verbose "Get-Events - Events to process in Total (unique): $($Id.Count)"
                Write-Verbose "Get-Events - Events to process in Total ID: $($ID -join ', ')"
                if ($Id.Count -gt 22) {
                    Write-Verbose "Get-Events - There are more events to process then 22, split will be required."
                }
                $SplitArrayID = Split-Array -inArray $ID -size 22  # Support for more ID's then 22 (limitation of Get-WinEvent)
                foreach ($EventIdGroup in $SplitArrayID) {
                    $EventFilter.Id = @($EventIdGroup)
                    @{
                        Comp        = $Comp
                        EventFilter = $EventFilter.Clone()
                        MaxEvents   = $MaxEvents
                        Oldest      = $Oldest
                        Verbose     = $Verbose
                    }
                } 
            } else {
                # No EventID given
                @{
                    Comp        = $Comp
                    EventFilter = $EventFilter
                    MaxEvents   = $MaxEvents
                    Oldest      = $Oldest
                    Verbose     = $Verbose
                }
            }
        }
        if ($null -ne $Param) {
            $null = $ParametersList.AddRange($Param)
        }
    }
    $AllErrors = @()
    if ($DisableParallel) {
        Write-Verbose 'Get-Events - Running query with parallel disabled...'
        [Array] $AllEvents = foreach ($Param in $ParametersList) {  
            Invoke-Command -ScriptBlock $Script:ScriptBlock -ArgumentList $Param.Comp, $Param.EventFilter, $Param.MaxEvents, $Param.Oldest, $Param.Verbose
        }
    } else {
        Write-Verbose 'Get-Events - Running query with parallel enabled...'
        $RunspacePool = New-Runspace -MaxRunspaces $maxRunspaces -Verbose:$Verbose
        $Runspaces = foreach ($Parameter in $ParametersList) {    
            Start-Runspace -ScriptBlock $Script:ScriptBlock -Parameters $Parameter -RunspacePool $RunspacePool -Verbose:$Verbose
        }        
        [Array] $AllEvents = Stop-Runspace -Runspaces $Runspaces -FunctionName "Get-Events" -RunspacePool $RunspacePool -Verbose:$Verbose -ErrorAction SilentlyContinue -ErrorVariable +AllErrors -ExtendedOutput:$ExtendedOutput
    }
    #$EventsProcessed = Get-ObjectCount -Object $AllEvents
    Write-Verbose "Get-Events - Overall errors: $($AllErrors.Count)"
    Write-Verbose "Get-Events - Overall events processed in total for the report: $($AllEvents.Count)"
    Write-Verbose "Get-Events - Overall time to generate $($MeasureTotal.Elapsed.Hours) hours, $($MeasureTotal.Elapsed.Minutes) minutes, $($MeasureTotal.Elapsed.Seconds) seconds, $($MeasureTotal.Elapsed.Milliseconds) milliseconds"
    $MeasureTotal.Stop()
    Write-Verbose "Get-Events - Overall events processing end"
    #if ($ExtendedOutput) {
    # return , $AllEvents # returns @{ Output and Errors }
    #}
    if ($AllEvents.Count -eq 1) {
        return , $AllEvents
    } else {
        return $AllEvents
    }
}
function Get-EventsFilter {
    <#
    .SYNOPSIS
    This function generates an xpath filter that can be used with the -FilterXPath
    parameter of Get-WinEvent. It may also be used inside the <Select></Select tags
    of a Custom View in Event Viewer.
    .DESCRIPTION
    This function generates an xpath filter that can be used with the -FilterXPath
    parameter of Get-WinEvent. It may also be used inside the <Select></Select tags
    of a Custom View in Event Viewer.
 
    This function allows for the create of xpath which can select events based on
    many properties of the event including those of named data nodes in the event's
    XML.
 
    XPath is case sensetive and the data passed to the parameters here must
    match the case of the data in the event's XML.
    .NOTES
    Original Code by https://community.spiceworks.com/scripts/show/3238-powershell-xpath-generator-for-windows-events
    Extended by Justin Grote
    Extended by Przemyslaw Klys
    .LINK
 
    .PARAMETER ID
    This parameter accepts and array of event ids to include in the xpath filter.
    .PARAMETER StartTime
    This parameter sets the oldest event that may be returned by the xpath.
 
    Please, note that the xpath time selector created here is based of of the
    time the xpath is generated. XPath uses a time difference method to select
    events by time; that time difference being the number of milliseconds between
    the time and now.
    .PARAMETER EndTime
    This parameter sets the newest event that may be returned by the xpath.
 
    Please, note that the xpath time selector created here is based of of the
    time the xpath is generated. XPath uses a time difference method to select
    events by time; that time difference being the number of milliseconds between
    the time and now.
    .PARAMETER Data
    This parameter will accept an array of values that may be found in the data
    section of the event's XML.
    .PARAMETER ProviderName
    This parameter will accept an array of values that select events from event
    providers.
    .PARAMETER Level
    This parameter will accept an array of values that specify the severity
    rating of the events to be returned.
 
    It accepts the following values.
 
    'Critical',
    'Error',
    'Informational',
    'LogAlways',
    'Verbose',
    'Warning'
    .PARAMETER Keywords
    This parameter accepts and array of long integer keywords. You must
    pass this parameter the long integer value of the keywords you want
    to search and not the keyword description.
    .PARAMETER UserID
    This parameter will accept an array of SIDs or domain accounts.
    .PARAMETER NamedDataFilter
    This parameter will accept and array of hashtables that define the key
    value pairs for which you want to filter against the event's named data
    fields.
 
    Key values, as with XPath filters, are case sensetive.
 
    You may assign an array as the value of any key. This will search
    for events where any of the values are present in that particular
    data field. If you wanted to define a filter that searches for a SubjectUserName
    of either john.doe or jane.doe, pass the following
 
    @{'SubjectUserName'=('john.doe','jane.doe')}
 
    You may specify multiple data files and values. Doing so will create
    an XPath filter that will only return results where both values
    are found. If you only wanted to return events where both the
    SubjectUserName is john.doe and the TargetUserName is jane.doe, then
    pass the following
 
    @{'SubjectUserName'='john.doe';'TargetUserName'='jane.doe'}
 
    You may pass an array of hash tables to create an 'or' XPath filter
    that will return objects where either key value set will be returned.
    If you wanted to define a filter that searches for either a
    SubjectUserName of john.doe or a TargetUserName of jane.doe then pass
    the following
 
    (@{'SubjectUserName'='john.doe'},@{'TargetUserName'='jane.doe'})
    .EXAMPLE
    Get-EventsFilter -ID 4663 -NamedDataFilter @{'SubjectUserName'='john.doe'} -LogName 'ForwardedEvents'
 
    This will return an XPath filter that will return any events with
    the id of 4663 and has a SubjectUserName of 'john.doe'
 
    Output:
    <QueryList>
        <Query Id="0" Path="ForwardedEvents">
            <Select Path="ForwardedEvents">
                    (*[System[EventID=4663]]) and (*[EventData[Data[@Name='SubjectUserName'] = 'john.doe']])
            </Select>
        </Query>
    </QueryList>
 
    .EXAMPLE
    Get-EventsFilter -StartTime '1/1/2015 01:30:00 PM' -EndTime '1/1/2015 02:00:00 PM' -LogName 'ForwardedEvents
 
    This will return an XPath filter that will return events that occured between 1:30
    2:00 PM on 1/1/2015. The filter will only be good if used immediately. XPath time
    filters are based on the number of milliseconds that have occured since the event
    and when the filter is used. StartTime and EndTime simply calculate the number of
    milliseconds and use that for the filter.
 
    Output:
    <QueryList>
        <Query Id="0" Path="ForwardedEvents">
            <Select Path="ForwardedEvents">
                    (*[System[TimeCreated[timediff(@SystemTime) &lt;= 125812885399]]]) and (*[System[TimeCreated[timediff(@SystemTime)
&gt;= 125811085399]]])
            </Select>
        </Query>
    </QueryList>
 
    .EXAMPLE
    Get-EventsFilter -StartTime (Get-Date).AddDays(-1) -LogName System
 
    This will return an XPath filter that will get events that occured within the last 24 hours.
 
