first commit

typo3/sysext/seo/Classes/Canonical/CanonicalGenerator.php

@@ -0,0 +1,168 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\Canonical;
+
+/*
+ * 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 TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Extbase\SignalSlot\Dispatcher;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
+use TYPO3\CMS\Frontend\Page\PageRepository;
+use TYPO3\CMS\Frontend\Utility\CanonicalizationUtility;
+
+/**
+ * Class to add the canonical tag to the page
+ *
+ * @internal this class is not part of TYPO3's Core API.
+ */
+class CanonicalGenerator
+{
+    /**
+     * @var TypoScriptFrontendController
+     */
+    protected $typoScriptFrontendController;
+
+    /**
+     * @var PageRepository
+     */
+    protected $pageRepository;
+
+    /**
+     * @var Dispatcher
+     */
+    protected $signalSlotDispatcher;
+
+    /**
+     * CanonicalGenerator constructor
+     *
+     * @param TypoScriptFrontendController $typoScriptFrontendController
+     * @param Dispatcher $signalSlotDispatcher
+     */
+    public function __construct(TypoScriptFrontendController $typoScriptFrontendController = null, Dispatcher $signalSlotDispatcher = null)
+    {
+        if ($typoScriptFrontendController === null) {
+            $typoScriptFrontendController = $this->getTypoScriptFrontendController();
+        }
+        if ($signalSlotDispatcher === null) {
+            $signalSlotDispatcher = GeneralUtility::makeInstance(Dispatcher::class);
+        }
+        $this->typoScriptFrontendController = $typoScriptFrontendController;
+        $this->signalSlotDispatcher = $signalSlotDispatcher;
+        $this->pageRepository = GeneralUtility::makeInstance(PageRepository::class);
+    }
+
+    /**
+     * @return string
+     * @throws \TYPO3\CMS\Extbase\SignalSlot\Exception\InvalidSlotException
+     * @throws \TYPO3\CMS\Extbase\SignalSlot\Exception\InvalidSlotReturnException
+     */
+    public function generate(): string
+    {
+        $href = '';
+        $this->signalSlotDispatcher->dispatch(self::class, 'beforeGeneratingCanonical', [&$href]);
+
+        if (empty($href) && (int)$this->typoScriptFrontendController->page['no_index'] === 1) {
+            return '';
+        }
+
+        if (empty($href)) {
+            // 1) Check if page show content from other page
+            $href = $this->checkContentFromPid();
+        }
+        if (empty($href)) {
+            // 2) Check if page has canonical URL set
+            $href = $this->checkForCanonicalLink();
+        }
+        if (empty($href)) {
+            // 3) Fallback, create canonical URL
+            $href = $this->checkDefaultCanonical();
+        }
+
+        if (!empty($href)) {
+            $canonical = '<link ' . GeneralUtility::implodeAttributes([
+                    'rel' => 'canonical',
+                    'href' => $href
+                ], true) . '/>' . LF;
+            $this->typoScriptFrontendController->additionalHeaderData[] = $canonical;
+            return $canonical;
+        }
+        return '';
+    }
+
+    /**
+     * @return string
+     */
+    protected function checkForCanonicalLink(): string
+    {
+        if (!empty($this->typoScriptFrontendController->page['canonical_link'])) {
+            return $this->typoScriptFrontendController->cObj->typoLink_URL([
+                'parameter' => $this->typoScriptFrontendController->page['canonical_link'],
+                'forceAbsoluteUrl' => true,
+            ]);
+        }
+        return '';
+    }
+
+    /**
+     * @return string
+     */
+    protected function checkContentFromPid(): string
+    {
+        if (!empty($this->typoScriptFrontendController->page['content_from_pid'])) {
+            $parameter = (int)$this->typoScriptFrontendController->page['content_from_pid'];
+            if ($parameter > 0) {
+                $targetPage = $this->pageRepository->getPage($parameter, true);
+                if (!empty($targetPage['canonical_link'])) {
+                    $parameter = $targetPage['canonical_link'];
+                }
+                return $this->typoScriptFrontendController->cObj->typoLink_URL([
+                    'parameter' => $parameter,
+                    'forceAbsoluteUrl' => true,
+                ]);
+            }
+        }
+        return '';
+    }
+
+    /**
+     * @return string
+     */
+    protected function checkDefaultCanonical(): string
+    {
+        return $this->typoScriptFrontendController->cObj->typoLink_URL([
+            'parameter' => $this->typoScriptFrontendController->id . ',' . $this->typoScriptFrontendController->type,
+            'forceAbsoluteUrl' => true,
+            'addQueryString' => true,
+            'addQueryString.' => [
+                'method' => 'GET',
+                'exclude' => implode(
+                    ',',
+                    CanonicalizationUtility::getParamsToExcludeForCanonicalizedUrl(
+                        (int)$this->typoScriptFrontendController->id,
+                        (array)$GLOBALS['TYPO3_CONF_VARS']['FE']['additionalCanonicalizedUrlParameters']
+                    )
+                )
+            ]
+        ]);
+    }
+
+    /**
+     * @return TypoScriptFrontendController
+     */
+    protected function getTypoScriptFrontendController(): TypoScriptFrontendController
+    {
+        return $GLOBALS['TSFE'];
+    }
+}

typo3/sysext/seo/Classes/HrefLang/HrefLangGenerator.php

@@ -0,0 +1,146 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\HrefLang;
+
+/*
+ * 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\ServerRequestInterface;
+use TYPO3\CMS\Core\Http\Uri;
+use TYPO3\CMS\Core\Site\Entity\Site;
+use TYPO3\CMS\Core\Site\Entity\SiteLanguage;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
+use TYPO3\CMS\Frontend\DataProcessing\LanguageMenuProcessor;
+
+/**
+ * Class to add the hreflang tags to the page
+ *
+ * @internal
+ */
+class HrefLangGenerator
+{
+    /**
+     * The content object renderer
+     *
+     * @var ContentObjectRenderer
+     */
+    public $cObj;
+
+    /**
+     * @var TypoScriptFrontendController
+     */
+    protected $typoScriptFrontendController;
+
+    /**
+     * @var ServerRequestInterface
+     */
+    protected $request;
+
+    /**
+     * HreflangGenerator constructor
+     *
+     * @param ContentObjectRenderer|null $cObj
+     * @param TypoScriptFrontendController|null $typoScriptFrontendController
+     */
+    public function __construct(ContentObjectRenderer $cObj = null, TypoScriptFrontendController $typoScriptFrontendController = null, ServerRequestInterface $request = null)
+    {
+        if ($cObj === null) {
+            $cObj = GeneralUtility::makeInstance(ContentObjectRenderer::class);
+        }
+        if ($typoScriptFrontendController === null) {
+            $typoScriptFrontendController = $this->getTypoScriptFrontendController();
+        }
+        if ($request === null) {
+            $request = $this->getRequest();
+        }
+
+        $this->cObj = $cObj;
+        $this->typoScriptFrontendController = $typoScriptFrontendController;
+        $this->request = $request;
+    }
+
+    public function generate(): string
+    {
+        $hreflangs = [];
+        if ((int)$this->typoScriptFrontendController->page['no_index'] === 1) {
+            return '';
+        }
+
+        if ($this->request->getAttribute('site') instanceof Site) {
+            $languageMenu = GeneralUtility::makeInstance(LanguageMenuProcessor::class);
+            $languages = $languageMenu->process($this->cObj, [], [], []);
+            foreach ($languages['languagemenu'] as $language) {
+                if ($language['available'] === 1 && !empty($language['link'])) {
+                    $href = $this->getAbsoluteUrl($language['link']);
+                    $hreflangs[] =
+                        '<link rel="alternate" hreflang="' . htmlspecialchars($language['hreflang']) . '" href="' . htmlspecialchars($href) . '"/>';
+                }
+            }
+
+            if (count($hreflangs) > 1) {
+                $href = $this->getAbsoluteUrl($languages['languagemenu'][0]['link']);
+                $hreflangs[] =
+                    '<link rel="alternate" hreflang="x-default" href="' . htmlspecialchars($href) . '"/>' . LF;
+
+                $this->getTypoScriptFrontendController()->additionalHeaderData[] = implode(LF, $hreflangs);
+            }
+        }
+
+        return implode(LF, $hreflangs);
+    }
+
+    /**
+     * @param string $url
+     * @return string
+     */
+    protected function getAbsoluteUrl(string $url): string
+    {
+        $uri = new Uri($url);
+        if (empty($uri->getHost())) {
+            $url = $this->getSiteLanguage()->getBase()->withPath($uri->getPath());
+
+            if ($uri->getQuery()) {
+                $url = $url->withQuery($uri->getQuery());
+            }
+        }
+
+        return (string)$url;
+    }
+
+    /**
+     * @return SiteLanguage
+     */
+    protected function getSiteLanguage(): SiteLanguage
+    {
+        return $this->request->getAttribute('language');
+    }
+
+    /**
+     * @return TypoScriptFrontendController
+     */
+    protected function getTypoScriptFrontendController(): TypoScriptFrontendController
+    {
+        return $GLOBALS['TSFE'];
+    }
+
+    /**
+     * @return ServerRequestInterface
+     */
+    protected function getRequest(): ServerRequestInterface
+    {
+        return $GLOBALS['TYPO3_REQUEST'];
+    }
+}

