From 864809ba822df11e4643734ca5c26cc28ae5057b Mon Sep 17 00:00:00 2001
From: Benni Mack <benni@typo3.org>
Date: Fri, 31 Jul 2020 11:35:08 +0200
Subject: [PATCH] [TASK] Initial commit

---
 .../Collection/RecordCollectionRepository.php | 236 ++++++++++++
 Classes/Collection/StaticRecordCollection.php | 204 +++++++++++
 Configuration/TCA/sys_collection.php          | 194 ++++++++++
 LICENSE.txt                                   | 339 ++++++++++++++++++
 Migrations/Code/ClassAliasMap.php             |   5 +
 README.md                                     |  38 ++
 Resources/Private/Language/locallang_tca.xlf  |  29 ++
 .../RecordCollectionRepositoryTest.php        | 335 +++++++++++++++++
 .../Tca/CollectionVisibleFieldsTest.php       |  57 +++
 composer.json                                 |  35 ++
 ext_emconf.php                                |  22 ++
 ext_tables.sql                                |  24 ++
 12 files changed, 1518 insertions(+)
 create mode 100644 Classes/Collection/RecordCollectionRepository.php
 create mode 100644 Classes/Collection/StaticRecordCollection.php
 create mode 100644 Configuration/TCA/sys_collection.php
 create mode 100644 LICENSE.txt
 create mode 100644 Migrations/Code/ClassAliasMap.php
 create mode 100644 README.md
 create mode 100644 Resources/Private/Language/locallang_tca.xlf
 create mode 100644 Tests/Functional/Collection/RecordCollectionRepositoryTest.php
 create mode 100644 Tests/Functional/Tca/CollectionVisibleFieldsTest.php
 create mode 100644 composer.json
 create mode 100644 ext_emconf.php
 create mode 100644 ext_tables.sql

diff --git a/Classes/Collection/RecordCollectionRepository.php b/Classes/Collection/RecordCollectionRepository.php
new file mode 100644
index 0000000..0a4daad
--- /dev/null
+++ b/Classes/Collection/RecordCollectionRepository.php
@@ -0,0 +1,236 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the TYPO3 Extension "legacy_collections".
+ *
+ * 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!
+ */
+
+namespace FriendsOfTYPO3\LegacyCollections\Collection;
+
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Database\Query\Restriction\DeletedRestriction;
+use TYPO3\CMS\Core\Database\Query\Restriction\FrontendRestrictionContainer;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
+
+/**
+ * Implements the repository for record collections.
+ */
+class RecordCollectionRepository
+{
+    /**
+     * @var string
+     */
+    const TYPE_Static = 'static';
+
+    /**
+     * Name of the table the collection records are stored to
+     *
+     * @var string
+     */
+    protected $table = 'sys_collection';
+
+    /**
+     * @var string
+     */
+    protected $typeField = 'type';
+
+    /**
+     * @var string
+     */
+    protected $tableField = 'table_name';
+
+    /**
+     * Finds a record collection by uid.
+     *
+     * @param int $uid The uid to be looked up
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection|null
+     */
+    public function findByUid($uid)
+    {
+        $result = null;
+        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable($this->table);
+
+        if ($this->getEnvironmentMode() === 'FE') {
+            $queryBuilder->setRestrictions(GeneralUtility::makeInstance(FrontendRestrictionContainer::class));
+        } else {
+            $queryBuilder->getRestrictions()
+                ->removeAll()
+                ->add(GeneralUtility::makeInstance(DeletedRestriction::class));
+        }
+
+        $data = $queryBuilder->select('*')
+            ->from($this->table)
+            ->where($queryBuilder->expr()->eq('uid', $queryBuilder->createNamedParameter($uid, \PDO::PARAM_INT)))
+            ->execute()
+            ->fetch();
+        if (is_array($data)) {
+            $result = $this->createDomainObject($data);
+        }
+        return $result;
+    }
+
+    /**
+     * Finds all record collections.
+     *
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection[]|null
+     */
+    public function findAll()
+    {
+        return $this->queryMultipleRecords();
+    }
+
+    /**
+     * Finds record collections by table name.
+     *
+     * @param string $tableName Name of the table to be looked up
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection[]
+     */
+    public function findByTableName($tableName)
+    {
+        $expressionBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getQueryBuilderForTable($tableName)
+            ->expr();
+
+        return $this->queryMultipleRecords([
+            $expressionBuilder->eq($this->tableField, $expressionBuilder->literal($tableName))
+        ]);
+    }
+
+    /**
+     * Finds record collection by type.
