code_review_rename_computer_and_join_ad_on_first

# https://www.reddit.com/r/PowerShell/comments/4es9ll/code_review_rename_computer_and_join_ad_on_first/

# Get Campus Code, $CampusCode
$CampusCode = Read-Host 'Input campus code: (01)'
if ($CampusCode -eq $null -or $CampusCode -eq '') { $CampusCode = '01' }

# Get Building Number, $BuildingNumber
$BuildingNumber = Read-Host 'Input building number: (01)'
if ($BuildingNumber -eq $null -or $BuildingNumber -eq '') { $BuildingNumber = '01' }

# Get Computer Code, $ComputerCode
$ComputerCode = Read-Host 'Input computer code: (01)'
if ($ComputerCode -eq $null -or $ComputerCode -eq '') { $ComputerCode = '01' }

# Get Last 6 characters of Mac Address, $MacLast6
$MacLast6 = ''
try {
    $MacLast6 = ((Get-NetAdapter -Name 'Local Area Connection').MacAddress -replace '-').Substring(6)
} catch {
    $Confirmation = ''
    while ($Confirmation.ToUpper() -ne 'Y') {
        $MacLast6 = Read-Host 'Error detecting Mac Address, input last 6 characters manually:'
        $Confirmation = Read-Host "Is this the correct last 6 characters of the Mac Address? '$MacLast6' [Y]/n"
        if ($Confirmation -eq $null -or $Confirmation -eq '') { $Confirmation = 'Y' }
    }
}

# Generate Computer Name, $NewName
$NewName = 'newnamegeneratedhere'

$Confirmation = ''
while ($Confirmation.ToUpper() -ne 'Y') {
    # Prompt for confirmation, $Confirmation
    $Confirmation = Read-Host "Set computer name to '$NewName'? [Y]/n"
    if ($Confirmation -eq $null -or $Confirmation -eq '') { $Confirmation = 'Y' }
}

try {
    #code removed for safety
} catch {
    #code removed for safety
}

# Setting 'rootuserhere' password
Write-Host "Setting root administrator password to '$NewPassword'."

try {
    ([adsi]'WinNT://./Administrator').SetPassword($NewPassword)
    $admin = [adsi]'WinNT://./Administrator,user'
    $admin.psbase.Rename('rootuserhere')
} catch {
    Write-Error 'Error setting administrator username and/or password!'
}

# Ask for join or just restart
$Confirmation = ''
$Confirmation = Read-Host 'Would you like join the domain after renaming the computer? [Y]/n'
if ($Confirmation -eq $null -or $Confirmation -eq '') { $Confirmation = 'Y' }

if ($Confirmation.ToUpper() -eq 'Y') {
    Add-Computer -Domain ad.contoso.com -NewName $NewName -Credential $(Get-Credential -Message 'Input credentials for Active Directory (ad.contoso.com).') -Restart
} else {
    Rename-Computer -NewName $NewName
    Restart-Computer -Force
}