fix: date tables and group booking links on TYPO3 13

- Uri\ProductViewHelper builds links with the Extbase UriBuilder (no
  controller context in v13), also from content elements
- Null-safe reads of missing row fields and plugin settings, with the
  values PHP 7.4 produced
- /gruppe/ without a product redirects to the search page again
  instead of failing on findByIdentifier(null)

Checked against the TYPO3 10 project: 355 of 359 /gruppe/{product}
pages identical (the rest differ by newer content), all product pages
render, 377 of 396 date tables load (the 19 others fail on TYPO3 10
too: products without a hotel).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/ep_theme/Classes/ViewHelpers/Uri/ProductViewHelper.php

@@ -27,6 +27,12 @@ namespace EP\EpTheme\ViewHelpers\Uri;
  *  This copyright notice MUST APPEAR in all copies of the script!
  ***************************************************************/
 
+use Psr\Http\Message\ServerRequestInterface;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Extbase\Mvc\ExtbaseRequestParameters;
+use TYPO3\CMS\Extbase\Mvc\Request;
+use TYPO3\CMS\Extbase\Mvc\RequestInterface;
+use TYPO3\CMS\Extbase\Mvc\Web\Routing\UriBuilder;
 use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
 use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
 
@@ -73,10 +79,9 @@ class ProductViewHelper extends AbstractViewHelper
             ];
         }
         $targetPageUid = is_array($product) ? (int)$product['detailPage'] : $product->getDetailPage();
-        $uri = $this->renderingContext
-            ->getControllerContext()
-            ->getUriBuilder()
+        $uri = GeneralUtility::makeInstance(UriBuilder::class)
             ->reset()
+            ->setRequest($this->getExtbaseRequest())
             ->setTargetPageUid($targetPageUid)
             ->uriFor('detail', $linkArguments, 'Product', 'epproducts', 'product_detail')
         ;
@@ -89,4 +94,19 @@ class ProductViewHelper extends AbstractViewHelper
         return $uri;
     }
 
+    /**
+     * The view helper is also used in content elements, which render without an Extbase request
+     */
+    private function getExtbaseRequest(): RequestInterface
+    {
+        $request = $this->renderingContext->getAttribute(ServerRequestInterface::class);
+        if ($request instanceof RequestInterface) {
+            return $request;
+        }
+        if ($request->getAttribute('extbase') === null) {
+            $request = $request->withAttribute('extbase', new ExtbaseRequestParameters());
+        }
+        return new Request($request);
+    }
+
 }