Param(
    [string]$pathToPackages
)

Add-Type -AssemblyName System.IO.Compression.FileSystem
function Unzip
{
    param([string]$zipfile, [string]$outpath)

    [System.IO.Compression.ZipFile]::ExtractToDirectory($zipfile, $outpath)
}
function ZipDirectory
{
	param([string]$zipfilename, [string]$sourcedir)

	$compressionLevel = [System.IO.Compression.CompressionLevel]::Optimal
	[System.IO.Compression.ZipFile]::CreateFromDirectory($sourcedir, $zipfilename, $compressionLevel, $false)
}
function RemoveBinFiles
{
	param([string]$path, [string]$updateFile)

	$packageNameOnly = "$($path)\$($updateFile)"
	$package = "$($packageNameOnly).update"
	$packageDirectory = "$($path)\package"
	$packageZip = "$($packageDirectory).zip"
	$packageBin = "$($packageDirectory)\addedFiles\bin"
	$packagePropertiesBin = "$($packageDirectory)\properties\addedFiles\bin"

	Unzip $package $path

	if (Test-Path $packageDirectory) {
	  Remove-Item $packageDirectory -recurse
	}

	Unzip $packageZip $packageDirectory

	Remove-Item $packageZip

	if (Test-Path $packageBin) {
	  Remove-Item $packageBin -recurse
	}

	if (Test-Path $packagePropertiesBin) {
	  Remove-Item $packagePropertiesBin -recurse
	}

	ZipDirectory $packageZip $packageDirectory

	if (Test-Path $packageDirectory) {
	  Remove-Item $packageDirectory -recurse
	}

	if (Test-Path $package) {
	  Remove-Item $package
	}

	New-Item -ItemType directory -Path $packageNameOnly

	Move-Item -Path $packageZip -Destination $packageNameOnly

	ZipDirectory $package $packageNameOnly

	if (Test-Path $packageNameOnly) {
	  Remove-Item $packageNameOnly -recurse
	}
}

Get-ChildItem $pathToPackages -Filter *.update |
Foreach-Object {
	$packageName = $_.BaseName
    Write-Host $packageName
    RemoveBinFiles $pathToPackages $packageName
}