typo3/sysext/seo/Classes/MetaTag/MetaTagGenerator.php

@@ -0,0 +1,170 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\MetaTag;
+
+/*
+ * 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 TYPO3\CMS\Core\Imaging\ImageManipulation\CropVariantCollection;
+use TYPO3\CMS\Core\MetaTag\MetaTagManagerRegistry;
+use TYPO3\CMS\Core\Resource\FileReference;
+use TYPO3\CMS\Core\Resource\ProcessedFile;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Extbase\Service\ImageService;
+use TYPO3\CMS\Frontend\Resource\FileCollector;
+
+/**
+ * Class to add the metatags for the SEO fields in core
+ *
+ * @internal
+ */
+class MetaTagGenerator
+{
+    /**
+     * Generate the meta tags that can be set in backend and add them to frontend by using the MetaTag API
+     *
+     * @param array $params
+     */
+    public function generate(array $params)
+    {
+        $metaTagManagerRegistry = GeneralUtility::makeInstance(MetaTagManagerRegistry::class);
+
+        if (!empty($params['page']['description'])) {
+            $manager = $metaTagManagerRegistry->getManagerForProperty('description');
+            $manager->addProperty('description', $params['page']['description']);
+        }
+
+        if (!empty($params['page']['og_title'])) {
+            $manager = $metaTagManagerRegistry->getManagerForProperty('og:title');
+            $manager->addProperty('og:title', $params['page']['og_title']);
+        }
+
+        if (!empty($params['page']['og_description'])) {
+            $manager = $metaTagManagerRegistry->getManagerForProperty('og:description');
+            $manager->addProperty('og:description', $params['page']['og_description']);
+        }
+
+        if (!empty($params['page']['og_image'])) {
+            $fileCollector = GeneralUtility::makeInstance(FileCollector::class);
+            $fileCollector->addFilesFromRelation('pages', 'og_image', $params['page']);
+            $manager = $metaTagManagerRegistry->getManagerForProperty('og:image');
+
+            $ogImages = $this->generateSocialImages($fileCollector->getFiles());
+            foreach ($ogImages as $ogImage) {
+                $subProperties = [];
+                $subProperties['url'] = $ogImage['url'];
+                $subProperties['width'] = $ogImage['width'];
+                $subProperties['height'] = $ogImage['height'];
+
+                if (!empty($ogImage['alternative'])) {
+                    $subProperties['alt'] = $ogImage['alternative'];
+                }
+
+                $manager->addProperty(
+                    'og:image',
+                    $ogImage['url'],
+                    $subProperties
+                );
+            }
+        }
+
+        /*
+         * Set type of twitter card to summary. This value can be overridden by TypoScript or the MetaTag API by
+         * using the replace option. In v10 this will be a page property
+        */
+        $manager = $metaTagManagerRegistry->getManagerForProperty('twitter:card');
+        $manager->addProperty('twitter:card', 'summary');
+
+        if (!empty($params['page']['twitter_title'])) {
+            $manager = $metaTagManagerRegistry->getManagerForProperty('twitter:title');
+            $manager->addProperty('twitter:title', $params['page']['twitter_title']);
+        }
+
+        if (!empty($params['page']['twitter_description'])) {
+            $manager = $metaTagManagerRegistry->getManagerForProperty('twitter:description');
+            $manager->addProperty('twitter:description', $params['page']['twitter_description']);
+        }
+
+        if (!empty($params['page']['twitter_image'])) {
+            $fileCollector = GeneralUtility::makeInstance(FileCollector::class);
+            $fileCollector->addFilesFromRelation('pages', 'twitter_image', $params['page']);
+            $manager = $metaTagManagerRegistry->getManagerForProperty('twitter:image');
+
+            $twitterImages = $this->generateSocialImages($fileCollector->getFiles());
+            foreach ($twitterImages as $twitterImage) {
+                $subProperties = [];
+
+                if (!empty($twitterImage['alternative'])) {
+                    $subProperties['alt'] = $twitterImage['alternative'];
+                }
+
+                $manager->addProperty(
+                    'twitter:image',
+                    $twitterImage['url'],
+                    $subProperties
+                );
+            }
+        }
+
+        $noIndex = ((bool)$params['page']['no_index']) ? 'noindex' : 'index';
+        $noFollow = ((bool)$params['page']['no_follow']) ? 'nofollow' : 'follow';
+
+        if ($noIndex === 'noindex' || $noFollow === 'nofollow') {
+            $manager = $metaTagManagerRegistry->getManagerForProperty('robots');
+            $manager->addProperty('robots', implode(',', [$noIndex, $noFollow]));
+        }
+    }
+
+    /**
+     * @param array $fileReferences
+     * @return array
+     */
+    protected function generateSocialImages(array $fileReferences): array
+    {
+        $imageService = GeneralUtility::makeInstance(ImageService::class);
+
+        $socialImages = [];
+
+        /** @var FileReference $file */
+        foreach ($fileReferences as $file) {
+            $arguments = $file->getProperties();
+            $cropVariantCollection = CropVariantCollection::create((string)$arguments['crop']);
+            $cropVariant = $arguments['cropVariant'] ?: 'social';
+            $cropArea = $cropVariantCollection->getCropArea($cropVariant);
+            $crop = $cropArea->makeAbsoluteBasedOnFile($file);
+
+            $cropInformation = $crop->asArray();
+
+            $processingConfiguration = [
+                'crop' => $crop
+            ];
+
+            $processedImage = $file->getOriginalFile()->process(
+                ProcessedFile::CONTEXT_IMAGECROPSCALEMASK,
+                $processingConfiguration
+            );
+
+            $imageUri = $imageService->getImageUri($processedImage, true);
+
+            $socialImages[] = [
+                'url' => $imageUri,
+                'width' => floor($cropInformation['width']),
+                'height' => floor($cropInformation['height']),
+                'alternative' => $arguments['alternative'],
+            ];
+        }
+
+        return $socialImages;
+    }
+}

typo3/sysext/seo/Classes/MetaTag/OpenGraphMetaTagManager.php

@@ -0,0 +1,68 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\MetaTag;
+
+/*
+ * 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 TYPO3\CMS\Core\MetaTag\AbstractMetaTagManager;
+
+/**
+ * @internal this class is not part of TYPO3's Core API.
+ */
+class OpenGraphMetaTagManager extends AbstractMetaTagManager
+{
+    /**
+     * The default attribute that defines the name of the property
+     *
+     * This creates tags like <meta property="" /> by default
+     *
+     * @var string
+     */
+    protected $defaultNameAttribute = 'property';
+
+    /**
+     * Array of properties that can be handled by this manager
+     *
+     * @var array
+     */
+    protected $handledProperties = [
+        'og:type' => [],
+        'og:title' => [],
+        'og:description' => [],
+        'og:site_name' => [],
+        'og:url' => [],
+        'og:audio' => [],
+        'og:video' => [],
+        'og:determiner' => [],
+        'og:locale' => [
+            'allowedSubProperties' => [
+                'alternate' => [
+                    'allowMultipleOccurrences' => true
+                ],
+            ]
+        ],
+        'og:image' => [
+            'allowMultipleOccurrences' => true,
+            'allowedSubProperties' => [
+                'url' => [],
+                'secure_url' => [],
+                'type' => [],
+                'width' => [],
+                'height' => [],
+                'alt' => [],
+            ]
+        ]
+    ];
+}

typo3/sysext/seo/Classes/MetaTag/TwitterCardMetaTagManager.php

@@ -0,0 +1,71 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\MetaTag;
+
+/*
+ * 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 TYPO3\CMS\Core\MetaTag\AbstractMetaTagManager;
+
+/**
+ * @internal this class is not part of TYPO3's Core API.
+ */
+class TwitterCardMetaTagManager extends AbstractMetaTagManager
+{
+    /**
+     * Array of properties that can be handled by this manager
+     *
+     * @var array
+     */
+    protected $handledProperties = [
+        'twitter:card' => [],
+        'twitter:site' => [
+            'allowedSubProperties' => [
+                'id' => [],
+            ]
+        ],
+        'twitter:creator' => [
+            'allowedSubProperties' => [
+                'id' => [],
+            ]
+        ],
+        'twitter:description' => [],
+        'twitter:title' => [],
+        'twitter:image' => [
+            'allowedSubProperties' => [
+                'alt' => [],
+            ]
+        ],
+        'twitter:player' => [
+            'allowedSubProperties' => [
+                'width' => [],
+                'height' => [],
+                'stream' => [],
+            ]
+        ],
+        'twitter:app' => [
+            'allowedSubProperties' => [
+                'name:iphone' => [],
+                'id:iphone' => [],
+                'url:iphone' => [],
+                'name:ipad' => [],
+                'id:ipad' => [],
+                'url:ipad' => [],
+                'name:googleplay' => [],
+                'id:googleplay' => [],
+                'url:googleplay' => [],
+            ]
+        ],
+    ];
+}

typo3/sysext/seo/Classes/PageTitle/SeoTitlePageTitleProvider.php

@@ -0,0 +1,31 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\PageTitle;
+
+/*
+ * 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 TYPO3\CMS\Core\PageTitle\AbstractPageTitleProvider;
+
+/**
+ * This class will take care of the seo title that can be set in the backend
+ * @internal this class is not part of TYPO3's Core API.
+ */
+class SeoTitlePageTitleProvider extends AbstractPageTitleProvider
+{
+    public function __construct()
+    {
+        $this->title = (string)$GLOBALS['TSFE']->page['seo_title'];
+    }
+}

typo3/sysext/seo/Classes/XmlSitemap/AbstractXmlSitemapDataProvider.php

@@ -0,0 +1,138 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\XmlSitemap;
+
+/*
+ * 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\ServerRequestInterface;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
+
+/**
+ * Base class for XmlSitemapProviders to extend
+ */
+abstract class AbstractXmlSitemapDataProvider implements XmlSitemapDataProviderInterface
+{
+    /**
+     * @var string
+     */
+    protected $key;
+
+    /**
+     * @var int
+     */
+    protected $lastModified;
+
+    /**
+     * @var array
+     */
+    protected $items = [];
+
+    /**
+     * @var array
+     */
+    protected $config = [];
+
+    /**
+     * @var ContentObjectRenderer
+     */
+    protected $cObj;
+
+    /**
+     * @var int
+     */
+    protected $numberOfItemsPerPage = 1000;
+
+    /**
+     * @var ServerRequestInterface
+     */
+    protected $request;
+
+    /**
+     * AbstractXmlSitemapDataProvider constructor
+     *
+     * @param \Psr\Http\Message\ServerRequestInterface $request
+     * @param string $key
+     * @param array $config
+     * @param ContentObjectRenderer $cObj
+     */
+    public function __construct(ServerRequestInterface $request, string $key, array $config = [], ContentObjectRenderer $cObj = null)
+    {
+        $this->key = $key;
+        $this->config = $config;
+        $this->request = $request;
+
+        if ($cObj === null) {
+            $cObj = GeneralUtility::makeInstance(ContentObjectRenderer::class);
+        }
+        $this->cObj = $cObj;
+    }
+
+    /**
+     * @return string
+     */
+    public function getKey(): string
+    {
+        return $this->key;
+    }
+
+    /**
+     * @return int
+     */
+    public function getNumberOfPages(): int
+    {
+        return (int)ceil(count($this->items) / $this->numberOfItemsPerPage);
+    }
+
+    /**
+     * @return int
+     */
+    public function getLastModified(): int
+    {
+        $lastMod = 0;
+        foreach ($this->items as $item) {
+            if ((int)$item['lastMod'] > $lastMod) {
+                $lastMod = (int)$item['lastMod'];
+            }
+        }
+
+        return $lastMod;
+    }
+
+    /**
+     * @param array $data
+     * @return array
+     */
+    protected function defineUrl(array $data): array
+    {
+        return $data;
+    }
+
+    /**
+     * @return array
+     */
+    public function getItems(): array
+    {
+        $pageNumber = (int)($this->request->getQueryParams()['page'] ?? 0);
+        $page = $pageNumber > 0 ? $pageNumber : 0;
+        $items = array_slice(
+            $this->items,
+            $page * $this->numberOfItemsPerPage,
+            $this->numberOfItemsPerPage
+        );
+
+        return array_map([$this, 'defineUrl'], $items);
+    }
+}