    Output:
    <QueryList>
        <Query Id="0" Path="System">
                <Select Path="System">
                    *[System[TimeCreated[timediff(@SystemTime) &lt;= 86404194]]]
            </Select>
        </Query>
    </QueryList>
 
    .EXAMPLE
    Get-EventsFilter -ID 1105 -LogName 'ForwardedEvents' -RecordID '3512231','3512232'
 
    This will return an XPath filter that will get events with EventRecordID 3512231 or 3512232 in Log ForwardedEvents with EventID 1105
 
    Output:
    <QueryList>
        <Query Id="0" Path="ForwardedEvents">
                <Select Path="ForwardedEvents">
                    (*[System[EventID=1105]]) and (*[System[(EventRecordID=3512231) or (EventRecordID=3512232)]])
            </Select>
        </Query>
    </QueryList>
    #>


    [CmdletBinding()]
    Param
    (
        [String[]]
        $ID,

        [alias('RecordID')][string[]]
        $EventRecordID,

        [DateTime]
        $StartTime,

        [DateTime]
        $EndTime,

        [String[]]
        $Data,

        [String[]]
        $ProviderName,

        [Long[]]
        $Keywords,

        [ValidateSet(
            'Critical',
            'Error',
            'Informational',
            'LogAlways',
            'Verbose',
            'Warning'
        )]
        [String[]]
        $Level,

        [String[]]
        $UserID,

        [Hashtable[]]
        $NamedDataFilter,

        [Hashtable[]]
        $NamedDataExcludeFilter,

        [String[]]
        $ExcludeID,

        [Parameter(Mandatory = $true)][String]
        $LogName,

        [switch] $XPathOnly
    )

    #region Function definitions
    Function Join-XPathFilter {
        Param
        (
            [Parameter(
                Mandatory = $True,
                Position = 0
            )]
            [String]
            $NewFilter,

            [Parameter(
                Position = 1
            )]
            [String]
            $ExistingFilter = '',

            [Parameter(
                Position = 2
            )]
            # and and or are case sensitive
            # in xpath
            [ValidateSet(
                "and",
                "or",
                IgnoreCase = $False
            )]
            [String]
            $Logic = 'and',

            [switch]$NoParenthesis
        )

        If ($ExistingFilter) {
            # If there is an existing filter add parenthesis unless noparenthesis is specified
            # and the logical operator
            if ($NoParenthesis) {
                Return "$ExistingFilter $Logic $NewFilter"
            } Else {
                Return "($ExistingFilter) $Logic ($NewFilter)"
            }
        } Else {
            Return $NewFilter
        }
        <#
    .SYNOPSIS
    This function handles the parenthesis and logical joining
    of XPath statements inside of Get-EventsFilter
    #>

    }

    Function Initialize-XPathFilter {
        Param
        (
            [Object[]]
            $Items,

            [String]
            $ForEachFormatString,

            [String]
            $FinalizeFormatString,

            [switch]$NoParenthesis
        )

        $filter = ''

        ForEach ($item in $Items) {
            $options = @{
                'NewFilter'      = ($ForEachFormatString -f $item)
                'ExistingFilter' = $filter
                'Logic'          = 'or'
                'NoParenthesis'  = $NoParenthesis
            }
            $filter = Join-XPathFilter @options
        }

        Return $FinalizeFormatString -f $filter
        <#
    .SYNOPSIS
    This function loops thru a set of items and injecting each
    item in the format string given by ForEachFormatString, then
    combines each of those items together with 'or' logic
    using the function Join-XPathFilter, which handles the
    joining and parenthesis. Before returning the result,
    it injects the resultant xpath into FinalizeFormatString.
 
    This function is a part of Get-EventsFilter
    #>

    }
    #endregion Function definitions

    [string] $filter = ''

    #region ID filter
    If ($ID) {
        $options = @{
            'Items'                = $ID
            'ForEachFormatString'  = "EventID={0}"
            'FinalizeFormatString' = "*[System[{0}]]"
        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion ID filter

    # region EventRecordID filter
    If ($EventRecordID) {
        $options = @{
            'Items'                = $EventRecordID
            'ForEachFormatString'  = "EventRecordID={0}"
            'FinalizeFormatString' = "*[System[{0}]]"
        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion EventRecordID filter

    #region Exclude ID filter
    If ($ExcludeID) {
        $options = @{
            'Items'                = $ExcludeID
            'ForEachFormatString'  = "EventID!={0}"
            'FinalizeFormatString' = "*[System[{0}]]"
        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion Exclude ID filter

    #region Date filters
    $Now = Get-Date

    # Time in XPath is filtered based on the number of milliseconds
    # between the creation of the event and when the XPath filter is
    # used.
    #
    # The timediff xpath function is used against the SystemTime
    # attribute of the TimeCreated node.

    ## Special chars needs replacement
    # <= is &lt;=
    # < is &lt;
    # > is &gt;
    # >= is &gt;=
    #

    If ($StartTime) {
        $Diff = [Math]::Round($Now.Subtract($StartTime).TotalMilliseconds)
        $filter = Join-XPathFilter -NewFilter "*[System[TimeCreated[timediff(@SystemTime) &lt;= $Diff]]]" -ExistingFilter $filter
    }

    If ($EndTime) {
        $Diff = [Math]::Round($Now.Subtract($EndTime).TotalMilliseconds)
        $filter = Join-XPathFilter -NewFilter "*[System[TimeCreated[timediff(@SystemTime) &gt;= $Diff]]]" -ExistingFilter $filter
    }
    #endregion Date filters

    #region Data filter
    If ($Data) {
        $options = @{
            'Items'                = $Data
            'ForEachFormatString'  = "Data='{0}'"
            'FinalizeFormatString' = "*[EventData[{0}]]"
        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion Data filter

    #region ProviderName filter
    If ($ProviderName) {
        $options = @{
            'Items'                = $ProviderName
            'ForEachFormatString'  = "@Name='{0}'"
            'FinalizeFormatString' = "*[System[Provider[{0}]]]"
        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion ProviderName filter

    #region Level filter
    If ($Level) {
        $levels = ForEach ($item in $Level) {
            # Levels in an event's XML are defined
            # with integer values.
            [Int][System.Diagnostics.Tracing.EventLevel]::$item
        }

        $options = @{
            'Items'                = $levels
            'ForEachFormatString'  = "Level={0}"
            'FinalizeFormatString' = "*[System[{0}]]"
        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion Level filter

    #region Keyword filter
    # Keywords are stored as a long integer
    # numeric value. That integer is the
    # flagged (binary) combination of
    # all the keywords.
    #
    # By combining all given keywords
    # with a binary OR operation, and then
    # taking the resultant number and
    # comparing that against the number
    # stored in the events XML with a
    # binary AND operation will return
    # events that have any of the submitted
    # keywords assigned.
    If ($Keywords) {
        $keyword_filter = ''

        ForEach ($item in $Keywords) {
            If ($keyword_filter) {
                $keyword_filter = $keyword_filter -bor $item
            } Else {
                $keyword_filter = $item
            }
        }

        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter "*[System[band(Keywords,$keyword_filter)]]"
    }
    #endregion Keyword filter

    #region UserID filter
    # The UserID attribute of the Security node contains a Sid.
    If ($UserID) {
        $sids = ForEach ($item in $UserID) {
            Try {
                #If the value submitted isn't a valid sid, it'll error.
                $sid = [System.Security.Principal.SecurityIdentifier]($item)
                $sid = $sid.Translate([System.Security.Principal.SecurityIdentifier])
            } Catch [System.Management.Automation.RuntimeException] {
                # If a RuntimeException occured with an InvalidArgument category
                # attempt to create an NTAccount object and resolve.
                If ($Error[0].CategoryInfo.Category -eq 'InvalidArgument') {
                    Try {
                        $user = [System.Security.Principal.NTAccount]($item)
                        $sid = $user.Translate([System.Security.Principal.SecurityIdentifier])
                    } Catch {
                        #There was an error with either creating the NTAccount or
                        #Translating that object to a sid.
                        Throw $Error[0]
                    }
                } Else {
                    #There was a RuntimeException from either creating the
                    #SecurityIdentifier object or the translation
                    #and the category was not InvalidArgument
                    Throw $Error[0]
                }
            } Catch {
                #There was an error from ether the creation of the SecurityIdentifier
                #object or the Translatation
                Throw $Error[0]
            }

            $sid.Value
        }

        $options = @{
            'Items'                = $sids
            'ForEachFormatString'  = "@UserID='{0}'"
            'FinalizeFormatString' = "*[System[Security[{0}]]]"
        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion UserID filter

