app\http\controllers\AccountController::saveClientPortal PHP Method

    private function saveClientPortal()
    {
        $account = Auth::user()->account;
        $account->fill(Input::all());
        // Only allowed for pro Invoice Ninja users or white labeled self-hosted users
        if (Auth::user()->account->hasFeature(FEATURE_CLIENT_PORTAL_CSS)) {
            $input_css = Input::get('client_view_css');
            if (Utils::isNinja()) {
                // Allow referencing the body element
                $input_css = preg_replace('/(?<![a-z0-9\\-\\_\\#\\.])body(?![a-z0-9\\-\\_])/i', '.body', $input_css);
                //
                // Inspired by http://stackoverflow.com/a/5209050/1721527, dleavitt <https://stackoverflow.com/users/362110/dleavitt>
                //
                // Create a new configuration object
                $config = \HTMLPurifier_Config::createDefault();
                $config->set('Filter.ExtractStyleBlocks', true);
                $config->set('CSS.AllowImportant', true);
                $config->set('CSS.AllowTricky', true);
                $config->set('CSS.Trusted', true);
                // Create a new purifier instance
                $purifier = new \HTMLPurifier($config);
                // Wrap our CSS in style tags and pass to purifier.
                // we're not actually interested in the html response though
                $html = $purifier->purify('<style>' . $input_css . '</style>');
                // The "style" blocks are stored seperately
                $output_css = $purifier->context->get('StyleBlocks');
                // Get the first style block
                $sanitized_css = count($output_css) ? $output_css[0] : '';
            } else {
                $sanitized_css = $input_css;
            }
            $account->client_view_css = $sanitized_css;
        }
        $account->save();
        Session::flash('message', trans('texts.updated_settings'));
        return Redirect::to('settings/' . ACCOUNT_CLIENT_PORTAL);
    }

 /**
  * @param $section
  * @return \Illuminate\Http\RedirectResponse
  */
 public function doSection($section = ACCOUNT_COMPANY_DETAILS)
 {
     if ($section === ACCOUNT_COMPANY_DETAILS) {
         return AccountController::saveDetails();
     } elseif ($section === ACCOUNT_LOCALIZATION) {
         return AccountController::saveLocalization();
     } elseif ($section == ACCOUNT_PAYMENTS) {
         return self::saveOnlinePayments();
     } elseif ($section === ACCOUNT_NOTIFICATIONS) {
         return AccountController::saveNotifications();
     } elseif ($section === ACCOUNT_EXPORT) {
         return AccountController::export();
     } elseif ($section === ACCOUNT_INVOICE_SETTINGS) {
         return AccountController::saveInvoiceSettings();
     } elseif ($section === ACCOUNT_EMAIL_SETTINGS) {
         return AccountController::saveEmailSettings();
     } elseif ($section === ACCOUNT_INVOICE_DESIGN) {
         return AccountController::saveInvoiceDesign();
     } elseif ($section === ACCOUNT_CUSTOMIZE_DESIGN) {
         return AccountController::saveCustomizeDesign();
     } elseif ($section === ACCOUNT_CLIENT_PORTAL) {
         return AccountController::saveClientPortal();
     } elseif ($section === ACCOUNT_TEMPLATES_AND_REMINDERS) {
         return AccountController::saveEmailTemplates();
     } elseif ($section === ACCOUNT_PRODUCTS) {
         return AccountController::saveProducts();
     } elseif ($section === ACCOUNT_TAX_RATES) {
         return AccountController::saveTaxRates();
     } elseif ($section === ACCOUNT_PAYMENT_TERMS) {
         return AccountController::savePaymetTerms();
     }
 }