typo3/sysext/seo/Classes/XmlSitemap/Exception/InvalidConfigurationException.php

@@ -0,0 +1,20 @@
+<?php
+declare(strict_types = 1);
+namespace TYPO3\CMS\Seo\XmlSitemap\Exception;
+
+/*
+ * 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!
+ */
+
+class InvalidConfigurationException extends \TYPO3\CMS\Core\Resource\Exception
+{
+}

typo3/sysext/seo/Classes/XmlSitemap/Exception/MissingConfigurationException.php

@@ -0,0 +1,20 @@
+<?php
+declare(strict_types = 1);
+namespace TYPO3\CMS\Seo\XmlSitemap\Exception;
+
+/*
+ * 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!
+ */
+
+class MissingConfigurationException extends \TYPO3\CMS\Core\Resource\Exception
+{
+}

typo3/sysext/seo/Classes/XmlSitemap/PagesXmlSitemapDataProvider.php

@@ -0,0 +1,124 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\XmlSitemap;
+
+/*
+ * 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\ServerRequestInterface;
+use TYPO3\CMS\Core\Context\Context;
+use TYPO3\CMS\Core\Context\LanguageAspect;
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Database\Query\QueryHelper;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
+use TYPO3\CMS\Frontend\Page\PageRepository;
+
+/**
+ * Class to generate a XML sitemap for pages
+ * @internal this class is not part of TYPO3's Core API.
+ */
+class PagesXmlSitemapDataProvider extends AbstractXmlSitemapDataProvider
+{
+    public function __construct(ServerRequestInterface $request, string $key, array $config = [], ContentObjectRenderer $cObj = null)
+    {
+        parent::__construct($request, $key, $config, $cObj);
+
+        $this->generateItems();
+    }
+
+    protected function generateItems(): void
+    {
+        $pageRepository = GeneralUtility::makeInstance(PageRepository::class);
+        $pages = $pageRepository->getPagesOverlay($this->getPages());
+        $languageAspect = $this->getCurrentLanguageAspect();
+        foreach ($pages as $page) {
+            if (!$pageRepository->isPageSuitableForLanguage($page, $languageAspect)) {
+                continue;
+            }
+
+            $this->items[] = [
+                'uid' => $page['uid'],
+                'lastMod' => (int)($page['SYS_LASTCHANGED'] ?: $page['tstamp'])
+            ];
+        }
+    }
+
+    /**
+     * @return array
+     */
+    protected function getPages(): array
+    {
+        if (!empty($this->config['rootPage'])) {
+            $rootPageId = (int)$this->config['rootPage'];
+        } else {
+            $site = $this->request->getAttribute('site');
+            $rootPageId = $site->getRootPageId();
+        }
+
+        $cObj = GeneralUtility::makeInstance(ContentObjectRenderer::class);
+        $treeList = $cObj->getTreeList(-$rootPageId, 99);
+        $treeListArray = GeneralUtility::intExplode(',', $treeList);
+
+        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getQueryBuilderForTable('pages');
+
+        $constraints = [
+            $queryBuilder->expr()->in('uid', $treeListArray)
+        ];
+
+        if (!empty($this->config['additionalWhere'])) {
+            $constraints[] = QueryHelper::stripLogicalOperatorPrefix($this->config['additionalWhere']);
+        }
+
+        if (!empty($this->config['excludedDoktypes'])) {
+            $excludedDoktypes = GeneralUtility::intExplode(',', $this->config['excludedDoktypes']);
+            if (!empty($excludedDoktypes)) {
+                $constraints[] = $queryBuilder->expr()->notIn('doktype', implode(',', $excludedDoktypes));
+            }
+        }
+        $pages = $queryBuilder->select('*')
+            ->from('pages')
+            ->where(...$constraints)
+            ->orderBy('uid', 'ASC')
+            ->execute()
+            ->fetchAll();
+
+        return $pages;
+    }
+
+    /**
+     * @return LanguageAspect
+     */
+    protected function getCurrentLanguageAspect(): LanguageAspect
+    {
+        return GeneralUtility::makeInstance(Context::class)->getAspect('language');
+    }
+
+    /**
+     * @param array $data
+     * @return array
+     */
+    protected function defineUrl(array $data): array
+    {
+        $typoLinkConfig = [
+            'parameter' => $data['uid'],
+            'forceAbsoluteUrl' => 1,
+        ];
+
+        $data['loc'] = $this->cObj->typoLink_URL($typoLinkConfig);
+
+        return $data;
+    }
+}

typo3/sysext/seo/Classes/XmlSitemap/RecordsXmlSitemapDataProvider.php

@@ -0,0 +1,195 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\XmlSitemap;
+
+/*
+ * 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\ServerRequestInterface;
+use TYPO3\CMS\Core\Context\Context;
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Database\Query\QueryHelper;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
+use TYPO3\CMS\Seo\XmlSitemap\Exception\MissingConfigurationException;
+
+/**
+ * XmlSiteDataProvider will provide information for the XML sitemap for a specific database table
+ * @internal this class is not part of TYPO3's Core API.
+ */
+class RecordsXmlSitemapDataProvider extends AbstractXmlSitemapDataProvider
+{
+    /**
+     * @param ServerRequestInterface $request
+     * @param string $key
+     * @param array $config
+     * @param ContentObjectRenderer|null $cObj
+     * @throws MissingConfigurationException
+     */
+    public function __construct(ServerRequestInterface $request, string $key, array $config = [], ContentObjectRenderer $cObj = null)
+    {
+        parent::__construct($request, $key, $config, $cObj);
+
+        $this->generateItems();
+    }
+
+    /**
+     * @throws MissingConfigurationException
+     */
+    public function generateItems(): void
+    {
+        $table = $this->config['table'];
+
+        if (empty($table)) {
+            throw new MissingConfigurationException(
+                'No configuration found for sitemap ' . $this->getKey(),
+                1535576053
+            );
+        }
+
+        $pids = !empty($this->config['pid']) ? GeneralUtility::intExplode(',', $this->config['pid']) : [];
+        $lastModifiedField = $this->config['lastModifiedField'] ?? 'tstamp';
+        $sortField = $this->config['sortField'] ?? 'sorting';
+
+        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getQueryBuilderForTable($table);
+
+        $constraints = [];
+        if (!empty($GLOBALS['TCA'][$table]['ctrl']['languageField'])) {
+            $constraints[] = $queryBuilder->expr()->in(
+                $GLOBALS['TCA'][$table]['ctrl']['languageField'],
+                [
+                    -1, // All languages
+                    $this->getLanguageId()  // Current language
+                ]
+            );
+        }
+
+        if (!empty($pids)) {
+            $recursiveLevel = isset($this->config['recursive']) ? (int)$this->config['recursive'] : 0;
+            if ($recursiveLevel) {
+                $newList = [];
+                foreach ($pids as $pid) {
+                    $list = $this->cObj->getTreeList($pid, $recursiveLevel);
+                    if ($list) {
+                        $newList = array_merge($newList, explode(',', $list));
+                    }
+                }
+                $pids = array_merge($pids, $newList);
+            }
+
+            $constraints[] = $queryBuilder->expr()->in('pid', $pids);
+        }
+
+        if (!empty($this->config['additionalWhere'])) {
+            $constraints[] = QueryHelper::stripLogicalOperatorPrefix($this->config['additionalWhere']);
+        }
+
+        $queryBuilder->select('*')
+            ->from($table);
+
+        if (!empty($constraints)) {
+            $queryBuilder->where(
+                ...$constraints
+            );
+        }
+
+        $rows = $queryBuilder->orderBy($sortField)
+            ->execute()
+            ->fetchAll();
+
+        foreach ($rows as $row) {
+            $this->items[] = [
+                'data' => $row,
+                'lastMod' => (int)$row[$lastModifiedField]
+            ];
+        }
+    }
+
+    /**
+     * @param array $data
+     * @return array
+     */
+    protected function defineUrl(array $data): array
+    {
+        $pageId = $this->config['url']['pageId'] ?? $GLOBALS['TSFE']->id;
+        $additionalParams = [];
+
+        $additionalParams = $this->getUrlFieldParameterMap($additionalParams, $data['data']);
+        $additionalParams = $this->getUrlAdditionalParams($additionalParams);
+
+        $additionalParamsString = http_build_query(
+            $additionalParams,
+            '',
+            '&',
+            PHP_QUERY_RFC3986
+        );
+
+        $typoLinkConfig = [
+            'parameter' => $pageId,
+            'additionalParams' => $additionalParamsString ? '&' . $additionalParamsString : '',
+            'forceAbsoluteUrl' => 1,
+            'useCacheHash' => $this->config['url']['useCacheHash'] ?? 0
+        ];
+
+        $data['loc'] = $this->cObj->typoLink_URL($typoLinkConfig);
+
+        return $data;
+    }
+
+    /**
+     * @param array $additionalParams
+     * @param array $data
+     * @return array
+     */
+    protected function getUrlFieldParameterMap(array $additionalParams, array $data): array
+    {
+        if (!empty($this->config['url']['fieldToParameterMap']) &&
+            \is_array($this->config['url']['fieldToParameterMap'])) {
+            foreach ($this->config['url']['fieldToParameterMap'] as $field => $urlPart) {
+                $additionalParams[$urlPart] = $data[$field];
+            }
+        }
+
+        return $additionalParams;
+    }
+
+    /**
+     * @param array $additionalParams
+     * @return array
+     */
+    protected function getUrlAdditionalParams(array $additionalParams): array
+    {
+        if (!empty($this->config['url']['additionalGetParameters']) &&
+            is_array($this->config['url']['additionalGetParameters'])) {
+            foreach ($this->config['url']['additionalGetParameters'] as $extension => $extensionConfig) {
+                foreach ($extensionConfig as $key => $value) {
+                    $additionalParams[$extension . '[' . $key . ']'] = $value;
+                }
+            }
+        }
+
+        return $additionalParams;
+    }
+
+    /**
+     * @return int
+     * @throws \TYPO3\CMS\Core\Context\Exception\AspectNotFoundException
+     */
+    protected function getLanguageId(): int
+    {
+        $context = GeneralUtility::makeInstance(Context::class);
+        return (int)$context->getPropertyFromAspect('language', 'id');
+    }
+}

