New-Team Class Notebook Workflow.ps1

$removeExcess = $false

$count = $sets.Count
$i = 0
foreach($set in $filteredSets){
    $percent = $i * 100 / $count
    $i += 1
    $teamName = $set.SetCode + " " + $year
    Write-Progress -Activity "Creating Team" -Status "$percent% Complete | working on $teamName)" -PercentComplete $percent
    $ProgressPreference = "SilentlyContinue"
    $team = $existingTeams | Where-Object {$_.DisplayName -eq $teamName}
    $ProgressPreference = "Continue"
    if($null -eq $team){
        New-Team -Template EDU_Class -DisplayName $teamName > $null # This may be a good place to set Owner??  -Owner $set.Teachers 
        Write-Host "Creating Team: $teamName N.B (run script again to populate)"
    }
    else{
        Write-Host "Team Already Exists: $teamName"
        if($team -is [array]){
            Write-Warning "`$team is an array skip this pass and investigate $([string]::Join(', ' ,$team.DisplayName))"

        }
        else{
            #Clearing A Team of users
            $teamMembers = Get-TeamUser -GroupId $team.GroupId
            [System.Collections.Generic.HashSet[string]]$existingMembers = $teamMembers | Where-Object {$_.Role -eq "member"} | ForEach-Object {$_.User.ToLower()}
            if ($null -eq $existingMembers) {
                $existingMembers = [System.Collections.Generic.HashSet[string]]::new()
            }

            [System.Collections.Generic.HashSet[string]]$existingOwners = $teamMembers | Where-Object {$_.Role -eq "owner"} | ForEach-Object {$_.User.ToLower()}
            if ($null -eq $existingOwners) {
                $existingMembers = [System.Collections.Generic.HashSet[string]]::new()
            }

            [System.Collections.Generic.HashSet[string]]$incomingMembers = $set.Pupils.EmailAddress.ToLower()
            if ($null -eq $incomingMembers) {
                $existingMembers = [System.Collections.Generic.HashSet[string]]::new()
            }
            
            $toRemove = [System.Collections.Generic.HashSet[string]]::new($existingMembers) 
            $toRemove.ExceptWith($incomingMembers)
            $toCreate = [System.Collections.Generic.HashSet[string]]::new($incomingMembers)
            $toCreate.ExceptWith($existingMembers)
            
            if($removeExcess -and $toRemove.Count -gt 0){
                
                foreach($user in $toRemove){
                        if($user -like "System.Collections.Generic.HashSet[string] new()*"){ Write-Error "inspect" -ErrorAction Stop}
                        Write-Host ("`t Clearing: " + $user)
                        Remove-TeamUser -GroupId $team.GroupId -User $user
                }
            }

            foreach($p in $toCreate){
                    Write-Host ("`t Adding Member: " + $p)
                    Add-TeamUser -GroupId $team.GroupId -User $p -Role "Member"
            }

            foreach($t in $set.Teachers){
                if($null -eq $t){continue}
                if(-not $existingOwners.Remove($t.ToLower())){
                    Write-Host "`t Adding Owner: $t"
                    Add-TeamUser -GroupId $team.GroupId -User $t -Role "Owner"
                }
                $existingOwners.Remove("me@domain.com") > $null
                if($existingOwners.Count -gt 0){
                    Write-Warning ("`t Check Owners of $teamName`: " + [string]::Join(', ' , $existingOwners ))
                    foreach($user in $existingOwners){
                       Write-Host ("`t Clearing: " + $user)
                       Remove-TeamUser -GroupId $team.GroupId -User $user
                    }
                }

            }
        }
    }
}
Write-Progress -Activity "Creating Team" -Status "Complete" -Completed