functions/Export-DbaXECsv.ps1

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#ValidationTags#Messaging,FlowControl,Pipeline,CodeStyle#
function Export-DbaXECsv {
<#
    .SYNOPSIS
        Exports Extended Events to a CSV file.
 
    .DESCRIPTION
        Exports Extended Events to a CSV file.
 
    .PARAMETER Path
        Specifies the InputObject to the output CSV file
 
    .PARAMETER EnableException
        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
        This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
        Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
    .PARAMETER InputObject
        Allows Piping
 
    .NOTES
        Tags: ExtendedEvent, XE, XEvent
        Author: Gianluca Sartori (@spaghettidba)
 
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
    .LINK
        https://dbatools.io/Export-DbaXECsv
 
    .EXAMPLE
        PS C:\> Get-ChildItem -Path C:\temp\sample.xel | Export-DbaXECsv -Path c:\temp\sample.csv
 
        Writes Extended Events data to the file "C:\temp\events.csv".
 
    .EXAMPLE
        PS C:\> Get-DbaXESession -SqlInstance sql2014 -Session deadlocks | Export-DbaXECsv -Path c:\temp\events.csv
 
        Writes Extended Events data to the file "C:\temp\events.csv".
 
#>

    [CmdletBinding()]
    param (
        [parameter(Mandatory, ValueFromPipeline)]
        [Alias('FullName')]
        [object[]]$InputObject,
        [parameter(Mandatory)]
        [string]$Path,
        [switch]$EnableException
    )
    begin {
        try {
            Add-Type -Path "$script:PSModuleRoot\bin\XESmartTarget\XESmartTarget.Core.dll" -ErrorAction Stop
        }
        catch {
            Stop-Function -Message "Could not load XESmartTarget.Core.dll" -ErrorRecord $_ -Target "XESmartTarget"
            return
        }

        function Get-FileFromXE ($InputObject) {
            if ($InputObject.TargetFile) {
                if ($InputObject.TargetFile.Length -eq 0) {
                    Stop-Function -Message "This session does not have an associated Target File."
                    return
                }

                $instance = [dbainstance]$InputObject.ComputerName

                if ($instance.IsLocalHost) {
                    $xelpath = $InputObject.TargetFile
                }
                else {
                    $xelpath = $InputObject.RemoteTargetFile
                }

                if ($xelpath -notmatch ".xel") {
                    $xelpath = "$xelpath*.xel"
                }

                try {
                    Get-ChildItem -Path $xelpath -ErrorAction Stop
                }
                catch {
                    Stop-Function -Message "Failure" -ErrorRecord $_
                }
            }
        }
    }
    process {
        if (Test-FunctionInterrupt) { return }

        $getfiles = Get-FileFromXE $InputObject

        if ($getfiles) {
            $InputObject += $getfiles
        }

        foreach ($file in $InputObject) {
            if ($file -is [System.String]) {
                $currentfile = $file
            }
            elseif ($file -is [System.IO.FileInfo]) {
                $currentfile = $file.FullName
            }
            elseif ($file -is [Microsoft.SqlServer.Management.XEvent.Session]) {
                # it was taken care of above
                continue
            }
            else {
                Stop-Function -Message "Unsupported file type."
                return
            }

            $accessible = Test-Path -Path $currentfile
            $whoami = whoami

            if (-not $accessible) {
                if ($file.Status -eq "Stopped") { continue }
                Stop-Function -Continue -Message "$currentfile cannot be accessed from $($env:COMPUTERNAME). Does $whoami have access?"
            }

            if (-not (Test-Path $Path)) {
                if ([String]::IsNullOrEmpty([IO.Path]::GetExtension($Path))) {
                    New-Item $Path -ItemType directory | Out-Null
                    $outDir = $Path
                    $outFile = [IO.Path]::GetFileNameWithoutExtension($currentfile) + ".csv"
                }
                else {
                    $outDir = [IO.Path]::GetDirectoryName($Path)
                    $outFile = [IO.Path]::GetFileName($Path)
                }
            }
            else {
                if ((Get-Item $Path) -is [System.IO.DirectoryInfo]) {
                    $outDir = $Path
                    $outFile = [IO.Path]::GetFileNameWithoutExtension($currentfile) + ".csv"
                }
                else {
                    $outDir = [IO.Path]::GetDirectoryName($Path)
                    $outFile = [IO.Path]::GetFileName($Path)
                }
            }

            $adapter = New-Object XESmartTarget.Core.Utils.XELFileCSVAdapter
            $adapter.InputFile = $currentfile
            $adapter.OutputFile = (Join-Path $outDir $outFile)

            try {
                $adapter.Convert()
                $file = Get-ChildItem -Path $adapter.OutputFile

                if ($file.Length -eq 0) {
                    Remove-Item -Path $adapter.OutputFile
                }
                else {
                    $file
                }
            }
            catch {
                Stop-Function -Message "Failure" -ErrorRecord $_ -Target "XESmartTarget" -Continue
            }
        }
    }
}