StatisticsController::index PHP Method

    public function index()
    {
        $this->permission('Garden.Settings.Manage');
        $this->setHighlightRoute('dashboard/statistics');
        //$this->addJsFile('statistics.js');
        $this->title(t('Vanilla Statistics'));
        if ($this->Form->authenticatedPostBack()) {
            $Flow = true;
            if ($Flow && $this->Form->getFormValue('Reregister')) {
                $id = Gdn::installationID();
                $secret = Gdn::installationSecret();
                Gdn::installationID(false);
                Gdn::installationSecret(false);
                Gdn::Statistics()->register();
                if (!Gdn::installationID()) {
                    Gdn::installationID($id);
                    Gdn::installationSecret($secret);
                }
                $this->Form->setFormValue('InstallationID', Gdn::installationID());
                $this->Form->setFormValue('InstallationSecret', Gdn::installationSecret());
            }
            if ($Flow && $this->Form->getFormValue('Save')) {
                Gdn::installationID($this->Form->getFormValue('InstallationID'));
                Gdn::installationSecret($this->Form->getFormValue('InstallationSecret'));
                $this->informMessage(t("Your settings have been saved."));
            }
            if ($Flow && $this->Form->getFormValue('AllowLocal')) {
                saveToConfig('Garden.Analytics.AllowLocal', true);
            }
            if ($Flow && $this->Form->getFormValue('Allow')) {
                saveToConfig('Garden.Analytics.Enabled', true);
            }
            if ($Flow && $this->Form->getFormValue('ClearCredentials')) {
                Gdn::installationID(false);
                Gdn::installationSecret(false);
                Gdn::statistics()->Tick();
                $Flow = false;
            }
        } else {
            $this->Form->setValue('InstallationID', Gdn::installationID());
            $this->Form->setValue('InstallationSecret', Gdn::installationSecret());
        }
        $AnalyticsEnabled = Gdn_Statistics::checkIsEnabled();
        if ($AnalyticsEnabled) {
            $ConfFile = Gdn::config()->defaultPath();
            $this->setData('ConfWritable', $ConfWritable = is_writable($ConfFile));
            if (!$ConfWritable) {
                $AnalyticsEnabled = false;
            }
            $this->Form->setFormValue('InstallationID', Gdn::installationID());
            $this->Form->setFormValue('InstallationSecret', Gdn::installationSecret());
        }
        $this->setData('AnalyticsEnabled', $AnalyticsEnabled);
        $NotifyMessage = Gdn::get('Garden.Analytics.Notify', false);
        $this->setData('NotifyMessage', $NotifyMessage);
        if ($NotifyMessage !== false) {
            Gdn::set('Garden.Analytics.Notify', null);
        }
        $this->setData('FormView', $this->data('AnalyticsEnabled') ? 'configuration' : 'disabled');
        $this->render($this->deliveryType() === DELIVERY_TYPE_VIEW ? $this->data('FormView') : '');
    }