private/Get-LastLogEntry.ps1
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function Get-LastLogEntry { <# .SYNOPSIS Get text from log file that matches the specified pattern .DESCRIPTION Returns a line of text or part of it from CBB log file that matches the specified RegEx pattern. .PARAMETER FullPathToLog Full path to log file .PARAMETER Pattern RegEx pattern to search for in log file (case sensitive). .PARAMETER ReturnMatchGroup Index number that corresponds to a match group in the RegEx pattern. The function will return only the part of the line, that is in the specified match group. .EXAMPLE Get-LastLogEntry -FullPathToLog "C:\ProgramData\Online Backup\Logs\af8928ca-5934-4848-b8b1-159486fb58f0.log" -Pattern "^(.*)NOTICE - Plan: (.*). Type: (.*). Start mode: (.*)$" -ReturnMatchGroup 4 .INPUTS None .OUTPUTS System.String .NOTES Author: Andrew Anushin .LINK #> [cmdletbinding()] param( [parameter(Mandatory=$true)] [string]$FullPathToLog, [parameter(Mandatory=$true)] [string]$Pattern, [parameter(Mandatory=$false)] [int]$ReturnMatchGroup = 0 ) begin { } process { if (Test-Path -Path $FullPathToLog -PathType leaf) { Write-Verbose "$($PSCmdlet.MyInvocation.MyCommand.Name): Log file $FullPathToLog exists." $LogContent = Get-Content -Path $FullPathToLog $i = 0 do { $i = $i + 1 $MatchFound = $($LogContent[-$i] -cmatch $Pattern) } until (($MatchFound) -or ($i -eq $LogContent.Count)) if ($MatchFound) { Write-Verbose "$($PSCmdlet.MyInvocation.MyCommand.Name): Found line matching rexeg expression. Line:$($LogContent.Count - $i + 1)" $result = $Matches[$ReturnMatchGroup] } else { Write-Verbose "$($PSCmdlet.MyInvocation.MyCommand.Name): No lines matching regex pattern found. Checked $i lines." $result = "" } } else { Write-Verbose "$($PSCmdlet.MyInvocation.MyCommand.Name): Log file $FullPathToLog not found." $result = "" } } end { return $result } } |