    #region NamedDataFilter
    If ($NamedDataFilter) {
        $options = @{
            'Items'                = $(
                # This will create set of datafilters for each of
                # the hash tables submitted in the hash table array
                ForEach ($item in $NamedDataFilter) {
                    $options = @{
                        'Items'                = $(
                            #This will result in as set of XPath subexpressions
                            #for each key submitted in the hashtable
                            ForEach ($key in $item.Keys) {
                                If ($item[$key]) {
                                    #If there is a value for the key, create the
                                    #XPath for the Data node with that Name attribute
                                    #and value. Use 'and' logic to join the data values.
                                    #to the Name Attribute.
                                    $options = @{
                                        'Items'                = $item[$key]
                                        'NoParenthesis'        = $true
                                        'ForEachFormatString'  = "'{0}'"
                                        'FinalizeFormatString' = "Data[@Name='$key'] = {0}"
                                    }
                                    Initialize-XPathFilter @options
                                } Else {
                                    #If there isn't a value for the key, create
                                    #XPath for the existence of the Data node with
                                    #that paritcular Name attribute.
                                    "Data[@Name='$key']"
                                }
                            }
                        )
                        'ForEachFormatString'  = "{0}"
                        'FinalizeFormatString' = "{0}"
                    }
                    Initialize-XPathFilter @options
                }
            )
            'ForEachFormatString'  = "{0}"
            'FinalizeFormatString' = "*[EventData[{0}]]"

        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion NamedDataFilter

    #region NamedDataExcludeFilter
    If ($NamedDataExcludeFilter) {
        $options = @{
            'Items'                = $(
                # This will create set of datafilters for each of
                # the hash tables submitted in the hash table array
                ForEach ($item in $NamedDataExcludeFilter) {
                    $options = @{
                        'Items'                = $(
                            #This will result in as set of XPath subexpressions
                            #for each key submitted in the hashtable
                            ForEach ($key in $item.Keys) {
                                If ($item[$key]) {
                                    #If there is a value for the key, create the
                                    #XPath for the Data node with that Name attribute
                                    #and value. Use 'and' logic to join the data values.
                                    #to the Name Attribute.
                                    $options = @{
                                        'Items'                = $item[$key]
                                        'NoParenthesis'        = $true
                                        'ForEachFormatString'  = "'{0}'"
                                        'FinalizeFormatString' = "Data[@Name='$key'] != {0}"
                                    }
                                    Initialize-XPathFilter @options
                                } Else {
                                    #If there isn't a value for the key, create
                                    #XPath for the existence of the Data node with
                                    #that paritcular Name attribute.
                                    "Data[@Name='$key']"
                                }
                            }
                        )
                        'ForEachFormatString'  = "{0}"
                        'FinalizeFormatString' = "{0}"
                    }
                    Initialize-XPathFilter @options
                }
            )
            'ForEachFormatString'  = "{0}"
            'FinalizeFormatString' = "*[EventData[{0}]]"

        }
        $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
    }
    #endregion NamedDataExcludeFilter

    if ($XPathOnly) {
        return $Filter
    } else {
        $FilterXML = @"
    <QueryList>
        <Query Id="0" Path="$LogName">
            <Select Path="$LogName">
                    $filter
            </Select>
        </Query>
    </QueryList>
"@

        return $FilterXML
    }
    # Return $filter

} # Function Get-EventsFilter
function Get-EventsInformation {
    <#
    .SYNOPSIS
    Small wrapper against Get-WinEvent providing easy way to gather statistics for Event Logs.
 
    .DESCRIPTION
    Small wrapper against Get-WinEvent providing easy way to gather statistics for Event Logs.
    It provides option to ask for multiple machines, multiple files at the same time.
    It runs on steroids (runspaces) which allows youto process everything at same time.
    This basically allows you to query 50 servers at same time and do it in finite way.
 
    .PARAMETER Machine
    ComputerName or Server you want to query. Takes an array of servers as well.
 
    .PARAMETER FilePath
    FilePath to Event Log file (with .EVTX). Takes an array of Event Log files.
 
    .PARAMETER LogName
    LogName such as Security or System. Works in conjuction with Machine (s). Default is Security.
 
    .PARAMETER MaxRunspaces
    Maximum number of runspaces running at same time. For optimum performance decide on your own. Default is 50.
 
    .EXAMPLE
    $Computer = 'EVO1','AD1','AD2'
    $LogName = 'Security'
 
    $Size = Get-EventsInformation -Computer $Computer -LogName $LogName
    $Size | ft -A
 
    Output:
 
    EventNewest EventOldest FileSize FileSizeCurrentGB FileSizeMaximumGB IsClassicLog IsEnabled IsLogFull LastAccessTime LastWriteTime
    ----------- ----------- -------- ----------------- ----------------- ------------ --------- --------- -------------- -------------
    28.12.2018 12:47:14 20.12.2018 19:29:57 110170112 0.1 GB 0.11 GB True True False 27.05.2018 14:18:36 28.12.2018 12:33:24
    28.12.2018 12:46:51 26.12.2018 12:54:16 20975616 0.02 GB 0.02 GB True True False 28.12.2018 12:46:57 28.12.2018 12:46:57
 
    .EXAMPLE
 
    Due to AD2 being down time to run is 22 seconds. This is actual timeout before letting it go.
 
    $Computers = 'EVO1', 'AD1', 'AD2'
    $LogName = 'Security'
 
    $EventLogsDirectory = Get-ChildItem -Path 'C:\MyEvents'
 
    $Size = Get-EventsInformation -FilePath $EventLogsDirectory.FullName -Computer $Computers -LogName 'Security'
    $Size | ft -a
 
    Output:
 
    VERBOSE: Get-EventsInformation - processing start
    VERBOSE: Get-EventsInformation - Setting up runspace for EVO1
    VERBOSE: Get-EventsInformation - Setting up runspace for AD1
    VERBOSE: Get-EventsInformation - Setting up runspace for AD2
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-08-21-23-49-19-424.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-08-02-53-53-711.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-14-22-13-07-710.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-15-09-27-52-679.evtx
    VERBOSE: AD2 Reading Event Log (Security) size failed. Error occured: The RPC server is unavailable
    VERBOSE: Get-EventsInformation - processing end - 0 days, 0 hours, 0 minutes, 22 seconds, 648 milliseconds
 
    EventNewest EventOldest FileSize FileSizeCurrentGB FileSizeMaximumGB IsClassicLog IsEnabled IsLogFull LastAccessTime LastWriteTime
    ----------- ----------- -------- ----------------- ----------------- ------------ --------- --------- -------------- -------------
    28.12.2018 15:56:54 20.12.2018 19:29:57 111218688 0.1 GB 0.11 GB True True False 27.05.2018 14:18:36 28.12.2018 14:18:24
    22.08.2018 01:48:57 11.08.2018 09:28:06 115740672 0.11 GB 0.11 GB False False False 16.09.2018 09:27:04 22.08.2018 01:49:20
    08.09.2018 04:53:52 03.09.2018 23:50:15 115740672 0.11 GB 0.11 GB False False False 12.09.2018 13:18:25 08.09.2018 04:53:53
    15.09.2018 00:13:06 08.09.2018 04:53:53 115740672 0.11 GB 0.11 GB False False False 15.09.2018 00:13:26 15.09.2018 00:13:08
    15.09.2018 11:27:51 22.08.2018 01:49:20 115740672 0.11 GB 0.11 GB False False False 15.09.2018 11:28:13 15.09.2018 11:27:55
    28.12.2018 15:56:56 26.12.2018 15:56:31 20975616 0.02 GB 0.02 GB True True False 28.12.2018 15:56:47 28.12.2018 15:56:47
 
    .EXAMPLE
 
    $Computers = 'EVO1', 'AD1','AD1'
    $LogName = 'Security'
 
    $EventLogsDirectory = Get-ChildItem -Path 'C:\MyEvents'
 
    $Size = Get-EventsInformation -FilePath $EventLogsDirectory.FullName -Computer $Computers -LogName 'Security' -Verbose
    $Size | ft -a Source, EventNewest, EventOldest,FileSize, FileSizeCurrentGB, FileSizeMaximumGB, IsEnabled, IsLogFull, LastAccessTime, LastWriteTime
 
    Output:
 
    VERBOSE: Get-EventsInformation - processing start
    VERBOSE: Get-EventsInformation - Setting up runspace for EVO1
    VERBOSE: Get-EventsInformation - Setting up runspace for AD1
    VERBOSE: Get-EventsInformation - Setting up runspace for AD1
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-08-21-23-49-19-424.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-08-02-53-53-711.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-14-22-13-07-710.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-15-09-27-52-679.evtx
    VERBOSE: Get-EventsInformation - processing end - 0 days, 0 hours, 0 minutes, 1 seconds, 739 milliseconds
 
