Powershell: Re-Install Printer depending on Username - powershell

Question

I'm trying to learn Powershell and have no experience in any script language at all (well, except Batch a bit).
What I'm trying to do is to run this Batch command -> IF "%USERNAME%"=="Admin" GOTO Admin as a Powershell command and afterwards reinstall the users Default printer. The reason why I Need a goto is because I want to use the same script for several Users. This is what I have so far as a Batch/Powershell Hybrid
IF "%USERNAME%"=="Admin" GOTO Admin
:Admin
powershell
(New-Object -ComObject WScript.Network).RemovePrinterConnection("\\Server\adprinter")
(New-Object -ComObject WScript.Network).AddWindowsPrinterConnection("\\Server\adprinter")
$printer = Get-WmiObject -Query "Select * from Win32_Printer Where ShareName = 'adprinter'"
$printer.SetDefaultPrinter()
exit
GOTO eof
I'd like to do the whole Thing in powershell but I just don't get it. I read that you can do a "goto" in powershell with a if-loop. for example that's what I have
$user = [Environment]::UserName
if ($user = Admin) do {""}
But how do I run my commands now? and how do I do another Loop for other usernames?
Thank you for your help!
EDIT:
Here is the whole script I have so far. I Need a "goto" because I have more than one User, and each of them Needs his own Printer. It would be nice to transform every Batch command into a powershell command.
#echo off
IF "%USERNAME%"=="user1" GOTO user1
IF "%USERNAME%"=="user2" GOTO user2
IF "%USERNAME%"=="user3" GOTO user3
IF "%USERNAME%"=="user4" GOTO user4
IF "%USERNAME%"=="user5" GOTO user5
:user1
powershell
(New-Object -ComObject WScript.Network).RemovePrinterConnection("\\Server\printer1")
(New-Object -ComObject WScript.Network).AddWindowsPrinterConnection("\\Server\printer1")
$printer = Get-WmiObject -Query "Select * from Win32_Printer Where ShareName = 'printer1'"
$printer.SetDefaultPrinter()
exit
GOTO eof
:user2
powershell
(New-Object -ComObject WScript.Network).RemovePrinterConnection("\\Server\printer2")
(New-Object -ComObject WScript.Network).AddWindowsPrinterConnection("\\Server\printer2")
$printer = Get-WmiObject -Query "Select * from Win32_Printer Where ShareName = 'printer2'"
$printer.SetDefaultPrinter()
exit
GOTO eof
:user3
powershell
(New-Object -ComObject WScript.Network).RemovePrinterConnection("\\Server\printer3")
(New-Object -ComObject WScript.Network).AddWindowsPrinterConnection("\\Server\printer3")
$printer = Get-WmiObject -Query "Select * from Win32_Printer Where ShareName = 'printer3'"
$printer.SetDefaultPrinter()
exit
GOTO eof
:user4
powershell
(New-Object -ComObject WScript.Network).RemovePrinterConnection("\\Server\printer4")
(New-Object -ComObject WScript.Network).AddWindowsPrinterConnection("\\Server\printer4")
$printer = Get-WmiObject -Query "Select * from Win32_Printer Where ShareName = 'printer4'"
$printer.SetDefaultPrinter()
exit
GOTO eof
:user5
powershell
(New-Object -ComObject WScript.Network).RemovePrinterConnection("\\Server\printer5")
(New-Object -ComObject WScript.Network).AddWindowsPrinterConnection("\\Server\printer5")
$printer = Get-WmiObject -Query "Select * from Win32_Printer Where ShareName = 'printer5'"
$printer.SetDefaultPrinter()
exit
GOTO eof
:eof
exit

Answer 1

I agree with arco I like the use of HashTables and your issue is perfect for it. Take a look at my code here it should give you a good point for a Powershell Start.
$drac = #{ }
Import-Csv \\RemoteServer\Share\Folder\Powershell-scripts\Connect-rac.CSV | ForEach-Object {
$drac[$_.ServerName] = $_.IMM
}
If you look at the above this is what takes my CSV file and loads it into the hashtable
and below if how my code is used, I make it look for the computer name and if the matches then it will return the hashtable value.
if ($drac.Contains($ComputerName))
{
Write-Host "Servername : $ComputerName"
$URL = $drac[$ComputerName]
$IE = New-Object -COM 'InternetExplorer.Application'
$IE.Navigate2("http:\\$URL")
$IE.Visible = $true
}
See if this helps you.