RoleController::index PHP Method

    public function index($roleID = null)
    {
        $this->_permission();
        $this->setHighlightRoute('dashboard/role');
        $this->addJsFile('jquery.tablednd.js');
        $this->title(t('Roles & Permissions'));
        if (!$roleID) {
            $roles = $this->RoleModel->getWithRankPermissions()->resultArray();
            // Check to see which roles can be modified.
            foreach ($roles as &$row) {
                $canModify = true;
                if (!Gdn::session()->checkPermission('Garden.Settings.Manage')) {
                    foreach ($this->RoleModel->RankPermissions as $permission) {
                        if ($row[$permission] && !Gdn::session()->checkPermission($permission)) {
                            $canModify = false;
                            break;
                        }
                    }
                }
                $row['CanModify'] = $canModify;
            }
            $this->setData('Roles', $roles);
        } elseif ($this->deliveryType() === DELIVERY_TYPE_DATA) {
            // This is an API request. Get the role in a nicer format.
            $role = $this->RoleModel->getID($roleID, DATASET_TYPE_ARRAY);
            // Get the global permissions.
            $permissions = Gdn::permissionModel()->getGlobalPermissions($roleID);
            unset($permissions['PermissionID']);
            // Get the per-category permissions.
            $permissions['Category'] = $this->RoleModel->getCategoryPermissions($roleID);
            $role['Permissions'] = $permissions;
            $this->setData('Role', $role);
            saveToConfig('Api.Clean', false, false);
        } else {
            $Role = $this->RoleModel->getID($roleID);
            $this->setData('Roles', [$Role]);
        }
        // Grab the total users for each role.
        if (is_array($this->data('Roles'))) {
            $pastThreshold = Gdn::userModel()->pastUserMegaThreshold();
            $thresholdTypeExceptions = RoleModel::getDefaultTypes();
            unset($thresholdTypeExceptions[RoleModel::TYPE_MEMBER]);
            $roles = $this->data('Roles');
            foreach ($roles as &$role) {
                if ($pastThreshold && !in_array($role['Type'], $thresholdTypeExceptions)) {
                    $countUsers = t('View');
                } else {
                    $countUsers = $this->RoleModel->getUserCount($role['RoleID']);
                }
                $role['CountUsers'] = $countUsers;
            }
            $this->setData('Roles', $roles);
        }
        $this->render();
    }