Controller.php

<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 *
 */

namespace Piwik\Plugins\ExcludeByDDNS;

use Piwik\Common;
use Piwik\Date;
use Piwik\IP;
use Piwik\Nonce;
use Piwik\Piwik;
use Piwik\Tracker\Cache;
use Piwik\Url;
use Piwik\View;

/**
 *
 */
class Controller extends \Piwik\Plugin\ControllerAdmin
{
    public function admin()
    {
        Piwik::checkUserHasSomeAdminAccess();

        $view = new View('@ExcludeByDDNS/admin');
        $this->setGeneralVariablesView($view);

        $view->exclusions = [];

        $users = Storage::getAllUsersWithConfig();
        foreach ($users as $user) {
            $storage            = new Storage($user);
            $lastUpdated        = $storage->getLastUpdated();
            $view->exclusions[] = [
                'username'    => $user,
                'ip'          => $storage->getIp(),
                'hostname'    => $storage->getHostname(),
                'lastUpdated' => $lastUpdated ? Date::factory($lastUpdated)->getLocalized(
                    Date::DATETIME_FORMAT_SHORT
                ) : '',
            ];
        }

        return $view->render();
    }

    public function index()
    {
        Piwik::checkUserHasSomeViewAccess();
        Piwik::checkUserIsNotAnonymous();

        $nonce    = Common::getRequestVar('nonce', false);
        $hostname = Common::getRequestVar('excludedHostname', false);

        $storage = new Storage(Piwik::getCurrentUserLogin());

        $view = new View('@ExcludeByDDNS/index');
        $this->setBasicVariablesView($view);

        if ($nonce !== false && Nonce::verifyNonce('Piwik_ExcludeHostname' . Piwik::getCurrentUserLogin(), $nonce)) {
            if ($hostname) {
                $ip = gethostbyname($hostname);

                if ($ip != $hostname) {
                    $storage->setHostname($hostname);
                    $storage->setIp($ip);
                } else {
                    $view->excludedHostname = $hostname;
                    $view->hostnameError    = true;
                }
            } else {
                $storage->setHostname('');
            }
        }

        $view->updateUrl = Url::getCurrentUrlWithoutQueryString(false) . '?' . Url::getQueryStringFromParameters([
                                                                                                                     'module'     => 'ExcludeByDDNS',
                                                                                                                     'action'     => 'update',
                                                                                                                     'token_auth' => '{app_specific_token}',
                                                                                                                 ]);

        $view->excludedHostname = $storage->getHostname();
        $view->excludedIp       = $storage->getIp();
        $lastUpdated            = $storage->getLastUpdated();
        $view->lastUpdated      = $lastUpdated ? Date::factory($lastUpdated)->getLocalized(
            Date::DATETIME_FORMAT_SHORT
        ) : '';
        $view->nonce            = Nonce::getNonce('Piwik_ExcludeHostname' . Piwik::getCurrentUserLogin(), 3600);

        return $view->render();
    }


    public function update()
    {
        Piwik::checkUserHasSomeViewAccess();
        Piwik::checkUserIsNotAnonymous();

        $ip   = IP::getIpFromHeader();
        $user = Piwik::getCurrentUserLogin();

        $storage = new Storage($user);
        $storage->setIp($ip);
        Cache::clearCacheGeneral();
    }
}