+     *
+     * @param string $type Type to be looked up
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection[]|null
+     */
+    public function findByType($type)
+    {
+        $expressionBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getQueryBuilderForTable($this->table)
+            ->expr();
+
+        return $this->queryMultipleRecords([
+            $expressionBuilder->eq($this->typeField, $expressionBuilder->literal($type))
+        ]);
+    }
+
+    /**
+     * Finds record collections by type and table name.
+     *
+     * @param string $type Type to be looked up
+     * @param string $tableName Name of the table to be looked up
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection[]|null
+     */
+    public function findByTypeAndTableName($type, $tableName)
+    {
+        $expressionBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getQueryBuilderForTable($this->table)
+            ->expr();
+
+        return $this->queryMultipleRecords([
+            $expressionBuilder->eq($this->typeField, $expressionBuilder->literal($type)),
+            $expressionBuilder->eq($this->tableField, $expressionBuilder->literal($tableName))
+        ]);
+    }
+
+    /**
+     * Deletes a record collection by uid.
+     *
+     * @param int $uid uid to be deleted
+     */
+    public function deleteByUid($uid)
+    {
+        GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getConnectionForTable($this->table)
+            ->update(
+                $this->table,
+                ['deleted' => 1, 'tstamp' => (int)$GLOBALS['EXEC_TIME']],
+                ['uid' => (int)$uid]
+            );
+    }
+
+    /**
+     * Queries for multiple records for the given conditions.
+     *
+     * @param array $conditions Conditions concatenated with AND for query
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection[]|null
+     */
+    protected function queryMultipleRecords(array $conditions = [])
+    {
+        $result = null;
+
+        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable($this->table);
+        $queryBuilder->getRestrictions()
+            ->removeAll()
+            ->add(GeneralUtility::makeInstance(DeletedRestriction::class));
+
+        $queryBuilder->select('*')
+            ->from($this->table);
+
+        if (!empty($conditions)) {
+            $queryBuilder->where(...$conditions);
+        }
+
+        $data = $queryBuilder->execute()->fetchAll();
+        if (!empty($data)) {
+            $result = $this->createMultipleDomainObjects($data);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Creates a record collection domain object.
+     *
+     * @param array $record Database record to be reconstituted
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection
+     * @throws \RuntimeException
+     */
+    protected function createDomainObject(array $record)
+    {
+        switch ($record['type']) {
+            case self::TYPE_Static:
+                $collection = StaticRecordCollection::create($record);
+                break;
+            default:
+                throw new \RuntimeException('Unknown record collection type "' . $record['type'], 1328646798);
+        }
+        return $collection;
+    }
+
+    /**
+     * Creates multiple record collection domain objects.
+     *
+     * @param array $data Array of multiple database records to be reconstituted
+     * @return \TYPO3\CMS\Core\Collection\AbstractRecordCollection[]
+     */
+    protected function createMultipleDomainObjects(array $data)
+    {
+        $collections = [];
+        foreach ($data as $collection) {
+            $collections[] = $this->createDomainObject($collection);
+        }
+        return $collections;
+    }
+
+    /**
+     * Function to return the current TYPO3_MODE (FE/BE) based on $GLOBALS[TSFE].
+     * This function can be mocked in unit tests to be able to test frontend behaviour.
+     *
+     * @return string
+     */
+    protected function getEnvironmentMode(): string
+    {
+        return ($GLOBALS['TSFE'] ?? null) instanceof TypoScriptFrontendController ? 'FE' : 'BE';
+    }
+}
diff --git a/Classes/Collection/StaticRecordCollection.php b/Classes/Collection/StaticRecordCollection.php
new file mode 100644
index 0000000..30dc8bb
--- /dev/null
+++ b/Classes/Collection/StaticRecordCollection.php
@@ -0,0 +1,204 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the TYPO3 Extension "legacy_collections".
+ *
+ * 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!
+ */
+
+namespace FriendsOfTYPO3\LegacyCollections\Collection;
+
+use TYPO3\CMS\Core\Collection\AbstractRecordCollection;
+use TYPO3\CMS\Core\Collection\CollectionInterface;
+use TYPO3\CMS\Core\Collection\EditableCollectionInterface;
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * Implementation of a RecordCollection for static TCA-Records
+ */
+class StaticRecordCollection extends AbstractRecordCollection implements EditableCollectionInterface
+{
+    protected static $storageTableName = 'sys_collection';
+
+    /**
+     * Creates a new collection objects and reconstitutes the
+     * given database record to the new object.
+     *
+     * @param array $collectionRecord Database record
+     * @param bool $fillItems Populates the entries directly on load, might be bad for memory on large collections
+     * @return StaticRecordCollection
+     */
+    public static function create(array $collectionRecord, $fillItems = false)
+    {
+        $collection = GeneralUtility::makeInstance(
+            self::class,
+            $collectionRecord['table_name']
+        );
+        $collection->fromArray($collectionRecord);
+        if ($fillItems) {
+            $collection->loadContents();
+        }
+        return $collection;
+    }
+
+    /**
+     * Creates this object.
