Powershell Compare text and replace if it does not meet specific criteria - powershell

Question

Here is a sample of the csv file I import.
CN,DistinguishedName,extensionattribute7,extensionattribute1
CNPTL73J79ZN1,"CN=CNPTL73J79ZN1,OU=Laptops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",tianyang.li,
USPTD079YZLN1,"CN=USPTD079YZLN1,OU=Desktops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",gary.ortiz,
USPTD07WM53M1,"CN=USPTD07WM53M1,OU=Desktops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",allen.watson,
USPTL7CC1P0P1,"CN=USPTL7CC1P0P1,OU=Laptops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",u0147066,
USPTL77BTZ4R1,"CN=USPTL77BTZ4R1,OU=Laptops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",U0172604,
U0165724-TPL-A,"CN=U0165724-TPL-A,OU=Laptops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",U0165724,167
U0130173-TPL-A,"CN=U0130173-TPL-A,OU=Laptops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",U0130173,167
U0068498-TPL-A,"CN=U0068498-TPL-A,OU=Laptops,OU=Workstations,OU=MSP01,DC=ten,DC=domain,DC=com",u0068498,167
A couple of things I need to do :
Check if the format of CN starts with UXXXXXXX
If it does not, check extensionattribute7 for proper formatted user id of Uxxxxxxx
If that exists, replace the CN with the name of Uxxxxxxx-TPL-ZZZ. the -TPL-ZZZ will be consistent though out all names.
I am totally confused how to search for the Uxxxxxxx but I need something like this, although I know this is completely incorrect.
Import-Csv c:\Temp\Windows7_Only.csv
if ($_CN -NotMatch'[U][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]')
{
Replace the name if extensionattribute7 contains a value of U####### and add the suffix of -TPL-ZZZ
}
Here is my script so far:
#Create an LDAP searcher object and pass in the DN of the domain we wish to query
$Searcher = New-Object System.DirectoryServices.DirectorySearcher([ADSI]"LDAP://DC=ten,DC=domain,DC=com")
#Pass in the ceriteria we are searching for.
$Searcher.Filter = "(&(objectCategory=computer)(objectClass=computer)(!UserAccountControl:1.2.840.113556.1.4.803:=2)(operatingSystem=Windows 7*))"
$Searcher.PageSize = 100000
# Populate General Sheet(1) with information
$results = $Searcher.Findall()
$results | ForEach-Object { $_.GetDirectoryEntry() } |
select #{ n = 'CN'; e = { $_.CN -replace "'", "''" } },
#{ n = 'DistinguishedName'; e = { $_.DistinguishedName -replace "'", "''" } },
#{ n = 'extensionattribute7'; e = { $_.extensionattribute7 -replace "'", "''" } },
#{ n = 'extensionattribute1'; e = { $_.extensionattribute1 -replace "'", "''" } } |
Export-Csv 'C:\temp\Windows7_Only.csv' -NoType -Force
$csv = Import-Csv -Path "c:\Temp\Windows7_Only.csv"
foreach ($row in $csv)
{
if (($row.CN -notmatch '^U\d{7}') -and ($row.DistinguishedName -like "*Laptops*") -and ($row.extensionattribute7 -match '^U\d{7}$'))
{
$row.CN = $row.extensionattribute7 + "-TPL-ZZZ"
}
elseif (($row.CN -notmatch '^U\d{7}') -and ($row.DistinguishedName -like "*Desktops*") -and ($row.extensionattribute7 -match '^U\d{7}$'))
{
$row.CN = $row.extensionattribute7 + "-TPD-ZZZ"
}
$csv | export-csv c:\fixed.csv -Force
}

Answer 1

Good start, though let me say that if you have access to the Active Directory snap-in you should totally use that rather than creating LDAP searchers and what not.
Now, about your comparison... As Matt said your Match should be against $.CN. What that means is $, which represents the current record as it loops through records, and the .CN portion indicates that it should look at the CN property of the record.
Then you can use -Match and (again) like Matt said (he's new here but proving to be knowledgeable), that can be shortened to "U\d{8}".
Now, you actually want to find those that aren't like U\d{8}, so let's precede that with a ! which is an alias for -Not. Then let's check and see if ExtendedAttribute7 is the right thing. So then this looks like:
!$_.CN -like "U\d{8}" -and $_.ExtendedAttribute7 -match "U\d{8}"
Excellent! We have our filter for the rows that need updating. That is pretty much what Alexander did. As for me, I'd go more (using your script as a base):
#Create an LDAP searcher object and pass in the DN of the domain we wish to query
$Searcher = New-Object System.DirectoryServices.DirectorySearcher([ADSI]"LDAP://DC=ten,DC=domain,DC=com")
#Pass in the ceriteria we are searching for.
#In this case we're looking for users with a particular SAM name.
$Searcher.Filter = "(&(objectCategory=computer)(objectClass=computer)(!UserAccountControl:1.2.840.113556.1.4.803:=2)(operatingSystem=Windows 7*))"
$Searcher.PageSize = 100000
# Populate General Sheet(1) with information
$results = $Searcher.Findall()
$Computers = #()
ForEach($Item in $results){
$Comp = $Item.GetDirectoryEntry()
If($Comp.distinguishedName -like "*desktops*"){$Suffix = "TPD-ZZZ"}else{$Suffix = "TPL-ZZZ"}
$CN = If(!$Comp.CN -match "U\d{8}" -and $Comp.extensionattribute7 -match "U\d{8}"){$Comp.extensionattribute7+$Suffix}else{$Comp.CN}
$Computers += [PSCustomObject][Ordered]#{
'CN' = $CN -replace "'", "''"
'DistinguishedName' = $Comp.DistinguishedName[0] -replace "'", "''"
'extensionattribute7' = $Comp.extensionattribute7[0] -replace "'", "''"
'extensionattribute1' = $Comp.extensionattribute1[0] -replace "'", "''"
}
}
$Computers | Export-Csv 'C:\temp\Windows7_Only.csv' -NoType -Force
$Computers

Answer 2

Assuming that I understand your requirements correctly:
$csv = Import-Csv -Path "c:\Temp\Windows7_Only.csv"
foreach ($row in $csv) {
if ($row.DistinguishedName -like "*Desktops*") {
$suffix = "-TPD-ZZZ"
}
elseif ($row.DistinguishedName -like "*Laptops*") {
$suffix = "-TPL-ZZZ"
}
if ( ($row.CN -notmatch '^U\d{7}') `
-and ($row.extensionattribute7 -match '^U\d{7}$') ) {
$row.CN = $row.extensionattribute7 + $suffix
}
}
$csv | export-csv c:\fixed.csv -Force -NoTypeInformation