    Source EventNewest EventOldest FileSize FileSizeCurrentGB FileSizeMaximumGB IsEnabled IsLogFull LastAccessTime LastWriteTime
    ------ ----------- ----------- -------- ----------------- ----------------- --------- --------- -------------- -------------
    AD1 28.12.2018 15:59:22 20.12.2018 19:29:57 111218688 0.1 GB 0.11 GB True False 27.05.2018 14:18:36 28.12.2018 14:18:24
    AD1 28.12.2018 15:59:22 20.12.2018 19:29:57 111218688 0.1 GB 0.11 GB True False 27.05.2018 14:18:36 28.12.2018 14:18:24
    File 22.08.2018 01:48:57 11.08.2018 09:28:06 115740672 0.11 GB 0.11 GB False False 16.09.2018 09:27:04 22.08.2018 01:49:20
    File 08.09.2018 04:53:52 03.09.2018 23:50:15 115740672 0.11 GB 0.11 GB False False 12.09.2018 13:18:25 08.09.2018 04:53:53
    File 15.09.2018 00:13:06 08.09.2018 04:53:53 115740672 0.11 GB 0.11 GB False False 15.09.2018 00:13:26 15.09.2018 00:13:08
    File 15.09.2018 11:27:51 22.08.2018 01:49:20 115740672 0.11 GB 0.11 GB False False 15.09.2018 11:28:13 15.09.2018 11:27:55
    EVO1 28.12.2018 15:59:22 26.12.2018 15:56:31 20975616 0.02 GB 0.02 GB True False 28.12.2018 15:58:47 28.12.2018 15:58:47
 
    .EXAMPLE
 
    $Computers = 'EVO1', 'AD1'
    $EventLogsDirectory = Get-ChildItem -Path 'C:\MyEvents'
 
    $Size = Get-EventsInformation -FilePath $EventLogsDirectory.FullName -Computer $Computers -LogName 'Security','System' -Verbose
    $Size | ft -a Source, EventNewest, EventOldest,FileSize, FileSizeCurrentGB, FileSizeMaximumGB, IsEnabled, IsLogFull, LastAccessTime, LastWriteTime, LogFilePath, LOgName
 
    VERBOSE: Get-EventsInformation - processing start
    VERBOSE: Get-EventsInformation - Setting up runspace for EVO1
    VERBOSE: Get-EventsInformation - Setting up runspace for AD1
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-08-21-23-49-19-424.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-08-02-53-53-711.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-14-22-13-07-710.evtx
    VERBOSE: Get-EventsInformation - Setting up runspace for C:\MyEvents\Archive-Security-2018-09-15-09-27-52-679.evtx
    VERBOSE: Get-EventsInformation - processing end - 0 days, 0 hours, 0 minutes, 0 seconds, 137 milliseconds
 
    Source EventNewest EventOldest FileSize FileSizeCurrentGB FileSizeMaximumGB IsEnabled IsLogFull LastAccessTime LastWriteTime LogFilePath LogName
    ------ ----------- ----------- -------- ----------------- ----------------- --------- --------- -------------- ------------- ----------- -------
    File 22.08.2018 01:48:57 11.08.2018 09:28:06 115740672 0.11 GB 0.11 GB False False 16.09.2018 09:27:04 22.08.2018 01:49:20 C:\MyEvents\Archive-Security-2018-08-21-23-49-19-424.evtx N/A
    File 08.09.2018 04:53:52 03.09.2018 23:50:15 115740672 0.11 GB 0.11 GB False False 12.09.2018 13:18:25 08.09.2018 04:53:53 C:\MyEvents\Archive-Security-2018-09-08-02-53-53-711.evtx N/A
    EVO1 28.12.2018 18:19:48 26.12.2018 17:27:30 20975616 0.02 GB 0.02 GB True False 28.12.2018 18:19:47 28.12.2018 18:19:47 %SystemRoot%\System32\Winevt\Logs\Security.evtx Security
    AD1 28.12.2018 18:20:01 20.12.2018 19:29:57 113315840 0.11 GB 0.11 GB True False 27.05.2018 14:18:36 28.12.2018 17:48:24 %SystemRoot%\System32\Winevt\Logs\Security.evtx Security
    File 15.09.2018 00:13:06 08.09.2018 04:53:53 115740672 0.11 GB 0.11 GB False False 15.09.2018 00:13:26 15.09.2018 00:13:08 C:\MyEvents\Archive-Security-2018-09-14-22-13-07-710.evtx N/A
    EVO1 28.12.2018 18:20:01 05.10.2018 01:33:48 12652544 0.01 GB 0.02 GB True False 28.12.2018 18:18:01 28.12.2018 18:18:01 %SystemRoot%\System32\Winevt\Logs\System.evtx System
    AD1 28.12.2018 18:12:47 03.12.2018 17:20:48 2166784 0 GB 0.01 GB True False 19.05.2018 20:05:07 27.12.2018 12:00:32 %SystemRoot%\System32\Winevt\Logs\System.evtx System
    File 15.09.2018 11:27:51 22.08.2018 01:49:20 115740672 0.11 GB 0.11 GB False False 15.09.2018 11:28:13 15.09.2018 11:27:55 C:\MyEvents\Archive-Security-2018-09-15-09-27-52-679.evtx N/A
 
    .NOTES
    General notes
    #>



    [CmdLetBinding()]
    param(
        [alias ("ADDomainControllers", "DomainController", "Server", "Servers", "Computer", "Computers", "ComputerName")]
        [string[]] $Machine,
        [string[]] $FilePath,
        [alias ("LogType", "Log")][string[]] $LogName = 'Security',
        [int] $MaxRunspaces = 50,
        [alias('AskDC', 'QueryDomainControllers', 'AskForest')][switch] $RunAgainstDC
    )
    Write-Verbose "Get-EventsInformation - processing start"
    if ($PSCmdlet.MyInvocation.BoundParameters["Verbose"].IsPresent) { $Verbose = $true } else { $Verbose = $false }

    $Time = Start-TimeLog
    $Pool = New-Runspace -MaxRunspaces $maxRunspaces -Verbose:$Verbose

    if ($RunAgainstDC) {
        Write-Verbose 'Get-EventsInformation - scanning for domain controllers'
        $ForestInformation = Get-WinADForestControllers
        $MachineWithErrors = $ForestInformation | Where-Object { $_.HostName -eq '' } 
        foreach ($Computer in $MachineWithErrors) {
            Write-Warning "Get-EventsInformation - Error scanning forest $($Computer.Forest) (domain: $($Computer.Domain)) error: $($Computer.Comment)"
        }
        $Machine = ($ForestInformation | Where-Object { $_.HostName -ne '' }).HostName
    }

    $RunSpaces = @(
        foreach ($Computer in $Machine) {
            foreach ($Log in $LogName) {
                Write-Verbose "Get-EventsInformation - Setting up runspace for $Computer on $Log log"
                $Parameters = [ordered] @{
                    Computer = $Computer
                    LogName  = $Log
                    Verbose  = $Verbose
                }
                # returns values
                Start-Runspace -ScriptBlock $Script:ScriptBlockEventsInformation -Parameters $Parameters -RunspacePool $Pool -Verbose:$Verbose
            }
        }
        foreach ($Path in $FilePath) {
            Write-Verbose "Get-EventsInformation - Setting up runspace for $Path"
            $Parameters = [ordered] @{
                Path    = $Path
                Verbose = $Verbose
            }
            # returns values
            Start-Runspace -ScriptBlock $Script:ScriptBlockEventsInformation -Parameters $Parameters -RunspacePool $Pool -Verbose:$Verbose
        }
    )
    ### End Runspaces START
    $AllEvents = Stop-Runspace -Runspaces $RunSpaces `
        -FunctionName "Get-EventsInformation" `
        -RunspacePool $pool -Verbose:$Verbose `
        -ErrorAction SilentlyContinue `
        -ErrorVariable +AllErrors

    foreach ($Error in $AllErrors) {
        Write-Warning "Get-EventsInformation - Error: $Error"
    }
    
    $Elapsed = Stop-TimeLog -Time $Time -Option OneLiner
    Write-Verbose -Message "Get-EventsInformation - processing end - $Elapsed"
    ### End Runspaces END
    return $AllEvents
}
Add-Type -TypeDefinition @"
using System;
 
namespace PSEventViewer
{
    public enum Keywords : long {
        AuditFailure = (long) 4503599627370496,
        AuditSuccess = (long) 9007199254740992,
        CorrelationHint2 = (long) 18014398509481984,
        EventLogClassic = (long) 36028797018963968,
        Sqm = (long) 2251799813685248,
        WdiDiagnostic = (long) 1125899906842624,
        WdiContext = (long) 562949953421312,
        ResponseTime = (long) 281474976710656,
        None = (long) 0
    }
}
"@

Add-Type -TypeDefinition @"
using System;
 
namespace PSEventViewer
{
    public enum Level {
        Verbose = 5,
        Informational = 4,
        Warning = 3,
        Error = 2,
        Critical = 1,
        LogAlways = 0
    }
}
"@

$Script:ScriptBlock = {
    Param (
        [string]$Comp,
        [hashtable]$EventFilter,
        [int]$MaxEvents,
        [bool] $Oldest,
        [bool] $Verbose
    )
    if ($Verbose) {
        $VerbosePreference = 'continue'
    }
    function Get-EventsFilter {
        <#
        .SYNOPSIS
        This function generates an xpath filter that can be used with the -FilterXPath
        parameter of Get-WinEvent. It may also be used inside the <Select></Select tags
        of a Custom View in Event Viewer.
        .DESCRIPTION
        This function generates an xpath filter that can be used with the -FilterXPath
        parameter of Get-WinEvent. It may also be used inside the <Select></Select tags
        of a Custom View in Event Viewer.
 
