Fix: verschachtelte Inhaltselemente rekursiv kopieren (tl_content -> tl_content)

contao/templates/be_dummy_copier.html5

@@ -1,7 +1,4 @@
-<?php $this->extend('be_main'); ?>
+<form action="<?= $this->action; ?>" method="post" style="max-width:900px;">
-
-<?php $this->block('main'); ?>
-  <form action="<?= $this->action; ?>" method="post" style="max-width:900px;">
     <input type="hidden" name="REQUEST_TOKEN" value="<?= $this->requestToken; ?>">
     <input type="hidden" name="FORM_SUBMIT" value="tl_dummy_copier">
 
@@ -11,13 +8,17 @@
       .dc-tools { margin: 0.25rem 0 0.5rem; display: flex; gap: 0.5rem; }
       .dc-filter { width: 100%; margin: 0.25rem 0; }
       .dc-button { padding: 0.15rem 0.45rem; }
+      .dc-section { border: 1px solid #ccc; padding: 1rem; margin-bottom: 1.5rem; border-radius: 4px; }
+      .dc-section h3 { margin: 0 0 0.75rem; font-size: 1rem; font-weight: bold; }
+      .dc-hint { color: #666; font-size: 0.85rem; margin: 0.25rem 0 0.75rem; }
     </style>
 
-    <p>
+    <!-- Abschnitt 1: Quell-Seiten -->
-      <label>Quell-Seiten (Mehrfachauswahl):<br>
+    <div class="dc-section">
-        <?php if (!empty($this->sourcePagesWidget)): ?>
+      <h3>1. Quell-Seiten auswaehlen</h3>
-          <?= $this->sourcePagesWidget; ?>
+      <p class="dc-hint">Alle Artikel und Inhaltselemente der gewaehlten Seiten werden automatisch mitkopiert (sofern Option "inkl. Content" aktiv ist).</p>
-        <?php else: ?>
+      <p>
+        <label>Quell-Seiten (Mehrfachauswahl):<br>
           <input class="dc-filter" type="text" data-filter-for="sourcePages" placeholder="Seiten filtern...">
           <span class="dc-tools">
             <button class="dc-button" type="button" data-select-all="sourcePages">Alle</button>
@@ -25,99 +26,100 @@
           </span>
           <select id="sourcePages" name="sourcePages[]" multiple size="12" style="width:100%;">
             <?php foreach (($this->pageChoices ?? []) as $id => $label): ?>
-              <option value="<?= (int) $id; ?>" <?= in_array((int) $id, ($this->selected['sourcePages'] ?? []), true) ? 'selected' : ''; ?>><?= $this->specialchars((string) $label); ?></option>
+              <option value="<?= (int) $id; ?>" <?= in_array((int) $id, ($this->selected['sourcePages'] ?? []), true) ? 'selected' : ''; ?>><?= htmlspecialchars((string) $label, ENT_QUOTES, 'UTF-8'); ?></option>
             <?php endforeach; ?>
           </select>
-        <?php endif; ?>
+        </label>
-      </label>
+      </p>
-    </p>
+    </div>
 
