Implement SEO overview as backend module

public/typo3conf/ext/ep_theme/Classes/Controller/BackendController.php

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+<?php
+
+namespace EP\EpTheme\Controller;
+
+/***************************************************************
+ *
+ *  Copyright notice
+ *
+ *  (c) 2020 Björn Fromme <[email protected]>, dreipunktnull
+ *
+ *  All rights reserved
+ *
+ *  This script is part of the TYPO3 project. The TYPO3 project 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *
+ *  This script is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+use EP\EpTheme\Domain\Repository\PageRepository;
+use TYPO3\CMS\Backend\View\BackendTemplateView;
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;
+
+class BackendController extends ActionController
+{
+    /**
+     * Backend Template Container
+     *
+     * @var BackendTemplateView
+     */
+    protected $defaultViewObjectName = BackendTemplateView::class;
+
+    /**
+     * BackendTemplateContainer
+     *
+     * @var BackendTemplateView
+     */
+    protected $view;
+
+    /**
+     * @var int
+     */
+    protected $pageUid;
+
+    /**
+     * @var PageRepository
+     */
+    protected $pageRepository;
+
+    /**
+     * @param PageRepository $pageRepository
+     */
+    public function __construct(PageRepository $pageRepository)
+    {
+        parent::__construct();
+
+        $this->pageRepository = $pageRepository;
+    }
+
+    public function initializeAction()
+    {
+        $this->pageUid = (integer)GeneralUtility::_GET('id');
+
+        parent::initializeAction();
+    }
+
+    public function listPagesAction()
+    {
+        $pages = $this->pageRepository->findPagesByPid($this->pageUid);
+
+        $this->view->assign('pages', $pages);
+    }
+}

public/typo3conf/ext/ep_theme/Classes/Domain/Model/Page.php

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+<?php
+
+namespace EP\EpTheme\Domain\Model;
+
+use TYPO3\CMS\Extbase\DomainObject\AbstractEntity;
+
+class Page extends AbstractEntity
+{
+    /**
+     * @var int
+     */
+    protected $uid;
+
+    /**
+     * @var int
+     */
+    protected $pid;
+
+    /**
+     * @var bool
+     */
+    protected $hidden;
+
+    /**
+     * @var string
+     */
+    protected $title;
+
+    /**
+     * @var string
+     */
+    protected $seoTitle;
+
+    /**
+     * @var string
+     */
+    protected $description;
+
+    /**
+     * @return int
+     */
+    public function getUid()
+    {
+        return $this->uid;
+    }
+
+    /**
+     * @param int $uid
+     */
+    public function setUid($uid)
+    {
+        $this->uid = $uid;
+    }
+
+    /**
+     * @return int
+     */
+    public function getPid()
+    {
+        return $this->pid;
+    }
+
+    /**
+     * @param int $pid
+     */
+    public function setPid($pid)
+    {
+        $this->pid = $pid;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isHidden()
+    {
+        return $this->hidden;
+    }
+
+    /**
+     * @param bool $hidden
+     */
+    public function setHidden($hidden)
+    {
+        $this->hidden = $hidden;
+    }
+
+    /**
+     * @return string
+     */
+    public function getTitle()
+    {
+        return $this->title;
+    }
+
+    /**
+     * @param string $title
+     */
+    public function setTitle($title)
+    {
+        $this->title = $title;
+    }
+
+    /**
+     * @return string
+     */
+    public function getSeoTitle()
+    {
+        return $this->seoTitle;
+    }
+
+    /**
+     * @param string $seoTitle
+     */
+    public function setSeoTitle($seoTitle)
+    {
+        $this->seoTitle = $seoTitle;
+    }
+
+    /**
+     * @return string
+     */
+    public function getDescription()
+    {
+        return $this->description;
+    }
+
+    /**
+     * @param string $description
+     */
+    public function setDescription($description)
+    {
+        $this->description = $description;
+    }
+}

public/typo3conf/ext/ep_theme/Classes/Domain/Repository/PageRepository.php

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+<?php
+
+namespace EP\EpTheme\Domain\Repository;
+
+use TYPO3\CMS\Extbase\Persistence\Repository;
+
+class PageRepository extends Repository
+{
+    /**
+     * @var array
+     */
+    protected $defaultOrderings = [
+        'sorting' => 'ASC',
+    ];
+
+    /**
+     * @param int $pid
+     * @return array|\TYPO3\CMS\Extbase\Persistence\QueryResultInterface
+     */
+    public function findPagesByPid($pid)
+    {
+        $query = $this->createQuery();
+        $query
+            ->getQuerySettings()
+            ->setRespectStoragePage(false)
+            ->setIgnoreEnableFields(true)
+            ->setIncludeDeleted(false)
+            ->setRespectSysLanguage(false)
+        ;
+        $query->matching($query->logicalAnd([
+                $query->equals('pid', $pid),
+                $query->equals('doktype', \TYPO3\CMS\Frontend\Page\PageRepository::DOKTYPE_DEFAULT)
+        ]));
+
+        return $query->execute();
+    }
+}