typo3/sysext/seo/Classes/XmlSitemap/XmlSitemapDataProviderInterface.php

@@ -0,0 +1,32 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\XmlSitemap;
+
+/*
+ * 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\ServerRequestInterface;
+use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
+
+/**
+ * Interface for XmlSitemapDataProviders containing the methods that are called by the XmlSitemapRenderer
+ */
+interface XmlSitemapDataProviderInterface
+{
+    public function __construct(ServerRequestInterface $request, string $name, array $config = [], ContentObjectRenderer $cObj = null);
+    public function getKey(): string;
+    public function getItems(): array;
+    public function getLastModified(): int;
+    public function getNumberOfPages(): int;
+}

typo3/sysext/seo/Classes/XmlSitemap/XmlSitemapRenderer.php

@@ -0,0 +1,169 @@
+<?php
+declare(strict_types = 1);
+
+namespace TYPO3\CMS\Seo\XmlSitemap;
+
+/*
+ * 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\ServerRequestInterface;
+use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Core\Utility\PathUtility;
+use TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface;
+use TYPO3\CMS\Extbase\Object\ObjectManager;
+use TYPO3\CMS\Fluid\View\StandaloneView;
+use TYPO3\CMS\Seo\XmlSitemap\Exception\InvalidConfigurationException;
+
+/**
+ * Class to render the XML Sitemap to be used as a UserFunction
+ * @internal this class is not part of TYPO3's Core API.
+ */
+class XmlSitemapRenderer
+{
+    /**
+     * @var array
+     */
+    protected $configuration;
+
+    /**
+     * @var \TYPO3\CMS\Fluid\View\StandaloneView
+     */
+    protected $view;
+
+    public function __construct()
+    {
+        $this->configuration = $this->getConfiguration();
+        $this->view = $this->getStandaloneView();
+        $this->view->assign(
+            'xslFile',
+            PathUtility::stripPathSitePrefix(
+                ExtensionManagementUtility::extPath('seo', 'Resources/Public/CSS/Sitemap.xsl')
+            )
+        );
+    }
+
+    /**
+     * @return string
+     * @throws InvalidConfigurationException
+     */
+    public function render(): string
+    {
+        // Inject request from globals until request will be available to cObj
+        $request = $GLOBALS['TYPO3_REQUEST'];
+        $this->view->assign('type', $GLOBALS['TSFE']->type);
+        if (!empty($sitemap = $request->getQueryParams()['sitemap'])) {
+            return $this->renderSitemap($request, $sitemap);
+        }
+
+        return $this->renderIndex($request);
+    }
+
+    /**
+     * @param \Psr\Http\Message\ServerRequestInterface $request
+     * @return string
+     */
+    protected function renderIndex(ServerRequestInterface $request): string
+    {
+        $sitemaps = [];
+        foreach ($this->configuration['config']['xmlSitemap']['sitemaps'] ?? [] as $sitemap => $config) {
+            if (class_exists($config['provider']) &&
+                is_subclass_of($config['provider'], XmlSitemapDataProviderInterface::class)) {
+                /** @var XmlSitemapDataProviderInterface $provider */
+                $provider = GeneralUtility::makeInstance(
+                    $config['provider'],
+                    $request,
+                    $sitemap,
+                    (array)$config['config']
+                );
+
+                $pages = $provider->getNumberOfPages();
+
+                for ($page = 0; $page < $pages; $page++) {
+                    $sitemaps[] = [
+                        'key' => $sitemap,
+                        'page' => $page,
+                        'lastMod' => $provider->getLastModified()
+                    ];
+                }
+            }
+        }
+
+        $this->view->assign('sitemaps', $sitemaps);
+        $this->view->setTemplate('Index');
+
+        return $this->view->render();
+    }
+
+    /**
+     * @param \Psr\Http\Message\ServerRequestInterface $request
+     * @param string $sitemap
+     * @return string
+     * @throws \TYPO3\CMS\Seo\XmlSitemap\Exception\InvalidConfigurationException
+     */
+    protected function renderSitemap(ServerRequestInterface $request, string $sitemap): string
+    {
+        if (!empty($sitemapConfig = $this->configuration['config']['xmlSitemap']['sitemaps'][$sitemap])) {
+            if (class_exists($sitemapConfig['provider']) &&
+                is_subclass_of($sitemapConfig['provider'], XmlSitemapDataProviderInterface::class)) {
+                /** @var XmlSitemapDataProviderInterface $provider */
+                $provider = GeneralUtility::makeInstance(
+                    $sitemapConfig['provider'],
+                    $request,
+                    $sitemap,
+                    (array)$sitemapConfig['config']
+                );
+
+                $items = $provider->getItems();
+
+                $template = $sitemapConfig['config']['template'] ?: 'Sitemap';
+                $this->view->setTemplate($template);
+                $this->view->assign('items', $items);
+
+                return $this->view->render();
+            }
+            throw new InvalidConfigurationException('No valid provider set for ' . $sitemap, 1535578522);
+        }
+
+        throw new InvalidConfigurationException('No valid configuration found for sitemap ' . $sitemap, 1535578569);
+    }
+
+    /**
+     * @return \TYPO3\CMS\Fluid\View\StandaloneView
+     */
+    protected function getStandaloneView(): StandaloneView
+    {
+        $view = GeneralUtility::makeInstance(StandaloneView::class);
+        $view->setTemplateRootPaths($this->configuration['view']['templateRootPaths']);
+        $view->setLayoutRootPaths($this->configuration['view']['layoutRootPaths']);
+        $view->setPartialRootPaths($this->configuration['view']['partialRootPaths']);
+        $view->setFormat('xml');
+
+        return $view;
+    }
+
+    /**
+     * Get the whole typoscript array
+     * @return array
+     */
+    private function getConfiguration(): array
+    {
+        $configurationManager = GeneralUtility::makeInstance(ObjectManager::class)
+            ->get(ConfigurationManagerInterface::class);
+
+        return $configurationManager->getConfiguration(
+            ConfigurationManagerInterface::CONFIGURATION_TYPE_FRAMEWORK,
+            'seo'
+        );
+    }
+}

typo3/sysext/seo/Configuration/TCA/Overrides/pages.php

@@ -0,0 +1,245 @@
+<?php
+defined('TYPO3_MODE') or die();
+
+$openGraphCropConfiguration = [
+    'config' => [
+        'cropVariants' => [
+            'default' => [
+                'disabled' => true,
+            ],
+            'social' => [
+                'title' => 'LLL:EXT:core/Resources/Private/Language/locallang_wizards.xlf:imwizard.crop_variant.social',
+                'coverAreas' => [],
+                'cropArea' => [
+                    'x' => '0.0',
+                    'y' => '0.0',
+                    'width' => '1.0',
+                    'height' => '1.0'
+                ],
+                'allowedAspectRatios' => [
+                    '1.91:1' => [
+                        'title' => 'LLL:EXT:core/Resources/Private/Language/locallang_wizards.xlf:imwizard.ratio.191_1',
+                        'value' => 1.91 / 1
+                    ],
+                    'NaN' => [
+                        'title' => 'LLL:EXT:core/Resources/Private/Language/locallang_wizards.xlf:imwizard.ratio.free',
+                        'value' => 0.0
+                    ],
+                ],
+                'selectedRatio' => '1.91:1',
+            ],
+        ],
+    ],
+];
+
+$tca = [
+    'palettes' => [
+        'seo' => [
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.palettes.seo',
+            'showitem' => 'seo_title;LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.seo_title',
+        ],
+        'robots' => [
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.palettes.robots',
+            'showitem' => 'no_index;LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.no_index_formlabel, no_follow;LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.no_follow_formlabel',
+        ],
+        'canonical' => [
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.palettes.canonical',
+            'showitem' => 'canonical_link',
+        ],
+        'opengraph' => [
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.palettes.opengraph',
+            'showitem' => 'og_title, --linebreak--, og_description, --linebreak--, og_image',
+        ],
+        'twittercards' => [
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.palettes.twittercards',
+            'showitem' => 'twitter_title, --linebreak--, twitter_description, --linebreak--, twitter_image',
+        ],
+    ],
+    'columns' => [
+        'seo_title' => [
+            'exclude' => true,
+            'l10n_mode' => 'prefixLangTitle',
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.seo_title',
+            'config' => [
+                'type' => 'input',
+                'size' => 40,
+                'max' => 255,
+                'eval' => 'trim'
+            ]
+        ],
+        'no_index' => [
+            'exclude' => true,
+            'l10n_mode' => 'exclude',
+            'onChange' => 'reload',
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.no_index_formlabel',
+            'config' => [
+                'type' => 'check',
+                'renderType' => 'checkboxToggle',
+                'items' => [
+                    [
+                        '0' => '',
+                        '1' => '',
+                        'invertStateDisplay' => true
+                    ]
+                ]
+            ]
+        ],
+        'no_follow' => [
+            'exclude' => true,
+            'l10n_mode' => 'exclude',
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.no_follow_formlabel',
+            'config' => [
+                'type' => 'check',
+                'renderType' => 'checkboxToggle',
+                'items' => [
+                    [
+                        '0' => '',
+                        '1' => '',
+                        'invertStateDisplay' => true
+                    ]
+                ]
+            ]
+        ],
+        'canonical_link' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.canonical_link',
+            'displayCond' => 'FIELD:no_index:=:0',
+            'config' => [
+                'type' => 'input',
+                'renderType' => 'inputLink',
+                'size' => 50,
+                'max' => 1024,
+                'eval' => 'trim',
+                'fieldControl' => [
+                    'linkPopup' => [
+                        'options' => [
+                            'title' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.canonical_link',
+                            'blindLinkFields' => 'class,target,title',
+                            'blindLinkOptions' => 'mail,folder,file'
+                        ],
+                    ],
+                ],
+                'softref' => 'typolink'
+            ]
+        ],
+        'og_title' => [
+            'exclude' => true,
+            'l10n_mode' => 'prefixLangTitle',
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.og_title',
+            'config' => [
+                'type' => 'input',
+                'size' => 40,
+                'max' => 255,
+                'eval' => 'trim'
+            ]
+        ],
+        'og_description' => [
+            'exclude' => true,
+            'l10n_mode' => 'prefixLangTitle',
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.og_description',
+            'config' => [
+                'type' => 'text',
+                'cols' => 40,
+                'rows' => 3
+            ]
+        ],
+        'og_image' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.og_image',
+            'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig(
+                'og_image',
+                [
+                    // Use the imageoverlayPalette instead of the basicoverlayPalette
+                    'overrideChildTca' => [
+                        'types' => [
+                            '0' => [
+                                'showitem' => '
+                                    --palette--;;imageoverlayPalette,
+                                    --palette--;;filePalette'
+                            ],
+                            \TYPO3\CMS\Core\Resource\File::FILETYPE_IMAGE => [
+                                'showitem' => '
+                                    --palette--;;imageoverlayPalette,
+                                    --palette--;;filePalette'
+                            ]
+                        ],
+                        'columns' => [
+                            'crop' => $openGraphCropConfiguration
+                        ]
+                    ],
+                    'behaviour' => [
+                        'allowLanguageSynchronization' => true
+                    ]
+                ],
+                $GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext']
+            )
+        ],
+        'twitter_title' => [
+            'exclude' => true,
+            'l10n_mode' => 'prefixLangTitle',
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.twitter_title',
+            'config' => [
+                'type' => 'input',
+                'size' => 40,
+                'max' => 255,
+                'eval' => 'trim'
+            ]
+        ],
+        'twitter_description' => [
+            'exclude' => true,
+            'l10n_mode' => 'prefixLangTitle',
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.twitter_description',
+            'config' => [
+                'type' => 'text',
+                'cols' => 40,
+                'rows' => 3
+            ]
+        ],
+        'twitter_image' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.twitter_image',
+            'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig(
+                'twitter_image',
+                [
+                    // Use the imageoverlayPalette instead of the basicoverlayPalette
+                    'overrideChildTca' => [
+                        'types' => [
+                            '0' => [
+                                'showitem' => '
+                                    --palette--;;imageoverlayPalette,
+                                    --palette--;;filePalette'
+                            ],
+                            \TYPO3\CMS\Core\Resource\File::FILETYPE_IMAGE => [
+                                'showitem' => '
+                                    --palette--;;imageoverlayPalette,
+                                    --palette--;;filePalette'
+                            ]
+                        ],
+                        'columns' => [
+                            'crop' => $openGraphCropConfiguration
+                        ]
+                    ],
+                    'behaviour' => [
+                        'allowLanguageSynchronization' => true
+                    ]
+                ],
+                $GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext']
+            )
+        ],
+    ],
+];
+
+$GLOBALS['TCA']['pages'] = array_replace_recursive($GLOBALS['TCA']['pages'], $tca);
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes(
+    'pages',
+    '
+    --div--;LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.tabs.seo,
+        --palette--;;seo,
+        --palette--;;robots,
+        --palette--;;canonical,
+    --div--;LLL:EXT:seo/Resources/Private/Language/locallang_tca.xlf:pages.tabs.socialmedia,
+        --palette--;;opengraph,
+        --palette--;;twittercards',
+    (string)\TYPO3\CMS\Frontend\Page\PageRepository::DOKTYPE_DEFAULT,
+    'after:title'
+);

