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typo3/sysext/extbase/Classes/Hook/DataHandler/CheckFlexFormValue.php

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+<?php
+namespace TYPO3\CMS\Extbase\Hook\DataHandler;
+
+/*
+ * 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\DataHandling\DataHandler;
+
+/**
+ * @internal this is not part of TYPO3 Core API as it is a concrete hook implementation.
+ */
+class CheckFlexFormValue
+{
+    /**
+     * Check flexform value before merge
+     *
+     * @param DataHandler $dataHander
+     * @param array &$currentValue
+     * @param array &$newValue
+     */
+    public function checkFlexFormValue_beforeMerge(DataHandler $dataHander, array &$currentValue, array &$newValue)
+    {
+        $currentValue = $this->removeSwitchableControllerActionsRecursive($currentValue);
+    }
+
+    /**
+     * Remove switchable controller actions recursively
+     *
+     * @param array $a
+     * @return array
+     */
+    protected function removeSwitchableControllerActionsRecursive(array $a)
+    {
+        $r = [];
+
+        foreach ($a as $k => $v) {
+            if ($k === 'switchableControllerActions') {
+                continue;
+            }
+
+            $r[$k] = is_array($v) ? $this->removeSwitchableControllerActionsRecursive($v) : $v;
+        }
+
+        return $r;
+    }
+}