+     *
+     * @param string $tableName Name of the table to be working on
+     * @throws \RuntimeException
+     */
+    public function __construct($tableName = null)
+    {
+        parent::__construct();
+        if (!empty($tableName)) {
+            $this->setItemTableName($tableName);
+        } elseif (empty($this->itemTableName)) {
+            throw new \RuntimeException(self::class . ' needs a valid itemTableName.', 1330293778);
+        }
+    }
+
+    /**
+     * Populates the content-entries of the storage
+     *
+     * Queries the underlying storage for entries of the collection
+     * and adds them to the collection data.
+     *
+     * If the content entries of the storage had not been loaded on creation
+     * ($fillItems = false) this function is to be used for loading the contents
+     * afterwards.
+     */
+    public function loadContents()
+    {
+        $entries = $this->getCollectedRecords();
+        $this->removeAll();
+        foreach ($entries as $entry) {
+            $this->add($entry);
+        }
+    }
+
+    /**
+     * Returns an array of the persistable properties and contents
+     * which are processable by DataHandler.
+     *
+     * for internal usage in persist only.
+     *
+     * @return array
+     */
+    protected function getPersistableDataArray()
+    {
+        return [
+            'title' => $this->getTitle(),
+            'description' => $this->getDescription(),
+            'items' => $this->getItemUidList(true),
+            'type' => 'static',
+            'table_name' => $this->getItemTableName()
+        ];
+    }
+
+    /**
+     * Adds on entry to the collection
+     *
+     * @param mixed $data
+     */
+    public function add($data)
+    {
+        $this->storage->push($data);
+    }
+
+    /**
+     * Adds a set of entries to the collection
+     *
+     * @param CollectionInterface $other
+     */
+    public function addAll(CollectionInterface $other)
+    {
+        foreach ($other as $value) {
+            $this->add($value);
+        }
+    }
+
+    /**
+     * Removes the given entry from collection
+     *
+     * Note: not the given "index"
+     *
+     * @param mixed $data
+     */
+    public function remove($data)
+    {
+        $offset = 0;
+        foreach ($this->storage as $value) {
+            if ($value == $data) {
+                break;
+            }
+            $offset++;
+        }
+        $this->storage->offsetUnset($offset);
+    }
+
+    /**
+     * Removes all entries from the collection
+     *
+     * collection will be empty afterwards
+     */
+    public function removeAll()
+    {
+        $this->storage = new \SplDoublyLinkedList();
+    }
+
+    /**
+     * Gets the collected records in this collection, by
+     * looking up the MM relations of this record to the
+     * table name defined in the local field 'table_name'.
+     *
+     * @return array
+     */
+    protected function getCollectedRecords()
+    {
+        $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getQueryBuilderForTable(self::getCollectionDatabaseTable());
+        $queryBuilder->getRestrictions()->removeAll();
+        $statement = $queryBuilder->select($this->getItemTableName() . '.*')
+            ->from(self::getCollectionDatabaseTable())
+            ->join(
+                self::getCollectionDatabaseTable(),
+                'sys_collection_entries',
+                'sys_collection_entries',
+                $queryBuilder->expr()->eq(
+                    'sys_collection_entries.uid_local',
+                    $queryBuilder->quoteIdentifier(self::getCollectionDatabaseTable() . '.uid')
+                )
+            )
+            ->join(
+                'sys_collection_entries',
+                $this->getItemTableName(),
+                $this->getItemTableName(),
+                $queryBuilder->expr()->eq(
+                    'sys_collection_entries.uid_foreign',
+                    $queryBuilder->quoteIdentifier($this->getItemTableName() . '.uid')
+                )
+            )
+            ->where(
+                $queryBuilder->expr()->eq(
+                    self::getCollectionDatabaseTable() . '.uid',
+                    $queryBuilder->createNamedParameter($this->getIdentifier(), \PDO::PARAM_INT)
+                )
+            )
+            ->execute();
+        $relatedRecords = [];
+        while ($record = $statement->fetch()) {
+            $relatedRecords[] = $record;
+        }
+        return $relatedRecords;
+    }
+}
diff --git a/Configuration/TCA/sys_collection.php b/Configuration/TCA/sys_collection.php
new file mode 100644
index 0000000..1782fc0
--- /dev/null
+++ b/Configuration/TCA/sys_collection.php
@@ -0,0 +1,194 @@
+<?php
+return [
+    'ctrl' => [
+        'title' => 'LLL:EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf:sys_collection',
+        'label' => 'title',
+        'tstamp' => 'tstamp',
+        'crdate' => 'crdate',
+        'cruser_id' => 'cruser_id',
+        'descriptionColumn' => 'description',
+        'versioningWS' => true,
+        'origUid' => 't3_origuid',
+        'languageField' => 'sys_language_uid',
+        'transOrigPointerField' => 'l10n_parent',
+        'transOrigDiffSourceField' => 'l10n_diffsource',
+        'default_sortby' => 'crdate',
+        'delete' => 'deleted',
+        'type' => 'type',
+        'rootLevel' => -1,
+        'searchFields' => 'title,description',
+        'typeicon_column' => 'type',
+        'typeicon_classes' => [
+            'default' => 'apps-clipboard-list',
+            'static' => 'apps-clipboard-list',
+            'filter' => 'actions-system-tree-search-open'
+        ],
+        'enablecolumns' => [
+            'disabled' => 'hidden',
+            'starttime' => 'starttime',
+            'endtime' => 'endtime',
+            'fe_group' => 'fe_group'
+        ],
+    ],
+    'columns' => [
+        'sys_language_uid' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.language',
+            'config' => [
+                'type' => 'select',
+                'renderType' => 'selectSingle',
+                'foreign_table' => 'sys_language',
+                'items' => [
+                    ['LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.allLanguages', -1],
+                    ['LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.default_value', 0]
+                ],
+                'default' => 0,
+                'fieldWizard' => [
+                    'selectIcons' => [
+                        'disabled' => false,
+                    ],
+                ],
+            ]
+        ],
+        'l10n_parent' => [
+            'displayCond' => 'FIELD:sys_language_uid:>:0',
+            'label' => 'LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.l18n_parent',
+            'config' => [
+                'type' => 'select',
+                'renderType' => 'selectSingle',
+                'items' => [
+                    ['', 0]
+                ],
+                'foreign_table' => 'sys_file_collection',
+                'foreign_table_where' => 'AND sys_file_collection.pid=###CURRENT_PID### AND sys_file_collection.sys_language_uid IN (-1,0)'
+            ]
+        ],
+        'l10n_diffsource' => [
+            'config' => [
+                'type' => 'passthrough',
+                'default' => ''
+            ]
+        ],
+        'hidden' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.enabled',
+            'config' => [