-    <p>
+    <!-- Abschnitt 2: Quell-Module -->
-      <label>Quell-Module (Mehrfachauswahl):<br>
+    <div class="dc-section">
-        <input class="dc-filter" type="text" data-filter-for="sourceModules" placeholder="Module filtern...">
+      <h3>2. Quell-Module auswaehlen</h3>
-        <span class="dc-tools">
+      <p class="dc-hint">Ausgewaehlte Module werden kopiert; Referenzen in den kopierten Seiten werden automatisch auf die neuen Module umgebogen.</p>
-          <button class="dc-button" type="button" data-select-all="sourceModules">Alle</button>
+      <p>
-          <button class="dc-button" type="button" data-select-none="sourceModules">Keine</button>
+        <label>Module (Mehrfachauswahl):<br>
-        </span>
+          <input class="dc-filter" type="text" data-filter-for="sourceModules" placeholder="Module filtern...">
-        <select id="sourceModules" name="sourceModules[]" multiple size="10" style="width:100%;">
+          <span class="dc-tools">
-          <?php foreach (($this->moduleChoices ?? []) as $id => $label): ?>
+            <button class="dc-button" type="button" data-select-all="sourceModules">Alle</button>
-            <option value="<?= (int) $id; ?>" <?= in_array((int) $id, ($this->selected['sourceModules'] ?? []), true) ? 'selected' : ''; ?>><?= $this->specialchars((string) $label); ?></option>
+            <button class="dc-button" type="button" data-select-none="sourceModules">Keine</button>
-          <?php endforeach; ?>
+          </span>
-        </select>
+          <select id="sourceModules" name="sourceModules[]" multiple size="10" style="width:100%;">
-      </label>
+            <?php foreach (($this->moduleChoices ?? []) as $id => $label): ?>
-    </p>
+              <option value="<?= (int) $id; ?>" <?= in_array((int) $id, ($this->selected['sourceModules'] ?? []), true) ? 'selected' : ''; ?>><?= htmlspecialchars((string) $label, ENT_QUOTES, 'UTF-8'); ?></option>
+            <?php endforeach; ?>
+          </select>
+        </label>
+      </p>
+    </div>
 
-    <p>
+    <!-- Abschnitt 3: Quell-Verzeichnisse -->
-      <label>Quell-Content (optional, Mehrfachauswahl):<br>
+    <div class="dc-section">
-        <input class="dc-filter" type="text" data-filter-for="sourceContent" placeholder="Content filtern...">
+      <h3>3. Quell-Verzeichnisse auswaehlen (optional)</h3>
-        <span class="dc-tools">
+      <p class="dc-hint">Optionale Dateiverzeichnisse, die gespiegelt werden sollen.</p>
-          <button class="dc-button" type="button" data-select-all="sourceContent">Alle</button>
+      <p>
-          <button class="dc-button" type="button" data-select-none="sourceContent">Keine</button>
+        <label>Verzeichnisse (Mehrfachauswahl):<br>
-        </span>
-        <select id="sourceContent" name="sourceContent[]" multiple size="10" style="width:100%;">
-          <?php foreach (($this->contentChoices ?? []) as $id => $label): ?>
-            <option value="<?= (int) $id; ?>" <?= in_array((int) $id, ($this->selected['sourceContent'] ?? []), true) ? 'selected' : ''; ?>><?= $this->specialchars((string) $label); ?></option>
-          <?php endforeach; ?>
-        </select>
-      </label>
-    </p>
-
-    <p>
-      <label>Quell-Verzeichnisse (optional, Mehrfachauswahl):<br>
-        <?php if (!empty($this->sourceDirectoriesWidget)): ?>
-          <?= $this->sourceDirectoriesWidget; ?>
-        <?php else: ?>
           <input class="dc-filter" type="text" data-filter-for="sourceDirectories" placeholder="Verzeichnisse filtern...">
           <span class="dc-tools">
             <button class="dc-button" type="button" data-select-all="sourceDirectories">Alle</button>
             <button class="dc-button" type="button" data-select-none="sourceDirectories">Keine</button>
           </span>
-          <select id="sourceDirectories" name="sourceDirectories[]" multiple size="10" style="width:100%;">
+          <select id="sourceDirectories" name="sourceDirectories[]" multiple size="8" style="width:100%;">
             <?php foreach (($this->directoryChoices ?? []) as $path => $label): ?>
-              <option value="<?= $this->specialchars((string) $path); ?>" <?= in_array((string) $path, ($this->selected['sourceDirectories'] ?? []), true) ? 'selected' : ''; ?>><?= $this->specialchars((string) $label); ?></option>
+              <option value="<?= htmlspecialchars((string) $path, ENT_QUOTES, 'UTF-8'); ?>" <?= in_array((string) $path, ($this->selected['sourceDirectories'] ?? []), true) ? 'selected' : ''; ?>><?= htmlspecialchars((string) $label, ENT_QUOTES, 'UTF-8'); ?></option>
             <?php endforeach; ?>
           </select>
-        <?php endif; ?>
+        </label>
-      </label>
+      </p>
-    </p>
+    </div>
 
