[TASK] prevent changing language fields for container children

Fixes: #499

Author: achimfritz

Classes/Hooks/Datahandler/DatamapBeforeStartHook.php

@@ -17,6 +17,7 @@
 use B13\Container\Domain\Service\ContainerService;
 use B13\Container\Tca\Registry;
 use TYPO3\CMS\Core\DataHandling\DataHandler;
+use TYPO3\CMS\Core\Utility\MathUtility;
 
 class DatamapBeforeStartHook
 {
@@ -56,6 +57,49 @@ public function processDatamap_beforeStart(DataHandler $dataHandler): void
     {
         $dataHandler->datamap = $this->datamapForChildLocalizations($dataHandler->datamap);
         $dataHandler->datamap = $this->datamapForChildrenChangeContainerLanguage($dataHandler->datamap);
+        $dataHandler->datamap = $this->denyChangingOfLanguageFieldsForContainerChildren($dataHandler->datamap, $dataHandler);
+    }
+
+    protected function denyChangingOfLanguageFieldsForContainerChildren(array $datamap, DataHandler $dataHandler):array
+    {
+        foreach ($datamap['tt_content'] ?? [] as $uid => &$datas) {
+            if (!MathUtility::canBeInterpretedAsInteger($uid)) {
+                continue;
+            }
+            if (!isset($datas['sys_language_uid']) && !isset($datas['l18n_parent'])) {
+                continue;
+            }
+            $record = $this->database->fetchOneRecord((int)$uid);
+            if ($record === null || (int)($record['tx_container_parent'] ?? 0) === 0) {
+                continue;
+            }
+            if (isset($datas['sys_language_uid'])) {
+                $dataHandler->log(
+                    'tt_content',
+                    $uid,
+                    2,
+                    0,
+                    1,
+                    'cannot change language of container child record',
+                    28
+                );
+                unset($datas['sys_language_uid']);
+            }
+            if (isset($datas['l18n_parent'])) {
+                unset($datas['l18n_parent']);
+                $dataHandler->log(
+                    'tt_content',
+                    $uid,
+                    2,
+                    0,
+                    1,
+                    'cannot change parent of container child record',
+                    28
+                );
+            }
+            $datamap['tt_content'][$uid] = $datas;
+        }
+        return $datamap;
     }
 
     protected function datamapForChildLocalizations(array $datamap): array

Tests/Functional/Datahandler/Localization/ConnectedMode/ContainerChildrenTest.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace B13\Container\Tests\Functional\Datahandler\Localization\ConnectedMode;
+
+/*
+ * This file is part of TYPO3 CMS-based extension "container" by b13.
+ *
+ * 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.
+ */
+
+use B13\Container\Tests\Functional\Datahandler\AbstractDatahandler;
+
+class ContainerChildrenTest extends AbstractDatahandler
+{
+    /**
+     * @test
+     */
+    public function cannotChangeLanguageOfTranslatedChild(): void
+    {
+        $this->importCSVDataSet(__DIR__ . '/Fixtures/ContainerChildren/translated_container_with_children.csv');
+        $datamap = [
+            'tt_content' => [
+                22 => [
+                    'sys_language_uid' => 0,
+                ],
+            ],
+        ];
+        $this->dataHandler->start($datamap, [], $this->backendUser);
+        $this->dataHandler->process_datamap();
+        self::assertCSVDataSet(__DIR__ . '/Fixtures/ContainerChildren/translated_container_with_children.csv');
+        self::assertNotEmpty($this->dataHandler->errorLog, 'dataHander error log is empty');
+    }
+
+    /**
+     * @test
+     */
+    public function cannotChangeL18nParentOfTranslatedChild(): void
+    {
+        $this->importCSVDataSet(__DIR__ . '/Fixtures/ContainerChildren/translated_container_with_children.csv');
+        $datamap = [
+            'tt_content' => [
+                22 => [
+                    'l18n_parent' => 1,
+                ],
+            ],
+        ];
+        $this->dataHandler->start($datamap, [], $this->backendUser);
+        $this->dataHandler->process_datamap();
+        self::assertCSVDataSet(__DIR__ . '/Fixtures/ContainerChildren/translated_container_with_children.csv');
+        self::assertNotEmpty($this->dataHandler->errorLog, 'dataHander error log is empty');
+    }
+}

Tests/Functional/Datahandler/Localization/ConnectedMode/Fixtures/ContainerChildren/translated_container_with_children.csv

@@ -0,0 +1,10 @@
+"pages"
+,"uid","pid","title","slug","sys_language_uid","l10n_parent","l10n_source"
+,1,0,"page-1","/",0,0,0
+,2,0,"page-1-language-1","/",1,1,1
+"tt_content"
+,"uid","pid","CType","header","sorting","sys_language_uid","colPos","tx_container_parent","l18n_parent"
+,1,1,"b13-2cols-with-header-container","container-default",256,0,0,0,0
+,2,1,"header","header-default",128,0,200,1,0
+,21,1,"b13-2cols-with-header-container","container-language-1",256,1,0,0,1
+,22,1,"header","header-language-1",128,1,200,1,2