+                'type' => 'check',
+                'renderType' => 'checkboxToggle',
+                'default' => 0,
+                'items' => [
+                    [
+                        0 => '',
+                        1 => '',
+                        'invertStateDisplay' => true
+                    ]
+                ],
+            ]
+        ],
+        'starttime' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.starttime',
+            'config' => [
+                'type' => 'input',
+                'renderType' => 'inputDateTime',
+                'eval' => 'date,int',
+                'default' => 0,
+            ]
+        ],
+        'endtime' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.endtime',
+            'config' => [
+                'type' => 'input',
+                'renderType' => 'inputDateTime',
+                'eval' => 'date,int',
+                'default' => 0,
+                'range' => [
+                    'upper' => mktime(0, 0, 0, 1, 1, 2038),
+                ]
+            ]
+        ],
+        'fe_group' => [
+            'exclude' => true,
+            'label' => 'LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.fe_group',
+            'config' => [
+                'type' => 'select',
+                'renderType' => 'selectSingle',
+                'items' => [
+                    ['', 0],
+                    ['LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.hide_at_login', -1],
+                    ['LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.any_login', -2],
+                    ['LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.usergroups', '--div--']
+                ],
+                'foreign_table' => 'fe_groups'
+            ]
+        ],
+        'table_name' => [
+            'label' => 'LLL:EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf:sys_collection.table_name',
+            'config' => [
+                'type' => 'select',
+                'renderType' => 'selectSingle',
+                'special' => 'tables'
+            ]
+        ],
+        'items' => [
+            'label' => 'LLL:EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf:sys_collection.items',
+            'config' => [
+                'type' => 'group',
+                'internal_type' => 'db',
+                'prepend_tname' => true,
+                'allowed' => '*',
+                'MM' => 'sys_collection_entries',
+                'MM_hasUidField' => true,
+                'multiple' => true,
+                'size' => 5
+            ]
+        ],
+        'title' => [
+            'label' => 'LLL:EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf:sys_collection.title',
+            'config' => [
+                'type' => 'input',
+                'size' => 60,
+                'eval' => 'required'
+            ]
+        ],
+        'description' => [
+            'label' => 'LLL:EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf:sys_collection.description',
+            'config' => [
+                'type' => 'text',
+                'cols' => 60,
+                'rows' => 5
+            ]
+        ],
+        'type' => [
+            'label' => 'LLL:EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf:sys_collection.type',
+            'config' => [
+                'type' => 'select',
+                'renderType' => 'selectSingle',
+                'items' => [
+                    ['LLL:EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf:sys_collection.type.static', 'static']
+                ],
+                'default' => 'static'
+            ]
+        ]
+    ],
+    'types' => [
+        'static' => [
+            'showitem' => '
+                --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:general,
+                    type,title,table_name,items,
+                --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:language,
+                    --palette--;;language,
+                --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:access,
+                    hidden,--palette--;;timeRestriction,fe_group,
+                --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:notes,
+                    description,
+                --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:extended,
+            ',
+        ],
+    ],
+    'palettes' => [
+        'timeRestriction' => ['showitem' => 'starttime, endtime'],
+        'language' => ['showitem' => 'sys_language_uid, l10n_parent'],
+    ]
+];
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..d159169
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,339 @@
+                    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
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+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
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
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+
+  For example, if you distribute copies of such a program, whether
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+source code.  And you must show them these terms so they know their
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+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
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+  The precise terms and conditions for copying, distribution and
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+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
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+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
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+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
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+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
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+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
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+
+  4. You may not copy, modify, sublicense, or distribute the Program
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+otherwise to copy, modify, sublicense or distribute the Program is
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+
+  5. You are not required to accept this License, since you have not
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+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
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+You are not responsible for enforcing compliance by third parties to
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+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
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+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
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+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
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+
+It is not the purpose of this section to induce you to infringe any
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+implemented by public license practices.  Many people have made
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+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
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+make exceptions for this.  Our decision will be guided by the two goals
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+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     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.