-    <p>
+    <!-- Abschnitt 4: Kopieroptionen -->
-      <label>Ziel-Elternseite:<br>
+    <div class="dc-section">
-        <?php if (!empty($this->targetParentPageWidget)): ?>
+      <h3>4. Kopieroptionen</h3>
-          <?= $this->targetParentPageWidget; ?>
+      <p><label><input type="checkbox" name="includeContent" value="1" <?= ($this->selected['includeContent'] ?? true) ? 'checked' : ''; ?>> Artikel &amp; Inhaltselemente der Seiten mitkopieren</label></p>
-        <?php else: ?>
+      <p><label><input type="checkbox" name="copyModules" value="1" <?= ($this->selected['copyModules'] ?? true) ? 'checked' : ''; ?>> Module kopieren und in den kopierten Seiten neu verlinken</label></p>
+      <p><label><input type="checkbox" name="copyDirectories" value="1" <?= ($this->selected['copyDirectories'] ?? false) ? 'checked' : ''; ?>> Ausgewaehlte Verzeichnisse in Ziel-Verzeichnis kopieren</label></p>
+      <p><label><input type="checkbox" name="dryRun" value="1" <?= ($this->selected['dryRun'] ?? false) ? 'checked' : ''; ?>> Dry-Run (nur Vorschau, keine Schreibzugriffe)</label></p>
+    </div>
+
+    <!-- Abschnitt 5: Ziel -->
+    <div class="dc-section">
+      <h3>5. Ziel &amp; Benennung</h3>
+      <p>
+        <label>Ziel-Elternseite (Pflichtfeld):<br>
           <select name="targetParentPage" required style="width:100%;">
             <option value="">Bitte waehlen</option>
             <?php foreach (($this->pageChoices ?? []) as $id => $label): ?>
-              <option value="<?= (int) $id; ?>" <?= ((int) ($this->selected['targetParentPage'] ?? 0) === (int) $id) ? 'selected' : ''; ?>><?= $this->specialchars((string) $label); ?></option>
+              <option value="<?= (int) $id; ?>" <?= ((int) ($this->selected['targetParentPage'] ?? 0) === (int) $id) ? 'selected' : ''; ?>><?= htmlspecialchars((string) $label, ENT_QUOTES, 'UTF-8'); ?></option>
             <?php endforeach; ?>
           </select>
-        <?php endif; ?>
+        </label>
-      </label>
+      </p>
-    </p>
+      <p>
-
+        <label>Ziel-Verzeichnis fuer Dateien (z. B. files/kunden/kunde-x):<br>
-    <p><label>Ziel-Artikel ID (nur fuer einzelne Content-IDs):<br><input type="number" name="targetArticle" min="0" value="<?= (int) ($this->selected['targetArticle'] ?? 0); ?>"></label></p>
+          <input type="text" name="targetDirectory" style="width:100%" placeholder="files/kunden/mein-kunde" value="<?= htmlspecialchars((string) ($this->selected['targetDirectory'] ?? ''), ENT_QUOTES, 'UTF-8'); ?>">
-    <p><label>Ziel-Verzeichnis (z. B. files/kunden/kunde-x):<br><input type="text" name="targetDirectory" style="width:100%" value="<?= $this->specialchars((string) ($this->selected['targetDirectory'] ?? '')); ?>"></label></p>
+        </label>
-    <p><label>Praefix fuer Titel/Name/Alias:<br><input type="text" name="namePrefix" placeholder="kunde-x-" value="<?= $this->specialchars((string) ($this->selected['namePrefix'] ?? '')); ?>"></label></p>
+      </p>
-
+      <p>
-    <p><label><input type="checkbox" name="includeContent" value="1" checked> Seiten inkl. Artikel/Content kopieren</label></p>
+        <label>Praefix fuer Titel / Name / Alias der Kopien:<br>
-    <p><label><input type="checkbox" name="copyModules" value="1" checked> Module kopieren und neu verlinken</label></p>
+          <input type="text" name="namePrefix" style="width:100%" placeholder="z. B. kunde-x-" value="<?= htmlspecialchars((string) ($this->selected['namePrefix'] ?? ''), ENT_QUOTES, 'UTF-8'); ?>">
-    <p><label><input type="checkbox" name="copyDirectories" value="1"> Verzeichnisse kopieren</label></p>
+        </label>
-    <p><label><input type="checkbox" name="dryRun" value="1"> Dry-Run (keine Schreibzugriffe)</label></p>
+      </p>
+    </div>
 
