Powershell to zip folder & files, then delete old files - powershell

Question

I want to use Powershell to automate the:
1. compression of log files (.xml and .dat extensions) older than 7 days,
2. copy these compressed archives elsewhere and
3. then delete the raw log files from source.
I am using the following Powershell script which I pieced together from various resources.
function New-Zip
{
param([string]$zipfilename)
set-content $zipfilename ("PK" + [char]5 + [char]6 + ("$([char]0)" * 18))
(dir $zipfilename).IsReadOnly = $false
}
function Add-Zip
{
param([string]$zipfilename)
if(-not (test-path($zipfilename)))
{
set-content $zipfilename ("PK" + [char]5 + [char]6 + ("$([char]0)" * 18))
(dir $zipfilename).IsReadOnly = $false
}
$shellApplication = new-object -com shell.application
$zipPackage = $shellApplication.NameSpace($zipfilename)
foreach($file in $input)
{
$zipPackage.CopyHere($file.FullName)
Start-sleep -milliseconds 500
}
}
$targetFolder = 'C:\source'
$destinationFolder = 'D:\destination\'
$now = Get-Date
$days = 7
$lastWrite = $now.AddDays(-$days)
Get-ChildItem $targetFolder -Recurse | Where-Object { $_ -is [System.IO.FileInfo] } | ForEach-Object {
If ($_.LastWriteTime -lt $lastWrite)
{
$_ | New-Zip $($destinationFolder + $_.BaseName + ".zip")
$_ | Add-Zip $($destinationFolder + $_.BaseName + ".zip")
}
}
Get-ChildItem $targetFolder -Recurse -Include "*.dat", "*.xml" | WHERE {($_.CreationTime -le $(Get-Date).AddDays(-$days))} | Remove-Item -Force
This script does work reasonably well, as it archives only the files, and copies them on destination folder.
If I have a structure of C:\source\bigfolder\logfile.dat, the resulting zip file will not get the folder structure as I would like:
logfile.zip>bigfolder>logfile.dat
Instead, it just gets: logfile.zip>logfile.dat
Can someone help in figuring this out ?
To fine tune it even better, I would like if possible to build some logic, so the files are compressed only when a specific criteria is met.
The raw log files that I compress have a naming routine as following:
Folders:
emstg#12_list\randomstring.xml
Individual log files:
emstg#12_query_data.xml
emstg#12_events_cache.dat etc...
As you may see the start of these files is same with emstg#number.
How to implement a "name-detection" mechanism in script above ?
Thanks

Answer 1

you could zip a folder by using [System.IO.Compression]
I wrote this based on your script.
My idea is to copy the whole folder structure of the file you need to compress into a temp folder and then zip that temp folder.
For the name-detection, you just need another where-object (modify the code as you want)
function Zip
{
param(
[string]$source,
[string]$des
)
add-type -AssemblyName System.IO.Compression.FileSystem
[System.IO.Compression.ZipFile]::CreateFromDirectory($source,$des,'Optimal',$true)
Start-sleep -s 1
}
$targetFolder = "C:\source"
$destinationFolder = "C:\destination"
$temp = "C:\temp"
$now = Get-Date
$days = 7
$lastWrite = $now.AddDays(-$days)
$i = 1
Get-ChildItem $targetFolder -Recurse | Where-Object { $_ -is [System.IO.FileInfo] } | Where-Object {$_ -like "*.*"} | ForEach-Object {
If ($_.LastWriteTime -lt $lastWrite) {
$halfDir = $_.DirectoryName.Trim($targetFolder)
$s = $temp + "\" + $i + "\" + $halfDir
$d = $destinationFolder + "\" + $_.BaseName + ".zip"
Copy-Item $_.DirectoryName -Destination $s
Copy-Item $_.FullName -Destination $s
Zip -source $s -des $d
$i++
}
}