        This function allows for the create of xpath which can select events based on
        many properties of the event including those of named data nodes in the event's
        XML.
 
        XPath is case sensetive and the data passed to the parameters here must
        match the case of the data in the event's XML.
        .NOTES
        Original Code by https://community.spiceworks.com/scripts/show/3238-powershell-xpath-generator-for-windows-events
        Extended by Justin Grote
        Extended by Przemyslaw Klys
        .LINK
 
        .PARAMETER ID
        This parameter accepts and array of event ids to include in the xpath filter.
        .PARAMETER StartTime
        This parameter sets the oldest event that may be returned by the xpath.
 
        Please, note that the xpath time selector created here is based of of the
        time the xpath is generated. XPath uses a time difference method to select
        events by time; that time difference being the number of milliseconds between
        the time and now.
        .PARAMETER EndTime
        This parameter sets the newest event that may be returned by the xpath.
 
        Please, note that the xpath time selector created here is based of of the
        time the xpath is generated. XPath uses a time difference method to select
        events by time; that time difference being the number of milliseconds between
        the time and now.
        .PARAMETER Data
        This parameter will accept an array of values that may be found in the data
        section of the event's XML.
        .PARAMETER ProviderName
        This parameter will accept an array of values that select events from event
        providers.
        .PARAMETER Level
        This parameter will accept an array of values that specify the severity
        rating of the events to be returned.
 
        It accepts the following values.
 
        'Critical',
        'Error',
        'Informational',
        'LogAlways',
        'Verbose',
        'Warning'
        .PARAMETER Keywords
        This parameter accepts and array of long integer keywords. You must
        pass this parameter the long integer value of the keywords you want
        to search and not the keyword description.
        .PARAMETER UserID
        This parameter will accept an array of SIDs or domain accounts.
        .PARAMETER NamedDataFilter
        This parameter will accept and array of hashtables that define the key
        value pairs for which you want to filter against the event's named data
        fields.
 
        Key values, as with XPath filters, are case sensetive.
 
        You may assign an array as the value of any key. This will search
        for events where any of the values are present in that particular
        data field. If you wanted to define a filter that searches for a SubjectUserName
        of either john.doe or jane.doe, pass the following
 
        @{'SubjectUserName'=('john.doe','jane.doe')}
 
        You may specify multiple data files and values. Doing so will create
        an XPath filter that will only return results where both values
        are found. If you only wanted to return events where both the
        SubjectUserName is john.doe and the TargetUserName is jane.doe, then
        pass the following
 
        @{'SubjectUserName'='john.doe';'TargetUserName'='jane.doe'}
 
        You may pass an array of hash tables to create an 'or' XPath filter
        that will return objects where either key value set will be returned.
        If you wanted to define a filter that searches for either a
        SubjectUserName of john.doe or a TargetUserName of jane.doe then pass
        the following
 
        .PARAMETER XPathOnly
        This is switch. If used only XPATH filter is returned. Otherwise full XML.
 
        (@{'SubjectUserName'='john.doe'},@{'TargetUserName'='jane.doe'})
        .EXAMPLE
        Get-EventsFilter -ID 4663 -NamedDataFilter @{'SubjectUserName'='john.doe'} -LogName 'ForwardedEvents'
 
        This will return an XPath filter that will return any events with
        the id of 4663 and has a SubjectUserName of 'john.doe'
 
        Output:
        <QueryList>
            <Query Id="0" Path="ForwardedEvents">
                <Select Path="ForwardedEvents">
                        (*[System[EventID=4663]]) and (*[EventData[Data[@Name='SubjectUserName'] = 'john.doe']])
                </Select>
            </Query>
        </QueryList>
 
        .EXAMPLE
        Get-EventsFilter -StartTime '1/1/2015 01:30:00 PM' -EndTime '1/1/2015 02:00:00 PM' -LogName 'ForwardedEvents
 
        This will return an XPath filter that will return events that occured between 1:30
        2:00 PM on 1/1/2015. The filter will only be good if used immediately. XPath time
        filters are based on the number of milliseconds that have occured since the event
        and when the filter is used. StartTime and EndTime simply calculate the number of
        milliseconds and use that for the filter.
 
        Output:
        <QueryList>
            <Query Id="0" Path="ForwardedEvents">
                <Select Path="ForwardedEvents">
                        (*[System[TimeCreated[timediff(@SystemTime) &lt;= 125812885399]]]) and (*[System[TimeCreated[timediff(@SystemTime)
    &gt;= 125811085399]]])
                </Select>
            </Query>
        </QueryList>
 
        .EXAMPLE
        Get-EventsFilter -StartTime (Get-Date).AddDays(-1) -LogName System
 
        This will return an XPath filter that will get events that occured within the last 24 hours.
 
        Output:
        <QueryList>
            <Query Id="0" Path="System">
                    <Select Path="System">
                        *[System[TimeCreated[timediff(@SystemTime) &lt;= 86404194]]]
                </Select>
            </Query>
        </QueryList>
 
        .EXAMPLE
        Get-EventsFilter -ID 1105 -LogName 'ForwardedEvents' -RecordID '3512231','3512232'
 
        This will return an XPath filter that will get events with EventRecordID 3512231 or 3512232 in Log ForwardedEvents with EventID 1105
 
        Output:
        <QueryList>
            <Query Id="0" Path="ForwardedEvents">
                    <Select Path="ForwardedEvents">
                        (*[System[EventID=1105]]) and (*[System[(EventRecordID=3512231) or (EventRecordID=3512232)]])
                </Select>
            </Query>
        </QueryList>
        #>


        [CmdletBinding()]
        Param
        (
            [String[]]
            $ID,

            [alias('RecordID')][string[]]
            $EventRecordID,

            [DateTime]
            $StartTime,

            [DateTime]
            $EndTime,

            [String[]]
            $Data,

            [String[]]
            $ProviderName,

            [Long[]]
            $Keywords,

            [ValidateSet(
                'Critical',
                'Error',
                'Informational',
                'LogAlways',
                'Verbose',
                'Warning'
            )]
            [String[]]
            $Level,

            [String[]]
            $UserID,

            [Hashtable[]]
            $NamedDataFilter,

            [Hashtable[]]
            $NamedDataExcludeFilter,

            [String[]]
            $ExcludeID,

            [Parameter(Mandatory = $true)][String]
            $LogName
        )

        #region Function definitions
        Function Join-XPathFilter {
            Param
            (
                [Parameter(
                    Mandatory = $True,
                    Position = 0
                )]
                [String]
                $NewFilter,

                [Parameter(
                    Position = 1
                )]
                [String]
                $ExistingFilter = '',

                [Parameter(
                    Position = 2
                )]
                # and and or are case sensitive
                # in xpath
                [ValidateSet(
                    "and",
                    "or",
                    IgnoreCase = $False
                )]
                [String]
                $Logic = 'and',

                [switch]$NoParenthesis
            )

            If ($ExistingFilter) {
                # If there is an existing filter add parenthesis unless noparenthesis is specified
                # and the logical operator
                if ($NoParenthesis) {
                    Return "$ExistingFilter $Logic $NewFilter"
                } Else {
                    Return "($ExistingFilter) $Logic ($NewFilter)"
                }
            } Else {
                Return $NewFilter
            }
            <#
        .SYNOPSIS
        This function handles the parenthesis and logical joining
        of XPath statements inside of Get-EventsFilter
        #>

        }

        Function Initialize-XPathFilter {
            Param
            (
                [Object[]]
                $Items,

                [String]
                $ForEachFormatString,

                [String]
                $FinalizeFormatString,

                [switch]$NoParenthesis
            )

            $filter = ''

            ForEach ($item in $Items) {
                $options = @{
                    'NewFilter'      = ($ForEachFormatString -f $item)
                    'ExistingFilter' = $filter
                    'Logic'          = 'or'
                    'NoParenthesis'  = $NoParenthesis
                }
                $filter = Join-XPathFilter @options
            }

            Return $FinalizeFormatString -f $filter
            <#
        .SYNOPSIS
        This function loops thru a set of items and injecting each
        item in the format string given by ForEachFormatString, then
        combines each of those items together with 'or' logic
        using the function Join-XPathFilter, which handles the
        joining and parenthesis. Before returning the result,
        it injects the resultant xpath into FinalizeFormatString.
 