     <p><button class="tl_submit" type="submit">Ausfuehren</button></p>
 
     <?php if (isset($this->result) && \is_object($this->result)): ?>
       <h3>Ergebnis</h3>
-      <pre><?= json_encode([
+      <pre><?= htmlspecialchars(json_encode([
-          'copiedPages' => $this->result->copiedPages,
+          'copiedPages'       => $this->result->copiedPages,
-          'copiedModules' => $this->result->copiedModules,
+          'copiedModules'     => $this->result->copiedModules,
-          'copiedContent' => $this->result->copiedContent,
+          'copiedContent'     => $this->result->copiedContent,
           'copiedDirectories' => $this->result->copiedDirectories,
-          'pageMap' => $this->result->pageMap,
+          'pageMap'           => $this->result->pageMap,
-          'moduleMap' => $this->result->moduleMap,
+          'moduleMap'         => $this->result->moduleMap,
-          'notes' => $this->result->notes,
+          'notes'             => $this->result->notes,
-      ], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES); ?></pre>
+      ], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES), ENT_QUOTES, 'UTF-8'); ?></pre>
     <?php endif; ?>
 
     <script>
@@ -127,11 +129,7 @@
         document.querySelectorAll('[data-filter-for]').forEach(function (input) {
           input.addEventListener('input', function () {
             var select = byId(input.getAttribute('data-filter-for'));
-
+            if (!select) { return; }
-            if (!select) {
-              return;
-            }
-
             var query = (input.value || '').toLowerCase();
             Array.prototype.forEach.call(select.options, function (option) {
               option.hidden = query !== '' && option.text.toLowerCase().indexOf(query) === -1;
@@ -142,15 +140,9 @@
         document.querySelectorAll('[data-select-all]').forEach(function (button) {
           button.addEventListener('click', function () {
             var select = byId(button.getAttribute('data-select-all'));
-
+            if (!select) { return; }
-            if (!select) {
-              return;
-            }
-
             Array.prototype.forEach.call(select.options, function (option) {
-              if (!option.hidden) {
+              if (!option.hidden) { option.selected = true; }
-                option.selected = true;
-              }
             });
           });
         });
@@ -158,11 +150,7 @@
         document.querySelectorAll('[data-select-none]').forEach(function (button) {
           button.addEventListener('click', function () {
             var select = byId(button.getAttribute('data-select-none'));
-
+            if (!select) { return; }
-            if (!select) {
-              return;
-            }
-
             Array.prototype.forEach.call(select.options, function (option) {
               option.selected = false;
             });
@@ -170,5 +158,4 @@
         });
       })();
     </script>
-  </form>
+</form>
-<?php $this->endblock(); ?>