+
+  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
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    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
+when it starts in an interactive mode:
+
+    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.
diff --git a/Migrations/Code/ClassAliasMap.php b/Migrations/Code/ClassAliasMap.php
new file mode 100644
index 0000000..e3354be
--- /dev/null
+++ b/Migrations/Code/ClassAliasMap.php
@@ -0,0 +1,5 @@
+<?php
+return [
+    'TYPO3\\CMS\\Core\\Collection\\StaticRecordCollection' => \FriendsOfTYPO3\LegacyCollections\Collection\StaticRecordCollection::class,
+    'TYPO3\\CMS\\Core\\Collection\\RecordCollectionRepository' => \FriendsOfTYPO3\LegacyCollections\Collection\RecordCollectionRepository::class,
+];
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..72ef24c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,38 @@
+# TYPO3 Extension "legacy_collections"
+
+This extension provides TCA information and database tables for the generic "sys_collections"
+concept, which allows for statically select items into a collection.
+
+In addition, two API classes for fetching items from a collection are available as well:
+
+* `FriendsOfTYPO3\LegacyCollections\Collection\RecordCollectionRepository`
+* `FriendsOfTYPO3\LegacyCollections\Collection\StaticRecordCollection`
+
+Both classes previously resided in the PHP namespace `TYPO3\CMS\Core\Collection`.
+
+The functionality was part of the TYPO3 Core until TYPO3 v11.0, and moved into its
+own extension, receiving its own public repository.
+
+## Installation
+The latest version can be installed via TER (https://extensions.typo3.org) or via composer
+by adding `composer require friendsoftypo3/legacy-collections` in a TYPO3 v10.0+ installation.
+
+## Current state
+The extension has been part of TYPO3 Core for a very long time but its API wasn't flexible
+enough to build a generic collection model. It may become more healthy if maintained as third party
+extension and has been extracted for this reason.
+
+## Contribution
+Feel free to submit any pull request, or add documentation, tests, as you please.
+We will publish a new version every once in a while, depending on the amount of changes
+and pull requests submitted.
+
+### License
+The extension is published under GPL v2+, all included third-party libraries are
+published under their respective licenses.
+
+### Authors
+Many contributors have been working on this area while this functionality was part of
+the TYPO3 Core. This package is now maintained by a loose group of TYPO3 enthusiasts inside
+the TYPO3 Community. Feel free to contact Benni Mack (benni.mack@typo3.org) for any questions
+regarding "legacy_collections".
