functions/administrativeUnits/Test-TmfAdministrativeUnit.ps1

function Test-TmfAdministrativeUnit
{
    [CmdletBinding()]
    Param (
        [System.Management.Automation.PSCmdlet]
        $Cmdlet = $PSCmdlet
    )
    begin
    {
        Test-GraphConnection -Cmdlet $Cmdlet
        $componentName = "administrativeUnits"
        $tenant = Get-MgOrganization -Property displayName, Id        
    }
    process
    {
        foreach ($definition in $script:desiredConfiguration[$componentName]) {
            foreach ($property in $definition.Properties()) {
                if ($definition.$property.GetType().Name -eq "String") {
                    $definition.$property = Resolve-String -Text $definition.$property
                }
            }

            $result = @{
                Tenant = $tenant.displayName
                TenantId = $tenant.Id
                ResourceType = 'administrativeUnits'
                ResourceName = (Resolve-String -Text $definition.displayName)
                DesiredConfiguration = $definition
            }

            if ("oldNames" -in $definition.Properties()) {                
                $filter = ($definition.oldNames + $definition.displayName | Foreach-Object {
                    "(displayName eq '{0}')" -f [System.Web.HttpUtility]::UrlEncode($_)
                }) -join " or "
            }
            else {
                $filter = "(displayName eq '{0}')" -f [System.Web.HttpUtility]::UrlEncode($definition.displayName)
            }
            try {
                $resource = (Invoke-MgGraphRequest -Method GET -Uri ("$script:graphBaseUrl/administrativeUnits/?`$filter={0}" -f $filter)).Value            
            }
            catch {
                Write-PSFMessage -Level Warning -String 'TMF.Error.QueryWithFilterFailed' -StringValues $filter -Tag 'failed'
                $exception = New-Object System.Data.DataException("Query with filter $filter against Microsoft Graph failed. Error: $_")
                $errorID = 'QueryWithFilterFailed'
                $category = [System.Management.Automation.ErrorCategory]::NotSpecified
                $recordObject = New-Object System.Management.Automation.ErrorRecord($exception, $errorID, $category, $Cmdlet)
                $cmdlet.ThrowTerminatingError($recordObject)
            }            

            switch ($resource.Count) {
                0 {
                    if ($definition.present) {                    
                        $result = New-TestResult @result -ActionType "Create"
                    }
                    else {                    
                        $result = New-TestResult @result -ActionType "NoActionRequired"
                    }
                }
                1 {
                    $result["GraphResource"] = $resource
                    if ($definition.present) {
                        $changes = @()
                        foreach ($property in ($definition.Properties() | Where-Object {$_ -notin "oldNames", "present", "sourceConfig"})) {
                            $change = [PSCustomObject] @{
                                Property = $property
                                Actions = $null
                            }
                            switch ($property) {
                                "members" {
                                    $resourceMembers = (Invoke-MgGraphRequest -Method GET -Uri ("$script:graphBaseUrl/administrativeUnits/{0}/members/$/microsoft.graph.user" -f $resource.Id)).Value.Id;
                                    $change.Actions = Compare-ResourceList -ReferenceList $resourceMembers `
                                                        -DifferenceList $($definition.members | ForEach-Object {Resolve-User -InputReference $_ -Cmdlet $Cmdlet}) `
                                                        -Cmdlet $PSCmdlet
                                }
                                "groups" {
                                    $resourceGroups = (Invoke-MgGraphRequest -Method GET -Uri ("$script:graphBaseUrl/administrativeUnits/{0}/members/$/microsoft.graph.group" -f $resource.Id)).Value.Id;
                                    $change.Actions = Compare-ResourceList -ReferenceList $resourceGroups `
                                                        -DifferenceList $($definition.groups | ForEach-Object {Resolve-Group -InputReference $_ -Cmdlet $Cmdlet}) `
                                                        -Cmdlet $PSCmdlet
                                }
                                "scopedRoleMembers" {
                                    $resourceScopedRoleMembers = (Invoke-MgGraphRequest -Method GET -Uri ("$script:graphBaseUrl/administrativeUnits/{0}/scopedRoleMembers" -f $resource.Id)).Value `
                                                                | Select-Object @{n = "identity"; e = { $_["roleMemberInfo"]["id"] }}, @{n = "role"; e = { $_["roleId"] }}, @{n = "id"; e = { $_["id"] }}

                                    $definitionScopedRoleMembers = @()
                                    $definition.scopedRoleMembers | Foreach-Object {
                                        $identityId = Resolve-User -InputReference $_.identity -Cmdlet $Cmdlet -DontFailIfNotExisting
                                        if (-Not $identityId) {
                                            $identityId = Resolve-Group -InputReference $_.identity -Cmdlet $Cmdlet
                                        }
                                        $definitionScopedRoleMembers += [PSCustomObject]@{
                                            identity = $identityId
                                            role = Resolve-DirectoryRole -InputReference $_.role -Cmdlet $Cmdlet
                                        }
                                    }                                    
                                    
                                    $dummy = Compare-ResourceList -ReferenceList ($resourceScopedRoleMembers | Select-Object role, identity | Foreach-Object {$_ | ConvertTo-Json -Compress}) `
                                                        -DifferenceList ($definitionScopedRoleMembers | Select-Object role, identity | Foreach-Object {$_ | ConvertTo-Json -Compress}) `
                                                        -Cmdlet $PSCmdlet

                                    if ($dummy.Keys.count -gt 0) {
                                        $change.Actions = @{}
                                        if ($dummy.Keys -contains "Add") { 
                                            $change.Actions["Add"] = ($dummy["Add"] | Foreach-Object { $_ | ConvertFrom-Json })
                                        }
                                        if ($dummy.Keys -contains "Remove") {
                                            $change.Actions["Remove"] = @()
                                            foreach ($toRemove in ($dummy["Remove"] | Foreach-Object {$_ | ConvertFrom-Json})) {                                            
                                                $change.Actions["Remove"] += ($resourceScopedRoleMembers | Where-Object {$_.role -eq $toRemove.role -and $_.identity -eq $toRemove.identity}).id
                                            }
                                        }                                
                                    }                            
                                }
                                default {
                                    if ($definition.$property -ne $resource.$property) {
                                        if(!( ($property -eq "visibility") -and !($resource.$property) -and ($definition.$property -eq "Public") )){
                                            $change.Actions = @{"Set" = $definition.$property};
                                        }
                                    }
                                }
                            }
                            if ($change.Actions) {$changes += $change}
                        }
    
                        if ($changes.count -gt 0) { $result = New-TestResult @result -Changes $changes -ActionType "Update"}
                        else { $result = New-TestResult @result -ActionType "NoActionRequired" }
                    }
                    else {
                        $result = New-TestResult @result -ActionType "Delete"
                    }
                }
                default {
                    Write-PSFMessage -Level Warning -String 'TMF.Test.MultipleResourcesError' -StringValues $componentName, $definition.displayName -Tag 'failed'
                    $exception = New-Object System.Data.DataException("Query returned multiple results. Cannot decide which resource to test.")
                    $errorID = 'MultipleResourcesError'
                    $category = [System.Management.Automation.ErrorCategory]::NotSpecified
                    $recordObject = New-Object System.Management.Automation.ErrorRecord($exception, $errorID, $category, $Cmdlet)
                    $cmdlet.ThrowTerminatingError($recordObject)
                }
            }
            $result
        }
    }
}