typo3/sysext/seo/Configuration/TCA/Overrides/sys_template.php

@@ -0,0 +1,8 @@
+<?php
+defined('TYPO3_MODE') or die();
+
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
+    'seo',
+    'Configuration/TypoScript/XmlSitemap',
+    'XML Sitemap'
+);

typo3/sysext/seo/Configuration/TypoScript/XmlSitemap/constants.typoscript

@@ -0,0 +1,21 @@
+plugin.tx_seo {
+  view {
+    # cat=plugin.tx_seo/file; type=string; label=Path to template root (FE)
+    templateRootPath = EXT:seo/Resources/Private/Templates/
+    # cat=plugin.tx_seo/file; type=string; label=Path to template partials (FE)
+    partialRootPath = EXT:seo/Resources/Private/Partials/
+    # cat=plugin.tx_seo/file; type=string; label=Path to template layouts (FE)
+    layoutRootPath = EXT:seo/Resources/Private/Layouts/
+  }
+
+  settings {
+    xmlSitemap {
+      sitemaps {
+        pages {
+          excludedDoktypes = 3, 4, 6, 7, 199, 254, 255
+          additionalWhere = no_index = 0 AND canonical_link = ''
+        }
+      }
+    }
+  }
+}

typo3/sysext/seo/Configuration/TypoScript/XmlSitemap/setup.typoscript

@@ -0,0 +1,51 @@
+seo_sitemap = PAGE
+seo_sitemap {
+  typeNum = 1533906435
+
+  config {
+    cache_period = 900
+    disableAllHeaderCode = 1
+    admPanel = 0
+    removeDefaultJS = 1
+    removeDefaultCss = 1
+    removePageCss = 1
+    additionalHeaders {
+      10.header = Content-Type:application/xml;charset=utf-8
+      20.header = X-Robots-Tag:noindex
+    }
+  }
+
+  10 = USER
+  10.userFunc = TYPO3\CMS\Seo\XmlSitemap\XmlSitemapRenderer->render
+}
+
+plugin.tx_seo {
+  view {
+    templateRootPaths {
+      0 = EXT:seo/Resources/Private/Templates/XmlSitemap
+      10 = {$plugin.tx_seo.view.templateRootPath}
+    }
+    partialRootPaths {
+      0 = EXT:seo/Resources/Private/Partials/XmlSitemap
+      10 = {$plugin.tx_seo.view.partialRootPath}
+    }
+    layoutRootPaths {
+      0 = EXT:seo/Resources/Private/Layouts/XmlSitemap
+      10 = {$plugin.tx_seo.view.layoutRootPath}
+    }
+  }
+
+  config {
+    xmlSitemap {
+      sitemaps {
+        pages {
+          provider = TYPO3\CMS\Seo\XmlSitemap\PagesXmlSitemapDataProvider
+          config {
+            excludedDoktypes = {$plugin.tx_seo.settings.xmlSitemap.sitemaps.pages.excludedDoktypes}
+            additionalWhere = {$plugin.tx_seo.settings.xmlSitemap.sitemaps.pages.additionalWhere}
+          }
+        }
+      }
+    }
+  }
+}

typo3/sysext/seo/Documentation/Configuration/Index.rst

@@ -0,0 +1,190 @@
+.. include:: ../Includes.txt
+
+
+.. _configuration:
+
+=============
+Configuration
+=============
+
+Target group: **Developers, Integrators**
+
+
+TypoScript Settings
+===================
+
+There are a couple of TypoScript settings that can influence the output regarding search engine optimization.
+
+* `config.pageTitleFirst <https://docs.typo3.org/m/typo3/reference-typoscript/master/en-us/Setup/Config/Index.html#pagetitlefirst>`__
+* `config.pageTitleSeparator <https://docs.typo3.org/m/typo3/reference-typoscript/master/en-us/Setup/Config/Index.html#pagetitleseparator>`__
+* `config.pageTitleProviders <https://docs.typo3.org/m/typo3/reference-typoscript/master/en-us/Setup/Config/Index.html#pagetitleproviders>`__
+* `config.noPageTitle <https://docs.typo3.org/m/typo3/reference-typoscript/master/en-us/Setup/Config/Index.html#nopagetitle>`__
+
+Site configuration
+==================
+
+From version 9 of TYPO3, the configuration of sites is done with the Site Management module. As the settings for
+your websites are important for SEO purposes as well, please make sure you check the following fields.
+
+.. figure:: ../Images/site.png
+   :class: with-shadow
+   :alt: example site
+
+   Example site
+
+To get more in depth information about the site handling please refer to the :ref:`t3coreapi:sitehandling` docs.
+
+Domains
+-------
+
+Please ensure, that you have configured your sites so that they all have an entry point. This is used for
+generating the canonical tags, for example.
+
+.. warning::
+
+   Please be aware that for SEO purposes it is best practise to use a fully qualified domain (for example: https://www.example.com).
+   Therefor we don't support the SEO enhancements in TYPO3 without a full domain. It might work, but it is not officially
+   supported.
+
+Language
+--------
+
+Ensure, that you setup the languages correctly. All languages should have the right information in the :guilabel:`Locale`
+and :guilabel:`Language Tag` field. When set correctly, TYPO3 will automatically connect your page in the different languages
+for search engines. This it to ensure that the search engine knows which page to show when someone is searching in a
+specific language.
+
+.. hint::
+
+   Even if you have only one language, make sure your :guilabel:`Locale` and :guilabel:`Language Tag` fields are set correctly.
+   Giving wrong information to search engines will not help you to rank higher.
+
+See :ref:`t3coreapi:sitehandling-addingLanguages` for more details.
+
+Error pages
+-----------
+
+Although TYPO3 will respond with a HTTP status code 404 (Not found) when a page is not found, it is best practise to
+have a proper message telling the user that the page they requested is not available and to guide them to another
+page or for example to a search function of your website.
+
+See :ref:`t3coreapi:sitehandling-errorHandling` for more details.
+
+robots.txt
+----------
+
+The robots.txt is a powerful tool and should be used with care. It will deny or allow search engines to access your pages.
+By blocking access to your pages, search engines won't crawl these pages. You should make sure that this will not
+prevent the search engines from finding important pages.
+
+It is best practise to keep your robots.txt as clean as possible. An example of a minimal version of your robots.txt:
+
+.. code-block:: php
+
+   # This space intentionally left blank. Only add entries when you know how powerful the robots.txt is.
+   User-agent: *
+
+On :ref:`t3coreapi:sitehandling-staticRoutes` you can find more details on how to create a static route that will show
+this information when visiting https://www.example.com/robots.txt.
+
+When you want to disallow specific URLs, you can use the :ref:`index-page` option in the backend or set the robot HTTP
+header `X-Robots-tag` manually.
+
+Redirects
+---------
+
+Having correct redirects is a very important part of SEO. Especially the status code that is used for redirects is
+really important. Please use the appropriate status code for your use case.
+
+External Resources:
+
+* See `Tutorial of redirect module in TYPO3 <https://www.toujou.de/en/service/tutorials/redirects/>`__ by toujou
+* An `Overview which redirect to use in your situation <https://yoast.com/which-redirect/>`__ by Yoast
+
+.. _config-tags:
+
+Tags
+====
+
+.. _config-hreflang-tags:
+
+Hreflang Tags
+-------------
+
+The generation of the :html:`<link rel="alternate" hreflang="" href="" />`
+tags is done automatically if the page is available in other languages.
+This feature should work correctly in almost all cases.
+If you have a specific edge case, and you don't want TYPO3 to render those tags, you can disable rendering of the those tags completely.
+You just have to put this line in the :file:`ext_localconf.php` of an extension and make sure your extension is loaded after EXT:seo.
+
+.. code-block:: php
+
+   unset($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['hreflang']);
+
+.. _config-canonical-tag:
+
+Canonical Tag
+-------------
+
+Just like the hreflang tags, the :html:`<link rel="canonical" href="" />` tag is also generated automatically.
+If you have a specific edge case, and you don't want TYPO3 to render the tag, you can disable rendering completely.
+You just have to put this line in the :file:`ext_localconf.php` of an extension and make sure your extension is loaded after EXT:seo.
+
+.. code-block:: php
+
+   unset($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['canonical']);
+
+Working links
+=============
+
+Links in your website are quite important. You can use third party applications to check all your links, but you can
+also use the core extension linkvalidator to ensure, all the links in your site are working as expected.
+
+Please check the documentation of :ref:`linkvalidator:start` .
+
+TypoScript examples
+===================
+
+This section will provide you examples on how to configure several behaviours in the frontend.
+
+Setting fallbacks for og:image and twitter:image
+------------------------------------------------
+
+If you want to have a fallback og:image or twitter:image, you can use this little snippet.
+
+.. code-block:: typoscript
+
+   page {
+     meta {
+       og:image.stdWrap.cObject = IMG_RESOURCE
+       og:image.stdWrap.cObject {
+         file = EXT:your_extension/Resources/Public/Backend/OgImage.svg
+       }
+       twitter:image.stdWrap.cObject = IMG_RESOURCE
+       twitter:image.stdWrap.cObject {
+         file = EXT:your_extension/Resources/Public/Backend/TwitterCardImage.svg
+       }
+     }
+   }
+
+More information about the Meta Tag Api can be found on:
+
+* PHP :ref:`t3coreapi:metatagapi`
+* TypoScript :ref:`t3tsref:meta`
+
+Setting defaults for the author on meta tags
+--------------------------------------------
+
+This example shows how to set a default author based on the TypoScript constant :ts:`{$my.default.author}`:
+
+.. code-block:: typoscript
+
+   page {
+     meta {
+       author = {$my.default.author}
+     }
+   }
+
+.. seealso::
+
+   :ref:`recommendations_field_description`

