Group systems by operating system

################################################################################
# This script requires the JumpCloud PowerShell Module to run. Specifically, the
# JumpCloud PowerShell SDK Modules are required to run the system queries. To
# install the PowerShell Modules, enter the following line in a PWSH terminal:
# Install-Module JumpCloud
#
# This script will search for systems and add them to system groups if they are
# not currently members of that group. It is intended to group systems by OS.
#
# This script can be run multiple times. As systems are added to JumpCloud, they
# will then be added to the defined system groups.
################################################################################

# Group Names
$MacGroupName = "AutoGroup-Mac"
$WindowsGroupName = "AutoGroup-Windows"
$LinuxGroupName = "AutoGroup-Linux"
$Groups = @($MacGroupName, $WindowsGroupName, $LinuxGroupName)

################################################################################
$allSystemGroups = Get-JcSdkSystemGroup
foreach ($Group in $Groups) {
    # Create groups if they do no exist
    if (!($allSystemGroups.Name -match $Group)) {
        # Create group
        New-JcSdkSystemGroup -Name $Group
    }
}
# Get Group ID & Group Membership for each group
$MacGroup = Get-JCGroup -Type System -Name $MacGroupName
$MacGroupMembers = Get-JCSystemGroupMember -ById $MacGroup.id
$WindowsGroup = Get-JCGroup -Type System -Name $WindowsGroupName
$WindowsGroupMembers = Get-JCSystemGroupMember -ById $WindowsGroup.id
$LinuxGroup = Get-JCGroup -Type System -Name $LinuxGroupName
$LinuxGroupMembers = Get-JCSystemGroupMember -ById $LinuxGroup.id

# query systems
$allSystems = Get-JcSdkSystem
foreach ($system in $allSystems) {
    # Get App List for each system
    if ($system.OS -eq 'Windows'){
        if (!($($WindowsGroupMembers.to.id) -match $($system.id))){
            Write-host "Adding $($system.hostname) to group $WindowsGroupName"
            Set-JcSdkSystemGroupMember -Id $($system.id) -Op add -GroupId $($WindowsGroup.id)
        }
    }
    elseif ($system.OS -eq 'Mac OS X'){
        if (!($($MacGroupMembers.to.id) -match $($system.id))){
            Write-host "Adding $($system.hostname) to group $MacGroupName"
            Set-JcSdkSystemGroupMember -Id $($system.id) -Op add -GroupId $($MacGroup.id)
        }
    }
    elseif ($system.OS -eq 'Ubuntu'){
        if (!($($LinuxGroupMembers.to.id) -match $($system.id))) {
            Write-host "Adding $($system.hostname) to group $LinuxGroupName"
            Set-JcSdkSystemGroupMember -Id $($system.id) -Op add -GroupId $($LinuxGroup.id)
        }

    }
}