TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
commit af8cc155b5
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+<?php
+
+declare(strict_types=1);
+
+/*
+ * 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!
+ */
+
+namespace TYPO3\CMS\Core\TypoScript\AST\Merger;
+
+use TYPO3\CMS\Core\TypoScript\AST\Node\ChildNodeInterface;
+use TYPO3\CMS\Core\TypoScript\AST\Node\NodeInterface;
+use TYPO3\CMS\Core\TypoScript\AST\Node\RootNode;
+
+/**
+ * Frontend TypoScript 'setup' has the main 'config' section for global config,
+ * plus a per type / typeNum specific PAGE 'config' (often page.config) that can
+ * override global 'config' per type / typeNum.
+ *
+ * This class merges both into the final 'config', later available in Request
+ * attribute 'frontend.typoscript' getConfigTree() and getConfigArray().
+ *
+ * @internal: Internal AST structure.
+ */
+final readonly class SetupConfigMerger
+{
+    public function merge(?ChildNodeInterface $config, ?ChildNodeInterface $pageConfig): RootNode
+    {
+        $configResult = new RootNode();
+        if ($config) {
+            foreach ($config->getNextChild() as $child) {
+                $configResult->addChild($child);
+            }
+        }
+        if (!$pageConfig) {
+            return $configResult;
+        }
+        $this->mergeRecursive($pageConfig, $configResult);
+        return $configResult;
+    }
+
+    private function mergeRecursive(ChildNodeInterface $mergeFrom, NodeInterface $mergeTo): void
+    {
+        foreach ($mergeFrom->getNextChild() as $mergeFromChild) {
+            $mergeToChild = $mergeTo->getChildByName($mergeFromChild->getName());
+            if (!$mergeToChild) {
+                $mergeTo->addChild($mergeFromChild);
+                continue;
+            }
+            $mergeFromChildValue = $mergeFromChild->getValue();
+            if ($mergeFromChildValue !== null && $mergeFromChildValue !== $mergeToChild->getValue()) {
+                $mergeToChild->setValue($mergeFromChildValue);
+            }
+            $this->mergeRecursive($mergeFromChild, $mergeToChild);
+        }
+    }
+}