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typo3/sysext/install/Classes/Controller/IconController.php

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+<?php
+declare(strict_types = 1);
+namespace TYPO3\CMS\Install\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\Core\Http\HtmlResponse;
+use TYPO3\CMS\Core\Imaging\IconFactory;
+use TYPO3\CMS\Core\Imaging\IconRegistry;
+use TYPO3\CMS\Core\Type\Icon\IconState;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * Controller for icon handling
+ * @internal This class is a specific controller implementation and is not considered part of the Public TYPO3 API.
+ */
+class IconController extends AbstractController
+{
+    /**
+     * @var IconRegistry
+     */
+    protected $iconRegistry;
+
+    /**
+     * @var IconFactory
+     */
+    protected $iconFactory;
+
+    /**
+     * Set up dependencies
+     */
+    public function __construct()
+    {
+        $this->iconRegistry = GeneralUtility::makeInstance(IconRegistry::class);
+        $this->iconFactory = GeneralUtility::makeInstance(IconFactory::class);
+    }
+
+    /**
+     * @return ResponseInterface
+     * @internal
+     */
+    public function getCacheIdentifierAction(): ResponseInterface
+    {
+        return new HtmlResponse($this->iconRegistry->getCacheIdentifier());
+    }
+
+    /**
+     * @param ServerRequestInterface $request
+     * @return ResponseInterface
+     * @internal
+     */
+    public function getIconAction(ServerRequestInterface $request): ResponseInterface
+    {
+        $parsedBody = $request->getParsedBody();
+        $queryParams = $request->getQueryParams();
+        $requestedIcon = json_decode($parsedBody['icon'] ?? $queryParams['icon'], true);
+
+        list($identifier, $size, $overlayIdentifier, $iconState, $alternativeMarkupIdentifier) = $requestedIcon;
+
+        if (empty($overlayIdentifier)) {
+            $overlayIdentifier = null;
+        }
+
+        $iconState = IconState::cast($iconState);
+        $icon = $this->iconFactory->getIcon($identifier, $size, $overlayIdentifier, $iconState);
+
+        return new HtmlResponse($icon->render($alternativeMarkupIdentifier));
+    }
+}