Powershell add null content and not null content to one CSV - powershell

Question

I need to include 'Installed' and 'Not Installed' data in one CSV
I think I need to incorporate an -OR logical operator to include TRUE/FALSE
output in one CSV. Idk how to do that yet.
There's a folder with many *ServerData files that contain a list of KBs with
possible duplicate KBs.
There is a *ServerData file for each server, with possible duplicate files.
I want to test whether any of them contain KB2151757 and KB4556403.
Then output the results to a csv with a status of either Installed or Not
Installed.
Currently it only returns a list of computers with the KB installed.
If the $patch is not found, it currently returns nothing (null).
For each $computer searched, it needs to return the specified fields for the
[PSCustomObject]
I'm thinking that maybe I just need to take a function to find 'installed' and a function to find 'not installed' and add the results together to export. Idk how to do that. I feel like there must be an easier way.
Click to view a sample of the CSV
$computers = Get-Item -path F:\*ServerData | Select-Object -ExpandProperty basename
$patch = gc -path F:\*ServerData | Sort-Object -Unique | Select-String KB2151757, KB4556403 #'KB(\d+)'
$output = ForEach ($computer in $computers) {
ForEach ($kb in $patch) {
if ($null -eq $patch){
[PSCustomObject]#{
Status = 'Not Installed'
Server = $computer
KB = $kb
}
} else{
[PSCustomObject]#{
Status = 'Installed'
Server = $computer
KB = $kb
}
}
}
}
$output | Export-csv C:\KB-Report.txt -notypeinformation -delimiter ',' -encoding utf8

Answer 1

If you start by grouping the files by the associated computer name, then the procedure becomes straightforward (pseudocode):
for each Computer
for each ExpectedPatch
if ServerData for Computer contains ExpectedPatch
Output object with 'Installed' status for ExpectedPatch on Computer
else
Output object with 'NotInstalled' status for ExpectedPatch on Computer
So let's give that a try:
# Define the articles we're looking for
$ExpectedPatches = 'KB2151757', 'KB4556403'
# Enumerate and group data files by computer name, output as hashtable
# The resulting hashtable will have the computer name is Name and the associated files as its value
$ServerDataPerComputer = Get-Item -Path F:\*ServerData |Group BaseName -AsHashtable
foreach($Computer in $ServerDataPerComputer.GetEnumerator())
{
foreach($Patch in $ExpectedPatches)
{
# Pipe all the file references to Select-String, look for the KB ID, return after the first match if any
$Status = if($Computer.Value |Select-String "\b$Patch\b" |Select-Object -First 1){
'Installed'
}
else {
# Select-String didn't find the KB ID in any of the files
'NotInstalled'
}
[pscustomobject]#{
Status = $Status
Server = $Computer.Name
KB = $Patch
}
}
}