src/Backend/DummyCopierModule.php

@@ -8,14 +8,12 @@ use Webfarben\DummyCopier\Service\DummyCopier;
 use Webfarben\DummyCopier\Service\DummyCopyOptions;
 use Contao\BackendModule;
 use Contao\Environment;
-use Contao\FileTree;
 use Contao\Input;
 use Contao\Message;
-use Contao\PageTree;
 use Contao\StringUtil;
 use Contao\System;
-use Contao\Widget;
 use Doctrine\DBAL\Connection;
+use Symfony\Component\Filesystem\Filesystem;
 
 class DummyCopierModule extends BackendModule
 {
@@ -23,43 +21,42 @@ class DummyCopierModule extends BackendModule
 
     protected function compile(): void
     {
-        $connection = System::getContainer()->get(Connection::class);
+        /** @var Connection $connection */
+        $connection = System::getContainer()->get('database_connection');
 
         $this->Template->action = Environment::get('request');
-        $this->Template->requestToken = \defined('REQUEST_TOKEN') ? REQUEST_TOKEN : '';
+        $this->Template->requestToken = $this->getCsrfToken();
         $this->Template->pageChoices = $this->getPageChoices($connection);
         $this->Template->moduleChoices = $this->getModuleChoices($connection);
-        $this->Template->contentChoices = $this->getContentChoices($connection);
         $this->Template->directoryChoices = $this->getDirectoryChoices();
-        $this->Template->sourcePagesWidget = '';
+
-        $this->Template->targetParentPageWidget = '';
-        $this->Template->sourceDirectoriesWidget = '';
         $targetParentPageId = $this->parseSingleIdInput(Input::postRaw('targetParentPage'));
+        $isPost = Input::post('FORM_SUBMIT') === 'tl_dummy_copier';
 
         $this->Template->selected = [
             'sourcePages' => $this->parseIdInput(Input::postRaw('sourcePages')),
             'sourceModules' => $this->parseIdInput(Input::postRaw('sourceModules')),
-            'sourceContent' => $this->parseIdInput(Input::postRaw('sourceContent')),
             'sourceDirectories' => $this->parsePathInput(Input::postRaw('sourceDirectories')),
             'targetParentPage' => $targetParentPageId,
-            'targetArticle' => (int) Input::post('targetArticle'),
             'targetDirectory' => trim((string) Input::post('targetDirectory')),
             'namePrefix' => trim((string) Input::post('namePrefix')),
+            'includeContent'    => !$isPost || (bool) Input::post('includeContent'),
+            'copyModules'       => !$isPost || (bool) Input::post('copyModules'),
+            'copyDirectories'   => $isPost && (bool) Input::post('copyDirectories'),
+            'dryRun'            => $isPost && (bool) Input::post('dryRun'),
         ];
 
-        $this->prepareTreeWidgets();
+        if (!$isPost) {
-
-        if (Input::post('FORM_SUBMIT') !== 'tl_dummy_copier') {
             return;
         }
 
         $options = new DummyCopyOptions(
             $this->parseIdInput(Input::postRaw('sourcePages')),
             $this->parseIdInput(Input::postRaw('sourceModules')),
-            $this->parseIdInput(Input::postRaw('sourceContent')),
+            [],
             $this->parsePathInput(Input::postRaw('sourceDirectories')),
             $targetParentPageId,
-            (int) Input::post('targetArticle'),
+            0,
             trim((string) Input::post('targetDirectory')),
             trim((string) Input::post('namePrefix')),
             (bool) Input::post('includeContent'),
@@ -69,8 +66,11 @@ class DummyCopierModule extends BackendModule
         );
 
         try {
-            /** @var DummyCopier $copier */
+            $copier = new DummyCopier(
-            $copier = System::getContainer()->get(DummyCopier::class);
+                $connection,
+                new Filesystem(),
+                (string) System::getContainer()->getParameter('kernel.project_dir')
+            );
             $result = $copier->execute($options);
 
             Message::addConfirmation(sprintf(
@@ -138,85 +138,24 @@ class DummyCopierModule extends BackendModule
         return $ids[0] ?? 0;
     }
 