        This function is a part of Get-EventsFilter
        #>

        }
        #endregion Function definitions

        [string] $filter = ''

        #region ID filter
        If ($ID) {
            $options = @{
                'Items'                = $ID
                'ForEachFormatString'  = "EventID={0}"
                'FinalizeFormatString' = "*[System[{0}]]"
            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion ID filter

        # region EventRecordID filter
        If ($EventRecordID) {
            $options = @{
                'Items'                = $EventRecordID
                'ForEachFormatString'  = "EventRecordID={0}"
                'FinalizeFormatString' = "*[System[{0}]]"
            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion EventRecordID filter

        #region Exclude ID filter
        If ($ExcludeID) {
            $options = @{
                'Items'                = $ExcludeID
                'ForEachFormatString'  = "EventID!={0}"
                'FinalizeFormatString' = "*[System[{0}]]"
            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion Exclude ID filter

        #region Date filters
        $Now = Get-Date

        # Time in XPath is filtered based on the number of milliseconds
        # between the creation of the event and when the XPath filter is
        # used.
        #
        # The timediff xpath function is used against the SystemTime
        # attribute of the TimeCreated node.

        ## Special chars needs replacement
        # <= is &lt;=
        # < is &lt;
        # > is &gt;
        # >= is &gt;=
        #

        If ($StartTime) {
            $Diff = [Math]::Round($Now.Subtract($StartTime).TotalMilliseconds)
            $filter = Join-XPathFilter -NewFilter "*[System[TimeCreated[timediff(@SystemTime) &lt;= $Diff]]]" -ExistingFilter $filter
        }

        If ($EndTime) {
            $Diff = [Math]::Round($Now.Subtract($EndTime).TotalMilliseconds)
            $filter = Join-XPathFilter -NewFilter "*[System[TimeCreated[timediff(@SystemTime) &gt;= $Diff]]]" -ExistingFilter $filter
        }
        #endregion Date filters

        #region Data filter
        If ($Data) {
            $options = @{
                'Items'                = $Data
                'ForEachFormatString'  = "Data='{0}'"
                'FinalizeFormatString' = "*[EventData[{0}]]"
            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion Data filter

        #region ProviderName filter
        If ($ProviderName) {
            $options = @{
                'Items'                = $ProviderName
                'ForEachFormatString'  = "@Name='{0}'"
                'FinalizeFormatString' = "*[System[Provider[{0}]]]"
            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion ProviderName filter

        #region Level filter
        If ($Level) {
            $levels = ForEach ($item in $Level) {
                # Levels in an event's XML are defined
                # with integer values.
                [Int][System.Diagnostics.Tracing.EventLevel]::$item
            }

            $options = @{
                'Items'                = $levels
                'ForEachFormatString'  = "Level={0}"
                'FinalizeFormatString' = "*[System[{0}]]"
            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion Level filter

        #region Keyword filter
        # Keywords are stored as a long integer
        # numeric value. That integer is the
        # flagged (binary) combination of
        # all the keywords.
        #
        # By combining all given keywords
        # with a binary OR operation, and then
        # taking the resultant number and
        # comparing that against the number
        # stored in the events XML with a
        # binary AND operation will return
        # events that have any of the submitted
        # keywords assigned.
        If ($Keywords) {
            $keyword_filter = ''

            ForEach ($item in $Keywords) {
                If ($keyword_filter) {
                    $keyword_filter = $keyword_filter -bor $item
                } Else {
                    $keyword_filter = $item
                }
            }

            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter "*[System[band(Keywords,$keyword_filter)]]"
        }
        #endregion Keyword filter

        #region UserID filter
        # The UserID attribute of the Security node contains a Sid.
        If ($UserID) {
            $sids = ForEach ($item in $UserID) {
                Try {
                    #If the value submitted isn't a valid sid, it'll error.
                    $sid = [System.Security.Principal.SecurityIdentifier]($item)
                    $sid = $sid.Translate([System.Security.Principal.SecurityIdentifier])
                } Catch [System.Management.Automation.RuntimeException] {
                    # If a RuntimeException occured with an InvalidArgument category
                    # attempt to create an NTAccount object and resolve.
                    If ($Error[0].CategoryInfo.Category -eq 'InvalidArgument') {
                        Try {
                            $user = [System.Security.Principal.NTAccount]($item)
                            $sid = $user.Translate([System.Security.Principal.SecurityIdentifier])
                        } Catch {
                            #There was an error with either creating the NTAccount or
                            #Translating that object to a sid.
                            Throw $Error[0]
                        }
                    } Else {
                        #There was a RuntimeException from either creating the
                        #SecurityIdentifier object or the translation
                        #and the category was not InvalidArgument
                        Throw $Error[0]
                    }
                } Catch {
                    #There was an error from ether the creation of the SecurityIdentifier
                    #object or the Translatation
                    Throw $Error[0]
                }

                $sid.Value
            }

            $options = @{
                'Items'                = $sids
                'ForEachFormatString'  = "@UserID='{0}'"
                'FinalizeFormatString' = "*[System[Security[{0}]]]"
            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion UserID filter

        #region NamedDataFilter
        If ($NamedDataFilter) {
            $options = @{
                'Items'                = $(
                    # This will create set of datafilters for each of
                    # the hash tables submitted in the hash table array
                    ForEach ($item in $NamedDataFilter) {
                        $options = @{
                            'Items'                = $(
                                #This will result in as set of XPath subexpressions
                                #for each key submitted in the hashtable
                                ForEach ($key in $item.Keys) {
                                    If ($item[$key]) {
                                        #If there is a value for the key, create the
                                        #XPath for the Data node with that Name attribute
                                        #and value. Use 'and' logic to join the data values.
                                        #to the Name Attribute.
                                        $options = @{
                                            'Items'                = $item[$key]
                                            'NoParenthesis'        = $true
                                            'ForEachFormatString'  = "'{0}'"
                                            'FinalizeFormatString' = "Data[@Name='$key'] = {0}"
                                        }
                                        Initialize-XPathFilter @options
                                    } Else {
                                        #If there isn't a value for the key, create
                                        #XPath for the existence of the Data node with
                                        #that paritcular Name attribute.
                                        "Data[@Name='$key']"
                                    }
                                }
                            )
                            'ForEachFormatString'  = "{0}"
                            'FinalizeFormatString' = "{0}"
                        }
                        Initialize-XPathFilter @options
                    }
                )
                'ForEachFormatString'  = "{0}"
                'FinalizeFormatString' = "*[EventData[{0}]]"

            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion NamedDataFilter

        #region NamedDataExcludeFilter
        If ($NamedDataExcludeFilter) {
            $options = @{
                'Items'                = $(
                    # This will create set of datafilters for each of
                    # the hash tables submitted in the hash table array
                    ForEach ($item in $NamedDataExcludeFilter) {
                        $options = @{
                            'Items'                = $(
                                #This will result in as set of XPath subexpressions
                                #for each key submitted in the hashtable
                                ForEach ($key in $item.Keys) {
                                    If ($item[$key]) {
                                        #If there is a value for the key, create the
                                        #XPath for the Data node with that Name attribute
                                        #and value. Use 'and' logic to join the data values.
                                        #to the Name Attribute.
                                        $options = @{
                                            'Items'                = $item[$key]
                                            'NoParenthesis'        = $true
                                            'ForEachFormatString'  = "'{0}'"
                                            'FinalizeFormatString' = "Data[@Name='$key'] != {0}"
                                        }
                                        Initialize-XPathFilter @options
                                    } Else {
                                        #If there isn't a value for the key, create
                                        #XPath for the existence of the Data node with
                                        #that paritcular Name attribute.
                                        "Data[@Name='$key']"
                                    }
                                }
                            )
                            'ForEachFormatString'  = "{0}"
                            'FinalizeFormatString' = "{0}"
                        }
                        Initialize-XPathFilter @options
                    }
                )
                'ForEachFormatString'  = "{0}"
                'FinalizeFormatString' = "*[EventData[{0}]]"

            }
            $filter = Join-XPathFilter -ExistingFilter $filter -NewFilter (Initialize-XPathFilter @options)
        }
        #endregion NamedDataExcludeFilter