diff --git a/Resources/Private/Language/locallang_tca.xlf b/Resources/Private/Language/locallang_tca.xlf
new file mode 100644
index 0000000..52dc19b
--- /dev/null
+++ b/Resources/Private/Language/locallang_tca.xlf
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xliff version="1.0" xmlns:t3="http://typo3.org/schemas/xliff">
+	<file t3:id="1596184914" source-language="en" datatype="plaintext" original="EXT:legacy_collections/Resources/Private/Language/locallang_tca.xlf" date="2020-07-31T08:22:34Z" product-name="legacy_collections">
+		<header/>
+		<body>
+			<trans-unit id="sys_collection" resname="sys_collection">
+				<source>Record Collection</source>
+			</trans-unit>
+			<trans-unit id="sys_collection.title" resname="sys_collection.title">
+				<source>Collection-Name</source>
+			</trans-unit>
+			<trans-unit id="sys_collection.description" resname="sys_collection.description">
+				<source>Description</source>
+			</trans-unit>
+			<trans-unit id="sys_collection.table_name" resname="sys_collection.table_name">
+				<source>Record Type of Collection</source>
+			</trans-unit>
+			<trans-unit id="sys_collection.items" resname="sys_collection.items">
+				<source>Items</source>
+			</trans-unit>
+			<trans-unit id="sys_collection.type" resname="sys_collection.type">
+				<source>Type of collection</source>
+			</trans-unit>
+			<trans-unit id="sys_collection.type.static" resname="sys_collection.type.static">
+				<source>static record composition</source>
+			</trans-unit>
+		</body>
+	</file>
+</xliff>
diff --git a/Tests/Functional/Collection/RecordCollectionRepositoryTest.php b/Tests/Functional/Collection/RecordCollectionRepositoryTest.php
new file mode 100644
index 0000000..3f03bad
--- /dev/null
+++ b/Tests/Functional/Collection/RecordCollectionRepositoryTest.php
@@ -0,0 +1,335 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the TYPO3 Extension "legacy_collections".
+ *
+ * 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!
+ */
+
+namespace FriendsOfTYPO3\LegacyCollections\Tests\Functional\Collection;
+
+use Doctrine\DBAL\DBALException;
+use Doctrine\DBAL\Platforms\SQLServerPlatform;
+use FriendsOfTYPO3\LegacyCollections\Collection\RecordCollectionRepository;
+use FriendsOfTYPO3\LegacyCollections\Collection\StaticRecordCollection;
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Core\Utility\StringUtility;
+use TYPO3\TestingFramework\Core\Functional\FunctionalTestCase;
+
+/**
+ * Test case for \FriendsOfTYPO3\LegacyCollections\Collection\RecordCollectionRepository
+ */
+class RecordCollectionRepositoryTest extends FunctionalTestCase
+{
+    /**
+     * @var RecordCollectionRepository|\PHPUnit\Framework\MockObject\MockObject
+     */
+    protected $subject;
+
+    /**
+     * @var string
+     */
+    protected $testTableName;
+
+    /**
+     * Sets up this test case.
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->subject = $this->getMockBuilder(RecordCollectionRepository::class)
+            ->setMethods(['getEnvironmentMode'])
+            ->getMock();
+        $this->testTableName = StringUtility::getUniqueId('tx_testtable');
+    }
+
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+
+        GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getConnectionForTable('sys_collection')
+            ->truncate('sys_collection');
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByTypeReturnNull()
+    {
+        $type = RecordCollectionRepository::TYPE_Static;
+        $objects = $this->subject->findByType($type);
+        self::assertNull($objects);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByTypeReturnObjects()
+    {
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            ['uid' => 1, 'type' => $type, 'table_name' => $this->testTableName],
+            ['uid' => 2, 'type' => $type, 'table_name' => $this->testTableName]
+        ]);
+
+        $objects = $this->subject->findByType($type);
+        self::assertCount(2, $objects);
+        self::assertInstanceOf(StaticRecordCollection::class, $objects[0]);
+        self::assertInstanceOf(StaticRecordCollection::class, $objects[1]);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByTableNameReturnNull()
+    {
+        $objects = $this->subject->findByTableName($this->testTableName);
+        self::assertNull($objects);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByTableNameReturnObjects()
+    {
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            ['uid' => 1, 'type' => $type, 'table_name' => $this->testTableName],
+            ['uid' => 2, 'type' => $type, 'table_name' => $this->testTableName]
+        ]);
+        $objects = $this->subject->findByTableName($this->testTableName);
+
+        self::assertCount(2, $objects);
+        self::assertInstanceOf(StaticRecordCollection::class, $objects[0]);
+        self::assertInstanceOf(StaticRecordCollection::class, $objects[1]);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByTypeAndTableNameReturnNull()
+    {
+        $type = RecordCollectionRepository::TYPE_Static;
+        $objects = $this->subject->findByTypeAndTableName($type, $this->testTableName);
+
+        self::assertNull($objects);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByTypeAndTableNameReturnObjects()
+    {
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            ['uid' => 1, 'type' => $type, 'table_name' => $this->testTableName],
+            ['uid' => 2, 'type' => $type, 'table_name' => $this->testTableName]
+        ]);
+        $objects = $this->subject->findByTypeAndTableName($type, $this->testTableName);
+
+        self::assertCount(2, $objects);
+        self::assertInstanceOf(StaticRecordCollection::class, $objects[0]);
+        self::assertInstanceOf(StaticRecordCollection::class, $objects[1]);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByUidReturnAnObjectInBackendMode()
+    {