-    private function prepareTreeWidgets(): void
+    private function getCsrfToken(): string
     {
-        if (!class_exists(PageTree::class) || !class_exists(FileTree::class) || !class_exists(Widget::class)) {
+        $container = System::getContainer();
-            return;
+
+        // Contao 5: use Symfony CSRF token manager
+        if ($container->has('contao.csrf.token_manager')) {
+            return $container
+                ->get('contao.csrf.token_manager')
+                ->getToken((string) $container->getParameter('contao.csrf_token_name'))
+                ->getValue();
         }
 
-        try {
+        // Contao 4 fallback
-            $selectedPages = $this->parseIdInput(Input::postRaw('sourcePages'));
+        if (\defined('REQUEST_TOKEN')) {
-            $selectedParent = (int) Input::post('targetParentPage');
+            return REQUEST_TOKEN;
-            $selectedDirectories = $this->parsePathInput(Input::postRaw('sourceDirectories'));
-
-            $this->Template->sourcePagesWidget = $this->renderPageTreeWidget(
-                'sourcePages',
-                'Quell-Seiten (pageTree)',
-                $selectedPages,
-                true
-            );
-
-            $this->Template->targetParentPageWidget = $this->renderPageTreeWidget(
-                'targetParentPage',
-                'Ziel-Elternseite (pageTree)',
-                $selectedParent > 0 ? [$selectedParent] : [],
-                false
-            );
-
-            $this->Template->sourceDirectoriesWidget = $this->renderFileTreeWidget(
-                'sourceDirectories',
-                'Quell-Verzeichnisse (fileTree)',
-                $selectedDirectories
-            );
-        } catch (\Throwable $exception) {
-            // If widget rendering differs by Contao version, the module falls back to select boxes.
-            $this->Template->sourcePagesWidget = '';
-            $this->Template->targetParentPageWidget = '';
-            $this->Template->sourceDirectoriesWidget = '';
-            Message::addInfo('Tree-Widgets konnten nicht initialisiert werden, Fallback-Auswahl wird verwendet.');
         }
-    }
 
-    private function renderPageTreeWidget(string $name, string $label, array $value, bool $multiple): string
+        return '';
-    {
-        $attributes = Widget::getAttributesFromDca([
-            'inputType' => 'pageTree',
-            'label' => [$label, ''],
-            'eval' => [
-                'fieldType' => $multiple ? 'checkbox' : 'radio',
-                'multiple' => $multiple,
-                'tl_class' => 'clr',
-            ],
-        ], $name, $value, $name, 'tl_dummy_copier');
-
-        $attributes['id'] = $name;
-        $attributes['name'] = $name;
-
-        $widget = new PageTree($attributes);
-
-        return $widget->generate();
-    }
-
-    private function renderFileTreeWidget(string $name, string $label, array $value): string
-    {
-        $attributes = Widget::getAttributesFromDca([
-            'inputType' => 'fileTree',
-            'label' => [$label, ''],
-            'eval' => [
-                'fieldType' => 'checkbox',
-                'filesOnly' => false,
-                'files' => false,
-                'multiple' => true,
-                'tl_class' => 'clr',
-            ],
-        ], $name, $value, $name, 'tl_dummy_copier');
-
-        $attributes['id'] = $name;
-        $attributes['name'] = $name;
-
-        $widget = new FileTree($attributes);
-
-        return $widget->generate();
     }
 
     /**
@@ -285,7 +224,12 @@ class DummyCopierModule extends BackendModule
      */
     private function getModuleChoices(Connection $connection): array
     {
-        $rows = $connection->fetchAllAssociative('SELECT id, name, type FROM tl_module ORDER BY id');
+        $rows = $connection->fetchAllAssociative(
+            'SELECT m.id, m.name, m.type, t.name AS theme_name
+             FROM tl_module m
+             LEFT JOIN tl_theme t ON t.id = m.pid
+             ORDER BY t.name, m.type, m.name'
+        );
         $choices = [];
 
         foreach ($rows as $row) {
@@ -297,38 +241,14 @@ class DummyCopierModule extends BackendModule
 