typo3/sysext/seo/Documentation/Developer/Index.rst

@@ -0,0 +1,15 @@
+.. include:: ../Includes.txt
+
+
+.. _developer:
+
+================
+Developer Corner
+================
+
+When you work with a pages-only approach you most likely don't need to use the meta tag APIs. If you have a special
+edge-case or have a detail view to show a record, you need the APIs to render the corresponding meta information for your
+page. You can refer to the documentation of the following APIs:
+
+- The MetaTagApi (see :ref:`t3coreapi:metatagapi`) to define what metatags should be rendered on your page
+- The PageTitleAPI (see :ref:`t3coreapi:pagetitle`) will give you the possibility to set the title of the page

typo3/sysext/seo/Documentation/Editor/Index.rst

@@ -0,0 +1,192 @@
+.. include:: ../Includes.txt
+
+
+.. _for-editors:
+
+===========
+For Editors
+===========
+
+Target group: **Editors**
+
+Welcome to our small SEO introduction.
+We will explain the basic fields the TYPO3 core provides and introduce the SEO tools this way.
+
+All the following fields are part of the page record.
+
+You can reach it by:
+
+* Open the Web > Page module
+* Use the pen in the top bar icon to edit the page record
+
+An alternative way is to use the context menu.
+
+* Open Web > Page module
+* Right click the page you want to edit in the page tree
+* Select the Edit action
+
+General tab
+===========
+
+.. figure:: ../Images/tab-general.png
+   :class: with-shadow
+   :alt: General Tab in the TYPO3 Backend
+
+   General Tab in the TYPO3 Backend
+
+Page Title
+----------
+
+The page title field is used for several purposes. From a SEO perspective it is mainly used to define the default
+URL segment and as a fallback title if you don't set a specific SEO title. More information about the usage of the title
+fields can be found at :ref:`title-for-search-engines`.
+
+URL Segment
+-----------
+
+The URL segment is the part of the URL the user enters to access your page. Depending on your use case URLs have to
+fulfill certain criteria.
+
+By default the URL segment is based on the page tree and page title, but you can override this and set it yourself.
+
+If you want to optimize your page for search engines, it is recommended to have at least the keyword you want to be
+found on in your URL segment. Please make sure to check other best practises with your SEO specialist.
+
+SEO Tab
+=======
+
+.. figure:: ../Images/tab-seo.png
+   :class: with-shadow
+   :alt: SEO Tab in the TYPO3 Backend
+
+   SEO Tab in the TYPO3 Backend
+
+.. _title-for-search-engines:
+
+Title for search engines
+------------------------
+
+The :guilabel:`Title for search engines` field is used in the `<title>...</title>` tag of your web page. This title is used in the
+search results of search engines. There are some best practices for the value of this field.
+
+* Use a speaking title, which targets your audience
+* If possible, use the keywords you want to be found on in the title
+* Please make sure your title fits in a Google Snippet. You can use 3rd party extensions to help you with this.
+
+When no value for the :guilabel:`Title for search engines` field is defined, it will have a fallback to the field
+:guilabel:`Page title`. It will show the page title in the search results in that case.
+
+The title can have the name of the site as a prefix or suffix. The behaviour of this can be defined by an integrator.
+By default the title will have the name of the site as a suffix, separated by a dash.
+
+.. figure:: ../Images/google-preview.png
+   :class: with-shadow
+   :alt: Google result preview
+
+   Google result preview
+
+.. _index-page:
+
+Index this page
+---------------
+
+Defines whether the page should be indexed by a search engine or not.
+
+Follow this page
+----------------
+
+Defines whether search engines should follow the links on this page.
+
+Canonical link
+--------------
+
+You want to avoid duplicate content because your ranking can suffer from this. If you have duplicate content, you have to
+link to the origin of the content. This can be an internal page or an external page. You can use the default link wizard
+of TYPO3 to select the destination. If you don't set a canonical link yourself, TYPO3 will generate a link to the current
+page.
+
+.. hint::
+
+   Avoid duplicate content warnings by supplying the original source of this content.
+
+Metadata Tab
+============
+
+.. figure:: ../Images/tab-meta-data.png
+   :class: with-shadow
+   :alt: Metadata Tab in the TYPO3 Backend
+
+   Metadata tab in the TYPO3 Backend
+
+.. _description:
+
+Description
+-----------
+
+The description field is important for SEO purposes. This field is used to instruct search engines to use
+this text to show as a teaser of your page in the search result snippets. With this description, you can
+give the user a clear overview of the topic of this page.
+
+.. figure:: ../Images/google-preview.png
+   :class: with-shadow
+   :alt: Google result preview
+
+   Google result preview
+
+.. hint::
+
+   It is best practises to at least use the keywords you want to be found on in this description. Make sure the
+   description is not too long, so it fits in the search result snippets.
+
+Social media
+============
+
+.. figure:: ../Images/tab-social-media.png
+   :class: with-shadow
+   :alt: Social Media Tab in the TYPO3 Backend
+
+   Social Media Tab in the TYPO3 Backend
+
+The social media tab contains information which is used to enrich the snippet that is shown when visitors share your URLs
+in social networks, modern browsers etc.
+
+TYPO3 offers to have different content for OpenGraph (used for example by Facebook and LinkedIn) and Twitter Cards
+(used on Twitter of course). Both implementations allow you to set a title, a description and to provide an image. When this
+information is not set manually, the social network will decide itself what to show. Most probably it will use the
+information from :ref:`title-for-search-engines` and :ref:`description`.
+
+.. figure:: ../Images/social-preview-no-image.png
+   :class: with-shadow
+   :alt: Facebook preview without image
+
+   Facebook preview without image
+
+Title
+-----
+
+This title can be specified to be shown as the title of the snippet preview when your page is shared on the social
+network. You only have to fill this field when you want a different title as in the search results.
+
+Description
+-----------
+
+Used to adjust the description of the preview snippet when your page is shared at a social network. You only have to
+fill this field when you want a different description as the description in the search results.
+
+Image
+-----
+
+You can specify the image that should be shown when your page is shared on a social network. Please be aware that the
+different social networks need specific dimensions for an image. TYPO3 ships with the most used dimension. If you want
+to have more dimensions, please let your integrator add more dimensions.
+
+.. hint::
+
+   It is best practise to add an image for social networks so your result will stand out and will be easily recognizable.
+
+
+.. figure:: ../Images/social-preview-image.png
+   :class: with-shadow
+   :alt: Facebook preview with image
+
+   Facebook preview with image

typo3/sysext/seo/Documentation/GeneralRecommendations/Index.rst

@@ -0,0 +1,51 @@
+.. include:: ../Includes.txt
+
+
+.. _recommendations:
+
+=======================
+General Recommendations
+=======================
+
+.. _recommendations_extensions:
+
+Recommendations for additional seo extensions
+=============================================
+
+The TYPO3 core ships the whole API and the needed fields to have all necessary technical SEO.
+
+Besides that, there are lots of tools you can use to optimize your rankings.
+
+If you install additional SEO extensions in TYPO3 make sure you check the following recommendations:
+
+* The extension **should** stick to the core fields where possible
+* The extension **should** stick to the core behaviour where possible
+* The extension **could** extend TCA with additional helpers for your editors, like:
+
+  * Readability checks
+  * Keyword and content checks
+  * Previews
+  * Page speed insights
+
+Some of these tools might need external services, others can work completely on-premise.
+
+.. _recommendations_field_description:
+
+Recommendations for the description field
+=========================================
+
+.. danger::
+
+   Current state of SEO research states that the description should be either lovely crafted by hand,
+   of left our completely. (end of 2019)
+
+   If you are unsure contact an expert.
+
+.. youtube:: W4gr88oHb-k
+
+* Duplicate meta descriptions should only be used under specific circumstances
+* Duplicate meta descriptions should only be used on a few pages
+* Leave the description empty if you do not can provide one
+* Provide an engaging explanation of your page, to ensure people will be motivated to visit your site
+* If SEO is not your thing, get professional help
+

typo3/sysext/seo/Documentation/Includes.txt

@@ -0,0 +1,23 @@
+.. ==================================================
+.. FOR YOUR INFORMATION
+.. --------------------------------------------------
+.. -*- coding: utf-8 -*- with BOM.
+
+.. This is 'Includes.txt'. It is included at the very top of each and
+   every ReST source file in this documentation project (= manual).
+
+
+.. ==================================================
+.. DEFINE SOME TEXT ROLES
+.. --------------------------------------------------
+
+.. role::   typoscript(code)
+
+.. role::   ts(typoscript)
+   :class:  typoscript
+
+.. role::   php(code)
+
+.. role::   html(code)
+
+.. highlight:: php

