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typo3/sysext/backend/Classes/Controller/LiveSearchController.php

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+<?php
+namespace TYPO3\CMS\Backend\Controller;
+
+/*
+ * 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 Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use TYPO3\CMS\Backend\Search\LiveSearch\LiveSearch;
+use TYPO3\CMS\Backend\Search\LiveSearch\QueryParser;
+use TYPO3\CMS\Core\Http\JsonResponse;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * Returns the results for any live searches, e.g. in the toolbar
+ * @internal This class is a specific Backend controller implementation and is not considered part of the Public TYPO3 API.
+ */
+class LiveSearchController
+{
+    /**
+     * @var array
+     */
+    protected $searchResults = [];
+
+    /**
+     * Processes all AJAX calls and sends back a JSON object
+     *
+     * @param ServerRequestInterface $request
+     * @return ResponseInterface
+     */
+    public function liveSearchAction(ServerRequestInterface $request): ResponseInterface
+    {
+        $queryString = trim($request->getQueryParams()['q']);
+        $liveSearch = GeneralUtility::makeInstance(LiveSearch::class);
+        $queryParser = GeneralUtility::makeInstance(QueryParser::class);
+
+        $searchResults = [];
+        $liveSearch->setQueryString($queryString);
+        // Jump & edit - find page and retrieve an edit link (this is only for pages
+        if ($queryParser->isValidPageJump($queryString)) {
+            $commandQuery = $queryParser->getCommandForPageJump($queryString);
+            if ($commandQuery) {
+                $queryString = $commandQuery;
+            }
+        }
+        // Search through the database and find records who match to the given search string
+        $resultArray = $liveSearch->find($queryString);
+        foreach ($resultArray as $resultFromTable) {
+            foreach ($resultFromTable as $item) {
+                $searchResults[] = $item;
+            }
+        }
+        return (new JsonResponse())->setPayload($searchResults);
+    }
+}