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packages/vitec/Classes/Backend/FormEngine/StructuredDataGeneratorWizard.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Evomedien\Vitec\Backend\FormEngine;
+
+use TYPO3\CMS\Backend\Form\AbstractNode;
+use TYPO3\CMS\Core\Page\JavaScriptModuleInstruction;
+
+/**
+ * FormEngine fieldWizard rendered below the product `structureddata` field.
+ * Adds a "generate" button that, on click, asks the backend AJAX endpoint to
+ * build the JSON-LD for the current product and writes it into the field.
+ *
+ * Registered as nodeName "structuredDataGenerator" (see ext_localconf.php) and
+ * attached via TCA fieldWizard on tx_vitec_domain_model_product.structureddata.
+ *
+ * The button carries data-vitec-sd-generate (so the self-initializing JS module
+ * binds via event delegation) and data-field-name = the textarea's form name
+ * (itemFormElName — the reliable field reference; itemFormElID is empty in this
+ * context). The JS resolves the textarea via [name="…"] with a DOM fallback.
+ *
+ * The actual generation lives server-side in
+ * {@see \Evomedien\Vitec\Controller\Backend\StructuredDataController}.
+ */
+final class StructuredDataGeneratorWizard extends AbstractNode
+{
+    public function render(): array
+    {
+        $result = $this->initializeResultArray();
+
+        $row = $this->data['databaseRow'] ?? [];
+        $rawUid = $row['uid'] ?? null;
+        $uid = (int)$rawUid;
+        $isNew = !is_numeric($rawUid) || $uid <= 0;
+
+        $itemName = (string)($this->data['parameterArray']['itemFormElName'] ?? '');
+        $buttonId = 'vitec-sd-generate-' . md5($itemName);
+
+        $hint = $isNew
+            ? '<span class="text-warning">Bitte das Produkt zuerst speichern, dann steht die Generierung zur Verfügung.</span>'
+            : 'Erzeugt das JSON-LD aus den gespeicherten Produktdaten und überschreibt den Feldinhalt.';
+
+        $html = [];
+        $html[] = '<div class="vitec-sd-generator" style="margin-top:.5rem">';
+        $html[] = sprintf(
+            '<button type="button" class="btn btn-default btn-sm" id="%s" data-vitec-sd-generate="1" data-uid="%d" data-field-name="%s"%s>',
+            htmlspecialchars($buttonId),
+            $uid,
+            htmlspecialchars($itemName),
+            $isNew ? ' disabled' : ''
+        );
+        $html[] = 'Structured Data generieren';
+        $html[] = '</button>';
+        $html[] = '<div class="form-text">' . $hint . '</div>';
+        $html[] = '</div>';
+
+        $result['html'] = implode("\n", $html);
+        $result['javaScriptModules'][] = JavaScriptModuleInstruction::create(
+            '@evomedien/vitec/structured-data-generator.js'
+        );
+
+        return $result;
+    }
+}