        $FilterXML = @"
        <QueryList>
            <Query Id="0" Path="$LogName">
                <Select Path="$LogName">
                        $filter
                </Select>
            </Query>
        </QueryList>
"@


        return $FilterXML
        # Return $filter

    } # Function Get-EventsFilter
    function Get-EventsInternal () {
        [CmdLetBinding()]
        param (
            [string]$Comp,
            [hashtable]$EventFilter,
            [int]$MaxEvents,
            [switch] $Oldest
        )
        Write-Verbose "Get-Events - Inside $Comp for Events ID: $($EventFilter.ID)"
        Write-Verbose "Get-Events - Inside $Comp for Events LogName: $($EventFilter.LogName)"
        Write-Verbose "Get-Events - Inside $Comp for Events RecordID: $($EventFilter.RecordID)"
        Write-Verbose "Get-Events - Inside $Comp for Events Oldest: $Oldest"
        Write-Verbose "Get-Events - Inside $Comp for Events Max Events: $MaxEvents"
        $Measure = [System.Diagnostics.Stopwatch]::StartNew() # Timer Start
        
        try {
            $Events = @(
                if ($null -ne $EventFilter.RecordID -or `
                        $null -ne $EventFilter.NamedDataFilter -or `
                        $null -ne $EventFilter.ExcludeID -or `
                        $null -ne $EventFilter.NamedDataExcludeFilter -or `
                        $null -ne $EventFilter.UserID
                ) {
                    $FilterXML = Get-EventsFilter @EventFilter
                    Write-Verbose "Get-Events - Inside $Comp - Custom FilterXML: `n$FilterXML"
                    if ($MaxEvents -ne $null -and $MaxEvents -ne 0) {
                        Get-WinEvent -FilterXml $FilterXML -ComputerName $Comp -MaxEvents $MaxEvents -Oldest:$Oldest -ErrorAction Stop
                    } else {
                        Get-WinEvent -FilterXml $FilterXML -ComputerName $Comp -Oldest:$Oldest -ErrorAction Stop
                    }
                } else {
                    foreach ($k in $EventFilter.Keys) {
                        Write-Verbose "Get-Events - Inside $Comp Data in FilterHashTable $k $($EventFilter[$k])"
                    }
                    if ($MaxEvents -ne 0) {
                        Get-WinEvent -FilterHashtable $EventFilter -ComputerName $Comp -MaxEvents $MaxEvents -Oldest:$Oldest -ErrorAction Stop
                    } else {
                        Get-WinEvent -FilterHashtable $EventFilter -ComputerName $Comp -Oldest:$Oldest -ErrorAction Stop
                    }
                }
            )
            $EventsCount = ($Events | Measure-Object).Count
            Write-Verbose -Message "Get-Events - Inside $Comp Events found $EventsCount"
        } catch {
            if ($_.Exception -match "No events were found that match the specified selection criteria") {
                Write-Verbose -Message "Get-Events - Inside $Comp No events found."
            } elseif ($_.Exception -match "There are no more endpoints available from the endpoint") {
                Write-Verbose -Message "Get-Events - Inside $Comp Error $($_.Exception.Message)"
                Write-Error -Message "$Comp`: $_"
            } else {
                Write-Verbose -Message "Get-Events - Inside $Comp Error $($_.Exception.Message)"
                Write-Error -Message "$Comp`: $_"
            }
            Write-Verbose "Get-Events - Inside $Comp Time to generate $($Measure.Elapsed.Hours) hours, $($Measure.Elapsed.Minutes) minutes, $($Measure.Elapsed.Seconds) seconds, $($Measure.Elapsed.Milliseconds) milliseconds"
            $Measure.Stop()
            return
        }
        Write-Verbose "Get-Events - Inside $Comp Processing events..."

        # Parse out the event message data
        ForEach ($Event in $Events) {
            # Convert the event to XML
            $eventXML = [xml]$Event.ToXml()
            # Iterate through each one of the XML message properties
            Add-Member -InputObject $Event -MemberType NoteProperty -Name "Computer" -Value $event.MachineName.ToString() -Force
            Add-Member -InputObject $Event -MemberType NoteProperty -Name "Date" -Value $Event.TimeCreated -Force

            $EventTopNodes = Get-Member -InputObject $eventXML.Event -MemberType Properties | Where-Object { $_.Name -ne 'System' -and $_.Name -ne 'xmlns'}
            foreach ($EventTopNode in $EventTopNodes) {
                $TopNode = $EventTopNode.Name

                $EventSubsSubs = Get-Member -InputObject $eventXML.Event.$TopNode -Membertype Properties
                $h = 0
                foreach ($EventSubSub in $EventSubsSubs) {
                    $SubNode = $EventSubSub.Name
                    #$EventSubSub | ft -a
                    if ($EventSubSub.Definition -like "System.Object*") {
                        if (Get-Member -InputObject $eventXML.Event.$TopNode -name "$SubNode" -Membertype Properties) {

                            # Case 1
                            $SubSubNode = Get-Member -InputObject $eventXML.Event.$TopNode.$SubNode -MemberType Properties | Where-Object { $_.Name -ne 'xmlns' -and $_.Definition -like "string*" }
                            foreach ($Name in $SubSubNode.Name) {
                                $fieldName = $Name
                                $fieldValue = $eventXML.Event.$TopNode.$SubNode.$Name
                                Add-Member -InputObject $Event -MemberType NoteProperty -Name $fieldName -Value $fieldValue -Force
                            }
                            # Case 1

                            For ($i = 0; $i -lt $eventXML.Event.$TopNode.$SubNode.Count; $i++) {
                                if (Get-Member -InputObject $eventXML.Event.$TopNode.$SubNode[$i] -name "Name" -Membertype Properties) {
                                    # Case 2
                                    $fieldName = $eventXML.Event.$TopNode.$SubNode[$i].Name
                                    if (Get-Member -InputObject $eventXML.Event.$TopNode.$SubNode[$i] -name "#text" -Membertype Properties) {
                                        $fieldValue = $eventXML.Event.$TopNode.$SubNode[$i]."#text"
                                        if ($fieldValue -eq "-".Trim()) { $fieldValue = $fieldValue -replace "-" }
                                    } else {
                                        $fieldValue = ""
                                    }
                                    if ($fieldName -ne "") {
                                        Add-Member -InputObject $Event -MemberType NoteProperty -Name $fieldName -Value $fieldValue -Force
                                    }
                                    # Case 2
                                } else {
                                    # Case 3
                                    $Value = $eventXML.Event.$TopNode.$SubNode[$i]
                                    if ($Value.Name -ne 'Name' -and $Value.Name -ne '#text') {
                                        $fieldName = "NoNameA$i"
                                        $fieldValue = $Value
                                        Add-Member -InputObject $Event -MemberType NoteProperty -Name $fieldName -Value $fieldValue -Force
                                    }
                                    # Case 3
                                }

                            }
                        }
                    } elseif ($EventSubSub.Definition -like "System.Xml.XmlElement*") {
                        # Case 1
                        $SubSubNode = Get-Member -InputObject $eventXML.Event.$TopNode.$SubNode -MemberType Properties | Where-Object { $_.Name -ne 'xmlns' -and $_.Definition -like "string*" }
                        foreach ($Name in $SubSubNode.Name) {
                            $fieldName = $Name
                            $fieldValue = $eventXML.Event.$TopNode.$SubNode.$Name
                            Add-Member -InputObject $Event -MemberType NoteProperty -Name $fieldName -Value $fieldValue -Force
                        }
                        # Case 1
                    } else {
                        # Case 4 - Where Data has no Names
                        $fieldValue = $eventXML.Event.$TopNode.$SubNode
                        if ($fieldValue -match "\n") {
                            # this is case with ADConnect - event id 6946 where 1 Value has multiple values line per line
                            $SplittedValues = $fieldValue -split '\n'
                            foreach ($Split in $SplittedValues) {
                                $h++
                                $fieldName = "NoNameB$h"
                                Add-Member -InputObject $Event -MemberType NoteProperty -Name $fieldName -Value $Split -Force
                            }
                        } else {
                            $h++
                            $fieldName = "NoNameB$h"
                            Add-Member -InputObject $Event -MemberType NoteProperty -Name $fieldName -Value $fieldValue -Force
                        }
                        # Case 4
                    }
                }
            }
            # This adds some fields specific to PSWinReporting
            [string] $MessageSubject = ($Event.Message -split '\n')[0]
            Add-Member -InputObject $Event -MemberType NoteProperty -Name 'MessageSubject' -Value $MessageSubject -Force
            Add-Member -InputObject $Event -MemberType NoteProperty -Name 'Action' -Value $MessageSubject -Force

            # Level value is not needed because there is actually LevelDisplayName
            #Add-Member -InputObject $Event -MemberType NoteProperty -Name 'LevelTranslated' -Value ([PSEventViewer.Level] $Event.Level)

