SystemInformationToolbarItem.php

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<?php
namespace TYPO3\CMS\Backend\Backend\ToolbarItems;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Backend\Toolbar\ToolbarItemInterface;
use TYPO3\CMS\Backend\Toolbar\Enumeration\InformationStatus;
use TYPO3\CMS\Backend\Utility\BackendUtility;
use TYPO3\CMS\Core\Core\Bootstrap;
use TYPO3\CMS\Core\Imaging\Icon;
use TYPO3\CMS\Core\Imaging\IconFactory;
use TYPO3\CMS\Core\Page\PageRenderer;
use TYPO3\CMS\Core\Utility\CommandUtility;
use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Utility\StringUtility;
use TYPO3\CMS\Fluid\View\StandaloneView;

class SystemInformationToolbarItem implements ToolbarItemInterface
{
    protected $standaloneView = null;

    const TOOLBAR_MENU_TEMPLATE = 'SystemInformation.html';

    protected $totalCount = 0;

    protected $highestSeverity;

    protected $severityBadgeClass = '';

    protected $systemInformation = array();

    protected $systemMessages = array();

    protected $signalSlotDispatcher = null;

    protected $iconFactory;

    public function __construct()
    {
        if (!$this->checkAccess()) {
            return;
        }
        $this->iconFactory = GeneralUtility::makeInstance(IconFactory::class);

        $extPath = ExtensionManagementUtility::extPath('backend');
        /* @var $view StandaloneView */
        $this->standaloneView = GeneralUtility::makeInstance(StandaloneView::class);
        $this->standaloneView->setTemplatePathAndFilename($extPath . 'Resources/Private/Templates/ToolbarMenu/' . static::TOOLBAR_MENU_TEMPLATE);

        $this->getPageRenderer()->loadRequireJsModule('TYPO3/CMS/Backend/Toolbar/SystemInformationMenu');

        $this->highestSeverity = InformationStatus::cast(InformationStatus::STATUS_INFO);
    }

    protected function collectInformation()
    {
        $this->getWebServer();
        $this->getPhpVersion();
        $this->getDatabase();
        $this->getApplicationContext();
        $this->getComposerMode();
        $this->getGitRevision();
        $this->getOperatingSystem();

        $this->emitGetSystemInformation();
        $this->emitLoadMessages();

        $this->severityBadgeClass = !$this->highestSeverity->equals(InformationStatus::STATUS_NOTICE) ? 'badge-' . (string)$this->highestSeverity : '';
    }

    public function renderMenuAction(ServerRequestInterface $request, ResponseInterface $response)
    {
        $this->collectInformation();

        $response->getBody()->write($this->getDropDown());
        $response = $response->withHeader('Content-Type', 'text/html; charset=utf-8');
        return $response;
    }

    protected function getPhpVersion()
    {
        $this->systemInformation[] = array(
            'title' => $this->getLanguageService()->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo.phpversion', true),
            'value' => PHP_VERSION,
            'icon' => '<span class="fa fa-code"></span>'
        );
    }

    protected function getDatabase()
    {
        $this->systemInformation[] = array(
            'title' => $this->getLanguageService()->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo.database', true),
            'value' => $this->getDatabaseConnection()->getServerVersion(),
            'icon' => '<span class="fa fa-database"></span>'
        );
    }

    protected function getApplicationContext()
    {
        $applicationContext = GeneralUtility::getApplicationContext();
        $this->systemInformation[] = array(
            'title' => $this->getLanguageService()->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo.applicationcontext', true),
            'value' => (string)$applicationContext,
            'status' => $applicationContext->isProduction() ? InformationStatus::STATUS_OK : InformationStatus::STATUS_WARNING,
            'icon' => '<span class="fa fa-tasks"></span>'
        );
    }

    protected function getComposerMode()
    {
        if (!Bootstrap::usesComposerClassLoading()) {
            return;
        }

        $languageService = $this->getLanguageService();
        $this->systemInformation[] = array(
            'title' => $languageService->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo.composerMode', true),
            'value' => $languageService->sL('LLL:EXT:lang/locallang_core.xlf:labels.enabled', true),
            'icon' => '<span class="fa fa-music"></span>'
        );
    }

    protected function getGitRevision()
    {
        if (!StringUtility::endsWith(TYPO3_version, '-dev') || \TYPO3\CMS\Core\Core\SystemEnvironmentBuilder::isFunctionDisabled('exec')) {
            return;
        }
        // check if git exists
        CommandUtility::exec('git --version', $_, $returnCode);
        if ((int)$returnCode !== 0) {
            // git is not available
            return;
        }