+        $this->subject->method('getEnvironmentMode')->willReturn('BE');
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            [
+                'uid' => 1,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'deleted' => 0,
+                'hidden' => 0,
+                'starttime' => 0,
+                'endtime' => 0
+            ]
+        ]);
+        $object = $this->subject->findByUid(1);
+
+        self::assertInstanceOf(StaticRecordCollection::class, $object);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByUidRespectDeletedFieldInBackendMode()
+    {
+        $this->subject->method('getEnvironmentMode')->willReturn('BE');
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            [
+                'uid' => 1,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'deleted' => 1,
+                'hidden' => 0,
+                'starttime' => 0,
+                'endtime' => 0
+            ]
+        ]);
+        $object = $this->subject->findByUid(1);
+
+        self::assertNull($object);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByUidIgnoreOtherEnableFieldsInBackendMode()
+    {
+        $this->subject->method('getEnvironmentMode')->willReturn('BE');
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            [
+                'uid' => 1,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'hidden' => 1,
+            ],
+            [
+                'uid' => 2,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'starttime' => time() + 99999,
+            ],
+            [
+                'uid' => 3,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'endtime' => time() - 99999
+            ]
+        ]);
+        $hiddenObject  = $this->subject->findByUid(1);
+        $futureObject  = $this->subject->findByUid(2);
+        $expiredObject = $this->subject->findByUid(3);
+
+        self::assertInstanceOf(StaticRecordCollection::class, $hiddenObject);
+        self::assertInstanceOf(StaticRecordCollection::class, $futureObject);
+        self::assertInstanceOf(StaticRecordCollection::class, $expiredObject);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByUidReturnAnObjectInFrontendMode()
+    {
+        $this->subject->method('getEnvironmentMode')->willReturn('FE');
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            [
+                'uid' => 1,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'deleted' => 0,
+                'hidden' => 0,
+                'starttime' => 0,
+                'endtime' => 0
+            ]
+        ]);
+        $object = $this->subject->findByUid(1);
+
+        self::assertInstanceOf(StaticRecordCollection::class, $object);
+    }
+
+    /**
+     * @test
+     */
+    public function doesFindByUidRespectEnableFieldsInFrontendMode()
+    {
+        $this->subject->method('getEnvironmentMode')->willReturn('FE');
+        $type = RecordCollectionRepository::TYPE_Static;
+        $this->insertTestData([
+            [
+                'uid' => 1,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'deleted' => 1,
+            ],
+            [
+                'uid' => 2,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'hidden' => 1,
+            ],
+            [
+                'uid' => 3,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'starttime' => time() + 99999,
+            ],
+            [
+                'uid' => 4,
+                'type' => $type,
+                'table_name' => $this->testTableName,
+                'endtime' => time() - 99999
+            ]
+        ]);
+        $deletedObject = $this->subject->findByUid(1);
+        $hiddenObject  = $this->subject->findByUid(2);
+        $futureObject  = $this->subject->findByUid(3);
+        $expiredObject = $this->subject->findByUid(4);
+
+        self::assertNull($deletedObject);
+        self::assertNull($hiddenObject);
+        self::assertNull($futureObject);
+        self::assertNull($expiredObject);
+    }
+
+    /**
+     * Insert test rows into the sys_collection table
+     *
+     * @param array $rows
+     */
+    protected function insertTestData(array $rows)
+    {
+        $connection = GeneralUtility::makeInstance(ConnectionPool::class)->getConnectionForTable('sys_collection');
+        $platform = $connection->getDatabasePlatform();
+        $sqlServerIdentityDisabled = false;
+        if ($platform instanceof SQLServerPlatform) {
+            try {
+                $connection->exec('SET IDENTITY_INSERT sys_collection ON');
+                $sqlServerIdentityDisabled = true;
+            } catch (DBALException $e) {
+                // Some tables like sys_refindex don't have an auto-increment uid field and thus no
+                // IDENTITY column. Instead of testing existence, we just try to set IDENTITY ON
+                // and catch the possible error that occurs.
+            }
+        }
+
+        $types = [];
+        $tableDetails = $connection->getSchemaManager()->listTableDetails('sys_collection');
+        foreach ($rows as $row) {
+            foreach ($row as $columnName => $columnValue) {
+                $types[] = $tableDetails->getColumn($columnName)->getType()->getBindingType();
+            }
+            break;
+        }
+
+        foreach ($rows as $row) {
+            $connection->insert('sys_collection', $row, $types);
+        }
+
+        if ($sqlServerIdentityDisabled) {
+            // Reset identity if it has been changed
+            $connection->exec('SET IDENTITY_INSERT sys_collection OFF');
+        }
+    }
+}
diff --git a/Tests/Functional/Tca/CollectionVisibleFieldsTest.php b/Tests/Functional/Tca/CollectionVisibleFieldsTest.php
new file mode 100644
index 0000000..b83c647
--- /dev/null
+++ b/Tests/Functional/Tca/CollectionVisibleFieldsTest.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the TYPO3 Extension "legacy_collections".