            # Overwrite value - the old value is collection
            Add-Member -InputObject $Event -MemberType NoteProperty -Name 'KeywordDisplayName' -Value ($Event.KeywordsDisplayNames -join ',') -Force

            if ($Event.SubjectDomainName -and $Event.SubjectUserName) {
                Add-Member -InputObject $Event -MemberType NoteProperty -Name 'Who' -Value "$($Event.SubjectDomainName)\$($Event.SubjectUserName)" -Force
            }
            if ($Event.TargetDomainName -and $Event.TargetUserName) {
                Add-Member -InputObject $Event -MemberType NoteProperty -Name 'ObjectAffected' -Value "$($Event.TargetDomainName)\$($Event.TargetUserName)" -Force
            }
            if ($Event.MemberName) {
                [string] $MemberNameWithoutCN = $Event.MemberName -replace 'CN=|\\|,(OU|DC|CN).*$'
                Add-Member -InputObject $Event -MemberType NoteProperty -Name 'MemberNameWithoutCN' -Value $MemberNameWithoutCN -Force
            }
        }
        Write-Verbose "Get-Events - Inside $Comp Time to generate $($Measure.Elapsed.Hours) hours, $($Measure.Elapsed.Minutes) minutes, $($Measure.Elapsed.Seconds) seconds, $($Measure.Elapsed.Milliseconds) milliseconds"
        $Measure.Stop()
        return $Events
    }
    Write-Verbose "Get-Events -------------START---------------------"
    $Data = Get-EventsInternal -Comp $Comp -EventFilter $EventFilter -MaxEvents $MaxEvents -Oldest:$Oldest -Verbose:$Verbose
    if ($EventFilter.Path) {
        $Data | Add-Member -MemberType NoteProperty -Name "GatheredFrom" -Value $EventFilter.Path -Force
    } else {
        $Data | Add-Member -MemberType NoteProperty -Name "GatheredFrom" -Value $Comp -Force
    }
    $Data | Add-Member -MemberType NoteProperty -Name "GatheredLogName" -Value $EventFilter.LogName -Force
    Write-Verbose "Get-Events --------------END----------------------"
    return $Data
}
$Script:ScriptBlockEventsInformation = {
    Param (
        [string]$Computer,
        [string]$Path,
        [string]$LogName,
        [bool] $Verbose
    )
    if ($Verbose) {
        $VerbosePreference = 'continue'
    }
    function Convert-Size {
        # Original - https://techibee.com/powershell/convert-from-any-to-any-bytes-kb-mb-gb-tb-using-powershell/2376
        #
        # Changelog - Modified 30.03.2018 - przemyslaw.klys at evotec.pl
        # - Added $Display Switch
        [cmdletbinding()]
        param(
            [validateset("Bytes", "KB", "MB", "GB", "TB")]
            [string]$From,
            [validateset("Bytes", "KB", "MB", "GB", "TB")]
            [string]$To,
            [Parameter(Mandatory = $true)]
            [double]$Value,
            [int]$Precision = 4,
            [switch]$Display
        )
        switch ($From) {
            "Bytes" {$value = $Value }
            "KB" {$value = $Value * 1024 }
            "MB" {$value = $Value * 1024 * 1024}
            "GB" {$value = $Value * 1024 * 1024 * 1024}
            "TB" {$value = $Value * 1024 * 1024 * 1024 * 1024}
        }

        switch ($To) {
            "Bytes" {return $value}
            "KB" {$Value = $Value / 1KB}
            "MB" {$Value = $Value / 1MB}
            "GB" {$Value = $Value / 1GB}
            "TB" {$Value = $Value / 1TB}

        }
        if ($Display) {
            return "$([Math]::Round($value,$Precision,[MidPointRounding]::AwayFromZero)) $To"
        } else {
            return [Math]::Round($value, $Precision, [MidPointRounding]::AwayFromZero)
        }

    }

    try {
        if ($Computer -eq '') {

            $FileInformation = Get-ChildItem -File $Path
            $EventsOldest = Get-WinEvent -MaxEvents 1 -Oldest -Path $Path -Verbose:$false
            $EventsNewest = Get-WinEvent -MaxEvents 1 -Path $Path -Verbose:$false

            $RecordCount = $EventsNewest.RecordID - $EventsOldest.RecordID

            $EventsInfo = [PSCustomObject]@{
                EventNewest                    = $EventsNewest.TimeCreated
                EventOldest                    = $EventsOldest.TimeCreated
                FileSize                       = $FileInformation.Length
                FileSizeCurrentGB              = Convert-Size -Value $FileInformation.Length -From Bytes -To GB -Precision 2 -Display
                FileSizeMaximumGB              = Convert-Size -Value $FileInformation.Length -From Bytes -To GB -Precision 2 -Display
                IsClassicLog                   = $false
                IsEnabled                      = $false
                IsLogFull                      = $false
                LastAccessTime                 = $FileInformation.LastAccessTime
                LastWriteTime                  = $FileInformation.LastWriteTime
                LogFilePath                    = $Path
                LogIsolation                   = $false
                LogMode                        = 'N/A'
                LogName                        = 'N/A'
                LogType                        = 'N/A'
                MaximumSizeInBytes             = $FileInformation.Length
                MachineName                    = (@($EventsOldest.MachineName) + @($EventsNewest.MachineName) | Sort-Object -Unique) -join ', '
                OldestRecordNumber             = $EventsOldest.RecordID
                OwningProviderName             = ''
                ProviderBufferSize             = 0
                ProviderControlGuid            = ''
                ProviderKeywords               = ''
                ProviderLatency                = 1000
                ProviderLevel                  = ''
                ProviderMaximumNumberOfBuffers = 16
                ProviderMinimumNumberOfBuffers = 0
                ProviderNames                  = ''
                ProviderNamesExpanded          = ''
                RecordCount                    = $RecordCount
                SecurityDescriptor             = ''
                Source                         = 'File'
            }

        } else {
            $EventsInfo = Get-WinEvent -ListLog $LogName -ComputerName $Computer

            $FileSizeCurrentGB = Convert-Size -Value $EventsInfo.FileSize -From Bytes -To GB -Precision 2 -Display
            $FileSizeMaximumGB = Convert-Size -Value $EventsInfo.MaximumSizeInBytes -From Bytes -To GB -Precision 2 -Display
            $EventOldest = (Get-WinEvent -MaxEvents 1 -LogName $LogName -Oldest -ComputerName $Computer).TimeCreated
            $EventNewest = (Get-WinEvent -MaxEvents 1 -LogName $LogName -ComputerName $Computer).TimeCreated
            $ProviderNamesExpanded = $EventsInfo.ProviderNames -join ', '

            Add-Member -InputObject $EventsInfo -MemberType NoteProperty -Name "FileSizeCurrentGB" -Value $FileSizeCurrentGB -Force
            Add-Member -InputObject $EventsInfo -MemberType NoteProperty -Name "FileSizeMaximumGB" -Value $FileSizeMaximumGB -Force
            Add-Member -InputObject $EventsInfo -MemberType NoteProperty -Name "EventOldest" -Value $EventOldest -Force
            Add-Member -InputObject $EventsInfo -MemberType NoteProperty -Name "EventNewest" -Value $EventNewest -Force
            Add-Member -InputObject $EventsInfo -MemberType NoteProperty -Name "ProviderNamesExpanded" -Value $ProviderNamesExpanded -Force
            Add-Member -InputObject $EventsInfo -MemberType NoteProperty -Name "MachineName" -Value $Computer -Force
            Add-Member -InputObject $EventsInfo -MemberType NoteProperty -Name "Source" -Value $Computer -Force
        }
    } catch {
        $ErrorMessage = $_.Exception.Message -replace "`n", " " -replace "`r", " "
        switch ($ErrorMessage) {
            {$_ -match 'No events were found'} {
                Write-Verbose -Message "$Computer Reading Event Log ($LogName) size failed. No events found."
            }
            {$_ -match 'Attempted to perform an unauthorized operation'} {
                Write-Verbose -Message "$Computer Reading Event Log ($LogName) size failed. Unauthorized operation."
                Write-Error -Message "$Computer`: $_"
            }
            default {
                Write-Verbose -Message "$Computer Reading Event Log ($LogName) size failed. Error occured: $ErrorMessage"
                Write-Error -Message "$Computer`: $_"
            }
        }
    }
    $Properties = $EventsInfo.PSObject.Properties.Name | Sort-Object
    $EventsInfo | Select-Object $Properties
}


Export-ModuleMember `
    -Function @('Get-Events','Get-EventsFilter','Get-EventsInformation') `
    -Alias @()