typo3/sysext/seo/Documentation/Index.rst

@@ -0,0 +1,70 @@
+.. every .rst file should include Includes.txt
+.. use correct path!
+
+.. include:: Includes.txt
+
+
+.. Every manual should have a start label for cross-referencing to
+.. start page. Do not remove this!
+
+.. _start:
+
+==================
+SEO Core extension
+==================
+
+:Extension key:
+      seo
+
+:Version:
+      |release|
+
+:Language:
+      en
+
+:Description:
+      Manual for our SEO extension, which adds basic SEO features to TYPO3.
+
+:Keywords:
+      seo, google, meta tags, search engine optimization, sitemap
+
+:Copyright:
+      2018-2021
+
+:Author:
+      TYPO3 CMS Core Development Team
+
+:License:
+      Open Content License available from `www.opencontent.org/opl.shtml
+      <http://www.opencontent.org/opl.shtml>`_
+
+:Rendered:
+      |today|
+
+The content of this document is related to TYPO3,
+
+a GNU/GPL CMS/Framework available from `www.typo3.org
+<http://www.typo3.org/>`_
+
+**TYPO3**
+
+   The content of this document is related to TYPO3 CMS,
+   a GNU/GPL CMS/Framework available from `typo3.org
+   <https://typo3.org/>`_ .
+
+**For Contributors**
+
+   You are welcome to help improve this guide. Just click on "Edit me on GitHub"
+   on the top right to submit your change request.
+
+**Table of Contents**
+
+.. toctree::
+   :maxdepth: 3
+
+   Introduction/Index
+   Editor/Index
+   Installation/Index
+   Configuration/Index
+   Developer/Index
+   GeneralRecommendations/Index

typo3/sysext/seo/Documentation/Installation/Index.rst

@@ -0,0 +1,56 @@
+.. include:: ../Includes.txt
+
+
+
+.. _installation:
+
+============
+Installation
+============
+
+Target group: **Administrators**
+
+This extension is part of the TYPO3 core.
+
+Installation with composer
+==========================
+
+Check whether you are already using the extension with
+
+.. code-block:: bash
+
+   composer show | grep seo
+
+This should either give you no result or something similar to:
+
+.. code-block:: bash
+
+   typo3/cms-seo                                    v9.5.10            SEO features for TYPO3.
+
+If it is not yet installed, use the ``composer require`` command to install the extension
+
+.. code-block:: bash
+
+   composer require typo3/cms-seo ^9.5
+
+The given version depends on the version of the TYPO3 core you are using.
+
+Now head over to the extension manager and activate the extension.
+
+.. figure:: ../Images/em.png
+   :class: with-shadow
+   :alt: Extension manager with filtered seo ext
+
+   Extension manager with filtered seo ext
+
+Installation without composer
+=============================
+
+In an installation without composer, the code of EXT:seo is already shipped. You just have to activate the extension.
+Head over to the extension manager and activate the extension.
+
+.. figure:: ../Images/em.png
+   :class: with-shadow
+   :alt: Extension manager with filtered seo ext
+
+   Extension manager with filtered seo ext

typo3/sysext/seo/Documentation/Introduction/Index.rst

@@ -0,0 +1,85 @@
+.. include:: ../Includes.txt
+
+
+.. _introduction:
+
+============
+Introduction
+============
+
+What does it do?
+================
+
+The goal of the core extension "seo" is to make sure basic technical Search Engine Optimization (SEO) is done right
+out of the box. Specific fields for SEO purposes are added, as well as the rendering of HTML meta tags in the frontend.
+
+There are several things you can do to optimize your site for search engines.
+Some tasks are only solvable with good human writers, others are technical tasks, which just need to be implemented.
+
+The goal of the extension seo is to help you with the following parts of your seo journey.
+
+* Give editors all the fields needed to set the necessary meta tags
+* Provide the rendering of meta tags in the frontend for SEO related information, to avoid reimplementing it again and again
+* Provide stable APIs for developers to give them the chance to change the behaviour when needed in edge cases
+
+This manual will not cover all the developer information, as these are covered in the TYPO3 API documentation.
+
+.. _screenshots:
+
+Screenshots
+===========
+
+.. figure:: ../Images/tab-general.png
+   :class: with-shadow
+   :alt: General Tab in the TYPO3 Backend
+
+   General Tab in the TYPO3 Backend
+
+.. figure:: ../Images/tab-seo.png
+   :class: with-shadow
+   :alt: SEO Tab in the TYPO3 Backend
+
+   SEO Tab in the TYPO3 Backend
+
+.. figure:: ../Images/tab-meta-data.png
+   :class: with-shadow
+   :alt: Metadata Tab in the TYPO3 Backend
+
+   Metadata Tab in the TYPO3 Backend
+
+Hreflang Tags
+=============
+"hreflang" tags are added automatically for multi language websites based on the one-tree principle. The links are
+based on the Site configuration and depending on translations of a page.
+
+The :html:`x-default` href is the link of the current page in the default language.
+
+The value of :html:`hreflang` is set for each language in the :guilabel:`Sites module` (see :ref:`t3coreapi:sitehandling-addingLanguages`)
+
+Canonical Tags
+==============
+
+TYPO3 provides built-in support for the canonical tag.
+
+If the core extension "seo" is installed, it will automatically add the canonical link to the page.
+
+The canonical link is basically the same absolute link as the link to the current hreflang and is meant
+to indicate where the original source of the content is. It is a tool to prevent duplicate content
+penalties.
+
+In the page properties, the canonical link can be overwritten per language. The link wizard offers all
+possibilities including external links and link handler configurations.
+
+If no canonical link is given manually, TYPO3 will generate a canonicalized URL to the current page in the current
+language.
+
+.. warning::
+    If you have other SEO extensions installed that generate canonical links, you have to make sure only one creates it.
+    If both core and an extension are generating a canonical link, it will result in 2 canonical links which might
+    cause confusion for search engines.
+
+XML Sitemap
+===========
+
+See :ref:`t3coreapi:xmlsitemap` for the documentation how to configure your XML sitemaps.
+

typo3/sysext/seo/Documentation/Settings.cfg

@@ -0,0 +1,43 @@
+[general]
+
+; endless list of all of the general simple settings
+; you can use in 'conf.py'
+
+project     = Search engine optimization (seo)
+version     = latest (10-dev)
+release     = latest (10-dev)
+t3author    = TYPO3 Core Team + Contributors, TYPO3 Documentation Team
+copyright   = 2018-2021
+
+description = This documentation is about TYPO3's system extension
+              "seo" which provides provides search engine optimizations
+
+[html_theme_options]
+
+; for theme t3SphinxThemeRtd
+
+# Add 'Edit me on Github' button
+github_branch             = master
+github_repository         = typo3/typo3
+path_to_documentation_dir = typo3/sysext/seo/Documentation
+
+# show as related links
+project_contact      =
+project_discussions  = http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-project-content-rendering
+project_home         = https://forge.typo3.org/projects/typo3cms-core
+project_issues       = https://forge.typo3.org/projects/typo3cms-core/issues
+project_repository   = https://github.com/typo3/typo3
+
+
+[intersphinx_mapping]
+
+# These are common mappings. Uncomment only what you really use!
+# see https://docs.typo3.org/m/typo3/docs-how-to-document/master/en-us/GeneralConventions/DirectoryFilenames.html#intersphinx-mapping
+
+h2document    = https://docs.typo3.org/m/typo3/docs-how-to-document/master/en-us/
+
+t3coreapi     = https://docs.typo3.org/m/typo3/reference-coreapi/9.5/en-us/
+t3install     = https://docs.typo3.org/m/typo3/guide-installation/9.5/en-us/
+t3tsref       = https://docs.typo3.org/m/typo3/reference-typoscript/9.5/en-us/
+
+linkvalidator   = https://docs.typo3.org/c/typo3/cms-linkvalidator/9.5/en-us/

typo3/sysext/seo/LICENSE.txt

@@ -0,0 +1,345 @@
+Some icons used in the TYPO3 project are retrieved from the "Silk" icon set of
+Mark James, which can be found at http://famfamfam.com/lab/icons/silk/. This
+set is distributed under a Creative Commons Attribution 2.5 License. The
+license can be found at http://creativecommons.org/licenses/by/2.5/.
+---------------------------------
+
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+License is intended to guarantee your freedom to share and change free
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+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
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+
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+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
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+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
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+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
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+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

typo3/sysext/seo/Resources/Private/Language/locallang_tca.xlf

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xliff version="1.0" xmlns:t3="http://typo3.org/schemas/xliff">
+	<file t3:id="1528554340" source-language="en" datatype="plaintext" original="EXT:seo/Resources/Private/Language/locallang_tca.xlf" date="2018-08-09T16:22:32Z"
+		  product-name="seo">
+		<header/>
+		<body>
+			<trans-unit id="pages.tabs.seo" resname="pages.tabs.seo">
+				<source>SEO</source>
+			</trans-unit>
+			<trans-unit id="pages.palettes.seo" resname="pages.palettes.seo">
+				<source>General SEO settings</source>
+			</trans-unit>
+			<trans-unit id="pages.seo_title" resname="pages.seo_title">
+				<source>Title for search engines</source>
+			</trans-unit>
+			<trans-unit id="pages.palettes.robots" resname="pages.palettes.robots">
+				<source>Robot instructions</source>
+			</trans-unit>
+			<trans-unit id="pages.no_index" resname="pages.no_index">
+				<source>No index</source>
+			</trans-unit>
+			<trans-unit id="pages.no_index_formlabel" resname="pages.no_index_formlabel">
+				<source>Index this page</source>
+			</trans-unit>
+			<trans-unit id="pages.no_follow" resname="pages.no_follow">
+				<source>No follow</source>
+			</trans-unit>
+			<trans-unit id="pages.no_follow_formlabel" resname="pages.no_follow_formlabel">
+				<source>Follow this page</source>
+			</trans-unit>
+			<trans-unit id="pages.palettes.opengraph" resname="pages.palettes.opengraph">
+				<source>Open Graph (Facebook)</source>
+			</trans-unit>
+			<trans-unit id="pages.og_title" resname="pages.og_title">
+				<source>Title</source>
+			</trans-unit>
+			<trans-unit id="pages.og_description" resname="pages.og_description">
+				<source>Description</source>
+			</trans-unit>
+			<trans-unit id="pages.og_image" resname="pages.og_image">
+				<source>Image</source>
+			</trans-unit>
+			<trans-unit id="pages.palettes.twittercards" resname="pages.palettes.twittercards">
+				<source>Twitter Cards</source>
+			</trans-unit>
+			<trans-unit id="pages.twitter_title" resname="pages.twitter_title">
+				<source>Title</source>
+			</trans-unit>
+			<trans-unit id="pages.twitter_description" resname="pages.twitter_description">
+				<source>Description</source>
+			</trans-unit>
+			<trans-unit id="pages.twitter_image" resname="pages.twitter_image">
+				<source>Image</source>
+			</trans-unit>
+			<trans-unit id="pages.palettes.canonical" resname="pages.palettes.canonical">
+				<source>Canonical</source>
+			</trans-unit>
+			<trans-unit id="pages.canonical_link" resname="pages.canonical_link">
+				<source>Canonical link</source>
+			</trans-unit>
+			<trans-unit id="pages.tabs.socialmedia" resname="pages.tabs.socialmedia">
+				<source>Social media</source>
+			</trans-unit>
+		</body>
+	</file>
+</xliff>