        $revision = trim(CommandUtility::exec('git rev-parse --short HEAD'));
        $branch = trim(CommandUtility::exec('git rev-parse --abbrev-ref HEAD'));
        if (!empty($revision) && !empty($branch)) {
            $this->systemInformation[] = array(
                'title' => $this->getLanguageService()->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo.gitrevision', true),
                'value' => sprintf('%s [%s]', $revision, $branch),
                'icon' => '<span class="fa fa-git"></span>'
            );
        }
    }

    protected function getOperatingSystem()
    {
        $kernelName = php_uname('s');
        switch (strtolower($kernelName)) {
            case 'linux':
                $icon = 'linux';
                break;
            case 'darwin':
                $icon = 'apple';
                break;
            default:
                $icon = 'windows';
        }
        $this->systemInformation[] = array(
            'title' => $this->getLanguageService()->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo.operatingsystem', true),
            'value' => $kernelName . ' ' . php_uname('r'),
            'icon' => '<span class="fa fa-' . htmlspecialchars($icon) . '"></span>'
        );
    }

    protected function getWebServer()
    {
        $this->systemInformation[] = array(
            'title' => $this->getLanguageService()->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo.webserver', true),
            'value' => htmlspecialchars($_SERVER['SERVER_SOFTWARE']),
            'icon' => '<span class="fa fa-server"></span>'
        );
    }

    protected function emitGetSystemInformation()
    {
        // @internal This API is subject to be rebuilt from scratch anytime. Do not use in extensions!
        list($systemInformation) = $this->getSignalSlotDispatcher()->dispatch(__CLASS__, 'getSystemInformation', array(array()));
        if (!empty($systemInformation)) {
            $this->systemInformation[] = $systemInformation;
        }
    }

    protected function emitLoadMessages()
    {
        // @internal This API is subject to be rebuilt from scratch anytime. Do not use in extensions!
        list($message) = $this->getSignalSlotDispatcher()->dispatch(__CLASS__, 'loadMessages', array(array()));
        if (empty($message)) {
            return;
        }

        // increase counter
        if (isset($message['count'])) {
            $this->totalCount += (int)$message['count'];
        }

        $messageSeverity = InformationStatus::cast($message['status']);
        // define the severity for the badge
        if ($messageSeverity->isGreaterThan($this->highestSeverity)) {
            $this->highestSeverity = $messageSeverity;
        }

        $this->systemMessages[] = $message;
    }

    public function checkAccess()
    {
        return $this->getBackendUserAuthentication()->isAdmin();
    }

    public function getItem()
    {
        $title = $this->getLanguageService()->sL('LLL:EXT:lang/locallang_core.xlf:toolbarItems.sysinfo', true);
        $icon = $this->iconFactory->getIcon('actions-system-list-open', Icon::SIZE_SMALL)->render('inline');
        return '<span title="' . $title . '">' . $icon . '<span id="t3js-systeminformation-counter" class="badge"></span></span>';
    }

    public function getDropDown()
    {
        if (!$this->checkAccess()) {
            return '';
        }

        $request = $this->standaloneView->getRequest();
        $request->setControllerExtensionName('backend');
        $this->standaloneView->assignMultiple(array(
            'installToolUrl' => BackendUtility::getModuleUrl('system_InstallInstall'),
            'messages' => $this->systemMessages,
            'count' => $this->totalCount,
            'severityBadgeClass' => $this->severityBadgeClass,
            'systemInformation' => $this->systemInformation
        ));
        return $this->standaloneView->render();
    }

    public function getAdditionalAttributes()
    {
        return array();
    }

    public function hasDropDown()
    {
        return true;
    }

    public function getIndex()
    {
        return 75;
    }

    protected function getBackendUserAuthentication()
    {
        return $GLOBALS['BE_USER'];
    }

    protected function getDatabaseConnection()
    {
        return $GLOBALS['TYPO3_DB'];
    }

    protected function getPageRenderer()
    {
        return GeneralUtility::makeInstance(PageRenderer::class);
    }

    protected function getLanguageService()
    {
        return $GLOBALS['LANG'];
    }

    protected function getSignalSlotDispatcher()
    {
        if (!isset($this->signalSlotDispatcher)) {
            $this->signalSlotDispatcher = GeneralUtility::makeInstance(\TYPO3\CMS\Extbase\Object\ObjectManager::class)
                ->get(\TYPO3\CMS\Extbase\SignalSlot\Dispatcher::class);
        }
        return $this->signalSlotDispatcher;
    }
}