LogArchive.ps1

#Requires -Version 3.0

<#
.SYNOPSIS
    Log Archiver for Windows
.DESCRIPTION
    This script can be used to archive old log files
.PARAMETER Path
    The path to the directory with log files.
.PARAMETER ArchiveDays
    The number of days from now, to archive files.
.PARAMETER DeleteDays
    The number of days from now, to delete files.
.PARAMETER Filter
    An optional filter for log files
.EXAMPLE
    PS >.\LogArchive.ps1 -Path "D:\Logs\" -ArchiveDays 30 -DeleteDays 90 -Filter "*.log"
.EXAMPLE
    PS >C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -Command "C:\Scripts\LogArchive.ps1" "-Path C:\inetpub\logs\LogFiles\W3SVC1\ -ArchiveDays 60 -DeleteDays 180 -Filter "*.log""
    Use this example in the Task Scheduler
.LINK
    None
.NOTES
    Author: skunkie
    Last modified: 19/01/2015
    Requires -Version 3.0
#>
[CmdletBinding()]
param(
    [Parameter(Position=0, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true, Mandatory=$true)]
    [String[]]$Path,
    [Parameter(Position=1, Mandatory=$true)] [System.Int32]$ArchiveDays,
    [Parameter(Position=2, Mandatory=$true)] [System.Int32]$DeleteDays,
    [Parameter(Position=3, Mandatory=$false)][System.String]$Filter
)

Set-StrictMode -Version Latest

# Set the preference of Error Action
$ErrorActionPreference = 'Stop'

if ($DeleteDays -le $ArchiveDays) {
    throw "DeleteDays is less than or equal to ArchiveDays"
}
$archDays = (Get-Date).AddDays(-$ArchiveDays)
$delDays  = (Get-Date).AddDays(-$DeleteDays)
$files = $null
$delFiles = $null

$files = Get-ChildItem -File -Path $Path -Filter $Filter | Where-Object {$_.LastWriteTime -lt $archDays}

foreach ($file in $files) {
    $fileFullName = $file.FullName
    if ($file.LastWriteTime -lt $archDays -and -not $fileFullName.ToLower().EndsWith('.zip')) {
        $zipFileFullName = "{0}.zip" -f $fileFullName
        Set-Content -Path $zipFileFullName('PK' + [char]5 + [char]6 + ("$([char]0)" * 18))
        (Get-ChildItem -Path $zipFileFullName).IsReadOnly = $false
        $shellApplication = New-Object -ComObject Shell.Application
        $zipPackage = $shellApplication.NameSpace($zipFileFullName)
        $zipPackage.CopyHere($fileFullName)
        do {
            Start-Sleep -Milliseconds 250 }
        while ($zipPackage.Items().Count -eq 0)

        $zipFile = Get-ChildItem -File -Path $zipFileFullName
        $zipFile.LastWriteTime = $file.LastWriteTime
    } elseif ($file.LastWriteTime -gt $delDays) {
        continue
    }
    Remove-Item -Path $fileFullName
}