typo3/sysext/seo/Resources/Private/Templates/XmlSitemap/Index.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="{xslFile}"?>
+
+<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+    <f:for each="{sitemaps}" as="sitemap">
+        <sitemap>
+            <f:spaceless>
+                <f:if condition="{sitemap.page}">
+                    <f:then><loc><f:uri.page pageType="{type}" additionalParams="{sitemap: sitemap.key, page: sitemap.page}" absolute="true" noCacheHash="false" /></loc></f:then>
+                    <f:else><loc><f:uri.page pageType="{type}" additionalParams="{sitemap: sitemap.key}" absolute="true" noCacheHash="false" /></loc></f:else>
+                </f:if>
+            </f:spaceless>
+            <lastmod>{sitemap.lastMod -> f:format.date(format: 'c')}</lastmod>
+        </sitemap>
+    </f:for>
+</sitemapindex>

typo3/sysext/seo/Resources/Private/Templates/XmlSitemap/Sitemap.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="{xslFile}"?>
+
+<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd http://www.google.com/schemas/sitemap-image/1.1 http://www.google.com/schemas/sitemap-image/1.1/sitemap-image.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+    <f:for each="{items}" as="item">
+        <f:if condition="{item.loc}">
+            <url>
+                <loc>{item.loc}</loc>
+                <lastmod>{item.lastMod -> f:format.date(format: 'c')}</lastmod>
+            </url>
+        </f:if>
+    </f:for>
+</urlset>

typo3/sysext/seo/Resources/Public/CSS/Sitemap.xsl

@@ -0,0 +1,130 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet version="2.0"
+                xmlns:html="http://www.w3.org/TR/REC-html40"
+                xmlns:image="http://www.google.com/schemas/sitemap-image/1.1"
+                xmlns:sitemap="http://www.sitemaps.org/schemas/sitemap/0.9"
+                xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+    <xsl:output method="html" version="1.0" encoding="UTF-8" indent="yes"/>
+    <xsl:template match="/">
+        <html xmlns="http://www.w3.org/1999/xhtml">
+            <head>
+                <title>TYPO3 XML Sitemap</title>
+                <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+                <style type="text/css">
+                    body {
+                        font-family: Helvetica, Arial, sans-serif;
+                        font-size: 13px;
+                        color: #545353;
+                    }
+                    table {
+                        border: none;
+                        border-collapse: collapse;
+                    }
+                    #sitemap tr:nth-child(odd) td {
+                        background-color: #eee !important;
+                    }
+                    #sitemap tbody tr:hover td {
+                        background-color: #ccc;
+                    }
+                    #sitemap tbody tr:hover td, #sitemap tbody tr:hover td a {
+                        color: #000;
+                    }
+                    #content {
+                        margin: 0 auto;
+                        width: 1000px;
+                    }
+                    .expl {
+                        margin: 18px 3px;
+                        line-height: 1.2em;
+                    }
+                    a {
+                        color: #000;
+                        text-decoration: none;
+                    }
+                    a:visited {
+                        color: #777;
+                    }
+                    a:hover {
+                        text-decoration: underline;
+                    }
+                    td {
+                        font-size:11px;
+                    }
+                    th {
+                        text-align:left;
+                        padding-right:30px;
+                        font-size:11px;
+                    }
+                    thead th {
+                        border-bottom: 1px solid #000;
+                    }
+                </style>
+            </head>
+            <body>
+                <div id="content">
+                    <h1>TYPO3 XML Sitemap</h1>
+                    <xsl:if test="count(sitemap:sitemapindex/sitemap:sitemap) &gt; 0">
+                        <p class="expl">
+                            This XML Sitemap Index file contains <xsl:value-of select="count(sitemap:sitemapindex/sitemap:sitemap)"/> sitemaps.
+                        </p>
+                        <table id="sitemap" cellpadding="3" width="100%">
+                            <thead>
+                                <tr>
+                                    <th>Sitemap</th>
+                                    <th>Last modified</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                <xsl:for-each select="sitemap:sitemapindex/sitemap:sitemap">
+                                    <xsl:variable name="sitemapURL">
+                                        <xsl:value-of select="sitemap:loc"/>
+                                    </xsl:variable>
+                                    <tr>
+                                        <td>
+                                            <a href="{$sitemapURL}"><xsl:value-of select="sitemap:loc"/></a>
+                                        </td>
+                                        <td>
+                                            <a href="{$sitemapURL}"><xsl:value-of select="sitemap:lastmod"/></a>
+                                        </td>
+                                    </tr>
+                                </xsl:for-each>
+                            </tbody>
+                        </table>
+                    </xsl:if>
+                    <xsl:if test="count(sitemap:sitemapindex/sitemap:sitemap) &lt; 1">
+                        <p class="expl">
+                            This XML Sitemap contains <xsl:value-of select="count(sitemap:urlset/sitemap:url)"/> URLs.
+                        </p>
+                        <table id="sitemap" cellpadding="3" width="100%">
+                            <thead>
+                                <tr>
+                                    <th width="80%">URL</th>
+                                    <th title="Last Modification Time" width="20%">Last Mod.</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                <xsl:variable name="lower" select="'abcdefghijklmnopqrstuvwxyz'"/>
+                                <xsl:variable name="upper" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ'"/>
+                                <xsl:for-each select="sitemap:urlset/sitemap:url">
+                                    <tr>
+                                        <td>
+                                            <xsl:variable name="itemURL">
+                                                <xsl:value-of select="sitemap:loc"/>
+                                            </xsl:variable>
+                                            <a href="{$itemURL}">
+                                                <xsl:value-of select="sitemap:loc"/>
+                                            </a>
+                                        </td>
+                                        <td>
+                                            <xsl:value-of select="concat(substring(sitemap:lastmod,0,11),concat(' ', substring(sitemap:lastmod,12,5)),concat(' ', substring(sitemap:lastmod,20,6)))"/>
+                                        </td>
+                                    </tr>
+                                </xsl:for-each>
+                            </tbody>
+                        </table>
+                    </xsl:if>
+                </div>
+            </body>
+        </html>
+    </xsl:template>
+</xsl:stylesheet>

typo3/sysext/seo/composer.json

@@ -0,0 +1,41 @@
+{
+	"name": "typo3/cms-seo",
+	"type": "typo3-cms-framework",
+	"description": "SEO features for TYPO3.",
+	"homepage": "https://typo3.org",
+	"license": ["GPL-2.0-or-later"],
+	"authors": [{
+		"name": "TYPO3 Core Team",
+		"email": "typo3cms@typo3.org",
+		"role": "Developer"
+	}],
+	"config": {
+		"sort-packages": true
+	},
+	"require": {
+		"typo3/cms-core": "9.5.31",
+		"typo3/cms-frontend": "9.5.31",
+		"typo3/cms-extbase": "9.5.31"
+	},
+	"conflict": {
+		"typo3/cms": "*"
+	},
+	"extra": {
+		"typo3/cms": {
+			"extension-key": "seo",
+			"Package": {
+				"partOfFactoryDefault": true
+			}
+		}
+	},
+	"autoload": {
+		"psr-4": {
+			"TYPO3\\CMS\\Seo\\": "Classes/"
+		}
+	},
+	"autoload-dev": {
+		"psr-4": {
+			"TYPO3\\CMS\\Seo\\Tests\\": "Tests/"
+		}
+	}
+}

typo3/sysext/seo/ext_emconf.php

@@ -0,0 +1,21 @@
+<?php
+$EM_CONF[$_EXTKEY] = [
+    'title' => 'SEO',
+    'description' => 'Add basic SEO features to TYPO3',
+    'category' => 'fe',
+    'author' => 'TYPO3 Core Team',
+    'author_email' => 'typo3cms@typo3.org',
+    'author_company' => '',
+    'state' => 'stable',
+    'uploadfolder' => 0,
+    'createDirs' => '',
+    'clearCacheOnLoad' => 0,
+    'version' => '9.5.31',
+    'constraints' => [
+        'depends' => [
+            'typo3' => '9.5.31'
+        ],
+        'conflicts' => [],
+        'suggests' => [],
+    ],
+];

typo3/sysext/seo/ext_localconf.php

@@ -0,0 +1,31 @@
+<?php
+defined('TYPO3_MODE') or die();
+
+$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['metatag'] =
+    \TYPO3\CMS\Seo\MetaTag\MetaTagGenerator::class . '->generate';
+$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['hreflang'] =
+    \TYPO3\CMS\Seo\HrefLang\HrefLangGenerator::class . '->generate';
+$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['TYPO3\CMS\Frontend\Page\PageGenerator']['generateMetaTags']['canonical'] =
+    \TYPO3\CMS\Seo\Canonical\CanonicalGenerator::class . '->generate';
+
+$metaTagManagerRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\MetaTag\MetaTagManagerRegistry::class);
+$metaTagManagerRegistry->registerManager(
+    'opengraph',
+    \TYPO3\CMS\Seo\MetaTag\OpenGraphMetaTagManager::class
+);
+$metaTagManagerRegistry->registerManager(
+    'twitter',
+    \TYPO3\CMS\Seo\MetaTag\TwitterCardMetaTagManager::class
+);
+unset($metaTagManagerRegistry);
+
+// Add module configuration
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScriptSetup(trim('
+    config.pageTitleProviders {
+        seo {
+            provider = TYPO3\CMS\Seo\PageTitle\SeoTitlePageTitleProvider
+            before = record
+            after = altPageTitle
+        }
+    }
+'));

typo3/sysext/seo/ext_tables.sql

@@ -0,0 +1,15 @@
+#
+# Table structure for table 'pages'
+#
+CREATE TABLE pages (
+	seo_title varchar(255) DEFAULT '' NOT NULL,
+	no_index tinyint(4) DEFAULT '0' NOT NULL,
+	no_follow tinyint(4) DEFAULT '0' NOT NULL,
+	og_title varchar(255) DEFAULT '' NOT NULL,
+	og_description text,
+	og_image int(11) unsigned DEFAULT '0' NOT NULL,
+	twitter_title varchar(255) DEFAULT '' NOT NULL,
+	twitter_description text,
+	twitter_image int(11) unsigned DEFAULT '0' NOT NULL,
+	canonical_link varchar(2048) DEFAULT '' NOT NULL,
+);