             $name = trim((string) ($row['name'] ?? 'Modul ' . $id));
             $type = trim((string) ($row['type'] ?? ''));
-            $label = $type !== '' ? sprintf('%s (%s)', $name, $type) : $name;
+            $theme = trim((string) ($row['theme_name'] ?? ''));
+            $label = $theme !== '' ? sprintf('[%s] %s (%s)', $theme, $name, $type) : sprintf('%s (%s)', $name, $type);
             $choices[$id] = sprintf('%s [ID %d]', $label, $id);
         }
 
         return $choices;
     }
 
-    /**
-     * @return array<int,string>
-     */
-    private function getContentChoices(Connection $connection): array
-    {
-        $rows = $connection->fetchAllAssociative('SELECT id, type, pid, headline FROM tl_content ORDER BY id');
-        $choices = [];
-
-        foreach ($rows as $row) {
-            $id = (int) ($row['id'] ?? 0);
-
-            if ($id < 1) {
-                continue;
-            }
-
-            $type = trim((string) ($row['type'] ?? 'content'));
-            $pid = (int) ($row['pid'] ?? 0);
-            $headline = $this->normalizeHeadline($row['headline'] ?? null);
-            $label = $headline !== '' ? sprintf('%s: %s', $type, $headline) : $type;
-            $choices[$id] = sprintf('%s [ID %d, Artikel %d]', $label, $id, $pid);
-        }
-
-        return $choices;
-    }
-
     /**
      * @return array<string,string>
      */

src/DummyCopierBundle.php

@@ -8,4 +8,8 @@ use Symfony\Component\HttpKernel\Bundle\Bundle;
 
 class DummyCopierBundle extends Bundle
 {
+	public function getPath(): string
+	{
+		return \dirname(__DIR__);
+	}
 }

src/Service/DummyCopier.php

@@ -149,11 +149,24 @@ final class DummyCopier
 
             $newArticleId = $this->insertRow('tl_article', $articleRow);
 
-            $contentIds = $this->connection->fetchFirstColumn('SELECT id FROM tl_content WHERE ptable = ? AND pid = ? ORDER BY sorting', ['tl_article', (int) $articleId]);
+            $this->copyArticleContentTree((int) $articleId, $newArticleId, $moduleMap, $result);
+        }
+    }
 
-            foreach ($contentIds as $contentId) {
+    /**
-                $this->copySingleContent((int) $contentId, $newArticleId, $moduleMap, $result);
+     * Copies top-level article content and all nested child elements recursively.
-            }
+     *
+     * @param array<int,int> $moduleMap
+     */
+    private function copyArticleContentTree(int $sourceArticleId, int $targetArticleId, array $moduleMap, DummyCopyResult $result): void
+    {
+        $contentIds = $this->connection->fetchFirstColumn(
+            'SELECT id FROM tl_content WHERE ptable = ? AND pid = ? ORDER BY sorting',
+            ['tl_article', $sourceArticleId]
+        );
+
+        foreach ($contentIds as $contentId) {
+            $this->copyContentRecursive((int) $contentId, 'tl_article', $targetArticleId, $moduleMap, $result);
         }
     }
 
