plugins/Diagnostics/Diagnostic/TrackerCheck.php

<?php

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

namespace Piwik\Plugins\Diagnostics\Diagnostic;

use Piwik\Common;
use Piwik\Translation\Translator;

/**
 * Check that the tracker is working correctly.
 */
class TrackerCheck implements Diagnostic
{
    /**
     * @var Translator
     */
    private $translator;

    public function __construct(Translator $translator)
    {
        $this->translator = $translator;
    }

    public function execute()
    {
        $label = $this->translator->translate('Installation_SystemCheckTracker');

        $trackerStatus = Common::getRequestVar('trackerStatus', 0, 'int');

        if ($trackerStatus == 0) {
            $status = DiagnosticResult::STATUS_OK;
            $comment = '';
        } else {
            $status = DiagnosticResult::STATUS_WARNING;
            $comment = sprintf(
                '%s<br />%s<br />%s',
                $trackerStatus,
                $this->translator->translate('Installation_SystemCheckTrackerHelp'),
                $this->translator->translate('Installation_RestartWebServer')
            );
        }

        return array(DiagnosticResult::singleResult($label, $status, $comment));
    }
}