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##############################################################################
#
# Twingle - Update the Updates list
#
##############################################################################
$env:PSModulePath = $env:PSModulePath + ";c:\twingle\lib";
Import-Module twingle; $ini = Parse_IniFile; $twingleDir = twingledir
logging start twingle_update
##############################################################################

$updateCacheFile = getconfig cachefile
$updateCacheFile = "$twingledir\$updateCacheFile"
$updateCacheExpireHours = getconfig updateCacheExpireHours

if (-not (Test-Path $updateCacheFile)) {
log "Cache file not found, going to do update."
$updateRequired = 1
}
elseif ((Get-Date) -gt ((Get-Item $updateCacheFile).LastWriteTime.AddHours($updateCacheExpireHours))) {
log "Cache file too old, going to do update."
    $updateRequired = 1
}

if ($updateRequired) {
#actually update things

log "Getting a current list of updates from Windows Update..."
$updateSession = new-object -com "Microsoft.Update.Session"
$availableUpdates=$updateSession.CreateupdateSearcher().Search(("IsInstalled=0 and Type='Software'")).Updates
log "... complete."

# establish what updates we actually want.
$updateList = new-object -com "Microsoft.Update.UpdateColl"
foreach ($update in $availableUpdates) {
#keep critical updates
if (($update.AutoSelectOnWebSites)) {
$surpress = $updateList.Add($update)
}
else {
if ((getConfig installOptionalUpdates) -eq 1) {
$surpress = $updateList.Add($update)
}
}
}

Export-Clixml -InputObject $updateList -Path $updateCacheFile

foreach ($up in $updateList) {
if ($up.isDownloaded) { $downstatus = "Already downloaded" } else { $downstatus = "needs to be downloaded"}
log ("Pending update: KB"+($up.KBarticleIDs)+" : $downstatus")
}
} else {
log "x Cache file doesn't need to be updated"
}


logging end twingle_update
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