@@ -161,19 +174,29 @@ final class DummyCopier
      * @param array<int,int> $moduleMap
      */
     private function copySingleContent(int $sourceContentId, int $targetArticleId, array $moduleMap, DummyCopyResult $result): void
+    {
+        $this->copyContentRecursive($sourceContentId, 'tl_article', $targetArticleId, $moduleMap, $result);
+    }
+
+    /**
+     * Recursively copies one content element and its children.
+     *
+     * @param array<int,int> $moduleMap
+     */
+    private function copyContentRecursive(int $sourceContentId, string $targetPtable, int $targetPid, array $moduleMap, DummyCopyResult $result): int
     {
         $contentRow = $this->fetchRow('tl_content', $sourceContentId);
 
         if ($contentRow === null) {
             $result->addNote(sprintf('Content %d nicht gefunden, wurde uebersprungen.', $sourceContentId));
-            return;
+            return 0;
         }
 
         unset($contentRow['id']);
-        $contentRow['pid'] = $targetArticleId;
+        $contentRow['pid'] = $targetPid;
-        $contentRow['ptable'] = 'tl_article';
+        $contentRow['ptable'] = $targetPtable;
         $contentRow['tstamp'] = time();
-        $contentRow['sorting'] = $this->nextSorting('tl_content', 'pid', $targetArticleId, 'ptable', 'tl_article');
+        $contentRow['sorting'] = $this->nextSorting('tl_content', 'pid', $targetPid, 'ptable', $targetPtable);
 
         if (($contentRow['type'] ?? '') === 'module') {
             $oldModule = (int) ($contentRow['module'] ?? 0);
@@ -190,6 +213,17 @@ final class DummyCopier
         if (isset($contentRow['jumpTo'], $result->pageMap[(int) $contentRow['jumpTo']])) {
             $this->connection->update('tl_content', ['jumpTo' => $result->pageMap[(int) $contentRow['jumpTo']]], ['id' => $newContentId]);
         }
+
+        $childIds = $this->connection->fetchFirstColumn(
+            'SELECT id FROM tl_content WHERE ptable = ? AND pid = ? ORDER BY sorting',
+            ['tl_content', $sourceContentId]
+        );
+
+        foreach ($childIds as $childId) {
+            $this->copyContentRecursive((int) $childId, 'tl_content', $newContentId, $moduleMap, $result);
+        }
+
+        return $newContentId;
     }
 
     private function rewriteReferences(DummyCopyResult $result): void
@@ -342,10 +376,55 @@ final class DummyCopier
         }
 
         $articlePlaceholders = implode(',', array_fill(0, \count($articleIds), '?'));
-
+        $rootContentIds = $this->connection->fetchFirstColumn(
-        return $count + (int) $this->connection->fetchOne(
+            sprintf('SELECT id FROM tl_content WHERE ptable = ? AND pid IN (%s)', $articlePlaceholders),
-            sprintf('SELECT COUNT(*) FROM tl_content WHERE ptable = ? AND pid IN (%s)', $articlePlaceholders),
             array_merge(['tl_article'], array_map('intval', $articleIds))
         );
+
+        if ($rootContentIds === []) {
+            return $count;
+        }
+
+        return $count + $this->countContentTree(array_map('intval', $rootContentIds));
+    }
+
+    /**
+     * Counts content roots and all nested descendants.
+     *
+     * @param array<int,int> $rootIds
+     */
+    private function countContentTree(array $rootIds): int
+    {
+        if ($rootIds === []) {
+            return 0;
+        }
+
+        $seen = [];
+        $queue = array_values(array_filter($rootIds, static fn (int $id): bool => $id > 0));
+
+        while ($queue !== []) {
+            $currentBatch = [];
+
+            foreach ($queue as $id) {
+                if (!isset($seen[$id])) {
+                    $seen[$id] = true;
+                    $currentBatch[] = $id;
+                }
+            }
+
+            if ($currentBatch === []) {
+                break;
+            }
+
+            $placeholders = implode(',', array_fill(0, \count($currentBatch), '?'));
+            $children = $this->connection->fetchFirstColumn(
+                sprintf('SELECT id FROM tl_content WHERE ptable = ? AND pid IN (%s)', $placeholders),
+                array_merge(['tl_content'], $currentBatch)
+            );
+
+            $queue = array_map('intval', $children);
+        }
+
+        return \count($seen);
     }
 }