get Query Param text in Searchbar todo (caching Problem)

Classes/ViewHelpers/GetQueryParamsViewHelper.php

@@ -1,28 +1,29 @@
 <?php
-
 declare(strict_types=1);
 
 namespace Slub\LisztCommon\ViewHelpers;
 
 use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
 use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
-use TYPO3\CMS\Core\Utility\GeneralUtility;
-use TYPO3\CMS\Core\Type\File\ImageInfo;
-
-
 
 final class GetQueryParamsViewHelper extends AbstractViewHelper
 {
-
-
-    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext): array
+    public function initializeArguments(): void
     {
+        $this->registerArgument('param', 'string', 'Name of the parameter key', true);
+    }
 
-        /** @var RenderingContext $renderingContext */
+    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext): ?string
+    {
         $request = $renderingContext->getRequest();
+        $queryParams = $request->getQueryParams();
 
+        // Check if the argument param exists in the query parameters
+        if (array_key_exists($arguments['param'], $queryParams)) {
+            return $queryParams[$arguments['param']];
+        }
 
-        return $request->getQueryParams();
-
+        // Return null if parameter does not exist
+        return null;
     }
 }

Resources/Private/Partials/SearchBar.html

@@ -4,15 +4,14 @@
 
 <f:comment>ToDo: viewHelper for SearchParams</f:comment>
 <section id="searchbar" class="searchbar">
-
+<f:debug>{lw:getQueryParams(param: 'text')}</f:debug>
     <div class="container-xl">
-
-        <f:debug>{lw:getQueryParams()}</f:debug>
-
-        <form  method="get" class="form-inline">
+<f:comment>Todo: write a config var for serach action in form action method</f:comment>
+<f:comment>Cache Problem: https://b13.com/blog/caching-in-typo3-part-1-frontend-caches</f:comment>
+        <form  method="get" action="/bibliografie" class="form-inline">
             <div class="input-group mb-3">
 
-                <input name="searchTerm" value="" class="form-control no-shadow" aria="{label:'Text input with dropdown button'}" placeholder="" />
+                <input name="text" value="{lw:getQueryParams(param: 'text')}" class="form-control no-shadow" aria="{label:'Text input with dropdown button'}" placeholder="" />
                 <button class="btn btn-outline-dark" id="button-searchBar">{f:translate(key: 'searchButtonLabel', extensionName: 'liszt_common')}
                 </button>
             </div>

ext_localconf.php

@@ -8,11 +8,13 @@
 
 defined('TYPO3') or die();
 
+
+// Attention! ToDo: research for disable Cache for this Controller and Searchbar
 ExtensionUtility::configurePlugin(
     'LisztCommon',
     'SearchListing',
     [ SearchController::class => 'index' ],
-    [ SearchController::class => '' ]
+    [ SearchController::class => 'index' ]
 );
 
 ExtensionManagementUtility::addPageTSConfig(