+ *
+ * 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!
+ */
+
+namespace FriendsOfTYPO3\LegacyCollections\Tests\Functional\Tca;
+
+use TYPO3\CMS\Backend\Tests\Functional\Form\FormTestService;
+use TYPO3\CMS\Core\Localization\LanguageService;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\TestingFramework\Core\Functional\FunctionalTestCase;
+
+class CollectionVisibleFieldsTest extends FunctionalTestCase
+{
+    protected static $collectionFields = [
+        'title',
+        'sys_language_uid',
+        'hidden',
+        'type',
+        'description',
+        'table_name',
+        'items',
+        'starttime',
+        'endtime',
+    ];
+
+    /**
+     * @test
+     */
+    public function collectionFormContainsExpectedFields()
+    {
+        $this->setUpBackendUserFromFixture(1);
+        $GLOBALS['LANG'] = GeneralUtility::makeInstance(LanguageService::class);
+
+        $formEngineTestService = GeneralUtility::makeInstance(FormTestService::class);
+        $formResult = $formEngineTestService->createNewRecordForm('sys_collection');
+
+        foreach (static::$collectionFields as $expectedField) {
+            self::assertNotFalse(
+                $formEngineTestService->formHtmlContainsField($expectedField, $formResult['html']),
+                'The field ' . $expectedField . ' is not in the form HTML'
+            );
+        }
+    }
+}
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..bfafce2
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,35 @@
+{
+	"name": "friendsoftypo3/legacy-collections",
+	"type": "typo3-cms-extension",
+	"description": "Legacy Collection PHP APIs for sys_collection database tables.",
+	"homepage": "https://typo3.org",
+	"license": ["GPL-2.0+"],
+	"require": {
+		"php": "^7.2",
+		"typo3/cms-core": "^10.0 || ^11.0",
+		"typo3/cms-frontend": "^10.0 || ^11.0"
+	},
+	"require-dev": {
+		"typo3/testing-framework": "^6.3.2"
+	},
+	"extra": {
+		"typo3/class-alias-loader": {
+			"class-alias-maps": [
+				"Migrations/Code/ClassAliasMap.php"
+			]
+		},
+		"typo3/cms": {
+			"extension-key": "legacy_collections"
+		}
+	},
+	"autoload": {
+		"psr-4": {
+			"FriendsOfTYPO3\\LegacyCollections\\": "Classes/"
+		}
+	},
+	"autoload-dev": {
+		"psr-4": {
+			"FriendsOfTYPO3\\LegacyCollections\\Tests\\": "Tests/"
+		}
+	}
+}
diff --git a/ext_emconf.php b/ext_emconf.php
new file mode 100644
index 0000000..bf37334
--- /dev/null
+++ b/ext_emconf.php
@@ -0,0 +1,22 @@
+<?php
+
+$EM_CONF[$_EXTKEY] = [
+    'title' => 'Legacy Collection PHP APIs for sys_collection database tables',
+    'description' => 'Adds PHP classes, TCA configuration and database tables for generic record collections.',
+    'category' => 'misc',
+    'state' => 'stable',
+    'clearCacheOnLoad' => 0,
+    'author' => 'Benni Mack',
+    'author_email' => 'benni@typo3.org',
+    'author_company' => '',
+    'version' => '1.0.0',
+    'constraints' => [
+        'depends' => [
+            'typo3' => '11.0.0',
+            'extbase' => '11.0.0',
+            'fluid' => '11.0.0',
+        ],
+        'conflicts' => [],
+        'suggests' => [],
+    ],
+];
diff --git a/ext_tables.sql b/ext_tables.sql
new file mode 100644
index 0000000..7f6894f
--- /dev/null
+++ b/ext_tables.sql
@@ -0,0 +1,24 @@
+#
+# Table structure for table 'sys_collection'
+#
+CREATE TABLE sys_collection (
+	title tinytext,
+	type varchar(32) DEFAULT 'static' NOT NULL,
+	table_name tinytext,
+	items int(11) DEFAULT '0' NOT NULL
+);
+
+#
+# Table structure for table 'sys_collection_entries'
+#
+CREATE TABLE sys_collection_entries (
+	uid int(11) NOT NULL auto_increment,
+	uid_local int(11) DEFAULT '0' NOT NULL,
+	uid_foreign int(11) DEFAULT '0' NOT NULL,
+	tablenames varchar(64) DEFAULT '' NOT NULL,
+	sorting int(11) DEFAULT '0' NOT NULL,
+
+	KEY uid_local (uid_local),
+	KEY uid_foreign (uid_foreign),
+	PRIMARY KEY (uid)
+);